On 2/25/2021 2:29 PM, John Kaufmann via Topband wrote:
The P3 noise measurement bandwidth was about 100 Hz in my measurements.
I hope that everyone realizes that setting a high value for averaging
cancels non-correlated noise in spectrum displays, including the
waterfall, greatly increasing the visibility of correlated signals and
noise. Correlated can be understood as non-random, and includes nearly
all ham transmission modes and most electronically generated noise like
computer clocks, trash from electronic power handling and switch-mode
power supplies.
73, Jim K9YC
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