If they figure out how to put a waveguide interface on their
interchangeable/reversible diplexer design, they may have something. But
until then, it ain't waveguide, so I ain't buyin it. That simple.
On 7/1/2016 10:13 PM, Chuck McCown wrote:
The connectors may very well be designed such they will work at that
frequency, but the care that is taken when terminating cables with
them and the quality of the cable is every bit as important. UBNT
ain’t exactly known for high end stuff. (Sorry Chuck M). I am sure
that if it is critical to the success of the product, they will make
it work. But really, why waste time speculating. Time will tell.
*From:* Josh Reynolds <mailto:[email protected]>
*Sent:* Friday, July 01, 2016 8:23 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] Convert Andrew Dragonwave dishes to N
Let me clarify something, I'm not taking about comparing N to SMA, I'm
talking about verifying these high quality N connectors are suitable
for use in low to medium cost licensed backhaul links.
On Jul 1, 2016 9:12 PM, wrote:
I'm saying the same thing. Take the connector designed for it,
thrown your opinion in the trash, and post the results. Repeat the
test. Have someone else repeat the test. Scientific method.
On Jul 1, 2016 9:10 PM, "Chuck McCown" <[email protected]
<mailto:[email protected]>> wrote:
Type N connectors are not in common use above 6 GHz. Believe
me or not.
You wanna go above 6, there are plenty of other cheaper and
better connectors to use. N connector concentricity is not
inherent to the design of the connector. And concentricity is
essential to good return loss.
You send me an N connector cable. I will put it on a load and
connect it to a vector network analyzer with a smith chart on
the screen. Will record video. Then I will wiggle the cable
and back off the connector a bit you can see for yourself the
dot (arc actually) wander all over the place. The higher the
frequency the more it becomes a wild line.
Then I will do the same for SMA and you can see for yourself
which one is more stable. Opinions don’t matter. A dot is a
dot, an arc is an arc and a squiggly line is a squiggly line.
*From:* Josh Reynolds <mailto:[email protected]>
*Sent:* Friday, July 01, 2016 7:53 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] Convert Andrew Dragonwave dishes to N
So, nothing personal by this... but if the connector is
designed for it (and has several versions by other
manufacturers to boot), has been used (and is still used) on
testing equipment... I'm probably more inclined to take their
word for it over yours.
On Jul 1, 2016 7:58 PM, "Chuck McCown" <[email protected]
<mailto:[email protected]>> wrote:
IMHO, 6 GHz is the upper limit.
*From:* Peter Kranz <mailto:[email protected]>
*Sent:* Friday, July 01, 2016 5:22 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] Convert Andrew Dragonwave dishes to N
“Originally, the connector was designed to carry signals
at frequencies up to 1 GHz
<https://en.wikipedia.org/wiki/GHz> in military
applications, but today's common Type N easily handles
frequencies up to 11 GHz. More recent precision
enhancements to the design by Julius Botka at Hewlett
Packard <https://en.wikipedia.org/wiki/Hewlett_Packard>
have pushed this to 18 GHz.”
http://inmet.apitech.com/inmet/micro-inmet-between-typen.cfm
*Peter Kranz
*www.UnwiredLtd.com <http://www.unwiredltd.com/>
Desk: 510-868-1614 <tel:510-868-1614> x100
Mobile: 510-207-0000 <tel:510-207-0000>
[email protected] <mailto:[email protected]>
*From:*Af [mailto:[email protected]
<mailto:[email protected]>] *On Behalf Of *Chuck McCown
*Sent:* Thursday, June 30, 2016 3:24 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] Convert Andrew Dragonwave dishes to N
Yeah, I think this is a case of somebody bowing their neck
- a pissing contest between a boss and underlings at UBNT.
*From:*Eric Kuhnke <mailto:[email protected]>
*Sent:*Thursday, June 30, 2016 4:19 PM
*To:*[email protected] <mailto:[email protected]>
*Subject:*Re: [AFMUG] Convert Andrew Dragonwave dishes to N
I have never in my life personally seen an N connector
rated above 11 GHz. High-quality/expensive N connectors
are used extensively in two way satellite - such as with
3.0 meter C-band Tx/Rx earth station dishes... But you
only use N for the 50 ohm coax cables from the modem
(indoors) to the electronics which lives directly attached
to the waveguide/feed on the dish (Rx LNB and Tx SSPA/BUC).
The coax is used between 1.2 to 1.8 GHz to communicate
with the Tx and Rx electronics on the dish. A satellite
LNB on the Rx side is basically a 10:1 ratio downconverter.
Like so:
http://beta.satcomresources.com/sca/images/NORS3120N_detail-3.jpg
There's your single polarity waveguide interface on one
side, N on the other.
On Thu, Jun 30, 2016 at 6:49 AM, Chuck McCown
<[email protected] <mailto:[email protected]>> wrote:
First of all, I have never seen an N connector rated
above 11 GHz, and those are extra expensive.
If there is an 18 GHz version, it will be even more
expensive.
This will not be a cable you can make yourself in the
field and it will be very sensitive to being fully
seated so you will probably have to use a torque
wrench to make it work at 18 GHz.
Silly. You can weatherproof an SMA just as easy as an
N connector. Good heatshrink can be found for both.
Folks trying to use N connectors at 18 GHz are going
to quickly get introduced to the world of return loss
problems.
*Von:*Af [mailto:[email protected]
<mailto:[email protected]>] *Im Auftrag von *Rob
Genovesi
*Gesendet:* Donnerstag, 30. Juni 2016 01:32
*An:* [email protected] <mailto:[email protected]>
*Betreff:* Re: [AFMUG] Convert Andrew Dragonwave
dishes to N
From Gary-UBNT:
"We are working on data sheets right now so hopefully
you will get more questions answered shortly. The
reason for N connectors relates to demand for higher
mechanical robustness and the ability for the
connectors to be weather-proof as a stand alone
connector (fully weatherproof gaskets and the ability
to accept larger diameter jumpers readily). The N
connectors we use are rated to 18+ GHz."
An active thread on the UBNT forums right now, more
available here:
http://community.ubnt.com/t5/airFiber/Some-AF11X-details/td-p/1512145
-Rob
On Wed, Jun 29, 2016 at 12:05 PM, Bill Prince
<[email protected] <mailto:[email protected]>> wrote:
I'm looking at all the other AF-nnX radios from
UBNT, and they all use SMA connectors. What reason
would they have to use N instead of SMA? Seems the
SMA connector would have fewer issues at 11 GHz.
