数字电视发射机组成及故障维护

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摘  要：电视节目能否顺利播出，与数字发射机的稳定性密切相关。做好数字发射机的检修与维护工作，才能保证节目的顺利播出。文章主要针对数字电视发射机的原理组成，功放单元的故障维护，做一些简单的介绍与维护心得。

关键词：地面数字电视发射机;功放;工作原理;故障维修

中图分类号：TN949.197 文献标志码：A          文章编号：2095-2945（2022）07-0041-03

Abstract： Whether TV programs can be broadcast smoothly or not is closely related to the stability of digital transmitters. The overhaul and maintenance work of the digital transmitter is intended to ensure the smooth broadcast of the program. This paper mainly introduces the principle and composition of the digital TV transmitter， as well as the fault maintenance of power amplifier unit， and gives a simple introduction to maintenance experience related to the digital TV transmitter.

Keywords： terrestrial digital TV transmitter; power amplifier; working principle; fault maintenance

随着广播电视技术的发展，模拟电视节目因套数少、接收信号质量差等原因，已逐渐退出历史舞台，应运而生的节目套数多、画面质量高、抗干扰能力强的数字电视节目逐渐走进千家万户。（剩余5031字）