Rob,
The input impedance of either the front panel mike input, or the
external mike input on Pin 2 of the Accessory Connector, is 560 ohms.
Both inputs are factory-set at 14mV for 3kHz deviation, but the gains
can be adjusted in CPS.
The above information was found in Paragraph 2.3.2 of the CDM Detailed
Service Manual, 6881091C63.
> Rob & Chris wrote:
>
> Can anyone tell me what the input impedance for the accessory Mic input is on
> a CDM-750 UHF or how much drive it takes to get 3kHz deviation? I am trying
> to hook one up to use for an autopatch and cannot get enough drive from the
> patch to be useful. I suspect an impedance mismatch. I don't have any doc
> for the things and Moto's web site isn't any help.
Thanks -Rob-
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