TECHNICAL MANUAL Navy Calibration Program Instrument Calibration Procedure AG-43 AN/URM-25, AN/URM-25A, AN/URM-25C, RF SIGNAL GENERATOR SETS

摘要

1.1 This procedure describes the calibration of the AN/URM-25, AN/URM-2SA, AN/URM-25B, and AN/URM-25C RF Signal Generator Sets, which are designed to produce radio frequency signals that are continuously variable from 0.1 to 100,000 microvolts, modulated or unmodulated, over a continuous frequency range of 10 kc to 50 Mc. The instrument being calibrated will be referred to herein as the Test Instrument.n1.2 The Test Instrument consists primarily of a crystal oscillator, an RF oscillator, 400 and 1000 cps audio oscillators, an output multiplier and EVM, and a regulated power supply.n1.3 Bach Test Instrument function is tested to verify its correct performance within the required tolerances, as follows.