[hpsdr] Predistortion and different types of amplifiers?

[Warren C. Pratt]

Hi John,

I'd say give it a try and let us know how things go.  My recommendation 
would be to let the tuner do its tuning and AFTER THAT enable 
AutoCalibrate.  I suspect it will work fine.  You may want to increase 
the Amplifier Delay parameter a bit to compensate for the extra delay 
through the tuner.  If the tuner begins to tune with AutoCalibrate ON, 
you might get some very strange and negative results because some 
samples for calibration may be collected at a different tuner setting 
than others in the same set.

73,
Warren  NR0V

On 2/12/2014 2:12 PM, John Marvin wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> I noticed that the documentation shows that the rf sampler should be 
> connected between the power amp output and the antenna tuner. In my 
> case I'd like to try seeing what PureSignal can do with an Elecraft 
> KXPA100 amplifier. However, the amp has the antenna tuner built into 
> it. What effect will having the antenna tuner in the path have? I can 
> easily believe I would need to recalibrate each time the tuner changes 
> its settings.
>
> Thanks,
>
> John
> AC0ZG
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