The P3 averages power, not amplitude, so using longer averaging times just smooths the display and doesn't reduce random noise.
John W1FV -----Original Message----- From: Topband [mailto:topband-bounces+john.kaufmann=verizon....@contesting.com] On Behalf Of Jim Brown Sent: Thursday, February 25, 2021 8:03 PM To: topband@contesting.com Subject: Re: Topband: FW: The WD8DSB mini-flag antenna (LONG!) 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 _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
