I understand how XPD and vector ray summation works.. How cross polarity and isolation work, how slant 45 + - works... I used 45 slants back in 90s... They didn't have dual slants until much later as mobile cellular grew and antenna size/tower space became issue... Diversity was used with two receive antennas to improve performance and reduce dropped calls... These required x wavelengths of separation. So now newer sites have dual slant antennas and many old site's are getting antenna replacements... The antennas are smaller but better performance. I don't get how chip set detects difference... I can take a MIMO epmp or rocket and connect two dishes in vertical polarity and space them apart and link would work. I think the V and H labels are just to insure we connect antennas correctly... Or am I wrong and need to go home to my Tecate?
On Nov 22, 2016 3:49 PM, "Adam Moffett" <dmmoff...@gmail.com> 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" <losguyswirel...@gmail.com> > To: "Animal Farm" <af@afmug.com> > 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" <geo...@cbcast.com> 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, ch...@wbmfg.com wrote: > >> I think so... >> >> -----Original Message----- From: Nate Burke Sent: Tuesday, November 22, >> 2016 3:29 PM To: af@afmug.com 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, ch...@wbmfg.com 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: af@afmug.com >>> 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" <n...@blastcomm.com> >>>> To: "Animal Farm" <af@afmug.com> >>>> 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? >>>>> >>>>> >>>>> >> > >
