On 05/21/2012 10:06 AM, [email protected] wrote:
> Would 'our' modem be able to cope with the pre/de-emphersis present in the
> TX/RX path of many radios? (the icom D-Star module UT-118 plugs in 'ahead'
> of these).
We might have to put in a way to configure this, but yes.
There are three potential inputs for this microphone:
SSB audio input, which is essentially baseband. I think not
pre-emphasized in general.
FM audio input with pre-emphasis, potentially compression, and
limiting.
"9600" input to an FM transmitter, which is a more clean path to
the modulator.
And three corresponding outputs:
SSB audio, with BFO, and hopefully all post-processing settings
like DSP and noise blanker turned off.
De-emphasized FM audio output.
9600 output from the discriminator of an FM receiver.
Thanks
Bruce
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