Are you loosing connectivity to the client radios or only loosing data from them?
What do your link stats show? Signal quality etc. What are your eirp levels at normally and during the events? ----- Original Message ----- From: Tom Sharples To: Wireless@wispa.org Sent: Wednesday, October 31, 2012 1:46 PM Subject: [WISPA] CM9 Rx blocking problem? Hello all, We're seeing an odd problem at a customer location in Honolulu. About a year ago, we set up a pretty conventional point-to-multipoint 5.8 Ghz setup for video surveillance - a dual-radio gateway node attached to a pair of sector antennas, and 4 client radios (2 on each sector) attached to IP cams. The client radios are between 1/4 to 1/2 mile away from the gateway node. This is a multi-building industrial project in a fairly heavily polluted (RF wise) area. There's a Home Depot and Lowes nearby with equipment on all 5.8 Ghz channels. However our radios scan well above the noise floor. Our equipment uses pcengines alix boards running our own linux-based OS and CM9's using standard madwifi-style drivers. Same thing we've been using for years. This installation worked well at first. However, we are now seeing a situation in which both gateway radios suddenly stop receiving data from the downstream clients. This lasts from 5 to 20 minutes or so and then magically fixes itself. When I ssh in during the problem, there'e no indication of low-level driver problems or crashes, everything looks normal except for the sudden lack of data and connectivity with the client devices. This installation is near Pearl Harbor and there are constant overflights from military aircraft. I'm wondering if this is a sensitivity issue to e.g. radar or some other high-powered signals from these planes. I've seen things like this before but never lasting up to 20 minutes. Would we see an improvement by switching to XR5's? We don't normally use those on short hauls like but they have better OOB filters than the CM9's. Thoughts? Thanks, Tom S. ------------------------------------------------------------------------------ _______________________________________________ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
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