CPE issues

Hello, I am having a problem with my CPE. This is the second one to delevop this problem.
It connects at a signal of -60 then three days later the signal jumps to -93 or over without the CPE direction being changed. Its it a problem with the wireless card or what? and how do I rectify this. The CPE is on a 15m tower… and I can not be going up to remove it each time. Is there another option?

Have you tried to ping it for a while & then check signal. When not in use, the signal seems to drop to -90+ but when traffic is flowing, it comes back. Don’t know if it’s supposed to be like that, I just noticed it on some of my units.
Ekkas