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本仪器在制造中,虽采取了一系列保证质量的措施,但仍不可避免地在使用过程中出现故障.熟练掌握该仪器的基本工作原理,加之一定的维修实践就能达到迅速、正确地排除故障的目的.一、原理概述PS-43型数字频率计主要功能是测量无线电信号的频率和周期.在测量前者时,被测信号由A通道输入,经放大整形后,加到由“控制单元”输出的门控信号控制的主门,在规一化时间内通过的脉冲个数由8位“十进位计数单元”计得,即为频率.测量后者时,被测
The instrument in the manufacturing, though taken a series of measures to ensure quality, but still inevitably in the process of failure. Proficiency in the basic working principle of the instrument, combined with certain maintenance practices can be quickly and correctly excluded The purpose of the failure I. Principle Overview PS-43-type digital frequency meter main function is to measure the frequency and period of the radio signal in the former measurement, the measured signal from the A channel input, after amplification and shaping, by the “control Unit ”output gated signal control of the main door, the number of pulses passed in the normalized time by the 8-bit “ decimal count unit ”is the frequency measurement of the latter, the measured