No, the only benefit is rejection of reflected signals.
From: Nate Burke
Sent: Tuesday, November 22, 2016 4:09 PM
To: af@afmug.com
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 <geo...@cbcast.com> 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" <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?
