Member
Posts: 125
Registered: ‎09-15-2009
Kudos: 1

Using Rocket M5 with 2 x 27 dB Grids as Backhaul

This combination should offer better results as a backhaul with the same kit on each side.
(very much like dual nstreme in Mikrotik)
Rocket M5 with 2 x 27 dB Grid antennaes (vertical & horizontal)
rather than using a BulletM5 with one 27dB grid
If using a 1Meter SMA Reverse Polarity - N-Type Cable (seal well at SMA side)
Do not have any kit, just throwing an idea around
Regards
Justin Miles

South Africa Webcam Site: midafricam.co.za
SuperUser
Posts: 42,318
Registered: ‎06-23-2009
Kudos: 8641
Solutions: 1448

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

I'm not sure who you're throwing
this idea around to or for, but...

If you use a Rocket M5 with two
discrete antennas, you can do
that, but you'll need to be sure
they're properly separated to
avoid interaction.

If you do that, the thruput will
be better than a Bullet M5.

But why not use a single dual-
polarity antenna? If you're saying
somebody should offer a good
dual-polarity grid, I agree. Dave

> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Member
Posts: 125
Registered: ‎09-15-2009
Kudos: 1

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

Its an idea Dave, would you think RocketM5 would be better for backhaul as most folks mention Bullets for backhaul
Agreed Dave about the seperation or use the Rocket M5 with the RocketDish as it comes ready with the RocketM5 mounting kit, dish seems bulky but perfect for long haul
OK OK I know am stating the obvious
Regards
Justin Miles

South Africa Webcam Site: midafricam.co.za
SuperUser
Posts: 42,318
Registered: ‎06-23-2009
Kudos: 8641
Solutions: 1448

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

Huh?

Kilos, it was you who mentioned the
Rocket. I think the Bullet is fine for
backhaul. The difference is of course
that the Rocket M5 uses MIMO 2X2
while the Bullet uses 1X1 (it has only
one antenna).

So the Rocket should give you much
better thruput if used with a dual-
polarity antenna (or two discretes
that are properly spaced and isolated). Dave

> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
New Member
Posts: 15
Registered: ‎06-12-2008

Dual Pol Antenna

Friends,

Dual Pol Antenna, is the correct Antenna type to use in 802.11N?
In the N-Card, there are 3 conector Antenna ( Sr71-A), but one frequency only, So, in my studies about N tecnology, i think that is not correctly to use a different Polarization Antennas.

What about can you help me or facility my ideas??

thanks a Lot!!!
SuperUser
Posts: 42,318
Registered: ‎06-23-2009
Kudos: 8641
Solutions: 1448

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

There are several 'flavors' of MIMO:

en.wikipedia.org/wiki/MIMO#Forms_of_MIMO

For example, Bullet M is 1X1, Rocket is 2X2;
so is SR71 (with two antennas).

And you can use 'n' technology with 1, 2, 3 or
more antennas for 'spatial diversity'. MIMO is
technology embedded within 'n' protocols.

Rocket (M) uses two isolated antennas
(either one dual-polarity or two carefully
separated ones). The high-bandwidth
data traffic is transmitted as two groups,
and re-combined into one by the receiver. Dave

> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Regular Member
Posts: 730
Registered: ‎06-09-2009
Kudos: 65
Solutions: 1

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

....dish seems bulky but perfect for long haul...


When I first opened the box the dish seemed big. After I saw it next to the 29db grid it was replacing... well now it actually looks small Icon Smile
SuperUser
Posts: 42,318
Registered: ‎06-23-2009
Kudos: 8641
Solutions: 1448

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

Now compare weight and wind-loading! Dave

> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Regular Member
Posts: 730
Registered: ‎06-09-2009
Kudos: 65
Solutions: 1

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

I do understand the wind loading differences (which is why I have a RADOME on order).
Regular Member
Posts: 730
Registered: ‎06-09-2009
Kudos: 65
Solutions: 1

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

However, I do appreciate the rigidity of the RocketDish mount.

The 29db PacWireless grids flutter a lot in even the lightest wind because of the flimsy mounts (which reminds me, I need to get out to the shop and fab up something better for that grid before I hang it again).
SuperUser
Posts: 42,318
Registered: ‎06-23-2009
Kudos: 8641
Solutions: 1448

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

Yep--I wouldn't use the
Pac Wireless grids for anything.
They're coat-hanger wire with
lumpy welds on a steel frame,
and crappy paint.

This brand has a much heavier
mounting bracket (2 U-bolts)
and a cast-aluminum frame
with powder-coat paint:
www.poynting.co.za/productdisplay.php?id=178&cat_id=3
Microcom and Titan carry them. Dave

> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Regular Member
Posts: 730
Registered: ‎06-09-2009
Kudos: 65
Solutions: 1

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

I have thought about trying one of those. I haven't been able to find a picture of the actual mounting system on them yet (do you have a picture?).

The PacWireless grids are cheap - but they typically work fine. The 29db grid also has 2 mounting U-bolts, but it's the 1/8" thick bracket that is just not strong enough (a simple gusset in the corner would make a world of difference).
SuperUser
Posts: 42,318
Registered: ‎06-23-2009
Kudos: 8641
Solutions: 1448

Re: Using Rocket M5 with 2 x 27 dB Grids as Backhaul

They work fine, but for how long?
The one I took out of service lost
a lot of its paint just from handling.

Right--the 29dBi version has two
U-bolts; the lower-gain one has
just one. Zinc-plated steel sheet,
and I think non-stainless U-bolts.

This one is heavy aluminum plate
with stainless-steel U-bolts. Yes,
I do have a picture, but it's large.
PM me and I'll email it. Dave

> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com