Posted on Feb 5, 2014

Circuit generates low-frequency waveform whose amplitude is equivalent to that of unknown r-f voltage, using photochopper modulator VI-V2 as error detector. Arrangement gives seven voltage ranger from 10 my rms to 10 v rms full scale, over frequency range of 500 kc to 1, 000 Mc. -T. C. Anderson, Measuring Low-Level R-F Voltage with Servo Feedback Te

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chniques, Electronics, 34:28, p 63-65.

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