This paper analyzes reason of measure waveform produce error in decode circuit, put forward experiment means of adopt closed circuit television system transmit signal.
分析了在解码电路实验中，测量波形产生误差的原因，提出了采用有线电视系统传送信号的实验方法。
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After the signal is processed through a low-pass filter, a very realistic waveform is obtained which can show pulsed nature, frequency, amplitude and bandwidth of television picture signals.