Community discussions

MikroTik App
 
gladstonreis
just joined
Topic Author
Posts: 17
Joined: Wed Jun 04, 2008 3:43 am

Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Tue Dec 29, 2015 2:13 am

Dears

I have some problem in my wireless link. The signal is strenght, CCQ RX is 98/100% and low CCQ in tx rates ( 37, 44%). I tried anything, change channel, modulation, etc. I need help

Thank you
You do not have the required permissions to view the files attached to this post.
 
InoX
Forum Guru
Forum Guru
Posts: 1966
Joined: Tue Jan 09, 2007 6:44 pm

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Tue Dec 29, 2015 2:58 am

Do you have more radios near by? It looks like interference to me.
 
gladstonreis
just joined
Topic Author
Posts: 17
Joined: Wed Jun 04, 2008 3:43 am

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Tue Dec 29, 2015 3:22 pm

Do you have more radios near by? It looks like interference to me.
There is some radios, but not in same channel. The frequency usage show me that don't have used channels.
 
InoX
Forum Guru
Forum Guru
Posts: 1966
Joined: Tue Jan 09, 2007 6:44 pm

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Tue Dec 29, 2015 6:33 pm

It doesn't matter, interference can exist..
 
User avatar
ZeroByte
Forum Guru
Forum Guru
Posts: 4047
Joined: Wed May 11, 2011 6:08 pm

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Tue Dec 29, 2015 6:40 pm

Don't forget that you're using a 40mhz channel which is more susceptible to interference.

Suppose that your receiver is located near another receiver on a similar channel - did you do your spectrum analysis at the client site?
 
gladstonreis
just joined
Topic Author
Posts: 17
Joined: Wed Jun 04, 2008 3:43 am

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Wed Dec 30, 2015 2:36 am

Don't forget that you're using a 40mhz channel which is more susceptible to interference.

Suppose that your receiver is located near another receiver on a similar channel - did you do your spectrum analysis at the client site?
Yes I did. I''ll try change to 20mhz channel. I think this really is interference.


thanks all
 
n21roadie
Forum Guru
Forum Guru
Posts: 1949
Joined: Fri Aug 07, 2009 10:36 pm
Location: Limerick,Ireland

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Wed Dec 30, 2015 8:10 pm

Don't forget that you're using a 40mhz channel which is more susceptible to interference.

Suppose that your receiver is located near another receiver on a similar channel - did you do your spectrum analysis at the client site?
Yes I did. I''ll try change to 20mhz channel. I think this really is interference.


thanks all
On both sides what other signal levels present when a frequency scan is done?
 
gladstonreis
just joined
Topic Author
Posts: 17
Joined: Wed Jun 04, 2008 3:43 am

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Thu Dec 31, 2015 1:29 am

Don't forget that you're using a 40mhz channel which is more susceptible to interference.

Suppose that your receiver is located near another receiver on a similar channel - did you do your spectrum analysis at the client site?
Yes I did. I''ll try change to 20mhz channel. I think this really is interference.


thanks all
On both sides what other signal levels present when a frequency scan is done?
In other side there is no interference, because it is in the jungle, no radios, no wifi.
 
xezen
Long time Member
Long time Member
Posts: 628
Joined: Fri May 30, 2008 10:23 am
Location: South Africa

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Thu Dec 31, 2015 1:37 pm

is it clear line of site as it can be water in a tree
 
n21roadie
Forum Guru
Forum Guru
Posts: 1949
Joined: Fri Aug 07, 2009 10:36 pm
Location: Limerick,Ireland

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Thu Dec 31, 2015 3:01 pm


In other side there is no interference, because it is in the jungle, no radios, no wifi.
Have you good Fresnel clearance on this link?
 
gladstonreis
just joined
Topic Author
Posts: 17
Joined: Wed Jun 04, 2008 3:43 am

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Fri Jan 01, 2016 6:40 pm


In other side there is no interference, because it is in the jungle, no radios, no wifi.
Have you good Fresnel clearance on this link?
Yes.
 
Arcee
Member Candidate
Member Candidate
Posts: 272
Joined: Fri Jun 27, 2014 2:33 pm

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Mon Jan 04, 2016 8:47 pm

Has this been resolved?

I have a similar problem; I would like to know what the issue was.
 
Lupin
Member Candidate
Member Candidate
Posts: 267
Joined: Mon Feb 16, 2009 10:22 pm
Location: Italy

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Tue Jan 05, 2016 11:34 am

Dears

I have some problem in my wireless link. The signal is strenght, CCQ RX is 98/100% and low CCQ in tx rates ( 37, 44%). I tried anything, change channel, modulation, etc. I need help

Thank you
on AP and Station:
- what antenna do you use ? (gain)
- what are Tx Power? (default?)
- what rf-cable you use?
- how many km are the link?
 
davidpili
just joined
Posts: 4
Joined: Thu Dec 31, 2015 2:22 am

Re: Strenght signal ( -53/-56) but low TX CCQ and high RX CCQ - NV2

Tue Jan 05, 2016 12:12 pm

Pull spectrum from the side that has the low rx ccq, if there are ANY signals over roughly -50db this will happen no matter what you do. To the best of my knowledge this is due to mikrotik and almost all other wifi based manufacturers using very wideband receivers with fairly poor selectivity, active filtering like cambiums 450i platform or a superheterodyne receiver would go a long way towards resolving this but that adds to the cost.

I had a pair of SXTs that were doing this and it drove me up the wall, it finally clicked and I moved the problematic SXT about 4 feet from its closest 5ghz neighbor and just like that 99-100% ccq on both sides.

If you look around you can find stuff that's similar to rf armor for the sxt units, it helps keep them isolated and also keeps their fairly dirty radiation pattern from impacting other devices.

Who is online

Users browsing this forum: No registered users and 102 guests