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fbi
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can't decrease tx power on RB 911

Fri May 17, 2013 10:26 pm

Hi all,


We had changed some single polarized (Metal Groove) ptp links into dual polarized RB 911 links. We had used manual tx power settings on the Metal Grooves to decrease the tx power. It worked well, but since when we have been using the new RB 911's, we can't decrease the tx power. If I set the tx power mode into manual and fill in dBm values ​​in the tx power tab, the current tx power tab shows the default tx power values.
I have tried it with ROS 5.25. Anybody have experienced it yet?
 
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ohara
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Odp: can't decrease tx power on RB 911

Fri May 17, 2013 10:30 pm

Try all rates fixed instead of card rates
 
fbi
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Joined: Fri Nov 04, 2011 11:38 am
Location: Miskolc, Hungary

Re: can't decrease tx power on RB 911

Sat May 18, 2013 9:44 pm

I have tried the manual setting, to fine tuning the radio in each modulation type. It works well any other board except RB 911.
 
scampbell
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Re: can't decrease tx power on RB 911

Sun May 19, 2013 6:18 am

I've seen this also on RB951G-2HnD and RB2011UAS-2HnD.

Apparently it is a chipset issue.....

see http://forum.mikrotik.com/viewtopic.php?f=1&t=68141
 
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normis
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Re: can't decrease tx power on RB 911

Mon May 20, 2013 3:26 pm

Like explained already. You can use only tx-power-mode=all-rates-fixed or use the frequency-mode regulatory-domain for lowering the tx-power signal, due to limitations of the chipset.
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