Hi Chuck, I'm going to run the spectrum analyzer on a different client to rule out NIC issues. Now you mention it we do have a couple of old Proxims, that should have been powered off a long, long time ago as they are no longer used. So I'll look into that as well.
Interestingly, I've also seen the signature on channel 11, when in the same geographical location minutes after seeing it on channel 1 and shortly before it disappeared. Thanks Sean From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Chuck Enfield Sent: March-08-17 1:05 PM To: [email protected] Subject: Re: [WIRELESS-LAN] 2.4 GHz Interference Hi Sean, Are all of your APs and Wi-Fi NICs in the area working properly? That plateau at -20dBm (see image) is almost certainly from an nearby OFDM source on channel 1. If that broadband interference is from the same source, I'd look for a malfunctioning Wi-Fi radio. It's been a while, but we had Proxim APs with a rare failure mode that looked like this. You could see the OFDM, but there was intermittent, high-intensity, broadband noise coming from the radio. Please don't ask me to explain the intermittent part. I never did figure that out. Good Luck, Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Gray, Sean Sent: Wednesday, March 08, 2017 2:32 PM To: [email protected]<mailto:[email protected]> Subject: [WIRELESS-LAN] 2.4 GHz Interference Hi Everyone, I've been doing a little spectrum analysis around campus and I keep seeing the same interference signature in different buildings. I was wondering if anyone had seen anything like this before. It is typically visible for well over 10 minutes at a time and then it completely disappears. Thanks Sean Sean Gray | B.Sc (Hons) Voice, Collaboration & Wireless Network Analyst ITS, University of Lethbridge ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
