一种用于卫星电视时间比对的秒脉冲信号提取器

A 1-PPS Signal Extractor Used for Satellite-TV Time Comparison

为了获得稳定、可靠的卫星电视时间比对数据,成功研制了以秒信号提取器为主要部件的新一代卫星电视时间解调器。介绍了秒脉冲信号提取器的设计原理,详细阐述了钳位电路、采样保持电路和数字延迟电路的设计思路。对采用新的解调器和采用旧的解调器的卫星电视秒信号监测系统所得到的比对数据进行了分析,结果表明新的电视时间解码器的性能得到明显提高。

In order to obtain stable and reliable satellite-TV time comparison data, a new-generation of demodulator, in which a signal extractor for the 1-PPS （1 pulse per second） of satellite-TV time signal is the main part, has been developed successfully. In this paper, the design principle for the 1-PPS extractor is introduced, and the design clues for the clamper, sampling-holding circuit and digital-delay circuit are expounded in detail. The time comparison data obtained with the satellite-TV time signal measure system equipped with the new demodulator and the data obtained with the measure system equipped with the old demodulator are analyzed, and the results indicate that the performance of the new demodulator is much better than that of the old one.