Spectral Averaging and Low-Frequency Sampling Modifications for the IQS 401 FFT (Fast Fourier Transform) Spectrum Analyzer.

Abstract

The IQS 401 spectrum analyzer, a commercial addition to the Apple II & III personal computers, can be modified for low-cost power spectrum measurements of random noise signals and similar waveforms. The IQS BASIC control program is changed to perform low-frequency sampling, spectral averaging and spectrum scaling. External analog filtering must be provided on the lowest sampling rates; however, no change is made to the original IQS hardware. Resolution of 0.5 dB is obtainable from 0.0001 Hz to 20 kHz. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1984
Accession Number
ADA141181

Entities

People

  • Stanley W. Smith

Organizations

  • University of Utah

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Engineering
  • Chemistry
  • Computers
  • Engineering
  • Fast Fourier Transforms
  • Jet Propulsion
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • New Jersey
  • New York
  • Power Spectra
  • Spectrum Analyzers
  • Standards
  • United States
  • Universities

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Radio communications and signal processing.