[Elecraft] P3 Measurements with new K3SYNA Boards

[Phil Wheeler]

Oh oh, Jim: We need a P3A :-)  Good you took this on.

73, Phil W7OX

On 7/27/15 10:05 PM, Jim Brown wrote:
> I finally got around to repeating a few 
> measurements using with the new K3SYNA boards. 
> I've added the results near the beginning of 
> P3_Spectrum_Measurements.pdf
>
> There's also a measurement of an un-keyed, 
> unmodulated carrier.
>
> Executive summary -- the screen of the P3 can 
> display only 80 dB of dynamic range, and within 
> that displayed range, I cannot see any 
> difference in signal bandwidth between the new 
> synth board and the old one. There ARE 
> differences, and I've seen measurements showing 
> significant reduction in phase noise, but it's 
> another 10-20 dB down from the peak.
>
> It would be possible to see those differences by 
> lowering the P3 reference level, letting the 
> upper 20 dB of dynamic range run off scale. I've 
> done that with the new K3SYNA boards, but did 
> not do so with the older K3SYN, so I have noting 
> to compare to. :)
>
> Note that the only new measurements in the file 
> are those showing the K3 steady carrier and a K3 
> sending dits at 25W for comparison with older data.
>
> 73, Jim K9YC