[Elecraft] KSYN3A Synthesizer problem?

[Jim Brown]

On Mon,4/6/2015 4:01 PM, Roger D Johnson wrote:
> 500 kHz  -127 dbm
> 400         -127
> 300         -124
> 200         -113
> 100         -93
>
> That's a 34 db increase in noise level!! Is this the way the new 
> boards are supposed to work? 

Is this with or without an antenna connected?  What's the nature of the 
noise on your spectrum analyzer? Broadband or with humps every 10-20 
kHz? Do the peaks drift? Remember that our world is full of switch-mode 
power supplies spewing out trash on harmonics of their square waves, and 
the lower we go in frequency, the stronger they are.

73, Jim K9YC