MEASURING_AF_DISTORTION

Published:2009/6/30 22:08:00 Author:May | From:SeekIC

Passive highpass 1-kHz filter is used with audio millivoltmeter to improve accuracy of distortion measurements for low-impedance sources at 1 kHz.Filter removes low-frequency noise from input signal and compensates for loss of harmonic frequency. Applications include setting bias and recording levels of tape recorder. Adjust R1 for best null, then ad just R2 and value of C to equalize responses at harmonics.-J. B. Cole, Passive Network to Measure Distortion, Wireless World, Jan. 1978 p 60.



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