--- In [email protected], "Bob M." <msf5kg...@...> wrote:
"... The MSF5000 squelch is a single-level noise-based squelch system, much like the MaxTrac and most mobile radios. The squelch-tail duration is fixed. ..." ............................................................. Incorrect. Since the original post referred to a CXB station, the operation of the squelch circuitry in the SSCB is as follows: The receiver squelch switching circuit operates in two modes. With a weak signal just above the opening sensitivity, squelch closing is slow (approximately 150 ms.) which results in the long squelch tail heard at the end of a received message. The long squelch tail is present to prevent the received message from being chopped during a weak fluttering signal. With a strong signal (approximately 10 dB above opening sensitivity), a squelch closing occurs immediately after the end of a received signal. This prevents the squelch tail from being heard. ... The repeater squelch detector circuit is very similar to the receiver squelch detector. (repeater slow squelch closing time is approximately 200 ms.)
