Make sure all cables going up the tower, including Cat5 and their feed line for the 2-way radio, has the shield grounded properly at top, middle and bottom of the tower. I agree with Matt Brendle, try powering down the NBM2 and do a quick test to see if anything changes. Mobile radios usually output more power than a handheld (mobile is 10w or higher where handheld is about 5w) so the mobiles are probably pushing enough power to break through the RFI generated by the NBM2, if any.
Adam Kennedy | Network Engineer Omnicity, Incorporated PO Box 8 | Rushville, Indiana | 46173 866-586-1518 [email protected]<mailto:[email protected]> www.broadbandnetworks.com<http://www.broadbandnetworks.com> From: Matt Brendle <[email protected]<mailto:[email protected]>> Reply-To: WISPA General List <[email protected]<mailto:[email protected]>> Date: Thursday, October 31, 2013 at 12:37 PM To: 'WISPA General List' <[email protected]<mailto:[email protected]>> Subject: Re: [WISPA] 2.4ghz AP interfering with 2-way radio I would try powering off the NBM2 and let them do a quick test. First thought would be they have something wrong with their handheld, like bad mic, poor reception with rubber duck, etc. From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of Sean Heskett Sent: Thursday, October 31, 2013 12:35 PM To: WISPA General List Subject: Re: [WISPA] 2.4ghz AP interfering with 2-way radio It might also be the Ethernet run causing interference. On Thursday, October 31, 2013, Chris Fabien wrote: We have a tower site where we agreed to allow a friend of the tower owner to install a 2-way radio repeater. I believe it is using a frequency around 450 mhz. We installed their omni antenna on a 3ft stand off close to a UBNT Nanobridge M2 radio which is pointing directly away from the omni - omni is about 4ft behind the dish. They are complaining about loud noise/interference when using the repeater from a handheld. From a mobile(vehicle) radio it works fine. What's the solution to fix this? Move the antennas further apart? Their radio supplier is suggesting that their omni should be installed at top of tower above all our equipment. We were reserving the use of the top mast mount for future needs, and don't want to do this.
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