I am coming from FSK mostly and a little 450 so forgive my ignorance. With FSK we still needed 3 wavelengths ( 3 feet ) of separation horizontally in 900mhz to keep from self-interfering even with GPS. 3 wavelengths in 2.4 is a little more than 14 inches. Are you installing antennas close to each other than that and finding the GPS deals with it fine? Ideally I would install two antennas to a pipe using some brackets to stand the antennas off the tower leg. Those antennas are going to be awful close to each other.
Best regards, Brandon Yuchasz GogebicRange.net www.gogebicrange.net <http://www.gogebicrange.net/> From: Af [mailto:[email protected]] On Behalf Of Mathew Howard Sent: Tuesday, March 29, 2016 9:59 AM To: af Subject: Re: [AFMUG] mounting brackets / hardware for 4 epmp sectors on a rohn 45/ Even if you only do two sectors, you still want to do GPS, as that will take care of the self interference problem. If you can cover all the customers with two 90 degrees, you could just put those up initially and you can always add the other two later on, if you have the need... or you could do two 120's and add a third later on (doing ABC) - but you still need to go with GPS radios. On Tue, Mar 29, 2016 at 9:52 AM, Brandon Yuchasz <[email protected]> wrote: I assume you ran this way with some separation on channels? For example used 1 and 11? I am looking at this as a way to off load line of site and near line of site 900mhz fsk. We are deploying the 450i 900 as well but anyone I can move to 2.4 will save me throughput on the 450i not to mention be cheaper to convert. Best regards, Brandon Yuchasz GogebicRange.net www.gogebicrange.net <http://www.gogebicrange.net/> From: Af [mailto:[email protected]] On Behalf Of Josh Luthman Sent: Tuesday, March 29, 2016 9:48 AM To: [email protected] Subject: Re: [AFMUG] mounting brackets / hardware for 4 epmp sectors on a rohn 45/ 4 90 degree antennas running ABAB with GPS Not even a question to be honest. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Tue, Mar 29, 2016 at 10:44 AM, Brandon Yuchasz <[email protected]> wrote: Just looking for everyone’s experience mounting on Rohn 45 towers. We are looking to mount KP sectors on a tower site and want to make sure we have enough separation between the antennas. I am considering a few options at this site. 4 90 degree antennas running ABAB with GPS 2 90 degree antennas running AB with no GPS 2 120 degree antennas running AB with no GPS Right now 180 degrees of coverage just about all customers so 4 antennas is not required if we go that route it would be more for future needs than anything else. Just wondering what configurations you all have used in the past for situations like this and what mounting hardware / stand offs? Anyone just mount two antennas right on the tower legs? If so did you have any self-interference that close together? We have not deployed the epmp line except single sectors at this point. Best regards, Brandon Yuchasz GogebicRange.net www.gogebicrange.net <http://www.gogebicrange.net/>
