A Microcomputer-Based Sampling Digital Voltmeter.

Abstract

This report describes a sampling digital voltmeter developed at the Underwater Sound Reference Detachment of the Naval Research Laboratory. It consists of a PDP-11/23 microcomputer with up to three channels of analog-to-digital converters capable of making simultaneous measurements on pulsed or continuous sinusoids at frequencies up to 100 kHz. The voltmeters is controlled by ASCII commands on the IEEE-488 bus. Statistical parameters (mean, peak, standard deviation, and second joint moment) are computed using numerical integration. Sinusoidal parameters (amplitude, phase, and harmonic distortion) are computed using single-frequency discrete Fourier transforms (SFDFT). The digital filtering resulting from the use of the SFDFT can be further enhanced by optional data sequence weighting (multiplying the sequence by a given windowing sequency). Computation times may be reduced by optional subsequence averaging. Complete assembly language listings for the voltmeter program are included and described.

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Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1983
Accession Number
ADA126980

Entities

People

  • James D. George
  • Richard E. Scott Jr.

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Computations
  • Computer Programming
  • Computer Programs
  • Computers
  • Data Transmission
  • Discrete Fourier Transforms
  • Distortion
  • Frequency
  • Host Computers
  • Measurement
  • Military Research
  • Personal Computers
  • Plastic Explosives
  • Sine Waves
  • Spectral Lines
  • Underwater Sound

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Approximation Theory.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.