[Ground-station] Lime LMS8001a Companion Board

[Mike Seguin]

Hi Ron,

Just finished a bit of testing here as well. I don't seem to see the 
spurs you are seeing. (maybe try a different VCO Freq?)

My test was at 5.8 GHz. On the LMS8001a I used 4.85 for VCO. Then drove 
the IF with 950 MHz from an HP 8921A. Level was +6 dBm

Spectrum analyzer was an Anritsu MS2721b 7 GHz unit.

Reference level was -16.8 dBm. There was a 20 dB pad on the output of 
the LMS8001a.

10 kHz marker shows a delta of -62.82 dBm in 1 kHz RBW, so for dBc/Hz 
subtract 30 dB.

The on-board 40 MHz reference is off a bit, but easy to lock down using 
an external reference.

I want to verify the measurements this coming weekend if I can at 
W1GHZ's lab. Also check 10 GHz.

Mike
-- 

73,
Mike, N1JEZ
"A closed mouth gathers no feet"
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