[hpsdr] Comments on setting up PureSignal

[Ken N9VV]

One method I have used is to MONITOR my spectrum, not on my "screen", 
but using a totally separate SDR-IQ receiver and whip antenna on another 
computer. I hope that this inexpensive solution gives me an unbiased 
view of what my RF really looks like.
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Reminds me of Novice days in 1960 when I had a separate "RF powered" 
diode oscillator that helped me know the difference between my SIDETONE 
and what my RF really sounded like. When using a bug (with scratchy 
bouncing contacts) I was amazed at how my real signal sounded. It gave 
me a great opportunity to learn about how to de-bounce my bug :-)
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GL de Ken N9VV

On 2/26/2014 10:16 AM, Owen, Michael wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Dear friends,
>
> Thanks to Brian for his articulate explanation.  I love to read his stuff!  To add one point: the two-tone test results that are viewed on the screen reflect what the radio's processor sees, not necessarily what is going to the antenna.  In other words, if the radio's internal leakage is greater than the sampled RF from an external amplifier, then that's mostly what you will see on the screen.  You won't see whatever distortion is being added by the amplifier.  Therefore, you may think that you have terrific IMD performance when in fact it's not so good at all.
>
> W9IP
>

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