In the course of connecting my new TKR-850 to my Arcom RC210
controller I found out that the repeater's "Squelch Control" ouput is
not actually a CTCSS squelch signal, it is a COS signal only. In
other words, the "SC" pin goes from 5v to 0v whenever ANY signal is
on the receiver channel, whether or not it has the right CTCSS with
it. The CTCSS is enabled for the channel in the programming (173.8),
but it only cuts off the audio. The CTCSS enable is not reflected on
the repeater's SC pin. When I change to the wrong CTCSS code on my
handheld, the receiver speaker is quiet, and no audio gets to the
controller, but the "busy" light on the front lights and the SC pin
goes to 0v.
I cannot see any other output pin for CTCSS enable ... so my option
appears to be either to use an external CTCSS decoder or to find a
signal in the receiver that does reflect the true CTCSS enable state.
Anyone deal with this issue on a TKR-850?
Thanks! Jim K7RNR
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