Good point. ------ Original Message ------ From: "Scott Lambert" <[email protected]> To: [email protected] Sent: 1/6/2017 4:36:54 PM Subject: Re: [Telrad] Split Mode 2f
>What is the difference in azimuth between the two antennas? It >probably >needs to be somewhat more than the radiation width of the sectors. You >may already be 90 degrees away using 65 degree sectors. > >Even with commercial grade radios, there will be some radiation outside >the desired channel width. If the sectors can hear clients from the >other frequency, then there will probably be some noise heard in the >uplink direction for at least the 1 Mhz closest to the other frequency. >Not a lot but some. Being 12 db down from the center gain of the >sector >antenna would likely help in an adjacent channel situation. > >On Fri, Jan 06, 2017 at 09:15:53PM +0000, Adam Moffett wrote: >> That's what I had assumed when I made them adjacent :) >> >> >> ------ Original Message ------ >> From: "Shayne Lebrun" <[email protected]> >> To: "'Adam Moffett'" <[email protected]>; [email protected] >> Sent: 1/6/2017 2:42:40 PM >> Subject: RE: [Telrad] Split Mode 2f >> >> >My understanding is that it???s still one physical radio, just >> >broadcasting on two different frequencies. So, both pairs of >>antennas >> >are transmitting at the same time, and both pairs of antennas are >> >receiving at the same time. Which, to my mind, means you???d want >>to >> >treat them like any other collocated synced radios; no overlap, but >> >little or no guard band required. >> > >> > >> > >> >From:[email protected] [mailto:[email protected]] On >> >Behalf Of Adam Moffett >> >Sent: Friday, January 6, 2017 2:26 PM >> >To:[email protected] >> >Subject: [Telrad] Split Mode 2f >> > >> > >> > >> >I've been meaning to bring this up for awhile: >> > >> > >> > >> >They created split mode 2f for situations where you want two sector >> >antennas on one Compact, but the two are not placed back to back. >>How >> >far apart do the two frequencies need to be? >> > >> > >> > >> >I had the two channels adjacent, but we had UE's dropping off. Then >>I >> >spread them out so there's a large guard band between them and we >> >stopped having the issue. Does anyone know how close they can >>safely >> >be? >> > > >> _______________________________________________ >> Telrad mailing list >> [email protected] >> http://lists.wispa.org/mailman/listinfo/telrad > > >-- >Scott Lambert KC5MLE Unix >SysAdmin >[email protected] >_______________________________________________ >Telrad mailing list >[email protected] >http://lists.wispa.org/mailman/listinfo/telrad > _______________________________________________ Telrad mailing list [email protected] http://lists.wispa.org/mailman/listinfo/telrad
