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]
<mailto:[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]
<mailto:[email protected]>>
To: "Animal Farm" <[email protected] <mailto:[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]
<mailto:[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]
<mailto:[email protected]> wrote:
I think so...
-----Original Message----- From: Nate Burke Sent:
Tuesday, November 22, 2016 3:29 PM To: [email protected]
<mailto:[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]
<mailto:[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] <mailto:[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]
<mailto:[email protected]>>
To: "Animal Farm" <[email protected]
<mailto:[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?
