The first thing I'd clarify is who has interference protection priority, in their colocation agreement? You or them?
This will define who has to assume the burden of cost or unconvenience to resolve and prevent interference. Are your AP Antennas integrated or embedded? If embedded, the other party does not under stand the FCC certified system rules, that prevent you from inserting filters, which you couldn't do either without changing your APs to ext models. I would argue that front in overload is a likely possibilty. I'd argue that you should push to have the other parties new equipment to be installed at a location a safe distance vertically away from your antennas, to prevent the overload, and to pre-calculate what that safe distance needs to be. (also de-sensitization could occur) Or, if this is going to be a trial and error thing, that its made clear the proceedure and timeline for resolution (which should be immediate) if interference is heard. I'd suggest being available on day going live, so you can have them shut down, if link quality get hurt for your customers. If you already have ext model ap in the air, it may be easier to just buy and install the filters as a precaution, if the insertion loss is acceptable to incur. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: Eduardo To: WISPA General List Sent: Thursday, May 05, 2011 2:56 PM Subject: [WISPA] Possible interference with Alvarion 2.4 / 5.8 GHz Hi, I have 2.4 GHz and 5.8 GHz AP´s in a tower where a company is planning to install above our antennas a channel 24 LPTV antenna receiving on 647 MHZ (channel 43) and transmitting on 533 MHz (channel 24). My question is if the harmonics could cause any interference to us or could be an issue? These are the specifications we received from the company: The transmit power will be 580 watts on TV channel 24 which is 530-536 MHzThe transmitter is heavily filtered with a "stringent mask" to eliminate out of band energy. http://louise.hallikainen.org/FCC/FccRules/2010/74/794/If there are any problems it's likely due to front end overload of your equipment. That can be easily resolved with the addition of filters between your antenna(s) and receiver(s).If your 2.4 GHz equipment suffers any interference I'd propose an L-com BPF2400A: http://www.l-com.com/item.aspx?id=22046If your 5.8 GHz equipment is bothered the BPF5800A should eliminate any issues: http://www.l-com.com/item.aspx?id=22184Any comment will be welcome. Thanks. EduardoWebjogger Internet Serviceswww.webjogger.net ------------------------------------------------------------------------------ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
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