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HI Warren,<br>
<br>
Very interesting you mentioned the use of transverters.<br>
I'm running several transverters (and mosfet PA's with it) in
combination with Hermes and it would be very nice<br>
if I would be able to get just 'some' improvement for the IMD
performance there.<br>
I also heard of the completely new written DSP in hpsdr and I hope
this will be revealed soon.<br>
So this can be 'critically tested', this long Dutch winter, h.i.<br>
<br>
<br>
Thanks anyway for the huge amount of work, and improvements to
HPsdr, you do and already did for the HPSDR comunity,<br>
<br>
Bert PA2XHF<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Warren C. Pratt schreef op 16-11-2013
10:56:<br>
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Hi Nige,<br>
<br>
The pre-distortion must be turned on by the user to be active --
so, there is no requirement to use it. In fact, I expect that
many people will not establish the feedback path that is required
to calibrate. However, it would be interesting to try using it
with transverters. For it to function correctly with a
transverter, the receive down-conversion path would have to be
very linear to provide valid feedback for calibration. <br>
<br>
Also, note that the pre-distortion is "adaptive"; it calibrates to
correct the amplifier in use. No specific amplifier
characteristic is assumed in the code.<br>
<br>
73,<br>
Warren NR0V<br>
<br>
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<div class="moz-cite-prefix"> <br>
On 16/11/2013 09:56, Warren C. Pratt wrote:<br>
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Hi Nige,<br>
<br>
The pre-distortion must be turned on by the user to be active --
so, there is no requirement to use it. In fact, I expect that
many people will not establish the feedback path that is
required to calibrate. However, it would be interesting to try
using it with transverters. For it to function correctly with a
transverter, the receive down-conversion path would have to be
very linear to provide valid feedback for calibration. <br>
<br>
Also, note that the pre-distortion is "adaptive"; it calibrates
to correct the amplifier in use. No specific amplifier
characteristic is assumed in the code.<br>
<br>
73,<br>
Warren NR0V<br>
<br>
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