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
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