I am not sure how this will work out..............the main thing is that you
need a hard limited signal at the LO input of the detector. It may require a
crystal filter.......I am not sure yet. As it stands right now, even input
noise with not antenna connected will provide that hard limited signal, so I
don't think that weak signal reception will be a problem. Since this is a
quasi-sync detector, there is no lock problem. I should know in the next
couple of days.

Pete

RFCOMMSYS wrote in message
...
said:


I have never used the sync detect mode. I don't even use it on my
SW8 or my AOR7030. I know that many folks like this function, so it is a
worthwhile thing to design into the receiver.
I am not sure how well this circuit will lock, so it may just be a first
pass at most. Still, signals won't be fading into the noise floor of the
system; the atmospherics will be the determining factor.



In my opinion, a synch detector that keeps losing lock on problem signals
is
useless. Like another poster in this thread said, if you can't design a
good
synch detector (apparently it's not easy to do considering that ICOM can't
seem
to do it), I would rather have manual ECSS ability (SSB mode with an
extremely
fine tuning (preferably analog) knob)).