[Elecraft] P3 Measurements with new K3SYNA Boards

[Jim Brown]

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