A5c High PER Question


#1

One of our A5c’s has been seeing high PER. Is this usually an RF environment issue or can this be corrected with making changes to our configuration?


#2

Hi Christopher,

PER of 8-10% is not atypical in WiFi Interop, especially with high client counts or when one or more clients can’t hear each other when contending for spectrum. You might try SRS mode as a test for this.

Looking at your Network Spectrum view in the cloud, there is significant interference (> -50 dBm) on two of the clients that may be causing the problem as they attempt to contend for airtime in WiFi Interop. I see you have since changed channels and reduced channel width since the post above (which has helped), but the new channels also have interference at the clients.


#3

@Chris is there a document that explains how SRS works?


#4

Hi Christopher,

Yes, here is a link to the SRS application guide: http://ap.help.mimosa.co/srs-overview


#5

Hi Chris,

I’m getting a similar problem were UL PER is jumping up to 50% at times. It does look likes it getting worse as more clients connect.

I did try SRS early on but the latency and speeds were a lot worse than interop mode. Is there a maximum distance before SRS becomes ineffective? The reason I ask if because nearly all our customers are 3-5km’s away.