ADS-B Signal

Hi all
Rfscan shows no cells at all 800 - 1400 yet I have noise
Nearing my max aircraft and Ranking is still rising
are these graphs normal 1 hour 6 hour and 1 day
they all look different but should be the same
is their room for improvement
gain is set at 36.4 to get the best output via optimizer

Screenshot_306Screenshot_307Screenshot_308

there is no noise displayed in these graphs.

the red bars are a count of messages with a signal level that is almost too strong.

Oh well i never
many thanks for that it all makes sence now