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随着数字压缩技术的发展,我国卫星广播电视已从过去的模拟传输方式进入目前的数字传输方式。中央台的各套节目及各省、市、自治区卫星上行节目绝大多采用数字压缩方式传送。本文主要阐述了为保证高质量的接收数字压缩卫星信号所需要考虑的理论测算过程和实际调试中容易遇到的问题,并以江苏广播电台的卫星转播信号由亚3S调整到鑫诺1号为例,介绍了通过使用频谱分析仪来精确接收窄带数字压缩卫星信号的方法。
With the development of digital compression technology, China’s satellite radio and television have entered the current digital transmission mode from the analog transmission mode in the past. The CCTV’s various programs and satellite uplink programs in all provinces, municipalities and autonomous regions are mostly transmitted by digital compression. This paper mainly expounds the theoretical calculation process to be considered in order to ensure high-quality digital satellite signal reception and the problems easily encountered in actual commissioning. The satellite broadcast signal from Jiangsu Radio Station is adjusted from Sub-3S to Xinnuo-1 Example, describes a method of accurately receiving narrowband digitally compressed satellite signals by using a spectrum analyzer.