TITLE

Spectral averaging and low-frequency sampling modifications for the IQS 401 fast Fourier transform spectrum analyzer

AUTHOR(S)
Smith, Steven W.
PUB. DATE
January 1985
SOURCE
Review of Scientific Instruments;Jan1985, Vol. 56 Issue 1, p159
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The IQS 401 spectrum analyzer, a commercial addition to the Apple II and 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 10-4 Hz to 20 kHz.
ACCESSION #
9782729

 

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