Community discussions

MikroTik App
 
gpettey
just joined
Topic Author
Posts: 2
Joined: Fri May 06, 2011 2:16 am

R52Hn txpower setting

Fri May 06, 2011 5:35 am

I have two PC-Engines ALIX 3D3 boxes, with Microtik R52Hn cards. The cards are supposed to be 25dBm, but they only show as 20dBm in iwconfig. The only somewhat relevant thread I've found (http://forum.mikrotik.com/viewtopic.php ... nh+txpower) - which is for a different card - suggests that the other card actually runs at higher power than is displayed. Is this true for the R52Hn? If not, how do I modify txpower to 25dBm?
 
MICPROF
Member Candidate
Member Candidate
Posts: 106
Joined: Thu Jan 27, 2011 7:22 pm
Contact:

Re: R52Hn txpower setting

Fri May 06, 2011 7:24 pm

Dear ,

go to wireless list then go to TX power and select ( Card rates ) and set the power 25dB then hit on apply and ok , done power is 25db .
 
User avatar
tgrand
Long time Member
Long time Member
Posts: 667
Joined: Mon Aug 21, 2006 2:57 am
Location: Winnipeg, Manitoba, Canada

Re: R52Hn txpower setting

Sat May 07, 2011 9:04 am

uhhhh.... :?

Don't do that!!!
Easy way to overheat/overdrive the amp and/or create noise.

You need to keep in mind that the output power is the total power out both connectors at a standard 20MHz wide signal.

25db - ~3db for Dual connector - ~3db for 40MHz wide channel = ~ 19db

It likely not precise but close.
 
lazerusrm
Member Candidate
Member Candidate
Posts: 162
Joined: Sat Jan 29, 2011 7:56 am

Re: R52Hn txpower setting

Sat May 07, 2011 11:45 am

25 dBm Total power output I.E. Using both Chain1 and Chain2

This means

Single chain is more like 22 dB

Dual chain should be 25 dB

The Card rating is also listed as the maximum output, or in other words, you will not get 25 dBm @ Higher modulation rates like MCS-7 or MCS-15 for example. Power output will go down as modulation rates increase with many cards.

If you set the card power to "default" it is usually the most powerful setting you can safely use.

You can then view the table under "Current TX Power" In the wireless tab.

*Note - To see the "Current TX Power" Tab, you must be select "Advanced mode" in the interface main window.

To see more in depth specifications on TX power levels VS modulation rates and sensitivty, you can look at the R52Hn brochure.

http://routerboard.com/index.php?showProduct=94

http://routerboard.com/pricelist/downlo ... ile_id=202

-Brad
 
gpettey
just joined
Topic Author
Posts: 2
Joined: Fri May 06, 2011 2:16 am

Re: R52Hn txpower setting

Mon May 09, 2011 6:00 pm

go to wireless list then go to TX power and select ( Card rates ) and set the power 25dB then hit on apply and ok , done power is 25db .
Not applicable. I am not using RouterOS.

tgrand/lazerusrm: Thanks for info. Was just wondering if it's possible to squeeze a bit more range out of it.
 
User avatar
normis
MikroTik Support
MikroTik Support
Posts: 26322
Joined: Fri May 28, 2004 11:04 am
Location: Riga, Latvia

Re: R52Hn txpower setting

Tue May 10, 2011 8:55 am

RouterOS uses special custom driver which allows you to use it at it's actual power. Linux doesn't have such drivers.
 
luckysunny
Frequent Visitor
Frequent Visitor
Posts: 58
Joined: Mon Nov 22, 2010 6:21 pm

Re: R52Hn txpower setting

Sun Mar 25, 2012 1:12 pm

i m facing a problem .

Last from 1 year i m using TP-Link 5110g Access Point in my main point , Recently i Buy Mikrotik Router Board RB433ah + R52Hn Card . i Set all Ap setting in Rb433ah . But Face a Signal Problem . i have external signal booster amplifier . i attached it with r52hn card . but i face low signal . :( .. how to use external amplifier with r52hn ? or external amplifier is best for r52hn ? Please Guide me Mikrotik Support team .

Normis you also please tell me
 
0ldman
Forum Guru
Forum Guru
Posts: 1465
Joined: Thu Jul 27, 2006 5:01 am

Re: R52Hn txpower setting

Mon Mar 26, 2012 4:15 pm

RouterOS uses special custom driver which allows you to use it at it's actual power. Linux doesn't have such drivers.
So does this mean that the card doesn't deliver its maximum power by default?
 
User avatar
normis
MikroTik Support
MikroTik Support
Posts: 26322
Joined: Fri May 28, 2004 11:04 am
Location: Riga, Latvia

Re: R52Hn txpower setting

Tue Mar 27, 2012 8:34 am

RouterOS uses special custom driver which allows you to use it at it's actual power. Linux doesn't have such drivers.
So does this mean that the card doesn't deliver its maximum power by default?
it does by default in MikroTik RouterOS. it doesn't by default in other OS.
 
0ldman
Forum Guru
Forum Guru
Posts: 1465
Joined: Thu Jul 27, 2006 5:01 am

Re: R52Hn txpower setting

Thu Mar 29, 2012 7:22 pm

That is what I thought you were saying, just wanted to be certain.

Do any other MT mini PCI cards work like that?
 
waqas4u321
just joined
Posts: 3
Joined: Tue Oct 19, 2010 5:03 pm

Re: R52Hn txpower setting

Sat Apr 07, 2012 5:55 pm

i m facing a problem .

Last from 1 year i m using TP-Link 5110g Access Point in my main point , Recently i Buy Mikrotik Router Board RB433ah + R52Hn Card . i Set all Ap setting in Rb433ah . But Face a Signal Problem . i have external signal booster amplifier . i attached it with r52hn card . but i face low signal . :( .. how to use external amplifier with r52hn ? or external amplifier is best for r52hn ? Please Guide me Mikrotik Support team .

Normis you also please tell me
 
waqas4u321
just joined
Posts: 3
Joined: Tue Oct 19, 2010 5:03 pm

Re: R52Hn txpower setting

Sat Apr 07, 2012 5:58 pm

RouterOS uses special custom driver which allows you to use it at it's actual power. Linux doesn't have such drivers.
Dear please check your antenna or amp cables n once check your clients signals with amp. n without amp. one more thing how many do you have and what kind of equipment are you using at client end ?

Who is online

Users browsing this forum: No registered users and 21 guests