1949 Sept-1949, v.1, n.1 A New Amplifier for Milli-Microsecond Pulses, by N.B. Schrock Oct-1949, v.1, n.2 A New Frequency Standard and Time Interval Generator, by Brunton Bauer Nov-1949, v.1, n.3 Design Notes on the Resistance-Capacity Oscillator Circuit (Part I), by Brunton Bauer Dec-1949, v.1, n.4 Design Notes on the Resistance-Capacity Oscillator Circuit (Part II), by Brunton Bauer 1950 Jan-1950, v.1, n.5 Greater Reliability in UHF Impedance Measurements, by W.B. Wholey Feb-1950, v.1, n.6 A New 0.07-10 Microsecond General-Purpose Pulse Generator, by G.S. Kan March-1950, v.1, n.7 A New 10-500 Megacycle A-M Signal Generator, by H.E. Overacker April-1950, v.1, n.8 Direct Measurement of Impedance in the 50-500 MC Range, by Arthur Fong 10-500 MC VHF Detector May-1950, v.1, n.9 Direct Reading UHF Power Measurements, by B.P. Hand June-1950, v.1, n.10 The Explanation for Certain Cathode-Follower Effects, by Brunton Bauer Extended-Range Metered Power Supply July-1950, v.1, n.11 New 125-Volt Fast Pulse Amplifier, by N.B. Schrock Aug-1950, v.1, n.12 A New Monitor for FM Communications Services, by J.E. Stiles New Aural and Video Monitors for TV Stations Sept-1950, v.2, n.1 A 3800-7600 MC Signal Generator Using a Parallel-Plane Type Resonator, by W.D. Myers Oct-1950, v.2, n.2 A 10 MC Scaler for Nuclear Counting and Frequency Measurement, by A.S. Bagley Nov-1950, v.2, n.3 The 700 Megacycle Voltmeter and Its Applications, by J.R. Petrak Diode Replacement Kit Available For Model 410A Dec-1950, v.2 n.4 A New Low-Power Klystron Supply, by J.R. Petrak Balanced Load Measurements with VHF Bridge, by W.B Wholey Repair of Hewlett-Packard Instruments 1951 Jan-1951, v.2 n.5 The High-Speed Frequency Counter-A New Solution to Old Problems, by A.S. Bagley Feb-1951, v.2 n.6 The -hp- Program for Waveguide Type Measuring Equipment, by N.B. Schrock March/April-1951, v.2 n.7-8 Power Measurements from 10 to 12,400 Megacycles, by B. P. Hand, N.B. Schrock May-1951, v.2 n.9 Inexpensive Quality June-1951, v.2 n.10 A New Generator of Frequencies down to 0.01 CPS, by R.H. Brunner July-1951, v.2 n.11 Accuracy in -hp- Voltmeters and Oscillators, by R.M. Demere, Brunton Bauer 1951 WESTERN IRE CONVENTION Aug-1951, v.2 n.12 -hp- Distortion Measuring Equipment, by Brunton Bauer Sept-1951, v.3 n.1 Good Practice in Slotted Line Measurements...(Part I), by W.B. Wholey Good Practice in Slotted Line Measurements (Conclusion), by W.B. Wholey Oct-1951, v.3 n.2 Two New Test Sets for SHF Measurements Good Practice in Slotted Line Measurements (Conclusion), by W.B. Wholey Nov-1951, v.3 n.3 Recent Developments in -hp- Waveguide Type Measuring Equipment, by J.K. Hunton, N.B. Schrock Dec-1951, v.3 n.4 Oscillators for many purposes 1952 Jan/Feb-1952, v.3 n.5-6 Simplified Microwave Frequency Measurements Using the 10-MC Frequency Counter, by W.D. Myers The "Perfect Load" and the Null Shift-Aids in VSWR Measurements, by J.K. Hunton and W.B. Wholey March/April-1952, v.3 n.7-8 A Precision Directional Coupler Using Multi-Hole Coupling, by E.F. Barnett and J.K. Hunton May/June-1952, v.3 n.9-10 The -hp- Direct-Reading UHF Signal Generators, by Arthur Fong, W.D. Myers July-1952, v.3 n.11 A Novel Impedance-Measuring System Using Standard -hp- Instruments August-1952, v.3 n.12 The -hp- Audio Signal Generators Sept/Oct-1952, v.4 n-1-2 Greater Flexibility in the -hp- 3800-7600 Mc Signal Generator, by W.D. Myers Measuring Large Resistances With the -hp- 410 VTVM Checking Klystron Linearity with -hp- Equipment Nov-1952, v.4 n.3 A New 100 KC Counter for Use in Electronics and Industry, by E.A. Hilton Dec-1952, v.4 n.4 Those New -hp- Oscillators, by Brunton Bauer, B.M. Oliver Greater Power Capacity for the 8.5-10 KMC Test Set, by P.D. Lacy 1953 Jan/Feb-1953, v.4 n.5-6 More about the -hp- Precision Directional Couplers, by E.F. Barnett March/April-1953, v.4 n.7-8 A New Signal Generator for Aeronautical Radio and UHF Television, by H.E. Overacker Field Repair Stations May/June-1953, v.4 n.9-10 The -hp- TV Monitor, by Robert Grimm July/August-1953, v.4 n.11-12 Measurements to 100 Megacycles with the -hp- Frequency Counter, by Dexter Hartke Sept/Oct-1953, v.5 n.1-2 Time Interval Measurements with the -hp- Electronic Counter, by D.R. Scott, E.A. Hilton Nov/Dec-1953, v.5 n.3-4 A New 60-Cycle Per Revolution Generator for Precision Tachometry Measurements, by Wm. Girdner Table of Important Transforms 1954 Jan/Feb-1954, v.5 n.5-6 A New Signal Generator for the 7,000 to 11,000 MC Range, by Arthur Fong Hewlett Elected I.R.E. President March/April-1954, v.5 n.7-8 Frequency and Time Measurements with the New -hp- High Speed Counter, by Alan S. Bagley, Wm.D. Myers, Dexter Hartke May-1954, v.5 n.9 Wider Range and Higher Stability in the new -hp- 4 MC Voltmeter, by John Zevenbergen June-1954, v.5 n.10 The -hp- 500-Volt, 200-MA Metered Power Supply, by Don Broderick A Convenient Source of Multiple Pulses July-1954, v.5 n.11 New Conveniences for Microwave Power Measurements, by Wm. Gallagher, B.P. Hand Aug-1954, v.5 n.12 Advanced Performance in two new VHF Signal Generators, by H.E. Overacker Signal Generator Output Fuse Sept/Oct-1954, v.6 n.1-2 The -hp- Microwave Reflectometers, by N.L. Pappas, J.K. Hunton Nov/Dec-1954, v.6 n.3-4 New Broadband Microwave Power Amplifiers using Helix-Coupled TWT'S, by P.D. Lacy, D.E. Wheeler A New Helix-Forming Machine with Micro-inch Error, pg 6 1955 Jan-1955, v.6 n.5 A Precision Wave Guide Attenuator Which Obeys a Mathematical Law, by B.P. Hand A New Precision Wave Guide Phase Shifter, by E.F. Barnett Feb-1955, v.6 n.6 A New 10 MC to 12 KMC Coaxial Crystal Detector Mount, by N.B. Schrock New Plug-In Decade Counters of Refined Design, by Marvin Willrodt Two New Transformers for Measurements on Balanced Systems March-1955, v.6 n.7 A New Standing Wave Indicator with an Expanded VSWR Scale, by Brunton Bauer More Conveniences in the -hp- Microwave Power Meter, by Don Carmean April-1955, v.6 n.8 A New 10 CPS-600 KC High Stability VTVM, by John Zevenbergen Some Effects of Waveform on VTVM Readings , by B.M. Oliver May-1955, v.6 n.9 A New 1 CPS-1 MC Square Wave Generator with a 20-Millimicrosecond Rise Time, by Don Broderick Some Effects of Waveform on VTVM Readings (II), by B.M. Oliver June-1955, v.6 n.10 The New -hp- 15-21 KMC 10 MW Signal Generator, by Wm. D. Myers Some Effects of Waveform on VTVM Readings (Conclusion), by B.M. Oliver July-1955, v.6 n.11 A New 120 KC Industrial Counter for Measuring RPM, Velocity, Quantity, Flow, etc., by Frank Koziuk Aug-1955, v.6 n.12 A Simple Precision System for Measuring CW and Pulsed Frequencies Up to 12,400 MC, by Dexter Hartke Wavemeter Calibration, pg 5 Sept-1955, v.7 n.1 A New 3 CPS-100 KC Electronic Frequency Meter with Discriminator Output and Expandable Scale, by Duane Marshall Oct-1955, v.7 n.2 High-Directivity Coaxial Directional Couplers and Reflectometers, by C.S. Reis, H.C. Poulter, J.K. Hunton Nov-1955, v.7 n.3 Square Wave and Pulse Testing of Linear Systems, by B.M. Oliver Step Function Response of Typical Networks Dec-1955, v.7 n.4 An Enhanced Accuracy High Readability VTVM, by John Zevenbergen Use of the "Notch Wattmeter" with -hp- Signal Generators 1956 Jan-1956, v.7 n.5 New TWT Amplifiers with Provision for Simulating Special Microwave Signals, by Geo. W.C. Mathers, Peter D. Lacy Feb-1956, v.7 n.6 Three New -hp- Audio Oscillators, by Brunton Bauer The -hp- Balanced R-C Oscillator Circuit, by B.M. Oliver March-1956, v.7 n.7 A New DC-300 KC High-Sensitivity Oscilloscope with Triggered Sweep, by Dick Reynolds, Duane Dunwoodie April-1956, v.7 n.8 A New DC-10 MC Oscilloscope with Dual-Trace and High-Gain Preamplifiers, by Robert A. Grimm, Norman B. Schrock Penholder Style Probes, pg 5 May/June-1956, v.7 n.9-10 A New 10-15.5 KMC 10 MW Signal Generator, by Wm. D. Myers A Simple 0-500 Volt Metered Power Supply, by Brunton Bauer Balanced Output from the -hp- Square Wave Generator July/Aug-1956, v.7 n.11-12 A 0-1.1 MC Frequency Counter with Time Interval Markers, by Jeffrey B. Wolfington The -hp- Readout Systems Sept/Oct-1956, v.8 n.1-2 A Micrometric 12-40 KMC Waveguide Slotted Line with Interchangeable Sections and Untuned Probe, by J.K. Hunton Nov/Dec-1956, v.8 n.3-4 A New Adjustable Gate Time Counter from a New -hp- Affiliate New Photo-Electric Tachometry Transducer Dynac, Inc. - A New Service for Specialized Instrumentation Radar Signal Simulators 1957 Jan-1957, v.8 n.5 An RC Oscillator that Covers the 20 cps-20 kc Range in a Single Dial Sweep Design Principles of the 1001:1 Range Single-Band RC Oscillator, by Nicholas Kovalevski, B.M. Oliver Feb-1957, v.8 n.6 A New 8-12 KMC Voltage-Tuned Sweep Oscillator for Faster Microwave Evaluations, by P.D. Lacy, Daniel E. Wheeler Backward Wave Oscillator Tubes March-1957, v.8 n.7 A Fast Digital Recorder with Analog Output for Automatic Data Plotting, by Alan S. Bagley, Ed A. Hilton Operation of the Digital Recorder April-1957, v.8 n.8 A 250 CPS - 100 KC Oscillator For High Stability Applications, by Albert Ennor, Edna MacLean How Model 200T stability Curves were Plotted Higher Accuracy in Measuring Audio and Sub-Audio Frequencies, by Albert Ennor May/June-1957, v.8 n.9-10 A Note on Measuring Coaxial Coupler Directivity, by Howard C. Poulter High DB-Resolution Meter Scales for -hp- VTVM's July-1957, v.8 n-11 A Small, Convenient Frequency Counter For General-Purpose Use, by Frank Koziuk Some Handy uses for the -hp- 650A Test Oscillator, by Arthur Fong August-1957, v.8 n.12 A Rack-Mounting DC-300 KC Oscilloscope With Expandable Sweep, by Duane Dunwoodie, Dick Reynolds Sept/Oct-1957, v.9 n.1-2 Permanent Record and Oscilloscope Techniques with the Microwave Sweep Oscillator, by Peter D. Lacy, Daniel E. Wheeler Supplement to Vol.9 N.1-2 Sputnik's Doppler Shift Measured and Recorded with -hp- Counter and Digital Recorder Nov/Dec-1957, v.9 n.3-4 An Improved Method For Measuring Losses in Short Waveguide Lengths, by Peter D. Lacy, Kenneth E. Miller Derivation of Waveguide Small-Loss Equation, pg 3 How Doppler Shift Records Provide Satellite Range and Height Data, pg 5 1958 Jan-1958, v.9 n.5 An Automatic Noise Figure Meter For Improving Microwave Device Performance, by Howard C. Poulter Principle of Operation, pg 2 Noise Figure and Its Measurement, by B.M. Oliver, pg 3 Feb-1958, V.9 n.6 Increased Operational Simplicity In a New DC-Several Hundred KC Oscilloscope, by Duane Dunwoodie New -hp- R & D Divisions March-1958, v.9 n.7 An Increased-Sensitivity Micro Volt-Ammeter Using a Photoconductive Chopper, by John M. Cage April-1958, v.9 n.8 A Precision Delayed-Pulse Generator For Measuring and Generating Short Time Intervals, by Marvin Willrodt, Don Broderick, Dexter Hartke Other Measurements with the Delayed-Pulse Generator, pg 3 May-1958, v.9 n.9 A Fast, Automatic Printer for Digital Type Data Devices, by Ed A. Hilton SEPERATE PRINTER MECHANISM A Current-Limiting Regulated Power Supply for Transistor Work, by Donald F. Schulz June/July-1958, v.9 n.10-11 A Clip-On DC Milliammeter for Measuring Tube and Transistor Circuit Currents, by Arndt Bergh, George S. Kan, Charles O. Forge -hp- Board of Directors Enlarged August-1958, v.9 n.12 An Automatic DC to X-Band Power Meter for the Medium Power Range, by B.P. Hand Sept/Oct-1958, v.10 n.1-2 A Dual-Trace Automatic Base Line Oscilloscope for the DC-Several Hundred KC Range, by John Strathman Two High-Performance Attenuators For the DC-500 MC Range, by Arthur Fong, Harley L. Halverson Nov/Dec-1958, v.10 n.3-4 5x10-8/Week Time Base Accuracy in the 10 MC Frequency Counter, by Leonard S. Cutler, LaThare N. Bodily New Readout Features in the New Counter, pg 4 Assuring Time Base Performance, pg 5 1959 Jan-1959, v.10 n.5 A New Digital DC Voltmeter with Automatic Range and Polarity Selection, by Theodore C. Anderson, Noel M. Pace Feb/March-1959, v.10 n.6-7 Additional Conveniences for Noise Figure Measurements, by Marco R. Negrete April-1959, v.10 n.8 Special-Purpose Performance in a General-Purpose 50 KC-65 MC Signal Generator, by Arthur Fong Gaither Elected to -hp- Board of Directors, pg 6 Friis becomes Consultant, pg 6 May/June-1959, v.10 n.9-10 A Clip-On Oscilloscope Probe for Measuring and Viewing Current Waveforms, by Robert R. Wilke July/August-1959, v.10 n.11-12 A Precision DC Vacuum-Tube Voltmeter with Extended Sensitivity and High Stability, by Donald Norgaard Sept/Oct-1959, v.11 n.1-2 A New 20 CPS-50 KC Wave Analyzer with high Selectivity and Simplified Tuning, by J.R. Petrak Measuring Microwave Tube Electrode Coefficients with an Audio Wave Analyzer, by Harley L. Halverson, pg 5 Nov/Dec-1959, v.11 n.3-4 A New Clock for Improving the Accuracy of Local Frequency and Time Standards, by Dexter Hartke 1960 Jan/March-1960, v.11 n.5-7 A Versatile New DC-500 MC Oscilloscope with High Sensitivity and Dual Channel Display, by Roderick Carlson High-Speed Effect in Solid-State Diodes Explained with New Oscilloscope, pg 3 Permanent X-Y Recordings of Displayed Signals, pg 7 April/June-1960, v.11 n.8-10 The Effect of u-Circuit Non-Linearity on the Amplitude Stability of RC Oscillators, by Bernard M. Oliver Utilizing VLF Standard Broadcasts with the -hp- Frequency Divider and Clock, pg 8 De Gaulle Visits -hp- Plant, pg 3 July/August-1960, v.11 n.11-12 A New Clip-on Oscilloscope/Voltmeter Probe for 25 - 20 MC Current Measurements, by Charles O. Forge The Value of AC Current Measurements, pg 5 Sept-1960, v.12 n.1 A New RF Millivoltmeter for Convenient Measurements to 1 Kmc, by Theodore C. Anderson Oct-1960, v.12 n.2 A Voltage-to-Frequency Converter for Greater Flexibility in Data Handling, by R.A. Andersen DYMEC--An -hp- Service for Special Instrumentation Situations, pg 3 Nov-1960, v.12 n.3 A New Frequency/Time Standard with 5 x 10-10 Day Stability, by Leonard S. Cutler Dec-1960, v.12 n.4 Improved Sweep Frequency Techniques for Broadband Microwave Testing, by Elmer Lorence, J.K. Hunton 1961 Jan-1961, v.12 n.5 A New Frequency Counter Plug-In Unit for Direct Frequency Measurements to 510 MC Two New Microwave Frequency Doublers for Extending Signal Sources to the 18-40 KMC Range, pg 3 Feb-1961, v.12 n.6 Two Versatile new Power Supplies for High Power Semiconductor Work, by E. Robert Aikin March-1961, v.12 n.7 Increased Accuracy in -hp- Meters Through Servo Calibrating Methods, by Bernard M. Oliver April-1961, v.12 n.8 Two New Militarized Oscilloscopes Having Both Horizontal and Vertical Plug-Ins, by George F. Fredrick Vertical Plug-Ins, pg 6 May-1961, v.12 n.9 Two New Transistorized Frequency Counters with Increased Readout and Low-Frequency Capabilities Digital or Analog Recording of Counter Measurements, pg 5 June-1961, v.12 n.10 A Microwave Power Meter with a Hundredfold Reduction of Thermal Drift, by R.F. Pramann A New Low-Cost DC Fan for Cabinet Cooling July/August-1961, v.12 n.11-12 A Parallax-Free No-Glare CRT for -hp- Oscilloscopes, by Bertrand W. Squier, Jr. A New DC-450 KC Oscilloscope using the Internal-Graticule CRT Sept/Oct-1961, v.13 n.1-2 A New SWR Meter with High Gain-Stability, by Darwin L. Howard Nov/Dec-1961, v.13 n.3-4 Broader Information Capabilities in the Clip-On DC Milliammeter, by Donald E. Barkley, Arndt Bergh LARGE-APERTURE CLIP-ON PROBE, pg 3 MAGNETIC INK TESTING, pg 4 An Instrument for Automatically Measuring Frequencies from 200 Mc to 12.4 GC, pg 5 1962 Jan-1962, v.13 n.5 The Transistorized RC Oscillator, by David S. Cochran New One Watt TWT Amplifiers for more rapid Microwave Measurements, by George W.C. Mathers, pg 4-6 Feb-1962, v.13 n.6 A New Digital Voltmeter Having High Rejection of Hum and Noise, by R.A. Andersen A Versatile Digital Recorder for BCD Data, by Ed A. Hilton, pg 5 A Digital-to-Analog Converter with High Output Resolution, by Ed A. Hilton, pg 7 March-1962, v.13 n.7 A New Scope Plug-In for Convenient Measuring of Fast Switching Times, by Kay B. Magleby The Kilomegacycle Sampling Oscilloscope, by Roderick Carlson, pg 4 Principles of the Sampling Techniques, pg 4 A Digital System for Automatic Measurements of Switching Times, by H.C. Stansch, pg 6 April-1962, v.13 n.8 A New 50 MC Oscilloscope Based on an Advanced CRT Design, by Floyd C. Siegel Vertical Plug-Ins, pg 4 Horizontal Plug-Ins, pg 5 SPECIFICATIONS HORIZONTAL PLUG-INS, pg 7 SPECIFICATIONS -hp- MODEL 175A OSCILLOSCOPE, pg 8 SPECIFICATIONS VERTICAL PLUG-INS, pg 8 May/June-1962, v.13 n.9-10 A Phase-Locking Synchronizer for Stabilizing Reflex Klystroms, by Albert Benjaminson A New Wide-Application Klystron Power Supply, by Robert C. Allan, pg 5 An Oscilloscope Camera with "Black Light" Graticule Illumination, by James A. Chesebrough, pg 8 July-1962, v.13 n.11 The Present Attainments of Adjustable Power Supplies REPRESENTATIVE LIST OF HARRISON POWER SUPPLIES, pg 8 August-1962, v.13 n.12 A DC-500 KC Oscilloscope with Extended Measurement Capabilities, by John Strathman Sept-1962, v.14 n.1 A New Generation of High-Speed Frequency Counters, by Tracy S. Storer, Charles M. Hill Counter Plug-ins, pg 4 HIGH-READABILITY DISPLAY, pg 8 Oct-1962, v.14 n.2 A New Pulse Generator with Very Fast Rise Time, by Charles O. Forge Measuring Small, Stray L and C with Nanosecond Pulses, by Charles O. Forge, pg 6 Nov/Dec-1962, v.14 n.3-4 A Solid-State Operational Amplifier of High Stability, by Robert J. Strehlow Amplifier Plug-Ins, pg 3 A Portable Frequency-Response Test Set, by Don A. Wick, pg 6 1963 Jan/Feb-1963, v.14 n.5-6 A Versatile Wave Analyzer for the 1 kc to 1.5 Mc Range, by Stanley McCarthy A Quick, Convenient Method for Measuring Loop Gain, by Philip Spohn, pg 5 March/April-1963, v.14 n.7-8 A New Microwave Modulator, by Nicholas J. Kuhn A Convenient Probe for Sensing Magnetic Fields, by Arndt Bergh, pg 7 Using the Smith Chart with Negative Real-part Impedances or Admittances, by Harley L. Halverson, Luiz Peregrino, pg 8 New Submultiple Prefixes, pg 8 May/June-1963, v.14 n.9-10 A New Multi-Function Voltmeter for General Laboratory Use, by Paul G. Baird A Guarded Amplifier for Increasing Digital Voltmeter Sensitivity, by Donald H. Jenkins, pg 6 July-1963, v.14 n.11 An 800-2400 MC Signal Generator with Automatically-Leveled Output Power, by James R. Ferrell A Variable-Frequency AC Power Supply for General-Purpose Testing, by Duane P. Lingafelter, pg 6 August-1963, v.14 n.12 A Wide-Range RC Oscillator with Push-button Frequency Selection, by Robert W. Colpitts Special Push-Button Audio Oscillator for Telephone Testing, by Robert W. Colpitts, pg 6 A Tunnel-Diode Pulse Generator with 0.1 Nanosecond Risetime, by Roderick Carlson, pg 7 VISIT -hp- AT WESCON, pg 8 Sept-1963, v.15 n.1 A Basic New Wide-Band Oscilloscope with Planned Anti-Obsolescene, by Richard E. Monnier The Time Domain Reflectometer, by Lee R. Moffitt, pg 6-7 The Radial Field Cathode-ray Tube, pg 7 Amplifier Plug-ins, pg 8-9 Sweep Generator Plug-Ins, pg 10-12 Oct-1963, v.15 n.2 A General-Purpose Pulse Generator Producing High-Power, Fast-Rise Pulses, by Johan Blokker, George Kan A Clip-on Current Probe for Wide-band Oscilloscope Measurements, by John G. Tatum, pg 5 NBS Inagurates Higher Power VLF Standard Frequency Broadcasts, pg 8 Nov-1963, v.15 n.3 A new Multi-Purpose Digital Voltmeter, by Charles W. Near, David S. Cochran A New Coaxial Crystal Detector with Extremely Flat Frequency Response, by Russell B. Riley, page 8 Voltmeter Plug-ins, pg 3 APPENDIX Tangential Sensitivity of the Model 423A Detector, pg 7 Dec-1963, v.15 n.4 A New Series of Microwave Sweep Oscillators with Flexible Modulation and Leveling, by Robert L. Dudley Examination of the Atomic Spectral Lines of a Cesium Beam Tube with the -hp- Frequency Synthesizer, by Leonard S. Cutler, pg 8 1964 Jan-1964, v.15 n.5 An RMS-Responding Voltmeter with High Crest Factor Rating, by Gregory Justice The Significance of Crest Factor, pg 4 Long-term Stability of the -hp- 130C Sensitive DC-500 KC Oscilloscope, by John Strathman, pg 6-7 Precision of the United States Frequency Standard, pg 7 -hp- Factory Training Seminars, pg 8 Feb-1964, v.15 n.6 Time Domain Reflectometry, by B. M. Oliver Time Domain Reflectometry with a Plug-in for the 140A Oscilloscope, pg 8 TDR with -hp- Sampling Scopes, pg 8 March-1964, v.15 n.7 Broadband, Solid-state Amplifiers, by Alfred F. Gort Modifications in NBO Standard Frequency and Time Broadcasts, pg 4 An Air-Bearing Spindle for Highly Precise Machining, by Edward H. Phillips, pg 5-7 International System of Units, pg 8 April-1964, v.15 n.8 A new Instrument for Measuring Microwave Frequencies with Counter Accuracy, by Rudolph F. Pasos A New DC-4000 MC Sampling 'Scope Plug-In with Signal Feed-Through Capability, by Wayne M. Grove, pg 5-8 May-1964, v.15 n.9 A 0-50 Mc Frequency Synthesizer with Excellent Stability, Fast Switching, and Fine Resolution, by Victor E. Van Duzer Notes on the Application of Frequency Synthesizers, by Victor E. Van Duzer, pg 7 Digital Frequency Synthesis, by Bernard M. Oliver June-1964, v.15 n.10 Precision Plug-In Frequency Measurements to 3000 Mc, by Charles M. Hill Changes in Standard Broadcasts, pg 5 A New Oscilloscope Plug-In with Four 40-MC Channels, by James R. Pettit, pg 6-8 July-1964, v.15 n.11 A New Performance of the "Flying Clock" Experiment, by Leonard S. Cutler, Alan S. Bagley A Measurement of the Ratio of the Zero-Field Hyperfine Splittings of Cesium 133 and Hydrogen, by Leonard S. Cutler, pg 6-7 Plant Distribution of a One-Volt DC Standard, by Richard Bean, pg 9-12 August-1964, v.15 n.12 A New Microwave Spectrum Analyzer, by Harley L. Halverson EMC/RFI, pg 5 Broad Spectrum Displays, pg 7 Spectrum Surveillance, pg 8 Sept-1964, v.16 n.1 Our Preparations at Hewlett-Packard for the Instrumentation of Tomorrow, by Frank J. Burkhard Oct-1964, v.16 n.2 A VLF Comparator for Relating Local Frequency to U.s. Standards, by Dexter Hartke Frequency Calibration using LF Standard Broadcasts, pg 2 Tunable VLF Comparator, pg 8 Nov-1964, v.16 n.3 Absorption Modulators for Simple or Complex Microwave Modulation, by Douglas A. Gray New Microwave Signal Sources with Signal Generator Capabilities, by Douglas A. Gray, pg 8 Dec-1964, v.16 n.4 Microwave Harmonic Generation and Nanosecond Pulse Generation with the Step-recovery Diode, by Robert D. Hall, Stewart M. Krakauer 1965 Jan-1965, v.16 n.5 A new Instrumentation-Class Tape Transport of Simplified Design, by Walter T. Selsted New Tape Transport in Sanborn Magnetic Data Recording Systems, pg 3 Bernard Oliver elected IEEE President, pg 5 Senior Staff Engineers Appointed by -hp- Board of Directors, pg 8 Feb-1965, v.16 n.6 New Coaxial Couplers for Reflectometers, Detection, and Monitoring...coaxial couplers with flattened response and high directivity facilitate swept-type measurements of several kinds, by Robert Prickett New Waveguide Crystal Detectors with Flat Response, by Robert Prickett and Lawrence Renihan, pg 6 Atomic Time Adopted for WWVB, pg 8 March-1965, v.16 n.7 The Linear Quartz Termometer - a New Tool for Measuring Absolute and Difference Temperatures...a linear-temperature-coefficient quartz resonator has been developed, leading to a fast, wide-range thermometer with a resolution of .0001 C., by Albert Benjaminson The Linear Coefficient Quartz Resonator, by Donald L. Hammond, pg 3 The Influence of Transistory Parameters on Transistor Noise Performance - A Simplified Presentation - the data illustrates the magnitude of the noise parameters and their variation with operating point, by Rolly Hassun, Michael C. Swiontek, pg 8-12 April-1965, v.16 n.8 Correlating Time from Europe to Asia with Flying Clocks...by means of portable cesium-beam clocks, time has been correlated to 1 microsecond at many of the world's timekeeping centers and a comparison of four of the world's best-known 'long-beam' frequency standards has also been made, by LaThare N. Bodily May-1965, v.16 n.9 A Combined DC Voltage Standard and Differential Voltmeter for Precise Calibration Work...an advanced instrument that generates precise, high-resolution dc voltages for calibration work is also a precision differential dc voltmeter with a constant and very high input impedance, by Robert E. Watson Phase Comparisons with LF Standard Broadcasts Controlled by 'Atomic Time' June-1965, v.16 n.10 A New 10c/s-10Mc/s Test Oscillator with Enhanced Output Capabilities...the performance possible with state-of-art techniques has been incorporated in a general-purpose test oscillator, by Myles A. Judd A Low-Distortion Amplifier Supplyign 10 Watts Peak from DC to Beyond 1 Mc/s...a new amplifier has sufficient bandwidth to enable it to serve at dc or RF and sufficient power to be used as an electro-mechanical driver, by Robert J. Strehlow Cyles Per Second and Hertz, by editor July-1965, v.16 n.11 A Low-Frequency Oscillator with Variable-Phase Outputs for Gain-Phase Evaulations...a new l-f oscillator provides both sine and square outputs as well as adjustable-phase sine and square outputs over a range from 60 kc/s down to 0.005 c/s, by Richard Crawford Extraterrestral and Ionospheric Sounding with Synthesized Frequency Sweeps, by G.H. Barry and R.B. Fenwick, pg 8-12 Voltage and TDR Measurements to be Discussed at Wescon/ 65 Technical Session, pg 12 August-1965, v.16 n.12 A Fast-Reading Digital Voltmeter with .005% Accuracy and Integrating Capability...a new Digital Voltmeter of very high accuracy makes readings from less than 100 Vdc to 1000 Vdc at maximum speeds of up to 15 readings per second, by William McCullough Guarded Measurements with a Floating Voltmeter, pg 5 Cable Testing with Time Domain Reflectometry, pg 8 Sept-1965, v.17 n.1 A Precision Analog Voltohmmeter with Automatic Ranging...an automatife analog voltohmmeter simplifies dc voltage and resistance measurements and gives higher measurement accuracy and speed than is usually obtained, by James F. Kistler, pg 2-6 A Simple Method for Recording Fast and Low-Level Waveforms...a recently developed oscilloscope plug-in unit makes fast, convenient records of displayed signals and greatly reduces accompanying noise, by John N. Deans, pg 6-8 Oct-1965, v.17 n.2 A Precision AC-DC Differential Voltmeter/DC Standard with High Versatility...a versatile new instrument measures ac voltages with high accuracy from 20 c/s to 100 kc/s by comparing the unknown to a precision dc voltage. It also measures dc voltages t 0.02% and supplies high-resolution dc voltages, by William G. Smith, pg 2-7 A 200 kc/s - 500 Mc/s Frequency Conversion Unit for Mixing, Modulating, Phase-Detecting and Level-Controlling...a new untuned mixer operatres over the extremely wide frequency range from 200 kc/s to 500 Mc/s and uses a double-balanced circuit for high versatility, by Victor E. Van Duzer, pg 8-11 500 kc/s-500 Mc/s Frequency Doubler, by Victor E. Van Duzer, pg 12 Nov-1965, v.17 n.3 A Voltage-Programmable Low-Frequency Function Generator with Plug-In Versatility...a new generator produces sine, square, and triangular signals as low as 0.01 hertz either unmodulated or with various modulations, by Robert L. Dudley, pg 2-5 The Trigger/Phase-Lock Plug-In...a plug-in for the low-frequency function generator results in a variety of signals in the 0.01 to 100,000 hertz range, by Robert L. Dudley, pg 6-9 NBS Standard Frequency and Time Broadcast Schedule...the diagrams presented here, with explanatory notes, summarize the standard frequency and time services, provided by the National Bureau of Standards radio stations WWV, WWVH, WWVB and WWVL, pg 10 A Technique for Making Ultra-Precise Measurements of Microwave Frequency Stability...standard laboratory instruments are interconnected to provide a system that measures the short-term frequency stability of microwave sources to a precision of better than 1 part in 10, by James A. Marshall, pg 11-12 Dec-1965, v.17 n.4 Cover: Energy Diagram for Schottky Barrier Using the Hot Carrier Diode as a Dectector, by Hans. O. Sorensen, pg 2-5 Using the Hot Carrier Diode as a Microwave Mixer, by Milton Crane, pg 6-8 1966 Jan-1966, v.17 n.5 Cover: Measuring Multi-Layer Liquid Depths with TDR A new High-stability AC Voltmeter with a 10-MHz Frequency Range and 1% Accuracy...a new ac voltmeter with wide frequency coverage and enhanced accuracy is the first of its type to achieve a ground-referenced dc output, by Reid J. Gardner, pg 2-7 Measurement of Liquid Layer Thickness with Time Domain Reflectometry, by James Brockmeier, pg 8 Feb-1966, v.17 n.6 A New TV Waveform Oscilloscope for Precision Measurements of Video Test Signals...for testing TV transmission systems to meet the standards required for color TV, a special wideband oscilloscope has been designed, by Ralph R. Reiser, Richard E. Monnier, pg 2-6 Continuous TV Monitoring with Vertical-Interval Test Signals...a brief description of the signals transmitted in TV channels for continously checking channel quality, by Richard E. Monnier, Ralph R. Reiser, pg 7-10 Correction to Measurement of Liquid Layer Thickness with Time Domain Reflectometry from Jan-1996 The 'VITS' Program for Intercity Television Network Testing, pg 11-12 March-1966, v.17 n.7 Cover: Low-Frequency RFI Measurements A Sensitive, Wide Range DC Null Voltmeter with an Internal Bucking Supply for Zero Loading Error...a floating, high-sensitivity DC Null Meter measures voltages to below 1 microvolt and achieves virtually infinite input impedance with a bucking supply, by Charles D. Platz, pg 2-6 A Portable DC Voltage Standard Providing 10 PPM Transfer Accuracy...a new type of instrument transfers precision dc voltages out of the standards laboratory to working areas, by Robert E. Watson, pg 7-10 RFI Measurements Down to 10 kHz with Spectrum Analyzer Converter, by John Cardoza, pg 11-12 April-1966, v.17 n.8 Cover: 1.5 x 10 Accuracy DC Voltage Divider using New -hp- Standard Resistors A New Distortion Analyzer with Automatic Nulling and Broadened Measurement Capability...a new audio-RF distortion analyzer has been designed which, when roughly pre-tuned, tracks the signal to be measured and automatically nulls the fundamental frequency allowing for a more consistent measurement and also over a wider frequency range, by Charles R. Moore, pg 2-7 Total Harmonic Distortion Measurements, pg 3 An Adjustable Standard Resistor with Improved Accuracy and High Stability...a new standard resistor designed in the -hp- Standards Laboratory ca be set to within .015 ppm of nominal, substantially facilitating precision calibration work, by E. Paul Hubbs, pg 8-14 Stability of Capaacitively-Loaded Emitter Followers - a Simplified Approach...the following analysis shows that simple adjustment in bias current will often stabilize the circuit, by Glen B. DeBella, pg 15-16 May-1966, v.17 n.9 Cover: Measurements made with a single new wide-range instrument: The Vector Voltmeter The RF Vector Voltmeter - An Important New Instrument for Amplitude and Phase Measurements from 1 MHz to 1000 MHz...a broadband two-channel millivoltmeter and phasemeter simplifies many measurements heretofore often neglected, by Fritz K. Weinert, pg 2-9 The Vector Voltmeter as a Precision Frequency Comparator, pg 7 Selected Vector Voltmeter Measurements, pg 10-12 A Portable Battery-Powered Multi-Function Meter with Lab-Quality Performance...a fully-portable laboratory instrument is useful from 1 hertz to 4 megahertz at levels to below 1 millivolt, by James M. Colwell, pg 13-16 Time Signal Adjustment Correction To: 'RFI Measurements Down to 10 Khz with Spectrum Analyzer Converter' from March 1966 June-1966, v.17 n.10 An Advanced New DC-25 MHz Oscilloscope for Programmed Production Testing...a new oscilloscope has the special capability of maintaining its dc baseline without drift which leads to higher dc accuracy and the important characteristic of being programmable, by John Strathman, pg 2-7 Eliminating DC Drift, pg 4 Time Domain Reflectometry in 75-OHM Systems, by Charles A. Donaldson, pg 9 Rise Time Converters for Simpler TDR Testing of Band-Limited Systems, by Lee R. Moffitt, pg 10-11 A Calibrated Susceptance for TDR Measurements of Small Reactive Discontinuities, by Richard W. Anderson, pg 12-13 New TDR Application Note, pg 13 A DC-Stabilized Oscilloscope Plug-In with 50 - V/CM Sensitivity...freedom from dc drift overcomes one of the most troublesome effects in making oscilloscope measurements of transducer output and other small signals, by James R. Pettit, pg 14-16 July-1966, v.17 n.11 A Sensitive new 1-GHz Sampling Voltmeter with Unusual Capabilities...a voltmeter operating on the principle of incoherent sampling measures over wide frequency and voltage ranges while providing an output usable for signal analysis, by Fred W. Wenninger, Jr., pg 2-8 Coherent and Incoherent Sampling, pg 4 Measuring Attenuation, SWR, and Substitution Loss with a Low-Noise, High-Precision SWR Meter...effects of noise and other factors are presented for an improved SWR Meter used with crystal and bolometer type detectors, by Bradford G. Woolley, pg 9-13 Increasing Instrument Sensitivity with a Low-Noise Preamplifier...a guide to a number of applications in which measurements are simplified by a low-noise wide-band amplifier, by Robert B. Bump, pg 14-16 August-1966, v.17 n.12 A New DC-50+ MHz Transistorized Oscilloscope of Basic Instrumentation Character...a small-size portable oscillscope with negligible trace drift and using plug-ins has been designed as the keystone of a complete oscilloscope system, by Floyd G. Siegel, pg 2-11 Short, Large Screen, High-Frequency CRT, pg 4 Compact, Wideband, Stripline Delay Line, pg 7 Electronically-controlled Oscilloscope Camera, pg 10 World-wide Time Synchronization, 1966...time scales maintained at the world's time-keeping center have been correlated with new levels of precision in the latest around-the-world flying clock experiment, by LaThare N. Bodily, Ronald C. Hyatt, Dexter Hartke, pg 13-20 First Cesium-beam Resonator, pg 17 The Benchmark, pg 20 Sept-1966 A New Universal Impedance Bridge with Simplified, Semi-Automatic Tuning...by using feedback to adjust one bridge element automatically, a bridge requiring only one balancing control is achieved, by Katsumi Yoshimoto, pg 2-5 A System for Automatic Control of the `DQ Resistor in an Impedance Bridge, by Hitoshi Noguchi, Haruo Itoh, Katsumi Yoshimoto, pg 6-9 Appendix, AC Bridge Loci, by Hitoshi Noguchi, pg 10 A Plug-in Unit for Extending Counter-Type Frequency Measurements to 12.4 GHz, by John N. Dukes, pg 11-13 New FCC Rules for FM Stereo Frequency Control, pg 14 A Frequency Comb Generator with a Range from 1 MHz to Beyond 5 GHz, by Roderick Carlson, pg 15-20 Accurate Determination of a Signal Frequency on a Spectrum Analyzer, pg 17 Oct-1966 Cover: Cutaway view of major new 12 GHz Sampling Device An Ultra-Wideband Oscilloscope Based on an Advanced Sampling Device...the state of the oscilloscope art has taken a significant forward step with the development of a new oscilloscope that operates from DC to 12.4 GHz and displays signals as small as 1 millivolt, by Darwin L. Howard, Allan I. Best, James M. Umphrey, pg 2-7 Ultra-fast Triggering and Ultra-Resolution TDR, pg 9-10 Second Symposium on Test Instrumentation, pg 11 New NBS Laboratories, pg 11 A DC to 12.4 GHz Feedthrough Sampler for Oscilloscopes and Other RF Systems...an important circuit development in the form of an ultra-wideband sampling device is leading to major new capabilities in electronic instrumentation, by Wayne M. Grove, pg 12-15 A Summary of Some Performance Characteristics of a Large Sample of Cesium-Beam Frequency Standards, by LaThare N. Bodily, pg 16-19 Operation of the Portable Cesium-beam Frequency Standard, pg 19-20 Frequency Standards in the Omega Navigation System, pg 20 Nov-1966 Cover: A Precision DC Differential Voltmeter and Ratiometer A Simplified DC Differential Voltmeter and Ratiometer for High-Precision Measurements...an easy-to-use dc differential voltmeter measures dc voltages from 1 microvolt to 1100 volts with a resolution of 0.2 microvolt and with high accuracy. This instrument is also a precision ratiometer for comparing two dc voltages, by Lawrence J. Lopp, Jr., pg 2-7 Using the DC Differential Voltmeteratiometer to Construct a 100:1 Precision Divider, pg 6 ADAC-An Automatic System for Measuring Hall Effect in Semiconductors...one of the barriers to detailed materials analysis has been the large effort involved in data acquisition and reduction. This has been greatly reduced in the -hp- laboratories by a system called ADAC. New information on the electronic transport properties of InAs has been one of the first benefits of the system, by Egon Loebner, T. J. Diesel, Cristy M. Schade, pg 9-14 Analysis of Solids with more than one type of Carrier, pg 11 Typical ADAC Data Reduction Procedure, pg 13 A Study of Indium Arsenide using ADAC Equipment, pg 15-16 Dec-1966 Cover: Tape Recorder Heads being aligned under microscope A new High-Performance 1.5 MHz Tape Recorder...a new instrumentation-quality tape recorder has been designed around a current-rather than voltage-sensing input amplifier. Decreased noise and wider bandwidth are direct benefits of this approach, by Gerald L. Ainsworth, pg 2-7 Magnetic Tape Recording and Reproducing, pg 4 Square Wave Response of The HP Model 3950 Magnetic Tape Recording System, pg 6 A Current Preamplifier for Magnetic Tape Playback Systems, by Arndt B. Bergh, pg 8-9 Wideband Cavity-type Coaxial Frequency Meters...a discussion of the construction used to achieve the broad frequency range of the -hp- microwave cavity wavemeter, by Anthony S. Badger, Stephen F. Adam, pg 10-12 Simplified Technique for Evaluating Diode RF Performance, by Bernard Levine, pg 13 Swept-Frequency SWR Measurements in Coaxial Systems...an important new swept-frequency technique permits quick and accurate measurements of SWR in coaxial systems up to 18 GHz, by Stephen J. Adam, pg 14-20 1967 Jan-1967 Cover: Rapid, Direct Measurement of Complex Impedance in a Circuit Methods of Measuring Impedance...a review of some important systems for measuring the impedance of devices and circuits, by Charles G. Gorss, pg 2-11 Some Basic Formulas Involving Q, pg 8 Comparison of Some Impedance Measuring Systems, pg 10 Direct-Reading, Fully-Automatic Vector Impedance Meters...two new instruments designed to measure impedance magnitude and phase angle quickly and easily over a braod frequency range, by Gerald J. Alonzo, Hirsh V. Marantz, Richard H. Blackwell, pg 12-20 Design Philosophy of Vector Impedance Meters, pg 15 Feb-1967 An Advanced new Network Analyzer for Sweep-measuring Amplitude from 0.1 to 12.4 GHz, by Orthell T. Dennison, Richard W. Anderson, pg 2-10 The Engineer, Automated Network Analysis and the Computer-Signs of Things to Come, by Paul C. Ely, Jr., pg 11-12 S-Parameter Techniques for Faster, More Accurate Network Design, by Richard W. Anderson, pg 13-22 Useful Scattering Parameter Relationships, pg 23-24 March-1967 Cover: Plug-in logic board from the new -hp- Model 2116A Instrumentation Computer A Computer for Instrumentation Systems...problems of interconnection, programming and environment arise in the design of systems containing both computers and instruments. They are solved in advance by this new integrated-circuit computer, by Kay B. Magleby, pg 2-10 Successful Instrument-Computer Marriages...Instrumentation computers are designed to be easy to incorporate into any system which contains electronic, chemical or medical instruments. Here are four remarkably varied examples of how these computers are being used, pg 11-12 A Wideband Analog Frequency Meter and FM Discriminator, by Peter R. Roth, pg 13-18 Phase Noise and Phase Modulation Measurements with the Analog Frequency Meter, by Peter R. Roth, pg 18-20 Correction to "S-parameter Techniques for Faster, More Accurate Network Design" February 1967, pg 8 April-1967 Cover: Measuring the Ocean's Temperature Frequency Divider Extends Automatic Digital Frequency Measurements to 12.4 GHz...this sophisticated instrument lets an electronic counter measure microwave frequencies while retained the accuracy and simplicity of the counter, by Robert L. Allen, pg 2-8 Frequency Divider + Integrated-circuit Counter = 12.4 GHz Digital Frequency Meter, pg 5 Precision Measurement of Ocean Temperatures...as ocean research becomes more sophisticated, greater precision in temperature measurement is needed, by Albert Benjaminson, pg 8-12 Temperature Profile of the Ocean, pg 11 Improved Intermodulation Rejection in Mixers...intermodulation distortion, always a problem in mixer design, can be largely prevented by a careful choice of bias and power levels, by Jack H. Lepoff, A. Michael Cowley, pg 13-16 May-1967 Cover: Locating Gas Leaks Ultrasonically Pinpointing Industrial Defects with Ultrasonic Ears...gas leaks, corona, and other defects in industrial equipment can be located quickly by zeroing in on their high-frequency sounds. Ultrasonic translators allow men to hear and follow these normally inaudible sounds, by Robert L. Allen, pg 2-10 How to Recover Weak Signals Buried in Noise...a new phase-lock synchronous detector enables this ac microvoltmeter to lock on to signals obscured by noise, by Raymond C. Hanson, pg 11-15 Typical Applications of -hp- Model 3410A, pg 12-14 Using a Precision AC Amplifier for Measurement and Calibration...good gain accuracy and low distortion in a genral purpose amplifier make it possible to extend the range of many instruments, by Rex James, pg 16-20 How the -hp- Model 463A Amplifier is Calibrated, pg 19 June-1967 Cover: Electronic Monitoring of Hospital Patients The Role of Electronic Medical Instrumentation in Patient Monitoring, by H. Ronald Riggert, pg 2-11 Precision Thin-Film Coaxial Attenuators...semi-automated thin-film techniques yield attenuators that are execeptionally precise and wideband (dc to 18 GHz), yet so economical that they can logically be used even in non-critical applications, by Stephen F. Adam, pg 12-19 International Units, Multiple and Submultiple Prefixes, pg 20 July-1967 Cover: Model 7848A Ink Recorder being subjected to a programmed life test designed to check its reliability Pressurized Ink Recording on Z-Fold Strip Charts...a pressure-modulated inking system and contactless pen-tip position feedback are two of myany innovations in this new eight-channel recorder, by Robert A. Sanderson, pg 2-12 Advantages of Direct-coupled Differential Data Amplifiers, by Morton H. Levin, pg 13-16 Errors in Data Amplifier Systems...possible error sources in a data amplifier system and how they affect the choice of an amplifier, by Richard Y. Moss, II, pg 17-20 August-1967 Cover: New step-and-repeat camera using the laser interferometer method of controlling mechanical positioning to high orders of accuracy Implementing Integrated Circuits in HP Instrumentation...some of the problem areas that Hewlett-Packard considered before introducing integrated circuits into instrumentation, by Max J. Schuller, Ian T. Band, Ed A. Hilton, pg 2-4 High-Accuracy Laser-Interferometer Camera for IC Masks, by Don M. Cross, pg 5-8 Integrated-Circuit Counters...here is a designer-eye view of the impact of untegrated circuits on electronic counters. Two new IC counters are described, by John W. McMains, Thomas P. O'Brien, pg 9-13 Semiautomatic System for Production Testing of Electronics Circuits, by Emil E. Olander, Jr., Dee L. Larson, pg 14-20 Sept-1967 Cover: Model 180A Oscilloscope displays a portion of pseudo-random Gaussian noise pattern generated by Model 3722A Noise Generator. Top instrument is a display unit from new HP Model 5400A Multi-Channel Analyzer Pseudo-Random and Random Test Signals...using digital techniques, this precision low-frequency noise generator can synthesize repeatable, controllable, pseudo-random noise patterns as well as truly random noise, by Gordon T. Roberts, Brian W. Finnie, George C. Anderson, pg 2-17 Testing with Pseudo-Random and Random Noise...pseudo-random noise is faster, more accurate, and more versatile than random noise in most measurement situations, pg 18-20 Oct-1967 A System for Measuring the Thermal Resistance of Semiconductor Diodes...a fast, automatic system for accurately measuring junction-to-case thermal resistance of semiconductor diodes, by Norman R. Galassi, Bernard S. Siegal, pg 2-9 Digital Frequency Synthesizer Covering 0.1 MHz to 500 MHz in 0.1 Hz Steps, by Alexander Tykulsky, pg 10-13 Phase Noise in Frequency Synthesizers, by Al Tykulsky, Bob Maldewin, pg 14-16 Transform Methods for Linear Systems, by Michael O'Flynn, pg 17-20 Nov-1967 Loudness Evaluation...effective noise abatement calls for instruments that can measure loudness but loudness is subjective, and instruments aren't like people, by Wolfgang E. Ohme, pg 2-11 Automatic Loudness Analysis...Measuring the subjective sensation of loudness is easy if you have one of these calibrated electronic ears, by Heinz Blasser, Helmut Finckh, pg 12-120 Loudness Analyzer aids Noise Reduction, Production Testing, Speech Analysis, pg 15 Dec-1967 Cover: HP glass technician is preparing to make the neck seal of the gun to the envelope of the Model 1300A large-screen CRT Large-Screen High-Frequency X-Y-Z Display...Expanded-mesh CRT's have made possible a bright 8 by 10 inch display with bandwidths greater than 20 MHz, by Charles House, pg 2-9 Repeatability and Settling Time, pg 5 Factors in Designing a Large-Screen, Wideband CRT, by Milton E. Russell, pg 10-11 "Flying Clock" Comparisons Extended to East Europe, Africa and Australia...using portable atomic clocks, HP teams recently brought precise time and frequency information to 18 countries, by LaThare N. Bodily, Ronald C. Hyatt, pg 12-20 Flying Clocks, pg 17 1968 Jan-1968 Cover: Wideband capabilities of the Model 675A Sweep Generator are dramatized in this "fisheye" lens photo. Three and One-Half Decades in One Clean Sweep...new high-accuracu sweep generator covers 10 kHz to 32 MHz in one range with low residual FM, by Robert B. Bump, Myles A. Judd, pg 2-6 Advances in Spectrum Analysis...a new preselector, variable persistence with storage, better sensitivity, and flatter fequency response make spectrum analysis considerably easier and more powerful, by John J. Dupre, John R. Page, Jr., Richard C. Keiter, pg 7-16 How a YIG Filter works, pg 9 Feb-1968 Cover: Geometric distortion of new HP Television Picture Monitor is measured according to IEEE Standards A Precision Solid-state Television Picture Monitor...controlling broadcast picture quality and producing high-resolution distortion-free, closed-circuit-TV displays are jobs for a precision instrument, like this advanced new TV picture monitor, by John R. Hefele, pg 2-8 Measuring Spot Size and Interface Factor, pg 4 Counting CW and Pulsed RF Frequencies to 18 GHz...a new frequency converter plug-in and a new transfer oscillator plug-in put frequencies as high as 18 GHz within the reach of electronic counters. Details of the new transfer oscillator and how to make CW, pulsed RF, and FM measurements with it are given in this article, by Glenn B. DeBella, pg 9-15 Frequency Converter, Transfer Oscillator, or Both? , pg 11 Atomic Second Adopted by International Conference, pg 16 March-1968 Cover: Gamma ray spectroscopy system displays counts vs. energy spectrum of isotope Electronic Techniques in Gamma Ray Spectroscopy and Timing, by Tracy S. Storer, pg 2-10 A Multichannel Pulse-Height Analyzer with a Very Fast Analog-Digital Converter, by W. A. Ross, pg 11-15 Differential Linearity, pg 13 A Charge-Sensitive Preamplifier for Nuclear Work, by James K. Koch, pg 16-18 A Nuclear-Type Linear Amplifier with Plug-In Pulse-Shaping Delay Lines, by Eric M. Ingman, pg 19-21 NIM Bin, pg 21 A Single-Channel Analyzer with Fast Multiple-Pulse Resolution, by Robert G. Wagstrom, pg 22-24 April-1968 Cover: Dots representing sample values of human brain waves, displayed on the CRT of the new HP Model 5480A Signal Averager What is Signal Averaging?...repetitive waveforms buried in noise can often be pulled out by a signal averager, an instrument that takes advantage of the redundant information provided by repetition, by Charles R. Trimble, pg 2-7 Calibrated Real-time Signal Averaging...the first two plug-ins for this new digital signal analyzer make it a versatile signal averager. Novel averaging algorithms provide a stable, calibrated display of the average at all times and even allow the averager to follow slowly changing signals, by Charles R. Trimble, J. Evan Deardorff, pg 8-13 Where Averaging Helps, pg 9 Off-line Analysis of Averaged Data...this new input/output coupler makes the new HP signal averager compatible with a computer and peripheral equipment, by Francis J. Yockey, pg 14-16 May-1968 Cover: The new HP Model 181A Variable Persistence Oscilloscope displaying the responses of a 5 kHz bandpass filter when swept by the HP Model 3300A Function Generator and its new HP Model 3305A Sweep Plug-in. Sweeping Four Decades at Low Frequencies...using an interesting current and capacitor switching technique, a new precision sweep plug-in provides broadband logarithmic sweep for testing low-frequency devices, by William T. Cowan, pg 2-7 Applications of Low-frequency Sweepers, pg 8-9 Easier and Brighter Display of High-Frequency Signals...variable persistence and storage added to a high-frequency oscilloscope increase measurement versatility, by Charles A. Donaldson, Charles A. Gustafson, pg 10-15 Stanford Scientists Study Space Signals...signal averager pulls pulsar signals out of noise for real time display on CRT, by Laurence D. Shergalis, 16 June-1968 Cover: Oscilloscope photos demonstrate the transient-free switching of frequency and voltage ranges of the HP Model 745A AC Calibrator. High-Accuracy AC Voltage Calibration...many techniques are available to calibrate ac instruments, but the venerable thermal transfer method is still the best, by Fred L. Hanson, pg 2-8 Effects of Distortion on Calibration, pg 6 Systems-Oriented Digital Power Sources...designed specifically to be programmed by a computer, this new digital power supply is tailor-made for automatic test systems, by Brett M. Nordgren, pg 9-16 Digital Voltage Sources at Work, pg 14 July-1968 Cover: A mobile teleprinter terminal with a telephone acoustic coupler brings a computer into the lab area A Practical Time-Shared Computer System...using conversational BASIC, a new 16-terminal systems doesn't try to do everything for everyone, but still satisfies nearly all the user's needs, by Thomas C. Poulter, Jr, pg 2-7 A Rubidium-Vapor Frequency Standard for Systems Requiring Superior Frequency Stability, by Darwin H. Throne, pg 8-14 Comparing Frequency Standards, pg 15-16 August-1968 Cover: Model 8552A/8553L Spectrum Analyzer and Model 8601A Generator/Sweeper. Fully Calibrated Frequency-Domain Measurements...with absolute amplitude calibration and unique ease of use, this 1 kHz-to-110 MHz spectrum analyzer may be the beginning of a new era in spectrum analysis, by Brian D. Unter, pg 2-7 Analyzer/Tracking - Generator System Has Amplitude Range of 120dB, pg 4 Design of a Third-Generation RF Spectrum Analyzer...making a spectrum analyzer that is precisely calibrated and as easy to use as an oscilloscope required a number of new circuit and system techniques, by Brian D. Unter, Paul G. Winninghoff, Irving H. Hawley, Jr., Thomas L. Grisell, pg 8-14 New Concepts in Signal Generation...an AM/FM signal generator and precision-sweeper in a single 21-pound package is possible thanks to thin-film microcircuits and AFC, by John R. Hearn, Douglas C. Spreng, pg 15-20 Sept-1968 Cover: The HP Model 9100A Computing Calculator A new Electronic Calculator (HP Model 9100A) with Computerlike Capabilities, by Richard E. Monnier, pg 2-9 Hardware Design of the Model 9100A Calculator, by Thomas E. Osborne, pg 10-13 Internal Programming of the 9100A Calculator, by David S. Cochran, pg 14-16 Computer-Testing the HP Model 9100A Calculator, by Charles W. Near, pg 17-19 How the Model 9100A was Developed, by Bernard M. Oliver, pg 20 Oct-1968 Cover: Spring-mounted stylus used on HP electric writing recorders Graphic Recorder Writing Systems...pen and ink has been the most widely used writing method, but a new low-voltage electric writing system has proven successful for many difficult applications, by Dale R. Davis, Charles K. Michener, pg 2-7 Low Voltage Electric Writing Recorders, pg 7-8 Recording True-rms Voltages over Wide Dynamic Ranges...with this new logarithmic converter, a graphic recorder can measure ac or dc signals over four decades of amplitude without range switching. An electronic attenuator and feedback are the secrets, by John M. Wade, pg 9-14 Atomic Hydrogen Masers: An Introduction and Progress Report...size and weight are being reduced, and demand is growing for the hydrogen maser's high stability. A satellite-borne maser is being developed but still needed is more product-oriented development, by Robert F. C. Vessot, pg 15-20 Nov-1968 Cover: BASIC - The Language of Time Sharing BASIC: The Language of Time Sharing...a computer language designed for the beginner and the once-in-a-while programmer, BASIC is powerful, yet easy to learn, by Gerald L. Peterson, pg 2-8 BASIC at Hewlett-Packard...previously available only on large time-sharing systems, BASIC has been adapted by Hewlett-Packard programmers for HP computers and instrumentation systems, by Richard M. Moley, pg 9-13 How to Correct for Errors in High-Frequency Oscilloscope Measurements...knowing the parameters of various input configuration, it is possible to plot curves to determine error with frequency, by Wayne A. Kohl, pg 14-17 Extending Precision Oscilloscope Measurements into the High Frequencies, pg 17-18 Voltage Probe for High-Frequency Measurements, by Eddie A. Evel, pg 19-20 Dec-1968 Cover: Low distortion of the HP Model 204C Oscillator, measured by the HP Model 3590A Wave Analyzer, is displayed over a 90 dB range on an HP Model 7004A X-Y Recorder Rapid Analysis of Low Frequency Spectra...detection of signal amplitude and frequency is made easier with automatic amplitude ranging and electronic sweeping, by Larry A. Whatley, pg 2-7 High Dynamic Performance X-Y Recorder...pen accelearation has been made compatible with high slewing speed by use of a direct-coupled servo amplifier and a miniature high-torque dc motor, by Otto S. Talle, Jr, pg 8-11 A Low-Cost,General-Purpose Oscillator with Low Distortion and High Stability, by Paul F. Febvre, James M. Colwell, pg 12-16 Amplitude Stability with a Zener Level Detector, pg 14 1969 Jan-1969 Cover: Model 2547A Coupler is shown recording the readings of a counter and a digital voltmeter on punched tape for entry into a time-sharing terminal Broadband Passive Components for Microwave Network Analysis...it takes more than an advanced network analyzer to make accurate, broadband device-parameter measurements. You need precision, broadband hardware and it helps to have everything in one instrument, by Stephen F.Adam , Richard A. Lyon, George R. Kirkpatrick, pg 2-10 Measuring High-Frequency Transistor Parameters...if you have the right instruments, high-frequency transistor measurements are very simple. Here is the method along with some advice on taking and interpreting data, by Richard H. Bauhaus, pg 11-14 Printed-Circuit Slide Switches Save Panel Space, pg 13 Recording Data for Computer Analysis...this modular digital coupler, together with a recording device, translates the digital outputs of voltmeters, counters and other instruments into computer-compatible digital records, by Robert L. Knapp, William J. Steinmetz, pg 15-20 Feb-1969 Solid-state Displays...first in a line of solid-state display devices are these one- and three-digit numeric indicators that are compatible with integrated circuits, needing only BCD input signals and five-volt power to display any numeral from 0 to 9 in an array of bright red dots, by Gerald P. Pighini, Howard C. Borden, pg 2-12 Solid-State Displays, Present and Future, pg 4 Measuring Luminance, pg 10 Hybrid Hot Carrier Diodes...unique combinations of p-n junctions and Schottky barriers have the high breakdown voltage and high-temperature characteristics of silicon, the low turn-on voltage of germanium, and the speed of Schottky barrier devices and they can be produced at low cost, by A. Michael Cowley, Robert A. Zettler, pg 13-20 Hybrid Technology Produces Many Useful New Devices, pg 16 March-1969 Cover: Artistically portrayed unique measurement capabilities of the HP Model 3450A Multi-Function Meter Twelve Functions in a New Digital Meter...some common analog-to-digital conversion techniques and benefits derived from dual slope as used in the new digital instrument, by Jerry L. Harmon, Bill Kay, pg 2-13 Peltier Heating and Cooling, pg 6 A Computer-Controlled System for Testing Digital Logic Modules...high-speed system that can do production testing quickly, thoroughly and economically along with being easy to program and operate and to adapt for testing different modules, by William P. Cargile, pg 14-20 April-1969 Cover: Two Model 1925A Word Generators are cascaded to produce a 32-bit word in a nonreturn-to-zero format shown on the face of a Model 143A Oscilloscope A New Programmable, Building-Block Pulse and Digital System...a pulse generator system consisting of a series of plug-ins that can be combined to provide a wide variety of digital test signals, by Ronald L. Knauber, Gordon K. Blanz, pg 2-8 Why Use Variable Rise and Fall? , pg 5 Generating Words for Digital Testing, by Eddie Donn, pg 8-13 Frequency-Domain Oscilloscope Now Measures to 1250 MHz...with is new RF plug-in, HP's absolutely calibrated RF spectrum analyzer can display any part of the new frequency range from 500 kHz to 1250 MHz - or the whole range at once, by Siegfried Linkwitz, pg 14-20 The Meaning of 'Frequency-Domain Oscilloscope'...excerpts from an Informal Talk, by Roderick Carlson, pg 16 Beyond Traditional Spectrum Analyzer Uses, pg 18 May-1969 Cover: Model 5360A Computer Counter's extraordinary capabilities Introducing the Computing Counter...here is the most significant advance in electronic counters in recent years, by Gilbert A. Reeser, Gary B. Gordon, pg 2-8 The Measurement Cycle and the Concept of Arming, pg 5 An Electronic Counter for the 1970's...what does it take to build an 11-digit counter that goes to 320 MHz and makes time-interval measurements with 100-picosecond resolution?, by Gilbert A. Reeser, pg 9-12 Computation for Measurement Flexibility...the arithmetic unit of the computing counter places a flexible digital computational capability at the disposal of the counter, its plug-ins and the user, by France Rode, Gary B. Gordon, pg 13-16 Automatic Counter Inverts Period to Get Frequency...the computing counter's little brother measures frequencies between 0.125 Hz and 20 MHz with seven-digit resolution and fully automatic ranging and also measures pulsed carrier frequencies directly, by Ian T. Band, pg 17-20 June-1969 Cover: HP Model 4920A Coaxial Fault Analyzer Portable, Rugged Cable Fault Locator for VHF Communications and CATV...designed for field use, an easy-to-operate TDR unit checks CATV and communication system cables with high accuracy, by Ronald D. Lowe, pg 2-8 Time Domain Reflectometry, pg 5 Tradeoffs in Impulse Testing, by James M. Hood, pg 8-9 Compact Function Generator Covers 0.0005 Hz to 5 MHz...new instrument generates seven types of waveforms over a wide frequency range, by Raymond C. Hanson, pg 10-13 IC Logic Checkout Simplified...simple but elegant, this touch-and-read logic probe clearly signals the presence of nanosecond pulses and indicates logic levels in TTL and DTL integrated-circuit logic networks, by Gary B. Gordon, pg 14-16 Pulsar Optical and Radio Emissions Observed Simultaneously...detection of a time interval between the optical and radio pulses has provided an important test of the various theories developed to explain why pulsars pulse, by Charles N. Taubman, pg 17-20 Are Pulsars Rotating Neutron Stars? , pg 20 July-1969 Cover: HP Model 80500A Noise Monitoring System at Stuttgart Airport Real-Time Measurement and On-Line Processing of Acoustical and Other Audio-Frequency Spectra...almost any acoustical quantity can be determined by measuring and suitably processing the frequency spectra of sounds...all it takes is this new real-time audio spectrum analyzer married to a general-purpose digital computer, by Wisu T. Kapuskar, Christopher J. Balmforth, pg 2-10 Monitoring Airport Noise...noise control around airports is never easy but it's next to impossible without up-to-the-minute information about noise levels at critical locations. Here's a computerized system that gathers and processes the necessary data, by Wisu T. Kapuskar, Christopher J. Balmforth, pg 11-15 Network Analysis at Low Frequencies...both phase and amplitude information are obtained with a new network analyzer covering frequencies down to 10 kHz, by Charles A. Kingsford-Smith, pg 16-20 August-1969 Cover: HP Model 9213A is a general-purpose computer-controlled, dc-to-12.4-GHz automatic calibration system for lab-type instrumentation Automated Testing...what it is, what does it buy us and how is it evolving, by Robert A. Grimm, pg 2-6 Choosing an Automatic Test System...when is an automatic test system justified and how do you decide on the configuration, by Stephen C. Shank, M. D. Ewy, pg 7-10 Building an Automatic Test System...some of the things you have to think about when putting a system together, by M. D. Ewy, pg 11-14 Hewlett-Packard Automatic Test Systems...HP uses and supplies small modular systems of all kinds: standard special-purpose systems, standard multipurpose systems, custom systems and system components, by Robert A. Grimm, pg 15-20 Hewlett-Packard Journal Index to Volumes 17,18 and 19 (September 1965 through August 1968), pg 1-12 Sept-1969 Cover: Isometric projection of a function computed by the 9100A Computing Calculator and plotted simultaneously by the 9125A plotter. Graphical Output for the Computing Calculator...an X-Y plotter, designed to take calculator output, draw graphs of solutions complex problems and it can make Smith Charts, polar, semilog log-log plots, by Robert W. Colpitts, Tom Vos, Dan Allen, pg 2-7 Plotter Applications, pg 7 Antenna Plots, pg 7 High-Resolution Time-Domain Reflectometry With a Portable 30-lb Instrument...state-of-the-art sampling oscillography gives 35 ps system risetime to a direct-reading plug-in for the 180-series oscilloscopes, by Jeffrey H. Smith, pg 8-14 Precision DC Current Sources...CCB-Series Current Sources can supply precisely regulated currents and programming is rapid, and tiny leakage currents are eliminated by a guarding technique, by Willis C. Pierce, Jr., Joseph C. Perkinson, pg 15-20 Current Sources in the Laboratory and on the Production Line, pg 16 Oct-1969 Cover: HP Model 4470A Transistor Noise Analyzer Direct Measurement of Transistor Noise Voltage, Noise Current and Noise Figure...new analyzer measures noise in FET's and bipolar transistors from 10 Hz to 1 MHZ while rapid and easy operation makes it suitable for both lab and production testing, by Haruo Itoh, Knud L. Knudsen, pg 2-7 Sources of Noise in Transistors, by Niladri R. Mantena, pg 8-11 Premonitory Heartbeat Patterns Recognized by Electronic Monitor...computerlike instrument for intensive care wards provides advance warning of potentially fatal heart irregularities, by Thomas C. Horth, pg 12-20 Electrical Performance of the Heart, pg 14 Ectopic Beats, pg 15 Nov-1969 Cover: Model 3721A Correlator displaying the crosscorrelation between a wideband noise coming from a loudspeaker and the output of a microphone Correlation, Signal Averaging, and Probability Analysis...correlation is a measure of the similarity between two waveforms which is useful in nearly every kind of research and engineering. Two other statistical methods of waveform analysis are also widely useful, by Richard L. Rex, Gordon T. Roberts, pg 2-8 A Calibrated Real-time Correlator/Averager/Probability Analyzer...this digital signal analyzer computes and displays 100-point autocorrelation functions, crosscorrelation functions, waveshapes of signals buried in noise, probability density functions, and probability distributions, by George C. Anderson, Michael A. Perry, pg 9-16 Correlation in Action, pg 17-20 Dec-1969 Cover: Model 8407A Network Analyzer System which reveals transmission characteristics of a multi-pole bandpass filter, displays amplitude and phase response Network Analysis in the Range 100 Khz to 110 MHz...with speed and convenience, a new Network Analyzer presents swept display of amplitude response as great as 80 dB, yet achieves 0.05 dB resolution, by William A. Rytand, David R. Gildea, pg 2-11 Network Analyzer Applications, pg 7 High Impedance Probing to 500 MHz...intended for use with spectrum analyzers, counters, oscilloscopes and network analyzers when the signal can't be brought to the instrument on a 50-ohm line, a new dc-500 MHz voltage probe has an input impedance of 100 k ohms shunted by less than 3pF or, with a slip-on voltage dividers, less than 1 pF, by Joel Zellmer, pg 12-16 1970 Jan-1970 Cover: Operator uses optical comparator to check alignment of helical electrodes in new 250MHz Oscilloscope's cathode-ray tube A DC-to-VHF Oscilloscope...displaying intermittent pulse trains with nanosecond risetimes, capturing fst transients, a predetector look at amplitude-modulated carriers-these are some of the tasks performed by a new general-purpose oscilloscope that has dc-250 MHz bandwidth and 10 mV/cm sensitivity, by James Pettit, pg 2-8 A Fast-Writing, High-Frequency Cathode-Ray Tube...a three-way requirement for high-frequency response, fast writing rate, and sensitivity used all that we knew about cathode-ray tube design, and more, by David Chaffee, pg 9-10 A Wideband Oscilloscope Amplifier...solid-state monolithic technology makes possible wideband amplifier design with improved response, economy of power, and ease of maintenance, by Alan J. Devilbiss, pg 11-14 Monolithic Transistor Arrays for High-Frequency Applications, by Merrill Brooksby, Richard D. Pering, pg 15-16 A Fast Time Base for a High-Frequency Oscilloscope...a fresh approach to time base circuits was needed to get fast linear sweeps and stable triggering at high frequencies, by William Mordan, pg 17-20 Feb-1970 Cover: Automatic network analyzer systems can vary widely and the power of these systems has produced a revolution in microwave engineering A System for Automatic Network Analysis, by Douglas Kent Rytting, Steven Neil Sanders, pg 2-10 About the hardware, pg 8 Software for the Automatic Network Analyzer, by William A. Ray, Warren W. Williams, pg 11-15 Developing Accuracy Specifications for Automatic Network Analyzer Systems, by B.P. Hand, pg 16-19 Applications of the Automatic Network Analyzer, by Brian Humphries, pg 20-24 March-1970 Cover: Model 5375 A Keyboard The Computing Counter Gets Its Keyboard...the computing counter with its keyboard has the computing ability and operating convenience of a programmable desk calculator, plus the ability to make measurements and process the measured data in real time, by Keith M. Ferguson, pg 2-10 Correction to "'Flying Clock' Companrisons Extended to East Europe, Africa and Australia", pg 10 Protecting Hospitalized Patients from Electrical Hazards...electrodes internal to the body give rise to safety problems far more complex than generally supposed, requiring changed thinking about the design and use of medical electronics equipment. Electronic engineers can help explain these concepts, by William F. Craven, pg 11-17 Calculator Processes Multichannel Analyzer Data...two interface cards and a cable connect HP multichannel analyzers to HP's programmable desktop calculator, by Norman D. Marschke, pg 18-20, April-1970 Cover: Model 5326B Timer/Counter DVM Timer/Counter/DVM: A Synergistic Prodigy?...one version of this medium-cost universal counter has an internal digital voltmeter, from which it derives some surprising capabilities. Both versions can average repetitive time intervals for increased resolution, and can measure the frequencies of pulsed carriers, by Kenneth J. Jochim, Rolf Schmidhauser, pg 2-10 A Network Analyzer With Digital Readout, pg 9 Measuring Nanosecond Time Intervals by Averaging...what kind of resolution can you get and how do you get it?, by Rolf Schmidhauser, pg 11-13 High Accuracy AC Calibration to 1100 Volts, by Fred L. Hanson, pg 14-17 A New Camera for High-Speed Oscilloscope Recording, by Dan Paxton, pg 18-20 May-1970 Cover: IMPATT diodes Design and Application of Silicon IMPATT Diodes...DC power is converted directly into microwave energy by an IMPATT diode. In X-band, these devices generate higher CW power than any other present-day, solid-state microwave source, clearing the way for new cost-sensitive microwave designs, by A.M. Cowley, pg 2-13 Making Cool-Running IMPATT Diodes, pg 8 Measuring IMPATT Diode Thermal Resistance, pg 10 Measuring Capacitance Automatically...completely automatice multifrequency bridge measures capacitance from 0.001 pF to 1.2 F, conductance and dissipation factor, by Hitoshi Noguchi, Takeo Shimizu, Koichi Maeda, pg 14-20 Logic Circuits, pg 17 June-1970 Cover: Model 5450A Fourier Analysis next to a United Airline jet engine Digital Fourier Analysis...some of the theoretical and practical aspects of measurements involving Fourier analysis by digital instrumentation, by Peter R. Roth, pg 2-9 A Calibrated Computer-Based Fourier Analyzer...this pushbutton-controlled digital measuring instrument performs complex analytical operations on input signals or time series and as a bonus, the user gets a general-purpose digital computer, by Agoston Z. Kiss, pg 10-20 A Fourier Analyzer Makes Fundamental Measurements, pg 15 July-1970 Cover: An inspector critically eyes solid-state alphanumeric display module. Solid-State Alphanumeric Displays, by Howard C. Borden, Robert L. Steward, pg 2-9 The Mathemantics of Strobed Arrays, pg 9 Adding More Precision to Spectrum Analyzer Measurements...augmented with a combination tracking signal generator and counter, the spectrum analyzer becomes a swept measuring system of great frequency precision and dynamic range, by Patrick J. Barrett, Robert R. Hay, Paul G. Winninghoff, pg 10-16 Product Design, by William H. Bull, pg 13 August-1970 Cover: Model 5525A Laser Interferometer A Two-Hundred-Foot Yardstick with Graduations Every Microinch...this new and innovative laser interferometer is ready to measure distance with no warmup at all. From its specially designed two-frequency laser and heterodyning techniques it derives increased sensitivity and resistance to air turbulence and with its internal computer it can smooth jittery readings, calculate velocity and improve resolution, by John N. Dukes, Gary B. Gordon, pg 2-8 A New Tool for Old Measurements - New Ones Too, by Andre F. Rude and Kenneth J. Wayne, pg 9 Automatic Error Plotting - a Report Card for Nonlinear Behavior, by Jonathan D. Garman, pg 10-11 Machine Tool Evaluation by Laser Interferometer, by Richard R. Baldwin, pg 12-13 An Instant-On Laser for Length Measurement...this specially designed two-frequency laser is rugged, tunes itself instantly, and runs cool, by Glenn M. Burgwald, William P. Kruger, pg 14-16 Sept-1970 Cover: Some of the digital devices that can communicate with each other by means of Model 2570A Coupler/Controller. A Programmable, Modular, Bidirectional Data Coupler...instrumentation coupler, automated test system controller, computer interface. This new coupler/controller assumes many identities to create a broad range of new possibilities for system automation, by Gibson F. Anderson, pg 2-6 Instrumentation Systems Controlled by Time-Shared Computers...a coupler/controller and an acoustic coupler can put a large computer into a system at very low cost, by Neal E. Walko, pg 7-9 Measuring Q - Easier and Faster...thirty-five years later, Q measurements become easier, with greater Q range and over wider bands, by Shiro Kito and Kelichi Hasegawa, pg 10-16 Oct-1970 Cover: Model 9100 Calculator System and the Model 9160A Card Reader More Memory for Desktop Calculators...extended memory unit adds as many as 3472 program steps, by Russell Sparks, pg 2-7 Error Indication in the Model 9101A Extended Memory, pg 5 Sample Program, pg 5 Optical Card Reader for Fast Calculator Programming, by Gene Zeller, pg 8-12 Typical Program, pg 12 Hard Copy Output for the System 9100 Computing Calculators, by Chuck McAfee, pg 13-16 Nov-1970 Cover: The directional detector, the frequency converter module, the 2-4 GHz YIG oscillator, the PIN absorptive modulator, and the 0.1-2 GHz amplifier Sweeping the Microwave Spectrum with Solid-State Sources, by Robert H. Bathiany, Carl J. Enlow, Phillip G. Foster, Stephen Vitkovits, pg 2-8 Microcircuits for the Microwave Sweeper, by Ronald E. Pratt, Robert W. Austin, Arlen Dethiefsen, pg 9-16 Dec-1970 Cover: Crystal plating is a typical process-control application for the 5360A Computing Counter and its new Programmer, Model 5376A Computing-Counter Measurement Systems...automated measurements and data processing don't necessarily require a computer. Systems based on the HP computing counter and a new programmer have computer capabilities but lower-than-computer costs, by David Martin, pg 2-6 Programmer is Key to Computing-Counter Systems...this modular programmer provides programmability and interface facilities to go with the computing counter's arithmetic and precision measurement capabilities, by Eric M. Ingman, pg 7-10 Instruction Repertoire, HP 5376A Programmer, pg 11-12 Measuring Noise and Level On Internatioanl Telephone Systems, by Jim Plumb, Jacques Holtzinger, pg 13-16 1971 Jan-1971 Cover: Half-module and rack versions of the HP Model 3480A/B A New High-speed Multifunction DVM...plug-ins provide true rms ac capability as well as dc and ohms. Reading speed is 1000 per second of ohms and dc, by Lee Thompson, Craig Walter, H. Mac Juneau, pg 2-15 What is the HP Model 3480A? , pg 12 Electrical Isolation: Coupling from Low to Chassis, pg 13 Feb-1971 HP/CAI...this computer-assisted-instruction or CAI, system makes impressive contributions to the state of the art of CAI. It's a combination of field-proven hardware, a standard computer language, and well tested curricula. The first curriculum is an elementary mathematics drill and practice program, by Samuel D. Edwards, William G. Ansley, pg 2-10 HP/CAI-In the Beginning, pg 3 HP/CAI-The Future, pg 9 Distortion in Complementary-Pair Class-B Amplifiers...in which the author develops, among other things, a new treatment of crossover distortion, by B. M. Oliver, pg 11-16 March-1971 Cover: One of the reactors at General Electric Company's Vallecitos Nuclear Center. On-Line Data Reduction for Nuclear Analyzers...sniffing out minute amounts of radioactivity in our environment is just one of the talens of the versatile multichannel analyzer. Here are four multichannel analyzer systems - two of them brand new - that include on-line computing devices capable of anything from straight number crunching to completely automating the analysis, by Jonathan R. Cross, James A. Doub, John M. Stedman, pg 2-10 Identifying Radioactive Materials, pg 4 Multichannel Analyzers and People, pg 6 Very High and Very Low Resistances - Why and How They Are Measured...these extremes of the resistance range can tell a great deal about properties of materials and the quality of semiconductor contacts, by Yoshihisa Kameoka, Jean E. Bonhomme, pg 11-16 April-1971 Cover: Model 1930A Pseudo-Random Binary Sequence Generator Manipulating Digital Patterns with a new Binary Sequence Generator, by Edward S. Donn, pg 2-8 How to Make a Nuclear Spectrum Hold Still...it's simple with this new digital spectrum stabilizer, by Steven Upshinsky, pg 9-11 Astronomers Find Optical Timing of Pulsars More Accurate...measuring light pulses instead of readio pulses yields more accurate information about pulsar characteristics, by Laurence D. Shergalis, pg 12-13 Programmable Step Attenuators Use Distributed-Thin-Film Attenuator Cards...new programmable Step Attenuators employ a special transmission-line configuration with common outer conductors, so only center conductors need to be switched, by Stephen F. Adam, pg 14-16 May-1971 Cover: Dry lake bed dramatizes ability of new 1700-series Oscilloscopes to bring lab scope performance anywhere it may be needed A Power-Thrifty Portable Oscilloscope...a big step forward in battery-powered scope performance - up to 75 MHz bandwidth with dual-trace operation and delayed sweep - is taken by the new 1700-series Oscilloscopes, by Thomas K. Bohley, Donald R. Bloyer, Robert E. Mast, pg 2-10 No-Fuss Trigger Circuit, pg 6 High-Efficiency Power Supply, pg 6 Low-Power Amplifier, pg 7 NBS Publishes Revised List of Physical Constants, pg 11 Effective Stripline Device Characterization...characterizing stripline devices for high-frequency designs requires more than elegant instrumentation - demands placed on the device-handling hardware are suprisingly severe, by George R. Kirkpatrick, pg 12-16 Effective Stripline Device Characterization, pg 12 June-1971 Cover: Rotational microwave spectroscopy gives exact information about the structures of molecules The Routine Rotational Microwave Spectrometer...for the first time, it's now a simple matter to get high-quality data using this 30-year-old technique. A new spectrometer makes the centimeter-wavelength region of the spectrum available for routine analytical work, by Howard W. Harrington, John R. Hearn, Roger F. Rauskolb, pg 2-12 Everything You Always Wanted to Know About Rotational Microwave Spectroscopy, pg 4 New HP Division for Physics and Physical Chemistry, pg 6 HP 8460A MRR Spectrometer, pg 12 An Easy Way to Analyze Graphs, by Ivar Larson, Dean Millett, pg 13-16 Typical Applications, pg 14 July-1971 Cover: The 9401B Digital Test Unit, heart of a new digital test subsystem that multiples the capabilities of these modular computer-controlled systems General-Purpose Test System Gets Digital Capability...HP's most general-purpose computerized automatic test system can now test digital and analog/digital electronic devices as well as purely analog devices. A new subsystem gives it a functional logic test capability, by Leif Gudnitz, Homer Tsuda, pg 2-9 Digital Testing versus Digital Testing, pg 4 Software Drivers and BASIC Statements for Digital Testing, pg 7 Optical Power Measurements Made Easy...this new low-cost radiant flux meter system gives direct radiometric measurements in the infrared, visible, and ultraviolet regions of the spectrum. It zeros and calibrates itself too, by Michael R. Mellon, Charles L. Hicks, pg 10-16 Multitudinous Applications, pg 14 Units of Optical Power, pg 15 Aug-1971 Cover: A 5300A mainframe, a 5310A battery pack, a 5303A 500 MHz counter module and a makeshift antenna Lilliputian Measuring System Does Much, Costs Little...a mainframe costing less than $400, a choice of four functional snap-on modules including a 500-MHz counter, and an unusual battery pack are the elements of this rugged, portable, MOS/LSI/LED instrument system, by Ian T. Band, Hans J. Jekat, Eric E. May, pg 2-12 An Almost All-Solid-State Strip-Chart Recorder...linear motor pen drive replaces complex servo system with only one moving part, by Charles K. Michener, pg 13-16 Sept-1971 The Spectrum Analyzer, Oscilloscope For the Frequency Domain: A Special Issue, pg 2-3 A Fully Calibrated, Solid State Microwave Spectrum Analyzer...microwave spectrum analysis with performance advantages previously associated only with lower frequency instruments, by Richard C. Keiter, pg 4-9 Tracking Generators...tracking generators, working with spectrum analyzers, expand measuring ability, by John Page, pg 10-11 A Low Frequency Spectrum Analyzer...fully calibrated spectrum analysis now is extended downwards to 20 Hz, by Irving H. Hawley, Jr., pg 12-15 Oct-1971 Cover: Inside the new 2100A Computer is another computer, the microprocessor, most of which fits on the two boards shown here Price, Performance, Architecture, and the 2100A Computer...here are the why's behind the design of HP's new minicomputer, by Fred F. Coury, pg 2-3 Microprogramming, ROMs, Firmware and All That...behind the scenes in HP's new mini is a sophisticated microcomputer with its own instruction repertoire and an expandable memory, by Charles T. Leis, pg 4-9 ROM Simulator Tests Computer in Five Minutes, pg 8 A Lot of Memory in a Small Space...this new core memory is fast, rugged, reliable and small enough to expand to 32K words inside the 2100A mainframe, by Robert J. Frankenberg, pg 10-12 A Bantam Power Supply for a Minicomputer...how do you get a 500 watt power supply with several regulated dc output voltages into half a cubic foot of space, by Richard D. Crawford, Gregory Justice, pg 13-15 New UTC System, pg 20 Back Cover: UTC Time Scale to Change in 1972 Nov-1971 Cover: Model 1810A Sampling Oscilloscope plug-in A Scrutable Sampling Oscilloscope...some find sampling scopes enigmatic, choosing to forego their high-frequency response and sensitivity rather than use them. Here's a sampling scope for people who don't like sampling scopes, by William Farnbach, pg 2-8 Frequency Stability Measurements by Computing Counter System...here are methods for making either time-domain or frequency-domain measurements conveniently, accurately, and with high resolution, by David Martin, pg 9-14 More Informative Impedance Measurements, Swept from 0.5 to 110 MHz...an accessory Probe converts the Model 8407A Network Analyzer into a vector impedance measuring system that gives instantaneous swept display of a component's or network's complex impedance versus frequency, by Julius K. Botka, pg 15-19 Back Cover: Time Step and Elimination of the Frequency Offset of the UTC System Dec-1971 Cover: John Shanahan and Hamilton Chisholm present a new signal generator that's also a versatile synthesizer Uniting Signal Generation and Signal Synthesis...a simultaneous solution is devised to the problems of signal generation and signal synthesis, while optimizing both for bench and automatic use, by John C. Shanahan, pg 2-13 The Indirect Synthesis Approach, pg 7 Remote Laser Interferometry...this unique remote interferometer, affectionately dubbed "The Magic Cube" significantly improves the stability, accuracy, and scope of laser interferometer measurements, by Richard R. Baldwin, Andre F. Rude, Gary B. Gordon, pg 14-20 Magic Cube and Modules Make Many Measurements, pg 16 Angstrom Measurements with Velocity-of-Light Compensations, the Remote Interferometer, and a Simple Electronic Resolution Extender, pg 18 1972 Jan-1972 Cover: A new computerized catheterization lab measurement system A Computer-aided Hospital Systems for Cardiac Catheterization Procedures...computer reduction of data acquired during cardiac catheterization eliminates considerable pencil and paper computation, a significant time-saver for the physician. Simultaneously, it guarantees highly sophisticated meaurements while shortening a normally lengthy procedure, a less disquieting experience for the patient, by John L. Fanton, pg 2-7 The Cath Lab, pg 3 Finding a Good Waveform, pg 6 Clip-and-Read Comparator Finds IC Failures...here's a clever new tool for troubleshooting digital integrated-circuit equipment, by Mark Baker, Jesse Pipkin, pg 8-12 Probe, Clip, Comparatora Three Complementary IC Logic Testers, pg 11 The Well-Modulated Synthesizer...while preserving synthesizer qualities, means are found to modulate output widely, precisely, and remotely, by James E. Stinehelfer, pg 13-16 Feb-1972 Cover: New HP Automatic Spectrum Analyzer can detail the scene, identify alarm conditions and offer further options Introducing the Automatic Spectrum Analyzer...under computer control a modern spectrum analyzer becomes an entirely new instrument, by Michael Cunningham, Lynn Wheelwright, pg 2-6 Organizing the Automatic Spectrum Analyzer System...organization determines the usefulness of the system's many capabilities, by William H. Shaffer, pg 7-9 Automating the 10-MHz-to-18-GHz Receiver...as it is automated, the spectrum analyzer not only acquires computer programmability but also some improvements in basic performance, by Steven Neil Sanders, pg 10-13 Hewlett-Packard's Barney Oliver and John Cage Write the Book...no one or two authorities on instrumentation could alone have produced the new McGraw-Hill text "Electronic Measurements and Instrumentation" which Oliver and Cage have edited, pg 14-16 Fine-line Thermal Recording on z-fold Paper, by Walter R. McGrath, Arthur Miller, pg 17-20 Position Feedback for Galvanometer Fidelity, pg 18 New Recorders Use Hot-tip Writing, pg 20 March-1972 Cover: Microwave Communications Repeater Time Domain Reflectometry in Narrowband Systems, by Gene A. Ward, pg 2-7 Measuring High-value Capacitors...high-capacitance electrolytics have been difficult to measure but new circuit developments make "touch and read" measurements possible, by Yoshihisa Kameoka, pg 8-13 Measuring True RMS AC Voltages to 100 MHz...broadband measurements of true rms voltage used to be costly or inaccurate or both, by J.B. Folsom, pg 14-20 April-1972 Cover: HP's new ECG Telemetry System An Effective ECG Telemetry System...replacing direct wiring with an RF telemetry link benefits a monitored cardia patient by releasing him from the confines of a bed, but it could create some additional problems for the nursing staff but the ECG Telemetry System deftly overcomese these problems, by James Larsen, Richard Dillman, Alfred Nardizzi, Richard Tverdoch, pg 2-9 Why ECG Telemetry? , pg 3 The Importance of Slew-Rate Limiting, pg 6 A Human Interface for Automatic Measurement Systems...this system console enhances a user's ability to operate a measurement system that features a magnetic tape cassette operating system and an interactive graphic display, by Kenneth Fox, Marc Pasturel, Peter Showman, pg 10-17 An Agile Graphic Display Device...the new Graphic Displays have a display area of 11x15 inches, 0.02 inch spot size, 50 ft-L brightness, less than 1 large-step jump and setting time something that has not been met by a display device until now, by John Riggen, Douglas Fogg, pg 18-24 What about Storage Displays? , pg 21 May-1972 Cover: The fast, precise linear-motor actuator and head carriage assembly that moves the read/write heads in Model 7900A Disc Drive A Faster, Tougher Disc Drive for Small Computer Systems...here's a high-performance cartridge disc drive that doesn't have to be treated like a baby since it's the only peripheral storage device most small computer systems need, by James Herlinger, James Barnes, pg 2-5 About Disc Drives, pg 4 Inside the 7900 Disc Drive...here's what makes it fast, accurate, rugged and reliable, by James Herlinger, William Lloyd, pg 6-11 Reading and Writing on the Fast Disc...specially designed wide-temperature range heads and a phase-locked loop help guarantee reliable data transfer...by William Girdner, Wallace Overton, pg 12-14 An Efficient Disc Drive/Computer Interface...the I/O structure minimizes bulk, system cost, and computer overhead, but doesn't get in the way of drive performance, by Donald Bowman, pg 15-16 Narrowband Noise Immunity in a Broadband Gain-Phase Meter...a new Gain-Phase Meter promises to make phase measurements as routine as voltage measurements and despite its broad bandwidth, the new instrument has much of the ability of narrowband phase-meters to suppress the effects of noise, by Raymond Hanson, pg 17-20 June-1972 Cover: Dr. Dennis R. Clark of the Stanford University Department of Pharmacology with his HP-35 Pocket Calculator The 'Powerful Pocketful': an Electronic Calculator Challenges the Slide Rule...this nine-ounce, battery-powered scientific calculator, small enough to fit in a shirt pocket, has logarithmic, trigonometric, and exponential functions and computes answer to 10 significant digits, by Thomas Whitney, France Rode, Chung Tung, pg 2-9 Operational Stacks and Reverse Polish Notation, pg 5 How the HP-35 Compares with the Slide Rule, pg 7 Algorithms and Accuracy in the HP-35...a lot goes on in that little machine when it's computing a transcedental function, by David Cochran, pg 10-11 Packaging the Pocket Calculator...the industrial design of the HP-35 was of primary importance, often taking precedence over electrical considerations, by Edward Liljenwall, pg 12-13 New Capabilities in Digital Low-Frequency Spectrum Analysis...a new Fourier analyzer and two fast-transform peripherals adapt to a wide range of applications, by Stephan Cline, Norman Marschke, pg 14-20 The Where and How of Fourier Analyzers, pg 18 July-1972 Cover: HP's new Automatic Synthesizer The Synthesized Test Oscillator - A New Signal Source for the 0.1 Hz-13 MHz Range...programmability, high accuracy in frequency and level setting, waveform purity are some of the capabilities that are being asked of a wide-range signal sources and this one does, by Ronald Tuttle, pg 2-8 Party-line Programming, pg 8 The Incremental Sweep Generator - Point-by-Point Accuracy with Swept-Frequency Convenience...puttinh a calculator in a 0.1 Hz-to-13 MHz Frequency Synthesizer gives the lab bench the speed and convenience of automatic testing, by Charles Kingsford-Smith, pg 9-15 Microprogramming and Writable Control Store...here's what these powerful but little-understood features of the HP 2100A minicomputer mean to the user, by Fred Coury, pg 16-20 August-1972 Cover: The new Model 3490A Digital Multimeter Compactness and Versatility in a New Plug-Together Digital Multimeter...a new 4 1/2 digit Multimeter is constructed in sections that plug together to form a compact instrument, giving the user a choice of capabilities, by Albert Gookin, pg 2-6 A New Five-Digit Multimeter that can test itself...along with 5-digit resolution, guarded inputs and other attributes of a precision multimeter, this one has an enhanced confidence factor, it can interrogate itself to verify that all goes well, by Lee Thompson, pg 7-12 Functional Modularity Helps Designer and User of New Measurement and Control Subsystem...a method of allocating functions to modules in a system, functional modularity gives a new industrial system-in-a-box a high degree of versatility at reasonable cost, by James Kasson, pg 13-19 Modular Systems for Sensor-Based Data Acquisition and Control, pg 15 Unusual Pacer Excels in System Timing, pg 17 Multi prog ram mer Magnifies Minicomputer I/O Capacity...when you have an automatic system with dozens or hundreds of devices to control and monitor, and only a minicomputer to do the job, this minicomputer I/O extender can help, by John Mickowski, pg 20-24 Sept-1972 Cover: The Logic Pulser and the Microwave Link Analyzer Logic Pulser and Probe: a New Digital Troubleshooting Team...a new Logic Pulser in a probe package injects pulses onto digital circuit nodes without disconnecting IC outputs, by Robin Adler, Jan Hofland, pg 2-7 Two Troubleshooting Kits, pg 6 A New Microwave Link Analyzer with High-Frequency Test Tones...microwave link nonlinearities yield their secrets to high-frequency test tone probing, by Reid Urquhart, pg 8-16 Microwave Radio Communications and Performance Measurements, pg 10 MLA Measures RF Performance with Down Converter...using this addition to the HP Microwave Link Analyzer gives new insights into microwave link performance, by Michael Crabtree, pg 17-18 Communications-Oriented Microwave Solid-State Sweeper...one use is as an up-converter with the HP Microwave Link Analyzer to make RF measurements, by Arlen Dethlefsen, pg 19-20 Oct-1972 A Practical Interface System for Electronic Instruments...connecting instruments into a digitally-controlled system now becomes a matter of plugging in cables, by Gerald Nelson, David Ricci, pg 2-7 A Common Digital Interace for Programmable Instruments: The Evolution of a System...HP's corporate interface engineer describes the trends, philosophy, and ancestors that have helped define the new HP instrument interface system, by Donald Loughry, pg 8-11 Faster Gain-Phase Measurements with New Automatic 50Hz-to-13MHz Network Analyzers...complete characterization of networks in the frequency domain now becomes faster and more convenient than ever, by Gerald Nelson, Paul Thomas, Robert Atchley, pg 12-20 The Analog Story, pg 14 The Digital Story, pg 16 Programming Economy, pg 19 Nov-1972 Cover: HP's new "voltmeter for the microwave engineer" A "Voltmeter" for the Microwave Engineer...it makes swet insertion and return loss measurements simultaneously, over a wide frequency range, pg 2-7 Evolution of a Diode Detector, pg 4 The Well-Matched Modulator, pg 6 Versatile Display Unit Extends Correlator Capability...together this new Spectrum Dislay and an HP Correlator form a versatile and economical instrument for analyzing signals and systems in the time and frequency domains simultaneously, by David Morrison, Brian Finnie, Rajni Patel, Kenneth Edwards, pg 8-15 APPENDIX: Effects of Input Quantization, pg 14 Voltage Precision and High Current Capability - Both in One Power Supply...this new family of power supplies combine the accuracy of a calibrator with brute force power, by George Emmermann, pg 16-20 Dec-1972 Cover: Models 10, 20 and 30 are three quite different calculators for a diversity of users with a diversity of calculating capabilities A New Series of Programmable Calculators...the three calculators and many peripherals of the 9800 Series are designed to handle the broadest possible range of applications, by Richard Spangler, pg 2-4 Model 10 Maintains Compatibility, Expands Capability, by Curtis Brown, Jack Walden, pg 5-7 Interactive Model 20 Speaks Algebraic Language, by Rex James, Francis Yockey, pg 8-13 Printer and Keyboard for Models 10 and 20, pg 11 BASIC-Language Model 30 Can be Calculator, Computer or Terminal, by Richard Spangler, pg 14-18 9800 Processor Incorporates 8-MHz Microprocessor, by Henry Kohoutek, pg 19-22 All-Semiconductor Memory System Includes Read-Only and Read/Write Chips, by Calvin Finn, pg 22-24 Versatile Input/Output Structure Welcomes Peripheral Variety, by Gary Egan, pg 24-27 Development of the 9800 Series, by Robert Watson, pg 27-28 1973 Jan-1973 Cover: The new HP 3000 Computer System An Economical Full-Scale Multipurpose Computer System...this is the first 16-bit computer system to have a hardware stack architecture and virtual memory. It handles time-sharing, batch processing, and real-time operations in several languages concurrently, by Bert Forbes, Michael Green, pg 2-6 A Computer for All Reasons, pg 7 Central Bus Links Modular HP 3000 Hardware...sharing the bus can be one or more CPU's, I/O processors, memory modules, high-speed I/O channels and special devices. The microprogrammed CPU's have a procedure-oriented stack architecture, by Jamshid Basiji, Arndt B. Bergh, pg 9-14 Software for a Multilingual Computer...SPL is a high-level language that produces code that's as efficient as other systems' assembly-language code. Other 3000 languages are FORTRAN, BASIC and COBOL, by William E. Foster, pg 15-19 Single Operating System Serves all HP 3000 Users...the Multiprogramming Executive operating system takes care of command interpretation, file management, memory management, scheduling and dispatching, and input/output management for time-sharing, batch and real-time users, by Thomas A. Blease, Alan Hewer, pg 20-24 Feb-1973 Cover: HP's new Model 8640A/B 0.45-550 MHz Signal Generator A Solid State VHF Signal Generator for Today's Exacting Requirements...the spectral purity of a vacuum-tube oscillator and the freedom from aging effects characteristic of solid-state oscillators are combined in a new 450 kHz-550 MHz signal generator that also includes high-quality FM and AM capabilities in addition to CW, by Michael S. Marzalek, Larry C. Sanders, Kenneth L. Astrof, Raymond M. Shannon, pg 2-13 Signal Generators and Radio Receiver Measurements, pg 3 Computer-Aided Design of Modular Power Supplies...a universal circuit and a computer program - these make it possible to obtain fixed-voltage, modular power supplies in a wide range of output ratings at low cost, but with labratory-grade performance and reliable operation assured, by Willis C. Pierce, Jr., James S. Gallo, William T. Walker, pg 14-20 March-1973 Cover: HP Model 5700A Gas Chromatograph High Performance Flame-Ionization Detector System for Gas Chromatography...a new electrometer circuit plus improvements in mechanical design bring a higher level of performance to a widely-used technique for chemical analysis, by Douglas H. Smith, pg 2-10 Gas Chromatography, pg 4 The 5700A-series Gas Chromatographs, pg 8 Synthesized Signal Generation to 1.3 GHz...because they maintain quartz-crystal stability at all frequencies over a wide range, frequency synthesizers find growing use in testing procedures , by Bradley Stribling, Young Dae Kim, Roland Hassun, Dieter Scherer, Melvin Humpherys, Charles Cook, pg 11-19 A 0.1 to 1300 GHz Amplifier, pg 15 A Greater Range of Capabilities for the Compact, Plug-on Digital Multimeter...higher sensitivity for voltage and resistance measurements, 5-digit resolution and a new "set range" concept are given the inexpensive 3470 Measurement System by new plug-on modules, by Arthur Dumont, Stephen Venzke, Reid Gardner, pg 20-24 April-1973 Cover: Behind the type N connector on the front panel of Model 5340A Frequency Counter is the assembly shown here: a power splitter followed by two wide-band thin-film hybrid samplers and toher elements of two phase-locked loops A High-Performance Automatic Microwave Counter...this new counter needs only a single input to measure 10Hz to 18 GHz, and its sensitivity is many times better than previous counters, by Richard F. Schneider, pg 2-9 A dc-to-20-GHz Thin-film Signal Sampler for Microwave Instrumentation...this rugged, miniature, wideband sampler is responsible for many of the advanced capabilities of the new Model 5340A Microwave Counter, by Jerry Merkelo, pg 10-13 Automating the Calibration Laboratory...this new family of systems, combining standard and specially developed hardware and software, greatly reduces instrument calibration times without sacrificing precision or thoroughness, by John L. Minck, E. Robert Aikin, pg 14-24 Some Definitions for Calibration Laboratory Work, pg 17 Novel Procedures Speed Automatic Calibrations, pg 18 Observations from an Operating System, pg 23 May-1973 Cover: Ray Hutchinson at the Pacific Stock Exchange holding a HP-80 Business Pocket Calculator A Pocket-Sized Answer Machine for Business and Finance...this new nine-ounce, battery-powered calculator replaces most commonly used financial tables, such as compound interest, annuities and bonds and it's also a 200-year calendar, by William L. Crowley, France Rode, pg 2-9 Examples of HP-80 Solutions, pg 5 APPENDIX A A Typical HP-80 Algorithm, pg 8 APPENDIX B Principal HP-80 Equations, pg 8 Laboratory Notebook * Thick Films Widen Attenuator Response, by Thomas Zamborelli, pg 9 A More Rugged, Cleaner Writing Oscillographic Ink Recorder...this new oscillographic recording system features a reliable low-pressure ink system, instant-dry near-black ink, plug-in versatility and a rugged, serviceable design, by Lawrence Brunetti, pg 10-17 Single-Channel 100-mm-Wide Recording, pg 14 APPENDIX Dynamic Writing System Analysis, pg 15 A Quiet, Low-Cost, High-speed Line Printer...this thermal printer writes 80 column lines at 250 lines per minute. Developed primarily for the 9830A Calculator, it's a general-purpose printer that's easily interfaced to a variety of controllers, by Dick B. Barney, James R. Drehle, pg 18-24 The Thermal Printhead Story, pg 23 June-1973 Cover: The tweezers hold a new monolithic silicon-on-glass diode quad Schottky-Barrier Diodes Structured for Better High-Frequency Performance...connecting discrete components into thin-film hybrid circuits becomes increasingly difficult as the demand for higher frequencies gives rise to smaller components. Described here is a way of fabricating diodes to gain high frequency performance without imposing severe mechanical limitations, by Raymond A. Morris, Jack H. Lepoff, pg 2-6 DMM and DAC Modules Expand Low-Cost Measuring System...a five-digit multimeter/counter module and a three-digit digital-to-analog converter mdoule are new members of the 5300 Measuring System joining the mainframe, battery pack, and four timer/counter modules previously available, by Lewis W. Master, James F. Horner, P. Thomas Mingle, pg 7-15 Which Multimeter? , pg 9 A Compact, Three-Digit Digital-to-Analog Converter Module, pg 11 APPENDIX 5306A Noise Rejection Characteristics, pg 14 Laser/Calculator System Improves Encoder Plate Measurements...this in-house system is a good example of what the right combination of instruments and calculator can do for measurements. Developed for acceptance testing of the optical position-encoder plates used in HP moving-head disc drives, its speed and accuracy have helped improve yields from the original 20% to the present 90%, by Glenn O. Herreman, pg 16-18 Calculator with Metrology Programs Now a Laser Option, pg 18 Instrument Basics Without Pain...engineers and non-engineers in science and technology have one thing in common: they need to understand electronic instruments. HP's Clyde Coombs has assembled a book that answers the need - Basic Electronic Instrument Handbook - a book review by Ross Snyder, pg 19-20 July-1973 Cover: The monochromator assembly, crystal disperser, electron lens and detector assembly from Model 5950A ESCA Spectrometer A Second-Generation ESCA Spectrometer...monochromatized x-rays, a dispersion compensated electron optical system and an improved detection system enhance the sensitivity and resolution of a powerful analytical technique - Electron Spectroscopy for Chemical Analysis, by Michael A. Kelly, Charles E. Tyler, pg 2-14 Electron Spectroscopy for Chemical Analysis, pg 5 The Charging Effect, pg 10 Compact Function Generator with Enhanced Capability/Cost Ratio...a no-frills design plus a computer's help in verifying zero production defects brings the cost of this handy instrument down without sacrificing quality, by E. Harry Heflin, pg 15-20 Low-Cost Function Generator Circuits, pg 18 Aug-1973 Cover: The HP 9540 Transceiver Test System helps assure reliability by improving quality control, and lowers test costs, too Automated Transceiver Testing...a new computerized system is dedicated to production and maintenance testing of mobile transmitters, receivers, and transceivers in the communication bands from 10 MHz to 1000 MHz. Tests conform to EIA standards and include AM, FM, audio, and power tests, by Dimitry A. Bobroff, pg 2-7 Shielding and Grounding, pg 7 Signal Processing Techniques for Automatic Transceiver Testing...here's how the 9540 System test transceivers to EIA standards using only a voltmeter and a counter, by Robert G. Huenemann, pg 8-13 Sample Timing Considerations, pg 11 Digitally-Controlled Current Sources for New Ways of Making Automatic Measurements...using a digitally-controlled current source as the stimulus in automatc test systems simplifies some measurements, improves others, and makes some easy that would be hard to do any other way, by Rene Peerboom, pg 14-20 Index: Volumes 20, 21, 22, 23 and 24 - September 1968 through August 1973, PART I: Chronological Index pg 2-5, Part II: Subject Index pg 6-15 Sept-1973 Cover: Model 3580A Spectrum Analyzer A Low-Frequency Spectrum Analyzer that Makes Slow Sweeps Practical...this new spectrum analyzer speeds up the process while bringing a number of other conveniences to this class of instrument, by William L. Hale, Gerald E. Weibel, pg 2-13 Precision Discriminator, pg 7 Permanent Waveform Storage, pg 9 Peak-Detecting Analog-to-Digital Converter, pg 10 Adapting a Sweep, pg 12 Optimum Sweep Rate, pg 12 A High-Performance Beam Tube for Cesium Beam Frequency Standards...the benefits are significant improvements in accuracy, short-term stability, settability, and sensitivity to external dc magnetic fields, by Ronald C. Hyatt, Louis F. Mueller, Terry N. Osterdock, pg 14-24 Appendix Short Term Stability, pg 23 Oct-1973 Cover: Model 5000A Logic Analyzer's two rows of 32 red light-emitting diodes display digital data occurring at the A and B inputs The Logic Analyzer: A New Instrument for Observing Logic Signals...designed specifically to solve digital design and troubleshooting problems, this new instrument provides a digital display with storage, positive and negative digital delay, combinatorial triggering and digital sequence comparison, by Mark Baker, Howard D. Marshall, Robin Adler, pg 2-16 Logic Analyzer Applications in Digital System Waveform Measurements, pg 5 The 1C Troubleshooters, pg 12 A Pulse Generator for Today's Digital Circuits...this new dual-output Pulse Generator produces 16V pulses at high repetition rates and with as much as 16V offset, a new control arrangement makes pulse set-up much simpler, by Horst Link, Reinhard Falke, pg 17-24 Nov-1973 Cover: A hand-held digital multimeter has finally become reality A Self-Contained, Hand-Held Digital Multimeter-A New Concept in Instrument Utility...aside from clipping the coiled lead to any convenient reference point, only one hand is needed to hold this instrument and take a reading, by Robert L. Dudley, Virgil L. Laing, pg 2-9 A Portable High-Resolution Counter for Low-Frequency Measurements...this snap-on functional module for the low-csot 5300 Measuring System makes six-digit measurements of frequencies between 0.833 Hz and 2 MHz with special features helping solve many low-frequency measurement problems, by Kenneth J. Macleod, pg 10-15 Operation of the Digital Programmable Frequency Generator, pg 14 A High-Speed Pattern Generator and an Error Detector for Testing Digital Systems...the rate at which errors occur in transferring digits through systems operating at bit rates as hgih as 150 M bits /s can be determined by a new Error Detector working with a new Data Generator, by James Robertson, John Stinson, Thomas Crawford, Ivan Young, pg 16-24 Dec-1973 Cover: The new Model 7155A Portable Strip-Chart Recorder A Go-Anywhere Strip-Chart Recorder that Has Laboratory Accuracy...this rugged, portable recorder is designed to operate in the laboratory, in a moving vehicle or aircraft, in the desert, in freezing temperatures, on battery power or ac of various frequencies, even upside down, always within its laboratory specifications, by Rick A. Warp, Howard L. Merrill, pg 2-8 Telecommunication Cable Fault Location from the Test Desk...this new fault locator automates Wheatstone-bridge methods that have fallen into disuse because they are too cumbersome with the results being that it has fast, easy fault location and better telephone service, by Thomas R. Graham, James M. Hood, pg 9-14 Appendix 4913A Sensitivity, pg 14 High-Efficiency Modular Power Supplies Using Switching Regulators...the switching regulators' advantages of smaller size and cooler operation used to be counterbalanced by higher cost, slower transient response and noise, both electrical and acoustical. These new power supplies reduce the disparity significantly, by B. William Dudley, Robert D. Peck, pg 15-20 1974 Jan-1974 Cover: Model 1601L Logic State Analzyer The Logic State Analyzer-Displaying Complex Digital Processes in Understandable Form...sixteen consecutive 12-bit workds from any part of a data stream are captured and held for display by a new Logic State Analyzer, greatly simplifying the task of monitoring program flow when troubleshooting complex digital processors, by William A. Farnbach, pg 2-9 A Laser Interferometer That Measures Straightness of Travel...this unique "straightedge" combines the high accuracy of the optical flat with the long range of the laser to achieve submicron resolution over ranges up to 100 feet , by Richard R. Baldwin, David A. Harland, Barbara E. Grote, pg 10-20 Machine Tool Calibration with the Expanded Laser Measurement System, pg 13 Ray-Trace Program, pg 16 Feb-1974 Cover: Model 1220A Oscilloscope Practical Oscilloscopes at Workaday Prices...15-MHz bandwidth, 2mV sensitivity, 3% accuracy, sweeps usable to 20ns/div and an 8x10 cm CRT with internal graticule would normally class these oscilloscopes as laboratory instruments but they will find wide use in the service shop, tech school and industry, by Hans-Gunter Hohmann, pg 2-10 A Data Error Analyzer for Tracking Down Problems in Data Communications...a combined data generator and self-synchronizing receiver, this new instrument makes six different measurements simultaneously, helping to pinpoint sources of trouble in data communications systems, by Jeffrey R. Duerr, pg 11-20 Laboratory Notebook: Sharp Cut-off Filters for That Awkward UHF Band, by James Larsen, Richard Dilman, Richard Tverdoch, pg 10 March-1974 Cover: Model 4271A Digital LCR meter An Automatic, Precision 1-MHz Digital LCR Meter...this new LCR Meter is especially designed for measurements of low-value components in integrated circuits and thin-film hybrid circuits, as well as of discrete components using a four-pair measurement technique to reduce errors caused by stray capacitance, residual inductance and mutal inductance of the test leads, by Kohichi Maeda, pg 2-9 Phase Error Compensation, pg 6 A Moderately Priced 20-MHz Pulse Generator with 16-Volt Output...suitable for general-purpose use, this instrument also has the pulse amplitude needed for driving the new CMOS circuits, by Rainer Eggert, Gunter Krauss, pg 10-15 Appendix A Capacitance Multiplier, pg 15 Laboratory Notebook: Logarithmic Amplifier Accepts 100-dB Signal Range, by robert Jeremiasen, pg 16-17 Versatile VHF Signal Generator Stresses Low Cost and Portability...this high-quality, reliable instrument fits the budget and the performance needs of a variety of users, by Robert R. Hay, pg 18-24 Specifying Signal Generator Noise, pg 21 April-1974 Cover: New 9880A/B Mass Memory System for the 9830A Calculator Mass Memory System Broadens Calculator Applications...inventory control, payroll, order processing and other large-data-base applications are now within the capability of HP's most powerful desktop calculator, the BASIC language Model 30, by Chris J. Christopher, Havyn E. Bradley, pg 2-12 Mass Memory for Business Applications, pg 4 An Easily Calibrated, Versatile Platinum Resistance Thermometer...unusual features of this digital thermometer are a choice of normal or expanded resolution, linear analog output, interchangeable probes, and many options including a battery pack and digital output, by Tony E. Foster, pg 13-17 APPENDIX Analog Linearization, pg 17 Speeding the Complex Calculations Required for Assessing Left Ventricular Function of the Heart...adapting computers to medical tasks has been slower than originally anticipated, going step-by-step as truley suitable tasks are identified and implemented. Here's another example of how a computer can help out when a suitable task is identified, by Peter Dikeman, Chi-Ning Liu, pg 18-24 May-1974 Cover: The HP-65 - a personal computer The "Personal Computer": A Fully Programmable Pocket Calculator...this 11 ounce battery-powered marvel has the computing power of an advanced scientific pocket calculator and is programmable as well, so it can adapt to any number of specialized uses, by Chung C. Tung, pg 2-7 A Self-Clocking Two-Track Recording Technique, pg 4 Programming the Personal Computer...wherein are revealed the functions of the keys, how problems are solved, and a bit of what goes on inside, by R. Kent Stockwell, pg 8-14 APPENDIX HP-65 Programmable Pocket Calculator Functions and Operations, pg 14 Designing a Tiny Magnetic Card Reader...here's how it was designed and how it works, by Robert B. Taggart, pg 15-17 Testing the HP-65 Logic Board...the board and its automatic test system are designed for rapid production testing and troubleshooting, by Kenneth W. Peterson, pg 18-20 Economical Precision Step Attenuators for RF and Microwaves...refinements in edgeline transmission structures and thin-film techniques lead to wideband step attenuators that are smaller and less expensive than previous models, by David R. Veteran, George R. Kirkpatrick, pg 21-24 June-1974 Cover: Model 5345A Electronic Counter that advances the art of pulsed RF frequency measurements with frequency averaging A New Generation in Frequency and Time Measurements...this new general-purpose electronic counter refines the art of frequency and time measurements to an impressive degree by the application of advanced technology, by James L. Sorden, pg 2-8 The 5345A Processor: An Example of State Machine Design, by Ronald E. Felsenstein, pg 9-11 Time Interval Averaging: Theory, Problems, and Solutions, by David C. Chu, pg 12-15 Third Input Channel Increases Counter Versatility, by Arthur S. Muto, pg 16-18 A Completely Automatic 4-GHz Heterodyne Frequency Converter, by Ali Bologlu, pg 19-21 Interface Bus Expands Instrument Utility, by Bryce E. Jeppsen, Steven E. Schultz, pg 22-24 July-1974 Cover: IMAGE, a sophisticated new database management system for HP 2100 and HP 3000 Computers, has information management capabilities formerly available only in large computer systems Powerful Data Base Management System for Small Computers...for the first time, sophisticated data management is available to the user of computers as small as the HP 2100 and HP 3000, by Richard E. McIntire, pg 2-10 Why Data Base Management Systems? , pg 5 Quality Frequency Counters Designed for Minimum Cost...lowest possible cost was a major design objective for these counters, but so were high quality, excellent performance, ease of service and efficient production, by Warren J. O'Buch, Lewis W. Masters, pg 11-14 A Versatile Bipolar Power Supply/Amplifier for Lab and Systems Use...the elements of a power supply/amplifier can be combined to perform as several different instruments: a precision bipolar power supply, a fast-responding programmable power supply, a low-distortion current-limiting power amplifier, a power amplifier with programmable gain, by Santo Pecchio, pg 15-19 An Automatic Exposure Control for a Lab-Bench X-Ray Camera...locating shorted bonding wires in IC's, checking pad alignment in multilayer circuit boards, and finding much other "inside" information becomes as easy as taking snapshots when you use an industrial x-ray system that has automatic exposure control, by John L. Brewster, pg 20-24 August-1974 Cover: Model 4940A Transmission Impairment Measuring Set Measuring Analog Parameters of Voiceband Data Channels...a new Transmission Impairment Measuring Set combines the measurement capabilities of six separate instruments into one portable package and does it in one-fourth the time formerly required, by Noel E. Damon, pg 2-7 Transient Measurements, by Paul G. Winninghoff, pg 8-9 The 4940A Sine Wave Transmitter, by Richard T. Lee, pg 9-11 Nonlinear Distortion Measurements, by Donald A. Dresch, pg 12-13 Envelope Delay Distortion Measurements, by Johann J. Heinzl, Richard G. Fowles, pg 14-16 Peak-to-Average Ratio Measurements, by Erhard Ketelsen, pg 17-18 Microwave Integrated Circuits Solve a Transmission Problen in Educational TV...an educational TV system using a satellite transmission link needs a state-of-the-art ground-station receiver that doesn't cost very much, by Arthur Fong, James A. Hall, Douglas J. Mellor, Richard D. Pering, pg 20-24 Direct-to-Schoolhouse Satellite Relay of Video Programs, pg 23 Sept-1974 Cover: Model 8082A Pulse Generator A 250-MHz Pulse Generator with Transition Times Variable to less than 1 ns...generating pulses at a 250-MHz repetition rate while giving the operator full control over the shape of these pulses requires microcircuit techniques, by Gert Globas, Eldon Cornish, Joel Zellmer, pg 2-7 Optimizing the Design of a High-Performance Oscilloscope...a wideband oscilloscope is more useful if its performance is not subject to variations that may degrade measurement accuracy. Its value is even more apparent if this consistent performance is achieved at moderate cost, both initial and long-term, by S. Raymond Kushnir, Thomas J. Zamborelli, P. Kent Hardage, pg 8-15 A Thin-Film/Semiconductor Thermocouple for Microwave Power Measurements...this device is what makes it possible for the 435A/8481A Power Meter to outperform thin-film and thermistor power meters, by Weldon H. Jackson, pg 16-18 Microelectronics Enhances Thermocouple Power Measurements...day-to-day microwave power measurement accuracy is substantially improved by this new thermocouple power meter system, without sacrificing the convenience of earlier thermistor instruments, by John Lamy, pg 19-24 Oct-1974 Cover: The HP 21 MX Series A User-Oriented Family of Minicomputers...HP's minicomputer section manager discusses the philosophy behind the design of this new computer series, by John M. Stedman, pg 2-6 The Value of User Microprogrammability, pg 4 Microprogrammable Central Processor Adapts Easily to Special User Needs...the 21MX processor maintains program and I/O compatibility with its HP predecessors, but has a new micro-instruction format that makes it easier to extend the instruction set, by Philip Gordon, Jacob R. Jacobs, pg 7-14 Testing the 21MX Processor, by Richard L. Hammons, Cleaborn C. Riggins, pg 10-11 All Semiconductor Memory Selected for New Minicomputer Series...considerations of cost, reliability, power, density and speed all pointed to the 4K RAM as the best choice, by Robert J. Frankenberg, pg 15-20 The Million-Word Minicomputer Main Memory, by John S. Elward, pg 19-20 A Computer Power System for Severe Operating Conditions...the power supply system of 21 MX Series Computers differs in many respects from the power supplies of other minicomputers. It is less vulnerable to poor ac line conditions than the supplies of most minicomputers of similiar size and cost, by Richard C. Van Brunt, pg 21-24 Nov-1974 Cover: A 9700A Distributed System Central Station collects data from two satellite automatic test systems dedicated to measurement tasks Distributed Computer Systems...as multiple minicomputers collect data, control processes, and run tests, a central computer system supports them all, gathering data, generating management reports, and performing other tasks at the same time, by Shane Dickey, pg 2-11 A Working Distributed System, pg 4 Satellites for Specific Applications, pg 8 RTE File Management Package, pg 10 Measurement of Amplitude and Delay Distortion, pg 11 A Quality Course in Digital Electronics...this practical approach to the teaching of digital integrated circuit principles includes hardware, a textbook and a 26-experiment laboratory workbook, by James A. Marrocco, Barry Bronson, pg 12-14 Simplified Data-Transmission Channel Measurements...synthesized signal generation and a dual time-interval measurement simplify evaluation of group delay and attenuation distortion in voice-grade telephone lines used for transmitting digital data, by David H. Guest, pg 15-24 A Group Delay Standard, pg 20 Dec-1974 Cover: The LED numeric display on this oscilloscope is an essential part of a new way of measuring very short time intervals Improved Accuracy and Convenience in Oscilloscope Timing and Voltage Measurements...timing measurements are made more easily and accurately with the dual-delayed sweep of a new oscilloscope. An internal microprocessor gives direct readout of time or voltage, greatly simplifying measurement procedures, by William B. Risley, Walter A. Fischer, pg 2-11 Laboratory Notebook: An Active Loop-Holding Device, by David H. Guest A Supersystem for BASIC Timesharing...this HP 3000 Computer System is optimized for BASIC language timesharing, but it also supports concurrent batch processing in BASIC, FORTRAN, COBOL, and SPL, by Nealon Mack, Leonard E. Shar, pg 12-17 Deriving and Reporting Chromatograph Data with a Microprocessor-controlled Integrator...printing retention times next to the peaks while plotting the chromatogram, a new integrator measures the chromatograph peak areas and, at the end of the run, derives concentrations and prints the analysis on the chromatogram, by Andrew Stefanski, pg 18-24 A Printing Plotter, pg 20 Adapting a Calculator Microprocessor to Instrumentation, by Hal Barraclough, pg 22 1975 Jan-1975 Cover: HP Product Manager, Jane Evans, with the HP Interface Bus The Hewlett-Packard Interface Bus: Current Perspectives...first announced over two years ago, the Hewlett-Packard Interface Bus has undergone refinements that make it suitable as a model for a proposed international standard, by Donald C. Loughry, pg 2-4 The HP Interface Bus, pg 3 HP Interface Bus Specification Summary, pg 4 Putting Together Instrumentation Systems at Minimum Cost...instrumentation systems that do useful work can be assembled around the HP Interface Bus at costs in the $15k to $25k range. Here is an approach to assembling such systems with a minimum amount of engineering time, by David W. Ricci, Peter S. Stone, pg 5-11 Recreatable Automatic Systems for the Lab, pg 6 Developing a One-of-a-Kind Automatic Test System, pg 9 Packaged Calculator-Based Measurement Systems, pg 11 Filling in the Gaps-Modular Accessories for Instrument Systems...these programmable modules provide such accessory functions as remote display, switching, digital-to-anallog conversion, and measurement pacing and timing., by Charles R. Trimble, Steven E. Schultz, pg 12-18 A Quiet, HP-IB-Compatible Printer that Listens to both ASCII and BCD, by Hans-Jurg Nadig, pg 14 A Multifunction Scanner for Calculator-Based Data Acquisition Systems, by David L. Wolpert, pg 17 Instruments for Use in HP Interface Bus Connected Systems, pg 17 Minimal Cost Measuring Instruments for Systems Use, by Lawrence P. Johnson, Gary D. Sasaki, pg 18 Visualizing Interface Bus Activity...connecting to the HP Interface Bus, a new analyzer listens to and displays the status of all bus lines for easy study of bus activity and it also serves as a talker, using programs in its internal memory to exercise bus-compatible instruments and systems, by Harold E. Dietrich, pg 19-23 Feb-1975 Cover: Two-bridge measuremening that's easy for the 7047A X-Y Recorder High-Sensitivity X-Y Recorder Has Few Input Restrictions...to match its high sensitivity, this new recorder provides 130 dB of common-mode rejection for virtually any input configuration. No external "guard" connection is needed unless the common-mode voltage exceeds ten volts peak, by Daniel E. Johnson, John M. Wade,Donald W. Huff, pg 2-9 APPENDIX I Analytical Expressions For Common-Mode Rejection Ratio and Noise Pump-Out Current, pg 8 Effects of Amplifier Offsets, pg 9 Digital High-Capacitance Measurements to One Farad...here's a new high-C meter capable of measuring today's wide-value electrolytic and tantalum capacitors. It's for production testing, incoming inspection and the laboratory, by Kunihisa Osada, Jun-Ichi Suehiro, pg 10-16 Computer Performance Improvement by Measurement and Microprogramming...the speed of a computer-based Fourier analyzer was increased by a factor of ten by creating several new machine language instructions using firmware, by David C. Snyder, pg 17-24 March-1975 Cover: New Model 86290A 2-to-18 GHz RF Plug-in installed in an 8620A Sweep Oscillator mainframe A High-Performance 2-to-18-GHz Sweeper...this precise, compact microwave sweep oscillator is a significant contribution to its field. The latest microelectronic and YIG technology makes it possible, by Carl J. Enlow, Paul R. Hernday, pg 2-14 A 2-18-GHz YIG-Tuned Multiplier, pg 6 A 2.0-6.2-GHz YIG-Tuned Oscillator, pg 8 A 2.0-6.2-GHz Power Amplifier, pg 11 Product Design of the 86290A, pg 12 How YIG Tuning Works, pg 13 Broadband Swept Network Measurements...vector and scalar measurements can be made from 2 to 18 GHz in one sweep by pairing the new 2-18-GHz sweep oscillator with other microwave instruments, by John J. Dupre, Cyril J. Yansouni, pg 15-17 The Dual Function Generator: A Source of a Wide Variety of Test Signals...FM signals, AM signals, dc levels, tone bursts, pulses and ramps, in addition to sine, square and triangular waves, are produced by this new dual-source function generator, by Dan D. Danielson, Ronald J. Riedel, pg 18-24 Variable Symmetry with Constant Frequency, pg 20 April-1975 Cover: Model 5305A, a new low-cost compact, portable 1100-MHz frequency counter A Portable 1100-MHz Frequency Counter...this new addition to the 5300 Measuring System is well suited for checking out land mobile communications and aeronautical navigation equipment, by Hans J. Jekat, pg 2-8 An Eight-Digit Mainframe for the 5300 Measuring System, pg 6 A New 5-GHz Transistor Process, pg 8 Big Timer/Counter Capability in a Portable Package...this 75-MHz, eight-function universal timer/counter is another snap-on module for the low-cost, compact 5300 Measuring System, by Kenneth J. Macleod, pg 9-13 A Universal Autoranging System for a Universal Timer/Counter, pg 11 A High-Current Power Supply for Systems that use 5-volt IC Logic Extensively...this switching-regulated power supply gives 100A at 5 V with 70% efficiency. A heat-removal system allows compactness without loss of reliability, by Mauro Difrancesco, pg 14-19 Band-Selectable Fourier Analysis...frequency resolution in selected bands can be as much as 100 times better than conventional baseband Fourier analysis, by H. Webber McKinney, pg 20-24 May-1975 Cover: Model 3551A Telephone Test Set An Understandable Test Set for Making Basic Measurements on Telephone Lines...this new portable test set uses a digital processor to present direct-reading, autoranged measurements of level and frequency, substantially reducing operator errors, by Michael B. Aken, David K. Deaver, pg 2-9 A Function Generator with a Well-Defined Output, pg 6 A Computer System for Analog Measurements on Voiceband Data Channels...besides making nine data-channel performance tests automatically in less than two minutes, this new Transmission Parameter Analyzer is capable of a much broader range of measurements, by Roger F. Rauskolb, Stephen G. Cline, Robert H. Perdriau, pg 10-17 Portable Transponder Allows Two-Way Data Channel Measurements, pg 16 Hewlett-Packard Instruments for Checking Voice-Grade Telephone Lines, pg 17 A Precision Spectrum Analyzer for the 10-Hz-to-13-MHz Range...adaptable to automatic systems or bench use, a new spectrum analyzer has measurement resolution of 0.01 dB, pass-bands as narrow as 3 Hz, and a dynamic range of 70 db, by Jerry W. Daniels, Robert L. Atchley, pg 18-24 Attenuating the Classical Attenuator Problem, pg 22 June-1975 Cover: Model 2640A Interactive display terminal using its optional line-drawing character set to display a form to be filled in by the operator Cost-effective, Reliable CRT Terminal is First of a Family...microprocessor control and modular design result in a computer terminal that is powerful and flexible, yet low in cost, by James A. Doub, pg 2-5 The HP 2640A At Work as a Data Entry Terminal, pg 4 A Functionally Modular Logic System for a CRT Terminal, by Arthur B. Lane, pg 6-10 A High-Resolution Raster Scan Display, by Jean-Claude Roy, pg 11-15 2640A Sweep System, pg 14 2640A Power Supply, pg 15 Firmware for a Microprocessor-controlled CRT Terminal, by Thomas F. Waitman, pg 16-19 Testing the HP 2640A, pg 19 A Microprocessor-Scanned Keyboard, by Otakar Blazek, pg 20-21 Packaging for Function, Manufacturability, and Service, by Robert B. Pierce, pg 22-24 Designing the Engineering Foam Plastics, pg 23 July-1975 Cover: Model 5328A Universal Counter and its optional input modules Modularity Means Maximum Effectiveness in Medium-Cost Universal Counter...a single mainframe and a wide choice of optional timer, counter, and DVM modules provide better performance at lower cost, meet each user's needs precisely, and leave room for future growth, by Bruce S. Corya, James F. Horner, pg 2-8 Mechanical Design of an Option-Configurable Counter, pg 6 Using a Modular Universal Counter...here's what the various features of the new Model 5328A Universal Counter can do for the user, by Alfred Langguth, William D. Jackson, pg 9-14 Three-State Trigger Lights, pg 10 HP-IB Option Fits Simple or Sophisticated Systems Applications, pg 13 Synthesized Signal Generator Operation to 2.6 GHz with Wideband Phase Modulation...new plug-ins give the Model 8660-series Synthesized Signal Generators programmable operation to 2.6 GHz and a capability for phase modulation, by Young Dae Kim, James A. Hall, pg 15-20 Phase Modulation, pg 18 Applications of a Phase-Modulated Signal Generator...once a capability is made available, applications emerge, so here are a few that have been found for the phase-modulated synthesized signal generator in HP's own labs, by James A. Hall, pg 21-24 Measuring Modulation Linearity, pg 23 Aug-1975 Cover: Multichannel is the byword as new test instruments are developed in response to the accelerating rush to digital electronic The Logic State Analyzer, a Viewing Port for the Data Domain...a new logic state analyzer has expanded capabilities that speed the location of the sources of problems in digital systems and broaden the range of problems that can be