Hello everyone
I make a 16Km link over sea and I have a 150m level deffrence.
I have a 30m tower from my stations and I use the Netmetal 5 and 29dbi dish antenna for this link. I get the -50 dbm signal strength but the ccq is very low (5%-15%) and I can’t get the good traffic through this link.
I user the very diffrent frequncy of 4900-6100 but it’s not much diffrent.
I have a 50dbm Signal to noise.
Please advise me how to get the better ccq and send / recive through this link.
Thanks you
Sea makes reflections of your signal, this is what causes the noise most likely. Some people use horizontal polarisation only, to partially improve the situation.
Indeed this can be quite problematic. The reflections are not really noise, but they have a different pathlength and they can cause interference that looks like noise.
We have a link over a sea arm (it uses Ubiquiti equipment but that does not matter for physics) and there is a definite effect of the tides on the signal.
When the water level rises or falls, the path length difference goes through some range and at some point the signal nearly drops.
W.r.t. polarisation: improvement can be expected from using circular polarisation.
Thanks for replays
Is it possible I get the better conditions if I use the horizontal polarization?
I have a -113dbm noise floor and 45dbm SNR also signal strength is -51dbm but I cann’t send the TCP traffic over this link upper than 5Mps.
I user Netmetal 5 and 19dbi hi performance dish antenna.
I have a parallel link with AirFiber 24HP (over sea 16Km) and signal strength -60dbm and 500Mps and 270Mps RX-TX