This is what I do. Then I read the noise level in dBm from the screen. Very
useful to compare noise levels at different times, etc.
But what I would like is a menu command that could be assigned to one of the
function keys to automatically compute the average noise level and then adjust
the
Hi Martin,
I have a somewhat different solution to your problem, and it consists of
multiple parts.
First, I set averaging to maximum (I set it years ago, don't ask me
numbers). :)
Second, I set Scale to 24 dB when I'm not contesting, 32 dB for 100W
contests, 42 dB for high power
I'm not all that familiar with the Flex stuff but in some SDR software
display systems it is possible to adjust the waterfall sensitivity and
contrast independent of any spectrum bandscope position adjustment. It
is often also possible to have any signal levels indicated by such
displays bear
Hi Jim,
They may be automatically calculating a long-term-average noise floor, then
subtracting it from the waterfall. The P3 could do the same thing. But
automatic noise subtraction would have the same disadvantage as slow AGC: a
temporary rise in the noise floor would mask weak signals for
I saw a demo last night of the FlexRadio bandscope. It showed the noise
well above, on the Y-axis, the bottom of the display, but the waterfall
didn't show the noise, just the signals on the band.
When I set the REL LVL on my P3 so the noise floor is below the noise, the
waterfall is blue
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