January 1967 v.18 n.5
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
[Author:] Charles G. Gorss, pg 10
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 broad frequency range, by Gerald J. Alonzo, Hirsh V. Marantz, Richard H. Blackwell, pg 12-20. 4800A, 4815A.
Design Philosophy of Vector Impedance Meters, pg 15
[Authors:] Gerald J. Alonzo, Richard H. Blackwell, Hirsh V. Marantz, pg 20
February 1967 v.18 n. 6
An Advanced Nw Network Analyzer for Sweep-measuring Amplitude from 0.1 to 12.4 GHz, by Orthell T. Dennison, Richard W. Anderson, pg 2-10. 8410A, 8411A, 8413A, 8414A, 8740A, 8741A, 8742A.
The Engineer, Automated Network Analysis and the Computer – Signs of Things to Come, by Paul C. Ely, Jr., pg 11-12
[Author:] Paul C. Ely, Jr., pg 12
S-Parameter Techniques for Faster, More Accurate Network Design, by Richard W. Anderson, pg 13-22.
See Also: Correction: Two equations in the table on pages 23-24 in “S-Parameter Techniques for Faster, More Accurate Network Design” contain incorrect signs, page 8 in the March 1967 issue
Useful Scattering Parameter Relationships, pg 23-24
March 1967 v.18 n.7
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. 2116A.
[Author:] Kay B. Magleby, pg 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. 2116A.
A Wideband Analog Frequency Meter and FM Discriminator, by Peter R. Roth, pg 13-18. 5210A, 5210B, 1053A.
[Author:] Peter R. Roth, pg 18
Phase Noise and Phase Modulation Measurements with the Analog Frequency Meter, by Peter R. Roth, pg 18-20
Correction: Two equations in the table on pages 23-24 in “S-Parameter Techniques for Faster, More Accurate Network Design”, page 13 in the February 1967, issue contain incorrect signs, pg 8
April 1967 v.18 n.8
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. 5260A, 5240A.
[Author:] Robert L. Allen, pg 6
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. 2832A, 2833A, 2801A.
[Author:] Albert Benjaminson, pg 12
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
[Authors:] A. Michael Cowley, Jack H. Lepoff, pg 15
May 1967 v.18 n.9
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. 4950A, 4918A, 118, 4905A, 116, 117, 4917A.
[Author:] Robert L. Allen, pg 9
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. 3410A.
Typical Applications of -hp- Model 3410A, pg 12-14.
[Author:] Raymond C. Hanson, pg 15
Using a Precision AC Amplifier for Measurement and Calibration. Good gain accuracy and low distortion in a general purpose amplifier make it possible to extend the range of many instruments, by Rex James, pg 16-20. 463A.
[Author:] Rex James, pg 18
How the -hp- Model 463A Amplifier is Calibrated, pg 19
June 1967 v.18 n.10
Cover: Electronic Monitoring of Hospital Patients
The Role of Electronic Medical Instrumentation in Patient Monitoring, by H. Ronald Riggert, pg 2-11
[Author:] H. Ronald Riggert, pg 11
Precision Thin-Film Coaxial Attenuators. Semi-automated thin-film techniques yield attenuators that are exceptionally 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. 8491A, 8491B, 8492A, 354A.
[Author:] Stephen F. Adam, pg 18
International Units, Multiple and Submultiple Prefixes, pg 20
July 1967 v.18 n.11
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 many innovations in this new eight-channel recorder, by Robert A. Sanderson, pg 2-12. 7848A.
[Author:] Robert A. Sanderson, pg 11
Signal Conditioning Preamplifiers for Ink Recorder, pg 10. 8800 Series.
Advantages of Direct-Coupled Differential Data Amplifiers, by Morton H. Levin, pg 13-16. 8875A, 2470A.
[Author:] Morton H. Levin, pg 15
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
[Author:] Richard Y. Moss, pg 20
August 1967 v.18 n.12
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
[Authors:] Ian T. Band, Ed A. Hilton, Max J. Schuller, pg 4
High-Accuracy Laser-Interferometer Camera for IC Masks, by Don M. Cross, pg 5-8
[Author:] Don M. Cross, pg 8
Integrated-Circuit Counters. Here is a designer-eye view of the impact of integrated circuits on electronic counters. Two new IC counters are described, by John W. McMains, Thomas P. O’Brien, pg 9-13. 521A, 5221A, 5211A, 524A, 5216A.
[Authors:] John W. McMains, Thomas P. O’Brien, pg 11
Semiautomatic System for Production Testing of Electronics Circuits, by Emil E. Olander, Jr., Dee L. Larson, pg 14-20
[Authors:] Emil E. Olander, Jr., Dee L. Larson, pg 16
September 1967 v.19 n.1
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. 3722A.
[Authors:] George C. Anderson, Brian W. Finnie, Gordon T. Roberts, pg 14
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
October 1967 v.19 n.2
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
[Authors:] Norman R. Galassi, Bernard S. Siegal, pg 8
Digital Frequency Synthesizer Covering 0.1 MHz to 500 MHz in 0.1 Hz Steps, by Alexander Tykulsky, pg 10-13. 5105A., 5110B.
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
[Authors:] Al Tykulsky, Bob Maldewin, pg 16
Transform Methods for Linear System. This is a highly condensed collection of reference material on transform methods, by Michael O’Flynn, Professor of Electrical Engineering, San Jose State College, pg 17-20
November 1967 v.19 n.3
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
[Author:] Wolfgang E. Ohme, pg 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 12-20. 8051A, 15109A.
[Authors:] Heinz Blasser, Helmut Finckh, pg 19
Loudness Analyzer aids Noise Reduction, Production Testing, Speech Analysis, pg 15
1968 UTC Offset Announced, pg 20
December 1967 v.19 n.4
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
[Author:] Charles House, pg 6
Factors in Designing a Large-Screen, Wideband CRT, by Milton E. Russell, pg 10-11
[Author:] Milton E. Russell, pg 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.
See Also: Correction to “’Flying Clock’ Comparisons Extended to East Europe, Africa and Australia”, by Leonard S. Cutler, page 10 in the March 1970 issue
Flying Clocks, pg 17