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１引言电视解调器是测试电视发射机技术指标必不可少的一种贵重精密测量仪器。通常用它来将射频电视信号中的视频及音频信号不失真地解调出来，然后辅以其它仪器测试电视发射机伴音通道及图像通道的整机技术指标。EMFP是R＆S公司２０世纪９０年代中期的产品，具体型号名称为“T
1 Introduction TV demodulator is a kind of precious precision measuring instrument which is indispensable to test TV transmitter technical index. It is usually used to demodulate the video and audio signals in the RF television signal without distortion, and then complemented with other instruments to test the technical indicators of the TV channel sound channel and the video channel. EMFP is R & S’s mid-90s of the 20th century, the specific model name is "T