I'm in the early feasibility stage of moving an OEM repeater from
single-site to multiple receivers and a central control/transmitter.
The receivers will probably be linked to the control/transmitter site
via microwave POTS quality audio channels; NO direct DC control.
One fairly critical requirement that has me concerned is the need to
be able to selectively disable remote receiver PL from the control
site.
Without a "back channel" (I'm not sure there is one so I'm planning
worst case) to permit the control site to send a PL disable signal to
the remote(s).
It is also unlikely that the link will pass most (any?) PL tones.
So... how might one best carry a PL detect signal along with the
remote receiver audio?
Restated;
PL detection but NOT PL squelch control in the remote.
PL detect signal (expressed as an audio tone?) sent to central site
along with remote receiver audio.
Central site selectively passes remote audio based on presence of PL
"signal" to the voter.
Is there an accepted / commercial solution or will this become a
"project"?
Thanks in advance,
Bill - WB1GOT
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