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I_F_WITH_LOW_PASS_FILTER

2017-02-13 18:58  
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I_F_WITH_LOW_PASS_FILTER
Cutoff frequency of signal-channel amplifier for frequency-measuring spectrum analyzer is 15 cps with RC fiber as shown and 125 cps when switch grounds lowest filter lead.-C. W. Wilson, Phase-Locked Marker Improves Spectrum Analyzer's Accuracy, Electronics, 39:3, p 88-92.