That's a benefit of using slant, isn't it? It's not quite clear to me how that works when the antennas are mismatched like this, with H/V on one end...
On Tue, Nov 22, 2016 at 5:13 PM, Chuck McCown <[email protected]> wrote: > No, the only benefit is rejection of reflected signals. > > *From:* Nate Burke > *Sent:* Tuesday, November 22, 2016 4:09 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] EPMP 2.4 antenna options > > I read through the whitepaper, and still don't understand it. My basic > takeaway was 'We can do this cool thing, but it really doesn't gain you > anything' It specifically says there is no net SNR benefit. > > On 11/22/2016 5:05 PM, Mathew Howard wrote: > > I have tested it on multiple occasions with both ePMP and UBNT radios, and > it does seem to work like they say. Whether it works better or worse or the > same as keeping everything the same, I don't know, but the signal does > pretty much stay the same if your rotate the antenna 45 degrees. > > On Tue, Nov 22, 2016 at 5:02 PM, George Skorup <[email protected]> wrote: > >> There aren't two independent transmitters in a dual stream MIMO radio, >> just one. So the RF output power is divided and thus out of phase. That's >> how my pea brain understands it anyway. >> >> >> On 11/22/2016 4:49 PM, Adam Moffett wrote: >> >> ...I'm not saying I understand it by the way. Just saying I have no >> reason to disbelieve it. If in doubt, turn your SM 45 degrees and see if >> your signal changes. >> >> >> >> ------ Original Message ------ >> From: "Jaime Solorza" <[email protected]> >> To: "Animal Farm" <[email protected]> >> Sent: 11/22/2016 5:45:38 PM >> Subject: Re: [AFMUG] EPMP 2.4 antenna options >> >> >> So how does the connector distinguish between these antennas and relay >> information to chip set to "phase differently"? I am assuming these >> antennas are passive with no smarts. >> >> On Nov 22, 2016 3:42 PM, "George Skorup" <[email protected]> wrote: >> >> Phase. Yes, it's built into the chipset. 450 does it too. At least the >> 3.65. >> >> >> On 11/22/2016 4:34 PM, [email protected] wrote: >> >>> I think so... >>> >>> -----Original Message----- From: Nate Burke Sent: Tuesday, November 22, >>> 2016 3:29 PM To: [email protected] Subject: Re: [AFMUG] EPMP 2.4 antenna >>> options >>> So if you were to use like a v/h UBNT antenna instead of the Dual Slant >>> antenna, They both should work? Wondering what the 3x price difference >>> between antennas gains you. >>> >>> On 11/22/2016 4:26 PM, [email protected] wrote: >>> >>>> Supposedly it makes up for the loss by using the desired signal >>>> component from both antennas. >>>> I remember reading the original white paper, and I remember thinking I >>>> understood it for about 5 minutes or so. >>>> >>>> -----Original Message----- From: Nate Burke >>>> Sent: Tuesday, November 22, 2016 3:24 PM >>>> To: [email protected] >>>> Subject: Re: [AFMUG] EPMP 2.4 antenna options >>>> >>>> So you have a Dual slant AP and a V/H SM? Isn't that just losing signal >>>> for no reason? >>>> >>>> On 11/22/2016 4:21 PM, Adam Moffett wrote: >>>> >>>>> They've apparently got some electronic magic that can take the >>>>> received signal on V/H and calculate what the transmitted dual slant >>>>> signal >>>>> was. It's been explained here, but I don't remember the details. They >>>>> assert that you can mix and match safely. In fact they started out >>>>> selling >>>>> slant pol sector antennas and V+H SM's, so they are/were confident enough >>>>> in this to make it the "default" setup. >>>>> >>>>> It's a feature of their 802.11n chipset, so the computation is done in >>>>> hardware. >>>>> >>>>> >>>>> ------ Original Message ------ >>>>> From: "Nate Burke" <[email protected]> >>>>> To: "Animal Farm" <[email protected]> >>>>> Sent: 11/22/2016 5:14:04 PM >>>>> Subject: [AFMUG] EPMP 2.4 antenna options >>>>> >>>>> I'm looking at the Cambium 2.4 antenna C024900D004A, and it lists it >>>>>> as being DualSlant +/-45 degrees. Does this mean that the Force 200 2.4 >>>>>> radios are also Dual Slant to talk to this antenna? I didn't find >>>>>> anything >>>>>> on the Force200 spec sheet talking about slant. If you use a V/H Antenna >>>>>> as the AP, can you not use the Force 200 as the SM? >>>>>> >>>>>> >>>>>> >>> >> >> >> >> > > >
