4525 SMs with significant signal changes

DigitalMan2020 · July 17, 2026, 5:20am

Hi all, running 5.12 RC33 on 4500 AP and mix of AC and AX SMs. Having some significant rssi swings on SMs with no obstructions or misalignment…

Here is a Force 300 25, 22:00 DL -66, UL -64/ 05:00 DL -79, UL -77, 08:00 DL -67, UL -65

Here is a 4525, 20:00 DL -66, UL -59, 03:00 DL -79, UL -72

aka · July 17, 2026, 1:35pm

Hi @DigitalMan2020 ,

what about the spectrum analyzer?
Could you PM me techsupport files from AP and SMs where you see the swings?

Thank you!

DigitalMan2020 · July 19, 2026, 6:01pm

Will do Andrii, here is the last 7 days from a SM (its actually my SM on my house) and my SM is connected to a different 4500 AP on a different tower and I am seeing the swings.

As per the graph I had a substantial drop overnight

terintamel · July 20, 2026, 3:30am

What is your terrain and environment? To me this looks like thermal fade. Where I am at I see this the most during June-July from certain SMs. Our area is mostly flat land, but we have many fields with crops that give off significant heat and humidity along with it being very humid here as of late.