TECHNICAL MANUAL Navy Calibration Program Instrument Calibration Procedure AG-51 A.F. SIGNAL GENERATOR SG-21/U

摘要

This procedure describes the calibration of the SG-21/U Signal Generator, herein referred to as the Test Instrument.nThe Test Instrument is a precision audio frequency signal source which delivers signals of any of 26 fixed frequencies between 10 and ' 500 cps. The frequencies are generated by a rotating disc-photocell arrangement driven by a tuning fork stabilized oscillator.nThe over-all regulation stability is tested by monitoring:the output frequency while the line voltage is varied between 105 and 125 volts.