Best wireless setting at high noise regions

Hi everybody
can you help me to set my link parameter at a region which has a very high noise
i m using 2 RB912 for my link

Show us spectral history

it is not avialable
int wi spectral-history wlan1
failure: allowed ranges [4910; 6110]

The Syntax is:

Spectral-history range=xxxx-xxxx

Fill in the channels which are allowed to you
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