[hpsdr] Pure Signal RF Sampler

[Scott Traurig]

It may be worth adding that, within reason, higher feedback signal levels
are better than lower ones. That way the ratio of feedback signal to any
crosstalk signals that might exist remains as high as practical.

73,

Scott

On Wed, Sep 5, 2018 at 3:02 PM Richard Grubb <richard.n.grubb at comcast.net>
wrote:

> Thanks Scott.
>
> The resistive coupler I built is peculiar to the contents of my Junk Box.
> I used a series parallel arrangement of 9 half watt metal film resistors in
> three parallel - series groups and a 51 ohm terminator to provide -51 dB
> coupling and the necessary voltage and power rating for 1 kW. It is flat to
> a dB or so from 160 - 6m. Actually the Pure Signal 2 implementation is very
> non critical on sample levels. The software is completely happy with the
> linear enabled at 800 - 1000W. However turning the linear off and just
> having 5W from the ANAN 10, although the software flags low level, it still
> reduces the IMD by ~30 dB. Kudos to 16 bits of dynamic range. A great piece
> of software ! Thank you HPSDR programmers !!
>
> It might be worth including a note on the alternatives here in the Power
> Signal documentation.
>
> 73, Dick W0QM, G3FNL
>
>
>
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