--- In [email protected], [EMAIL PROTECTED] wrote:
"...I had an idea to replace the remote receiver with a repeater on
another frequency and link the two together. Is there an easy
(reliable?) way to link them over the existing radio loop? ..."
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The optimum solution would be to contact your carrier and ask if the
existing 2-wire voice grade line could be upgraded to a 4-wire line
with E&M interface. It is possible that the monthly charges for such
a circuit would not be much different than what you have now.
The E&M signalling capability would be used to cross-connect COR from
each end to PTT at the other end.
If E&M cannot be obtained, a 4-wire voice grade circuit would still be
preferable to the existing 2-wire circuit, as it would simplify your
interfacing. You would use a tone keying widget at each end [driven
by COR] to key the station at the other end.
Your existing Quantar can work with this concept since it has the
wire-line interface option [it must have this to connect to the
comparator]. Your new station should also have wire-line capability.
One other issue to consider is your dispatch connectivity. If the
console is connected by wire-line to a console priority module in the
Spectra-Tac voter, that makes the interfacing a little more
interesting. If the dispatch point communicates with the repeater via
RF [a control station] that simplifies things.
Obviously there is an issue for your users who now must remember which
geography [coverage area] they are in and set their radio accordingly,
although Motorola does offer "Voting Scan" on some mobile and portable
products. Here is what they have to say about that:
"in a Voting Scan system, several repeaters re-broadcast the same
transmission simultaneously on different frequencies; the radio is
then able to select the strongest/clearest signal."
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