P2P link on 54km. We have problem.

RouterOS Wireless Networking
1

Hello people! We installed a point to point link on 54km in rural area, we have two 24dbi grid antenna and R52H(350mW), and the problem is that it doesn’t work. Can anyone help me? Maybe the link doesn’t work because we have grid antennas, and not parabolic?

2

24dBi it’s not enough for 54km link. Also you need 2 very high location.

3

We have two very high location, it’s not a problem.Can you tell me how many dbi i need for this distance

4

you can use this calculator to find out: http://www.mikrotik.com/test_link.php

5

I used this calculator and it shows me that link status “reliable”. Any idea?

6

as Inox said, 24dbi AND 350mW is not enough for 54km.
Post more details about your setup, antenna specs, type of cable and lenght, antenna height, configuration

7

I have 52km link with 1,2m parabolic dish with 5GHz MT feed on each side (I don’t know how many dBi is it ) and SR5 wireless cards.Signal strength is -65 to -78 depend on weather. All problem is right both antenna alignment with narrow antenna pattern. We start with 23dBi flat panel antenna on one side and dish on other. Align dish on max signal strength then replace flat panel with dish and align other dish.

8

You can use also this free calculator which is very intuitive: http://www.wavearena.eu/calculator

9

The choice of parabolic or mesh is up to you.. 24dbi from a mesh antenna is the same 24dbi from a parobolic.

But a mesh (from some suppliers) could fall apart after a while, whilst a mesh offers considerably less wind resistance. A parobolic looks more professional, is likely to last longer, but if installed badly, could blow away.

I agree that the calculators say its possible, but I would have to say that even if you did get it to work, you dont have any 10db fade margin built in.

Maybe try using 5Mhz spacing, just to get the background noise down a bit.. If you could actually get the ends to register that way, then you could play around with minute direction adjustments.

Is the other end clear line of sight, fresnel zones!! obstructions.

Check out pigtails and I have my own views on the R52H, which are probably best not to air here. (unless others can prove to me that their reliability has improved!!)

10

I would say that you need at least 28dBm Wireless Cards, or antennas with higher gain. However, it’s hard to tell without all details like antenna specification, type of cable and lenght etc.