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VHF电视信号发生器无线电爱好者在检修电视机时都希望有一台电视信号发生器、以便分析电视机是高频部分有毛病,还是视放部分有问题。这里介绍一种利用收录机来产生VHF高频信号以检查电视机的小仪器。装置的电路工作原理见图33所示,将录有500Hz方波信号的
VHF TV signal generator Radio enthusiasts are hoping to have a TV signal generator in the course of servicing TV sets in order to analyze whether the TV is defective at high frequencies or have some problems with video playback. Here’s a small instrument that uses a radio to produce VHF high-frequency signals to check the television. The working principle of the device circuit shown in Figure 33, will be recorded 500Hz square wave signal