Frequency demodulator for television receiver with time multiplexing

摘要: A receiver is provided for a television system which uses time division miplexing (TDM) of analog image signals and bursts duobinary coded digital data signals. The are transmitted during the line frame blanking intervals grouped together in packets, comprising sound synchronization signals, spectral width required by part being greater than that part. comprises common frequency demodulator adaptive as function signal-to-noise ratio after demodulation less optimum when latter has high ratio. an input filter either or may be adjusted response to error rate.