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34km link low CCQ

Posted: Thu Mar 28, 2019 8:24 pm
by Wolfraider
We have setup a 34km link, signals are bouncing around between -65 and -48dBm. CCQ is running between 40 and 64%. We dont see much in the way of interference. Anyone have any ideas on how to tune this link? We spent around a couple of hours finely tuning the alignment.

Both radios are a NetMetal 5SHP.
Hooked to RocketDish 34DB Dishes.
One side is mounted roughly 6ft from the top of a large water tower. Around 160ft in the air. Lots of competitors are on the tower with us.
Other side is mounted 185ft on side of a tower. We are the only ones on the tower, we kept our other radio frequencies far away from this one. around 15ft separation.
Complete line of site for the link and roughly 20ft from the estimated fernel zone.

This is our first Mikrotik Link, we have used Ubiquiti before.
Water Tower Signal.PNG
Water Tower Status.PNG
Water Tower Config.PNG
Tower Signal.PNG
Tower Config.PNG

Re: 34km link low CCQ

Posted: Thu Mar 28, 2019 10:43 pm
by mistry7
Is this a shot over Water?

Re: 34km link low CCQ

Posted: Thu Mar 28, 2019 10:56 pm
by Wolfraider
Nope, all over land. Running the link calculator, looks like the closest object to the Fresnel zone is 54ft away.
Link.PNG

Re: 34km link low CCQ

Posted: Thu Mar 28, 2019 11:25 pm
by AlainCasault
Have you tried the built-in tools to analyze the RF (scan, shopper)?

Have you also tried seeing it up as Greenfield, not a/n/AC?

Otherwise, signal levels are good... Snr good...



Sent from my cell phone. Sorry for the errors.


Re: 34km link low CCQ

Posted: Thu Mar 28, 2019 11:31 pm
by Wolfraider
Did not see much channel usage for this frequency in the snooper, freq usage or scan. What option is Greenfield. I am currently researching it.

Re: 34km link low CCQ

Posted: Fri Mar 29, 2019 6:56 am
by mistry7
We have no good Experience with Mikrotik at links with more then 10km
We build them with UBNT Airfiber, they Performe much better over such distances, I have a similar link here
32km
34 dBi Dishes
36 dBm allowed
Total BW 260MBit with 40Mhz Channel
Splitt into 200 down / 60 Up

Re: 34km link low CCQ

Posted: Fri Mar 29, 2019 4:12 pm
by Wolfraider
We actually just replaced our AirfiberX with the Mikrotiks. Getting double the bandwidth currently. We have heard that version 2 is alot better than version 1 but after the issues with the link we are reluctant to spend that kind of money if the Mikrotiks perform well. Signal on the Airfiber was -73, same 34db dishes and 36dbm allowed. X polarization installed and throughput was around 25Mb down, 3Mb up.

Re: 34km link low CCQ

Posted: Fri Mar 29, 2019 6:56 pm
by AlainCasault
Did not see much channel usage for this frequency in the snooper, freq usage or scan. What option is Greenfield. I am currently researching it.
It's an expression meaning that you don't mix modes (a/n/ac) but rather stick with just one (ac).


Sent from my cell phone. Sorry for the errors.


Re: 34km link low CCQ

Posted: Fri Mar 29, 2019 7:29 pm
by Wolfraider
Ok thanks, we was already thinking about changing that. We will test Sunday.

Re: 34km link low CCQ

Posted: Sat Mar 30, 2019 9:46 pm
by neutronlaser
Use that mikrotik protocol thing

Re: 34km link low CCQ

Posted: Mon Apr 01, 2019 4:00 pm
by AlainCasault
Use that mikrotik protocol thing
NV2 ;)

Sent from my cell phone. Sorry for the errors.


Re: 34km link low CCQ

Posted: Tue Apr 02, 2019 6:48 pm
by Steveocee
Have you tried reducing channel width? Try it at 20Mhz and see if the CCQ improves. If it is fine, bump it up to 40Mhz and retry until you find where it is bad.

Re: 34km link low CCQ

Posted: Tue Apr 02, 2019 7:51 pm
by Wolfraider
We tried that and no change in ccq. We changed from nv2 to nstream and we are currently running at 99% ccq. Signal level dropped to around 57. This link is rocking now. Currently ordering more netmetals to replace more links.

Re: 34km link low CCQ

Posted: Sat Apr 13, 2019 3:54 am
by marcin21
@Wolfraider
could You please share how much throughput You have achieved on this link?
and if You got something shorter like 10-15km running on netmetals with 80mhz channels?