Michael,
When properly adjusted per the GM300 RSS Manual 6880902Z36, the
deviation limit is set using an 800 mV tone at 1 kHz, injected into the
BNC connector on the programming cable. An 800 mV signal is far higher
than any voice level, and it ensures that the audio limiter is
saturated.
The deviation should be adjusted in the Service Menu first without any
PL or DPL using F6, then with PL using F7, and finally with DPL using
F8.
You can select between two levels of microphone gain by positioning
Jumper JU651. The details are in the GM300 Service Manual 6880902Z32.
I really like the GM300's design, which mixes in the PL modulation after
the voice audio limiter, thereby eliminating one of the major causes of
repeater talk-off due to CTCSS tone compression.
73, Eric Lemmon WB6FLY
mbloom0947 wrote:
>
The Moto GM300 has a software programmable deviation level with the
software setting from 0 to 55 on an arbitrary scale. I thought that by
lowering the deviation level I would see limiting in the deviation
level given the same microphone input. Instead, I see the deviation
level responding to the setting but no peak limiting. Am I doing
something wrong? Or are my expectations wrong?
>
> Michael Bloom
> W7RAT
>
>
> Yahoo! Groups Links
>
>
>
>
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