XR5 and other series Frequency Chart

[wispwest]

I can't find the frequency (or channel) charts, even on the product pdf! The reason being is I need the 5.4Ghz band. Alot of them say just 5Ghz, or 5.2-5.8Ghz, not indicating clearly what actual frequencies. Does anyone know of a site where I can get ALL the specs for these cards? Or does anyone know which Ubiquiti cards handle the 5.4Ghz?

[WHT]

Like this?

http://telecomanddata.com/channels.png

[wispwest]

yes thank you! I just needed to be SURE that the XR5 supports the 5.4Ghz. I assume you pulled that from a XR5

[wispwest]

thats weird, usually the 5.4-5.8 band starts at 5495 and works its way up. Can anyone confirm XR5 supports the 5.4-5.8Ghz band?

[J_Hughes]

MUAHAHAHAHAHAH!!

I found it. The documentation I had been looking for, because of you - wispwest :) and because I want to use 5.4-5.7ghz frequencies now that I know they are unlicensed.

here it is:

drumroll....
*tap**tap**tap*...*tap**tap*
http://forum.mikrotik.com/viewtopic.php?f=7&t=17573&p=147893

So, it is summarized in the last posts there:


uldis
Post subject: Re: 5.4GHz superchannel license needed?
PostPosted: Mon Mar 16, 2009 10:30 am
MikroTik Staff

we have added new radar patterns for the DFS code, but we haven't made any DFS certifications that why we haven't enabled the 5.4ghz support for the US country.
All the latest RouterOS versions have those new radar patterns in the DFS code.

CarulloS
Post subject: Re: 5.4GHz superchannel license needed?
PostPosted: Mon Mar 16, 2009 3:09 pm

So just for my testing info -- and to clarify...

RouterOS 3.20 or later has full DFS2 functionality and should work in a similar manner to any DFS2 certified system?

Its just not gone through the formal certification process yet right, but it should work fine?

And... turning on DFS support enables the already built-in DFS2 code that should work right?

What about the TPC which is also required? I think this would be an excellent option to turn on for any link. In addition we should be able to set a target strength value and anything stronger than that have routeros throttle back power to prevent transmission issues.

Thanks,
Scott



AND THIS link...

http://forum.mikrotik.com/viewtopic.php?f=3&t=20007

Sumerized...

Please fax us a letter where you say that you will use the additional frequencies according to your local laws, example here:
http://www.mikrotik.com/pdf/extend.pdf
Make the letter on a company letterhead and it should be signed and stamped by an authorised company representative
We will then enable this feature on your account. fax number: +371 7317701

Each custom frequency license costs 10$.

Regards,
Sergejs


This last part was from November of 2007... but even with modifying the country codes in the RouterOS I was not able to access 5.4ghz, only 5.5-5.8ghz... but that's still another 200mhz I couldn't use before.

Still researching this one

[J_Hughes]

OK... i jst realized I've been having a blond moment - the "5.4ghz" spectrum that was actually opened up is 5.470 GHz to 5.725 GHz - and all I can see is 5.5ghz-5.8ghz.... the reason for this is because it's designed for a 20mhz wifi channel, and has to ensure no spectrum violations (per FCC requirements)

This puts usage up to 4780.. which is more then enough in my book, 10mhz lost - and there's probably a good reason for it

something to do with this post: http://forum.mikrotik.com/viewtopic.php?f=7&t=24228&hilit=5.4ghz

I've figured it out 99% and don't care to figure out the last 1%

*EDIT*on a brainstorm I switched to 5ghz-5mhz Bandwidth, sure nuff - 5495 is available - they're just making sure there is no out of spectrum signal *EDIT*

Thanks,
- Josh

[wispwest]

ya I saw that same mikrotik post, but when I saw the date I quit reading. A lot has changed since 2004!

[J_Hughes]

Upon finding some more articles, it seems that for compliance with FCC regulations, "DFS" and "TPC" must be supported by any system utilizing 5470-5750mhz.
DFS is a feature that dynamically instructs a transmitter to switch to another channel whenever certain
conditions (for example, a threshold value of the prevailing ambient interference level on a channel) are
met. Prior to initiating and during a transmission, a U-NII device’s DFS feature would monitor the
available spectrum in which the device could operate for the presence of a radar signal.
TPC is a feature that regulates a device’s transmit
power in response to the level of an input signal or a command issued by a controller (e.g., a command signal might be emitted by a controller when the received signal falls below a predetermined threshold).
http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-06-12A1.pdf
_____________________________________________
Mikrotik has both features in their OS:

TPC:
if you enter your antenna gain, it will lower the power accordingly (we support TPC, not ATPC but it is almost the same thing, and it does comply with regulations)
http://forum.mikrotik.com/viewtopic.php?f=7&t=10096&hilit=tpc
DFS:

uldis
Post subject: Re: Enabling use of 2004 U-NII expansion frequencies in the U.S.
Posted: Thu Aug 21, 2008 9:20 am

It is required to have DFS2 support for those frequency ranges. We haven't finished making it. When we will finish making it then we will add those frequencies.

uldis
Post subject: Re: 5.4GHz superchannel license needed?
Posted: Mon Mar 16, 2009 10:30 am

we have added new radar patterns for the DFS code, but we haven't made any DFS certifications that why we haven't enabled the 5.4ghz support for the US country. All the latest RouterOS versions have those new radar patterns in the DFS code.
http://forum.mikrotik.com/viewtopic.php?f=7&t=26097&hilit=dfs2
http://forum.mikrotik.com/viewtopic.php?f=7&t=17573&p=147893&hilit=dfs2#p147893

So, moments ago - through the above info, I have been able to confirm that I can ALMOST legally use 5.4-5.75ghz with RouterOS. The only thing we seem to be waiting on is a "DFS certification" by Mikrotik.

Happy Hunting! :)
- Josh