Scheduled System Maintenance
On Friday, October 20, IEEE Xplore will be unavailable from 9:00 PM-midnight ET. We apologize for the inconvenience.
Notice: There is currently an issue with the citation download feature. Learn more.

IEEE Transactions on Instrumentation and Measurement

Issue 4 • Dec. 1969

Filter Results

Displaying Results 1 - 25 of 28
  • [Front cover]

    Publication Year: 1969, Page(s): c1
    Request permission for commercial reuse | PDF file iconPDF (33 KB)
    Freely Available from IEEE
  • IEEE Instrumentation and Measurement Group

    Publication Year: 1969, Page(s): c2
    Request permission for commercial reuse | PDF file iconPDF (170 KB)
    Freely Available from IEEE
  • Table of contents

    Publication Year: 1969, Page(s): 245
    Request permission for commercial reuse | PDF file iconPDF (171 KB)
    Freely Available from IEEE
  • Preface

    Publication Year: 1969, Page(s): 246
    Request permission for commercial reuse | PDF file iconPDF (59 KB)
    Freely Available from IEEE
  • Measurement of Nonlinear Phase Distortion in Microwave Limiters under Dynamic Conditions

    Publication Year: 1969, Page(s):247 - 251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2444 KB)

    Nonlinear phase distortion (amplitude-modulation to phase-modulation conversion) in microwave limiters can be different under static and dynamic conditions. A technique for measurement of dynamic phase distortion is described in which a two-tone test signal is used to simulate amplitude modulation with modulating frequencies of the order of megahertz. The two-tone test signal is generated by linea... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frequency-Domain Interpretation of Oscillator Phase Stability

    Publication Year: 1969, Page(s):251 - 261
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2192 KB)

    A frequency-domain interpretation of the phase stability of an oscillator is discussed. From a knowledge of the time dependence of an oscillator phase during a time interval T* it is possible to give the characteristics of this oscillator, not only for this time interval, but also for subsequent time intervals. Since the use of a Fourier transform for the computation of a continuous power spectrum... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Application of the Compensated Current Comparator to the Calibration of Current Transformers at Ratios Less than Unity

    Publication Year: 1969, Page(s):261 - 265
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    A technique is described for extending the range of the compensated current comparator so that it may be used for calibrating current transformers at ratios both greater and less than 1/1. The concept of providing compensation windings for both the primary and secondary ratio windings is introduced and a new method of correcting for the capacitance error due to burden is presented. Details on how ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Direct-Current-Comparator Bridge for Measuring Shunts up to 20000 Amperes

    Publication Year: 1969, Page(s):266 - 271
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2259 KB)

    A direct-current-comparator bridge for calibrating four-terminal resistors or shunts at currents up to 20 000 amperes is described. Measurements can be made at up to full rated current of the shunts so that the effects of the load coefficient are included. The resistor under test is compared with a reference resistor of higher value by measuring the ratio of the currents through the two resistors ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Detection of Shifts in the Values of Saturated Standard Cells Used as References

    Publication Year: 1969, Page(s):271 - 276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1429 KB)

    A method of analyzing data taken in routine comparisons of a test group of saturated cells to a reference group, so that shifts in the electromotive forces of individual reference cells may be detected, is explained. Limitations on the minimum number of reference cells adequate for close tracking of cells under text become apparent from examination of data, as do the advantages of knowing precisel... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ratio Comparisons of Impedance Standards

    Publication Year: 1969, Page(s):276 - 283
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1765 KB)

    The application of a readily assembled comparator circuit, previously used in the comparison calibration of inductive and resistive voltage dividers, has been extended to cover the comparison of impedance standards. As an example requiring the most stringent performance from the circuit, the comparison of four-terminal inductance standards and their absolute determination in terms of the unit of c... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Semi-Automatic Method for the Precision Measurement of Microwave Impedance

    Publication Year: 1969, Page(s):283 - 289
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1997 KB)

    A system is described for the measurement of the magnitude and phase of the reflection coefficient over wide frequency bands. The method consists of recording the voltage at several points along the standing-wave pattern in a coaxial line. A fixed probe is used and the distance between the probe and the load is altered by successively inserting several lengths of precision coaxial line. Knowing th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Octave-Band Microwave Phase Comparator

    Publication Year: 1969, Page(s):290 - 294
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1685 KB)

    A simple apparatus for measuring the relative phase difference between two signals of identical frequency anywhere within an octave band at microwave frequencies is described. Instantaneous measurements can be performed upon carriers that are periodically 100 percent modulated by narrow pulses since no mechanical contrivances are required. Phase information is converted by detectors into four chan... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer Applications for Parameter Control and Data Processing in a Metrology Laboratory

    Publication Year: 1969, Page(s):294 - 299
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1511 KB)

    A computer-oriented program for control and dissemination of measurement parameters as applied in a metrology laboratory is described. The program includes the capability for automated data readout of certain measurement systems as process inputs, computer storage and statistical analysis of "absolute" values of fixed standards, computer data computation incorporating all known information on meas... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer Augmented Oscilloscope System

    Publication Year: 1969, Page(s):299 - 306
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3413 KB)

    The Computer Augmented Oscilloscope System (CAOS) is a laboratory-computer terminal intended for experiments involving waveforms and their interpretation. The terminal is portable and can be used wherever telephone access to a suitably programmed computer is available. The CAOS laboratory equipment includes a sampling oscilloscope with a storage CRT, the terminal proper, and a telephone line conne... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automatic Transformation of Curved-to-Flat Calibration Lines by a Normalizer

    Publication Year: 1969, Page(s):307 - 316
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2471 KB)

    In high-accuracy swept-frequency insertion-loss testing, antenna-pattern measurement, and many other applications, significant measurement-system output variations are caused by the system itself. These variations can be recorded and subtracted from the measurement results to provide the required accuracy generally by recording system calibration lines with attenuation standards in the test positi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Digital Walsh-Fourier Analysis of Periodic Waveforms

    Publication Year: 1969, Page(s):316 - 321
    Cited by:  Papers (18)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1188 KB)

    A digital process is described for obtaining the Walsh-Fourier series of a periodic waveform, which requires at most two cycles of the waveform under measurement. The first cycle of the periodic waveform is required for the determination of period. The coefficients of the Walsh-Fourier series are obtained during the second cycle only, and they are available at the end of the cycle. Given the Walsh... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Finding the RMS Value of a Fading Signal Directly and Quickly from Its Decibel Values

    Publication Year: 1969, Page(s):321 - 326
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1155 KB)

    Two methods are proposed for obtaining the rms value of a fading signal directly and quickly from its decibel values. The level-crossing-rate method shows that the rms values of most kinds of signals are within 3 dB above the signal levels at which their maximum level crossing rates occur. The direct method shows that the difference between the average of a decibel-scale fading-signal datum and th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Attenuation of a Pulsed Field by a Conducting Sheet

    Publication Year: 1969, Page(s):326 - 330
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (905 KB)

    Instruments that produce pulsed eddy currents in metals have been used to measure the thickness of one metal on another and to determine the properties of metals. The currents are produced by a pulsed dipole, which is surrounded by a conducting mask with a small aperture near the metal to concentrate the field and thus provide better resolution. A pickup coil near the metal is used to detect the c... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Broad-Band Remote-Sensing Magnetometer

    Publication Year: 1969, Page(s):330 - 335
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3263 KB)

    A broad-band remote-sensing magnetometer system has been developed for measuring fast-rising pulsed magnetic fields. Broad frequency response is achieved by frequency modulating a 1.5-GHz microwave carrier for transmission from the sensor to a remotely located receiver. The primary field probe is a ferrite-loaded coil, which produces a current proportional to the magnetic-field intensity. This cur... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On a Class of Capacitively Tuned Transducer Oscillators

    Publication Year: 1969, Page(s):336 - 340
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1059 KB)

    A class of transducer oscillators is characterized by a tuning method that exchanges short-term for long-term stability, and accepts both single and differential tuning sensor capacitances. When the tuning method is applied to a restricted class of RC oscillators, the relation between tuning capacitance and oscillator period can be made linear. The effect of amplifier phase shift and distortion is... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Simple Pulse-Height Analyzer for Partial-Discharge-Rate Measurements

    Publication Year: 1969, Page(s):341 - 345
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1877 KB)

    A single-channel pulse-height analyzer with suitable pulse-shaping circuits designed for partial-discharge measurements is described. The circuit of the pulse-height analyzer has a basic resolution limit of 1.5 μs. The unit may be used in conjunction with an RLC-type partial-discharge-detection circuit and is thus applicable to discharge measurements on high-voltage apparatus such as trans... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IF Return-Loss Measurements in Microwave Radio Systems

    Publication Year: 1969, Page(s):346 - 352
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2713 KB)

    The basic designs and several applications of a ferrite-core transformer bridge that realizes a directivity better than 60 dB are described. The bridge is intended for use in IF return-loss measurements of microwave and satellite systems operating from 50 to 100 MHz. The bandwidth of the unit extends from 5 to 200 MHz. The main feature of the balanced transformer is the use of a symmetrical primar... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Instrumentation-The Future

    Publication Year: 1969, Page(s):352 - 361
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3668 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Contributors

    Publication Year: 1969, Page(s):361 - 364
    Request permission for commercial reuse | PDF file iconPDF (4439 KB)
    Freely Available from IEEE
  • Abstracts of Other Papers

    Publication Year: 1969, Page(s):365 - 367
    Request permission for commercial reuse | PDF file iconPDF (621 KB)
    Freely Available from IEEE

Aims & Scope

Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief

SHERVIN SHIRMOHAMMADI
School of EECS
University of Ottawa
800 King Edward Ave.
Ottawa, Ontario
K1N 6N5 CANADA
Fax: 613-562-5664
shervin@discover.uottawa.ca