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IEEE Transactions on Instrumentation and Measurement

Issue 3 • Sept. 1977

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Displaying Results 1 - 25 of 28
  • Table of contents

    Publication Year: 1977, Page(s): c1
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    Freely Available from IEEE
  • IEEE Instrumentation and Measurement Group

    Publication Year: 1977, Page(s): c2
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    Freely Available from IEEE
  • Introduction

    Publication Year: 1977, Page(s): 197
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    Freely Available from IEEE
  • Automated Astroposition Determination Using Sensor Array Systems

    Publication Year: 1977, Page(s):197 - 200
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1610 KB)

    A new method to determine the astronomic longitude is described. The standard optical micrometer of the T-4 theodolite is substituted by an optical sensor array system that is placed in the focal plane of the T-4. The image of a star is projected on the sensor array and converted into an electrical signal. The signal is consequently processed in a signal processor and accurately recorded. The sign... View full abstract»

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  • Introduction to Autotestcon '76 Papers

    Publication Year: 1977, Page(s): 200
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    Freely Available from IEEE
  • Hardware-Software Tradeoffs for Analog Automatic Test Instruments

    Publication Year: 1977, Page(s):201 - 203
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1329 KB)

    This paper will show that in general the cost and reliability of ATE analog instruments are improved if hardwired logic is minimized and software is given the task of step-by-step control of these instruments. Test speed is perhaps the most important parameter that may be adversely affected by this tradeoff. However, by careful design of the ATE software system, test speed for software-controlled ... View full abstract»

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  • Avionics-Universal Connector Tester

    Publication Year: 1977, Page(s):203 - 206
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3099 KB)

    A universal connector has been developed as an electrical interface between automatic testers and the avionics packages and their modular subassemblies. This universal connector incorporates spring-loaded zero-entry contacts with compliant tips. This single interface will electrically connect a large assortment of connectors with different pitch, row spacing-in-line or staggered, various contact d... View full abstract»

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  • Higher Reliability for Hybrids and Printed Circuit Boards by Functional Thermal Testing

    Publication Year: 1977, Page(s):207 - 210
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2539 KB)

    Thermal cycling of functioning electronic assemblies has proven to be a means to enhance field-reliability. This paper describes a unique testing device which proved to be both practical and cost-effective for performing rapid thermal cycling on automatic test equipment (ATE). By using liquid nitrogen for quick cooling and the resulting inert gas as the media to be blown across electronic assembli... View full abstract»

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  • Automating FM Noise Measurements

    Publication Year: 1977, Page(s):211 - 214
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (898 KB)

    With the proliferation of spectrally pure RF sources the developers of RF test systems have been faced with the problem of verifying this spectral purity, particularly the FM-noise sideband power levels associated with these sources. The PLL discriminator is one possible solution; however, its major drawback is that is requires a frequency source with spectral purity characteristics which are bett... View full abstract»

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  • Microcomputer-Controlled Precision Pneumatic Pressure Generator

    Publication Year: 1977, Page(s):214 - 217
    Cited by:  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (946 KB)

    An increasing variety of avionics require precision pneumatic pressure stimuli during organization and intermediate maintenance. The accuracy and long-term stability requirements approach the best mercurial standards. Pressure stimuli must be coordinated and varied at precise rates that are beyond the frequency response of mercury columns and many electromechanical sensors. Test systems are freque... View full abstract»

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  • Local Memory for a High-Speed Digital Test System

    Publication Year: 1977, Page(s):217 - 220
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (913 KB)

    The choice of RAM or SR memory as local memory dictates many of the characteristics of a high-speed digital test system. This paper examines the impact of the choice on test program efficiency, test speed, and system cost. Understanding this impact is important to anyone testing PC boards containing dynamic LSI devices, such as microprocessors. View full abstract»

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  • A Broad-Band Impedance Indicator Employing a Phase-Shift Keying Modulator

    Publication Year: 1977, Page(s):220 - 224
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1802 KB)

    A novel homodyne scheme for implementing a broad-band impedance indicator is proposed. It features a simple form made possible by using a modified quarternary phase-shift keying as a subcarrier modulation method. This method allows both the amplitude and the phase of a signal to be detected simultaneously by one single-ended mixer. A prototype indicator has assured the swept-frequency measurement ... View full abstract»

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  • Generation of EM Susceptibility Test Fields Using a Large Absorber-Loaded TEM Cell

    Publication Year: 1977, Page(s):225 - 230
    Cited by:  Papers (9)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2619 KB)

    This paper discusses the development of an electromagnetic simulator for accurate generation of broad-band suspectibility test fields within a shielded environment. The simulator consists of a large, 3 m X 3 m X 6 m, rectangular transverse electromagnetic (TEM) transmission cell that is loaded with RF absorber to suppress multimoding at frequencies above the cell's waveguide cutoff or resonant fre... View full abstract»

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  • The Dynamic Response of a Resonant Frequency Tracking System

    Publication Year: 1977, Page(s):231 - 237
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1489 KB)

    A study of a resonant frequency tracking system, to be used in measurement systems where the sensing element is a resonant structure is presented. The tracking system was used to lock an oscillator to the resonant frequency of a cavity operating in the X-band. The resonant frequency of the sensor was assumed to be a function of the quantity being measured. A theoretical analysis of the resonant fr... View full abstract»

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  • Evaluation of a Wide-Band Method for the Measurement of the Reflection Coefficient of Microwave One-Port Networks

    Publication Year: 1977, Page(s):238 - 242
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1174 KB)

    A method for measuring the magnitude and phase of the reflection coefficient of one-port networks is described. The measurements can be extended over wide frequency bands by stepping the signal frequency through the band. The measured value is referred to the impedance of solid conductor air-dielectric transmission lines which are considered primary standards of impedance. An error evaluation has ... View full abstract»

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  • Thermal Noise of Transmission Media

    Publication Year: 1977, Page(s):243 - 245
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (491 KB)

    A method of calculating the thermal noise of transmission media was developed. Mathematically, it was demonstrated that there is a unique, fundamental equation that describes the thermal noise of all transmission media in terms of the temperature and the signal attenuation constant of each medium. View full abstract»

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  • A Fault-Detection System for Digital Integrated Circuits

    Publication Year: 1977, Page(s):246 - 251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1117 KB)

    A system has been developed for the detection of most commonly occurring faults in digital IC's. Such faults consist of either permanent ("stuck-at") logic levels at input or output terminals, or short-circuits between adjacent terminals in a microcircuit. In the test system to be described both input and output terminals are simultaneously analyzed under quasi-optimum test patterns. The input and... View full abstract»

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  • A Cycle-Slip Detector for Phase-Locked Demodulators

    Publication Year: 1977, Page(s):251 - 254
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (777 KB)

    Thresholding in a phase-locked demodulator occurs because of cycle slipping between the received signal and the VCO of the PLD. Measurement of rate of occurrence of slips should be an elegant and sensitive method of determining the threshold of a PLL. It is surely a much simpler procedure than attempting to measure output SNR, particularly if the modulation is anything other than a simple sinewave... View full abstract»

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  • A Digital Special-Purpose Signal Processor for Two-Phase Flow Real-Time Analysis

    Publication Year: 1977, Page(s):254 - 257
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (974 KB)

    In the statistical study of two-phase flow real-time control of experiments is often needed. Furthermore, in industrial processes involving boiling units control or two-phase gas-liquid transport control, real-time signal processing is required to check the status of two-phase flows. An instrument is described for the measurement of the fundamental characteristic parameters of two-phase flows. The... View full abstract»

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  • Reactive Power Meter for Nonsinusoidal Systems

    Publication Year: 1977, Page(s):258 - 260
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (619 KB)

    This paper describes a novel reactive power meter realized by electronic circuits that determine successively the terms of the equation Q = ¿n=1¿VrIrsin¿r for n significant harmonics. The harmonic contributions to the total reactive power is determined by electronic simulation of the mathematical expression that sets the orthogonal condition of two functions in a periodical interval. Partial re... View full abstract»

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  • Application of the Piezoelectric Capillary Injector in Analog Recording

    Publication Year: 1977, Page(s):260 - 262
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1335 KB)

    A piezoelectric capillary injector is considered. It has been used instead of the pen in an analog recorder. The advantage with this method is that the amount of ink can be modulated and the line width becomes independent of pen and paper speeds. For this purpose the frequency of the electric pulses to the injector has been modulated by the pen and paper speeds and the results are compared with th... View full abstract»

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  • Determination of Current Transformer Errors at Primary Currents up to 100 000 A

    Publication Year: 1977, Page(s):263 - 267
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1059 KB)

    A method is described for testing precision current transformers, particularly devices with very high values of rated primary current and rated secondary currents up to 200 A. It makes use of the well-known differential method (Arnold, Hohle), substituting, however, the common resistor with an electronic operational amplifier, thus yielding an almost negligible resistance and a very high sensitivi... View full abstract»

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  • New Method for Measurement of Electric-Field Distribution on Semiconductors

    Publication Year: 1977, Page(s):267 - 269
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (509 KB)

    New electric-field measuring equipment was constructed. The electric-field distribution was obtained from potential distribution measured by a single capacitive probe through numerical calculation by a microcomputer. The single capacitive probe was fabricated with the technique of vacuum evaporation of aluminum and SiO. The electric-field distribution under acoustoelectric current oscillated state... View full abstract»

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  • Misalignment of Coaxial Conductors

    Publication Year: 1977, Page(s):270 - 272
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    Compressed gas insulated coaxial transmission lines are being developed which withstand 1200-kV rms phase-to-phase voltage and carry 3000 A continuous current. As a method of instrumenting the voltage on a single-phase of coaxial line, an isolated capacitive section approximately one meter in length is inserted between the conductors. The resulting displacement current due to line voltage is detec... View full abstract»

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  • Corrections to "A Precision Nuclear Quadruple Resonance Thermometer"

    Publication Year: 1977, Page(s): 272
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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.

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SHERVIN SHIRMOHAMMADI
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University of Ottawa
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