Hi,
New to the forum and have been looking at previous posts for help but none seem to match our issue.
We have been using Mikrotik very successfully for deploying fixed and tempoary links for many years now.
We recently deployed a solution for a customer as follows:-
2 links made up of RB411 and R52 radio boards all running OS 4.9 and using 20dbi panel antennas
The links are returning an RX signal strength of -75db approx
CCQ is approx 70/90 on both links
The links are in the 5.7Ghz band and are point to point
We are presenting the links with ordinary broadband at a download speed of approx 20mB and an upload speed of approx 10mB.
After our first link hop we drop to 2mB download and 1mB upload
After the second hop it drops to approx 1mB download and 0.5mB upload.
We did start on OS 3.15 and 2.9.5 and with the help of our local support engineer (who is great by the way and is stumped also) we upgraded to 4.9. We have clear LOS and plenty of height on all antennas. We did change all kit to ensure nothing was wrong there.
The link paths are approx 5kms long and varying output power did not seem to change the throughput.
Does anyone have any suggestions as to what is wrong?
That signal doesnt seem right to me. I would have expected something in the low 60’s.
Maybe check out the path loss using a piece of software or by simple calcs. I think it would be roughly around 120dB.
And you have 20+20+20, hence around the 60’s would have been expected.
Certainly if you are trying to push that amount, you need a better signal than you have.
Try swapping out the radios for Ubiquity SR5 or XR5.. I haven’t fiddled with 11n yet, but others are now beginning to have good success.
Obviously you have checked alignment and polarity of antennas!!.. And got rid of those cheap and nasty pigtails!
Maybe 1 card is deaf!, this used to be a problem with the R52h range, but I have to say that the last batch I have received, all seem good.
Have you tried a bandwidth test of half of the link at any one time, with the other radio cards disabled!
Thanks for the response.
We have had this network setup now for a few years in the same format.
We did bandwidth test half of the network at a time from a mid point and tested the “outside world” connection directly and did get good results but when we connected to the “outside world” we lost nearly all of the available “outside world” bandwidth. We were running other applications on the “closed network” that were running fine at various bandwidths it was just the internet connectivity that was an issue.
We are sure the polarities were correct. We dont currently have access to other radio boards as we have never had any issues with the R52 range so did not look else where. The paths are fine - we used a prediction tool here in teh office and there was clear line of sight well above ground level.
Any other suggestions gratefully received.