Tim S. wrote:
> What's the best way to adjust the transmit deviation for a repeater.
>
> I was thinking of doing it this way.
>
> Setup the service monitor for duplex mode and hook the cable up to the
> antenna port on the duplexer.
>
> Manually key the transmitter and adjust the PL for .6 kHz deviation.
>
> Then adjust the generator for a 1k tone at kHz deviation with a PL tone at
> 6khz deviation.
>
> Then watching it on the duplex monitor adjust for 3.6 kHz (with .6 being the
> TX pl) on the transmitter.
>
> -Tim
Leave the tone turned off first.
If you have any way to put a local mic on the tx, or generate audio
DIRECTLY into the mic input, set the deviation on the transmitter for
maximum deviation, usually +/-5Khz (For ham rptrs, I set it up to abt
5.5 to keep folks from going into limiting normally. Ideally, a normal
user with reasonable audio should not go into limiting very often.)
Then go back and generate 1Khz @ +/-3Khz deviation, and set the repeat
level for "3 in, 3 out.". It helps at this point to do a audio sweep and
plot in/out deviation across the audio spectrum. Then, with no other
mod, set the PL for +/-600-800 hz.
--
Jim Barbour
WD8CHL
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