Wireless Access

Hi Dears,

hwat is the best way to allign 2000 Meter Mesh link between 2x MST200 and what will be the expected data rates and throughut on distance like this as per Datasheets MST200 can support 7.5 KiloMeter so waiting you asistance

Do you have line of sight and clear visibility? If so, then there are a couple of ways, one is free and one requires some expensive hardware.

For the free method, you need a compas, declinometer (consturction equipment, at Lowes or Home Depot), and Google Earth is a plus (or a handheld GPS unit). Capture GPS and elevation, etc. From there you can calculate with google earth or your GPS coordinate headings (X degrees + or - from due north). If one site is above or below the other you also need to account for uptilt or downtilt on each end. Once close you can have a partner on the other end make small changes in heading and log in to the MST200s to monitor SNR/RSSI, make a small change, monitor for a minute to see if it improves or not, etc. Will take trial and error. 

For the expensive method, you can buy/build special laser alignment tools, there's lots of examples on the internet.

Throughput at 2km should be approx 40Mbps HT20, or 60-70Mbps HT40, depending on how you deploy (L2 or L3). 

Here is a short video from our Director of Outdoor Solutions Engineering showing some of the methods he uses for antenna allignment:

https://www.youtube.com/watch?v=1WmKfxMPxus

Thank you so much I just also noticed something on 20MHZ link quality was 17% when I changed it to 40MHZ I wasn't able to get any link why is that?

You link isn't strong enough to support HT20 more than likely, at the threshold configured. HT40 requires better signal/SNR. If your link is 2km and you only have 17% of signal, you need to either align them better or identify what is blocking the signal.

How high are they off the ground (for fresnel clearance), what is between the two antennas (line of sight obstructins, trees, fences, power lines, etc)?

there was trees in freznl zone but we will go higher but I found something strange on outdoor planner it said :

You will need to provide the KMZ with the placemarks set, your intended design, antennas with headings/azimuth, etc. You would get that notice if the distance was too far, or alignment was not correct.