Yes, all true.
But I thought Jerry was talking about a V/H Rocket interfering into a +/-
Rocket, where both are dual pol.
From: George Skorup (Cyber Broadcasting)
Sent: Saturday, March 07, 2015 8:17 PM
To: af@afmug.com
Subject: Re: [AFMUG] Typical improvement when using 45* slant
I thought the whole idea of slant was chain equalization and certain types of
multipath are handled better. Take the PMP450 for example. On 5GHz (H/V), if we
get a strong interferer on v-pol (all the FSK out there) and V SNR is 15 while
H SNR is 30, you get MIMO-A. With the slant, now your V pol interferer affects
both - and + 45 equally, so you might get a SNR of 18 on both polarities, but
you're still getting MIMO-B. Dual 16QAM is better than single.
On 3/7/2015 7:14 PM, Ken Hohhof wrote:
I’m not sure that’s true unless the AF does some sort of noise cancelling
algorithm, which maybe it does. But I don’t see where the antennas alone
accomplish that. Yes, +45 would see V at –3dB, but it would also see H at
–3dB, and assuming they are uncorrelated, the addition puts you right back
where you started.
From: Josh Luthman
Sent: Saturday, March 07, 2015 6:55 PM
To: af@afmug.com
Subject: Re: [AFMUG] Typical improvement when using 45* slant
Ahh I see what you're saying.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mar 7, 2015 7:53 PM, "Jerry Richardson" <je...@richardson.bz> wrote:
The slants will be for the AF5X which will see the rockets -3dB less than
if the AF5X was on H/V
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Josh Luthman
Sent: Saturday, March 07, 2015 4:41 PM
To: af@afmug.com
Subject: Re: [AFMUG] Typical improvement when using 45* slant
Rockets don't decide the slant/linear. The antenna does. So those "HV
Rockets" on the 45* antenna aren't HV at all.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Sat, Mar 7, 2015 at 7:25 PM, Jerry Richardson <je...@richardson.bz>
wrote:
I see I’m not ‘splaining myself adequately
On a given tower, if I have some rockets (H/V) and I use a 45 degree
antenna, I should see additional S/N of x (3dB was my guess) between the two
systems.
While that +3db would be welcome, I’m not counting it.
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Josh Luthman
Sent: Saturday, March 07, 2015 3:50 PM
To: af@afmug.com
Subject: Re: [AFMUG] Typical improvement when using 45* slant
Radios are different, but slant vs pol won't get you different signals.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mar 7, 2015 6:38 PM, "Jerry Richardson" <je...@richardson.bz> wrote:
Looking to put in an AF5X with the 45deg slant antennas. Was curious if
we would see any additional link improvements over the H/V Rockets.
I’m just assuming we won’t to error on the side of caution.
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Jon Langeler
Sent: Saturday, March 07, 2015 3:20 PM
To: af@afmug.com
Subject: Re: [AFMUG] Typical improvement when using 45* slant
if you have any links with oddball H/V signals, dual slant would level
them out a bit to be about the same on each polarity.
Sent from my iPhone
On Mar 7, 2015, at 12:34 PM, Jerry Richardson <je...@richardson.bz>
wrote:
Looking at using AF5X for a link with the 34dB 45* slants
What kind of improvement would you expect to see over standard V/H
polarization? +3dB? +6dB?
Thanks!
