Circuit with separating filter measuring interference pulses - uses frequency band in interference pulse spectrum which is separated and excluded from analogue signal

摘要

the interference pulses are generated during operation by bit errors, and appear at the receiver analogue output of a digital signal transmission system. A measuring device (9) for analogue signals is connected to the analogue input through a parallel separating filter (8) which selects, for the measurement only the frequency band from the spectrum generated by the interference pulses. This frequency band is excluded from the analogue signal. The filter (8) is pref. a narrow band, low frequency pass type.