I sit corrected. Sorry if my info misled anyone.
They tried to mimic the Micor squelch without the Micor chip. I've never had
one work that way, possibly because I'm not using the internal repeater
configuration.
Bob M.
======
--- On Thu, 3/19/09, nj902 <wb0...@arrl.net> wrote:
> From: nj902 <wb0...@arrl.net>
> Subject: [Repeater-Builder] Re: MSF5000 Squelch
> To: Repeater-Builder@yahoogroups.com
> Date: Thursday, March 19, 2009, 4:59 PM
> --- In Repeater-Builder@yahoogroups.com,
> "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.)
