[hpsdr] Atlas based HPSDR PureSignal

[Bruce Beford]

Hi George.
No, we cannot use the DC voltage from the SWR bridge on Alex. We need to
feed back a sample of the actual RF waveform to the receiver ADC on Mercury
for pre-distortion compensation to work. This will require a separate
coupler or "sniffer".
Regards,
Bruce N1RX

> Hi Phil,
> actually, in Atlas based systems there is an Alex transmit board with a
> RF power directional coupler installed. These dc voltages from the
> coupler provided at the 4-pin connector, could they be used for
> predistortion? Or do we need an additional coupler when all the
> modifications you described are done?
> 72, Georg, dl2kp




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