I like using both polarities to maximize Rx sensitivity. Coordination is the same cost. Duplexers are also not that much more.
Jon Langeler Michwave Technologies, Inc. > On Aug 15, 2017, at 5:59 PM, Mathew Howard <mhoward...@gmail.com> wrote: > > Max channel bandwidth is 56mhz, but you should easily be able to get 250Mbps > out of a 40mhz channel... I'm not sure there's much point in going in > narrower than that. Actually, doing SISO at a 56mhz channel might make more > sense, that should get around 275mbps at 256qam (and a bit more if the link > will do 1024qam, obviously), but then you'd only need a one polarity, so it > may save a bit on coordination, and you wouldn't need to buy the extra > duplexers. > >> On Tue, Aug 15, 2017 at 1:34 PM, Chuck McCown <ch...@wbmfg.com> wrote: >> What is a common channel BW? 40 MHz? I suppose it depends on congestion. >> I only need about 250 Mbps so lower order modulation may be desirable and >> perhaps narrower channels too. >> >> From: Jeremy >> Sent: Tuesday, August 15, 2017 10:54 AM >> To: af@afmug.com >> Subject: Re: [AFMUG] AF-11x >> >> Of course, the exact configuration is based on your license and which >> frequencies it is supposed to operate on. The above configuration is just >> an example. >> >>> On Tue, Aug 15, 2017 at 10:53 AM, Jeremy <jeremysmi...@gmail.com> wrote: >>> They are like that, but 3x bigger. On top, the lid comes off and the >>> duplexers go beneath the cover. If your link is 'High' then you will want >>> 'High' duplexers for both sides of the link (x4 total - two extra to >>> purchase) - they will go in a configuration like 1-3-3-1 on one side and >>> 3-1-1-3 on the other side. >>> >>>> On Tue, Aug 15, 2017 at 10:11 AM, Mathew Howard <mhoward...@gmail.com> >>>> wrote: >>> >>>> They come with 1 duplexer (setup for SISO) - you need to buy the second >>>> one separately to do MIMO. You do need to figure out what frequencies >>>> you're going to be using before you buy the radios, since there are two >>>> different duplexers, depending on which half of the band you're in. >>>> You need one frequency pair on both polarities (for MIMO). >>>> >>>>> On Tue, Aug 15, 2017 at 10:52 AM, Chuck McCown <ch...@wbmfg.com> wrote: >>>>> Do they all come with two N connectors or do you have to pay more for >>>>> duplexers? Not quite sure how to buy or license. I guess you have to >>>>> have two pairs of frequencies? Or at the very least, both polarizations >>>>> on the same frequency? >>>>> >>>>> Trying to collect some budgetary estimates on what my project is going to >>>>> cost. >
