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whitestargh
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poor performance with R52HN with NV2 ROS5.7

Thu Nov 17, 2011 4:58 am

Hello Folks

I have currently set a 10km PtP link with two RB433 boards each fed with the R52Hn minipci cards to ubnt rocket dish 343bi

unfortunately i cant even get 10mbps down and 10mbps on the link. I see people are posting 150 and 300 mbps for over 14km and 50km here.

I presume am doing something wrong.

what is the significance of "current-ofdm-errors" ? which my own keeps rising 11615
or could it be the choice of radio cards (i have R52HN). if they are not good should i consider the DBii F52N-PRO or the UBNT SR71-15 minipci cards

please find screenshot of client side radio stats attach

where can i get the 5.9 routeros to try out.

thanks
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uldis
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Re: poor performance with R52HN with NV2 ROS5.7

Thu Nov 17, 2011 11:06 am

please email to support@mikrotik.com and we will provide you with a test release of v5.9 which has improvements for the Nv2 wireless protocol.
 
wirelesswaves
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Re: poor performance with R52HN with NV2 ROS5.7

Thu Nov 17, 2011 5:48 pm

Are you kidding! get those signal levels sorted out first! Maybe your antennas are not aligned! Without using a calculator and based on experience alone, I would say that you are 20-25dB short on signal.

Do you have one of the antennas with chains crossed over.
 
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Caelis
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Re: poor performance with R52HN with NV2 ROS5.7

Thu Nov 17, 2011 7:05 pm

Its crossed over and the noise levels are very high, try another channel, do a frequency usage scan and use the less usage channel
Love Wireless XD
 
ugn
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Re: poor performance with R52HN with NV2 ROS5.7

Fri Nov 18, 2011 12:44 pm

any updates here?
 
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mahnet
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Re: poor performance with R52HN with NV2 ROS5.7

Sat Nov 19, 2011 9:13 pm

most certainly i too see some alignment issues in ur link ...10 km with 32dbi grid antenna should be around -55 signal or check ur pigtails.
as per speed i have never seen any link practically do a 150mbps or 300mbps actual throughput.
i have links where the wireless does connect at 150 mbps with r52hn but that too gives 14-15mbps up/down and i am satisfied with it. even i am surprised under what scenarios do these guys exhibit 150 mbps throughput??
 
Fux
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Re: poor performance with R52HN with NV2 ROS5.7

Tue Nov 22, 2011 11:09 pm

Its crossed over and the noise levels are very high, try another channel, do a frequency usage scan and use the less usage channel
I don't understand: -110 dB is a high noise level???

All my antennas have -110 dB what is - i think - the detection minimum of the cards. They are working fine.

Please explain where you see a high noise level!

Kind regards
Fux
 
WirelessRudy
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Re: poor performance with R52HN with NV2 ROS5.7

Tue Nov 22, 2011 11:28 pm

Its crossed over and the noise levels are very high, try another channel, do a frequency usage scan and use the less usage channel
The signal levels might give the conclusion it is cross connected (what is H-pol is connected to the V-pol part of the antenna on the other end and vv.).
I don't understand: -110 dB is a high noise level??? All my antennas have -110 dB what is - i think - the detection minimum of the cards. They are working fine.
No, he made a mistake here. -110 is very low. SNR is also good so that's not the problem here.

Please explain where you see a high noise level!

Kind regards
Fux
But in general the signal levels are verly low. That could be much better. And if signals on both ends for all chains are in -40 - - 65 range the high througputs as shown by many are indeed possible, specially with NV2
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Rudy R. Puister

WISP operator based on MT routerboard & ROS.

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