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SPECTRUM_ANALYZER_FILTER

2017-02-18 03:55  
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SPECTRUM_ANALYZER_FILTER
Designed to study dynamic data recorded as frequency-modulated signals on magnetic tape. Filter circuit values give 1, 2, and 4-cps bandwidth in analyzer. Thermocouple in squarer has time constant of 1 sec so output is filtered as well as squared. Outputs of thermocouples are in series to provide summing. D-c amplifiers prevent loading of filters,-T. B. Fryer, Frequency Analyzer Uses Two Reference signals, Electronics, 32:18, p 56-57.