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问1:怎样调试前端设备?答:前端设备调试的任务是测量与调整各频道的信号电平、A/V比、视频调制度和音频频偏,其他设备指标在出厂前已经仔细调试,这里可不考虑。其调试步骤一般是:先调天线放大器,再调前端信号处理设备(调制器或频道处理器),最后统调前端输出电平。具体调试前,应熟悉各设备的性能及调试方法,并应仔细检查各设备连接是否正确,各连接有无断路及短路情况,各插接器是否良好。检查无误后,方可通电。
Q: How to debug the front-end equipment? A: The front-end equipment debugging task is to measure and adjust the signal level of each channel, A / V ratio, video modulation and audio frequency deviation, other equipment indicators have been carefully debugged before leaving the factory, consider. The debugging steps are generally: first tune the antenna amplifier, readjust the front-end signal processing equipment (modulator or channel processor), and finally adjust the front-end output level. Before commissioning, familiarize yourself with the performance and commissioning methods of each device and carefully check the connection of each device for correctness, whether the connections are open or short-circuited, and whether the connectors are good. Check the correct, before power.