[hpsdr] Hermes/Penelope/PenneLane Tx Noise?

John radio at mediacombb.net
Sat Jan 19 16:43:26 PST 2013

Years ago I used to measure IMD on Collins equipment.  Their specs at 
that time were always in dB below each of two equal tones.  If you think 
about it the peak of the envelope with only two equal tones is twice 
each tone peak value, so Collins spec was more conservative than other 
manufacturers of that time.

In those days the spectrum analyzer and two tone oscillators took up a 
full single bay rack (on wheels) called a 478R-1.

John  WoGN

On 1/19/2013 4:21 PM, Lyle Johnson wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> Hello!
> Has anyone done a broadband tx noise plot of any of the above exciter 
> boards?  I'm particularly interested in 80m, 20m and 6m.  If you have 
> such plots, I'd be very interested in seeing them.
> Not yet set up in my lab to make these sorts of measurements.
> Thanks in advance,
> Lyle KK7P
> _______________________________________________


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