Guys Please helps to choose product for below mentioned links.
- Point to point links of distance 19.5Kms and 15 Kms.
Topography of Wireless Network.pdf (37.3 KB)
I am willing to do some path analysis for you if you like. However for a 20km I would recommend a 2’ or 3’ dish and an rb911 radio board and a good enclosure. If you would like more info on the hardware I can send that as well. If the path is good then you can easily get over 50Mbps. What country are you in? Do you know what frequency is free and what your max EIRP is for your country?
Hi joshaven,thanks for your reply, nice to hear from you. please find our coordinates below.
we are located in India, 2.4Ghz and 5.8Ghz are free bands here. we can use max. above 50dB.
Location A:
N : 16.35.43.3
E: 79.43.56.8
Location B:
N : 16.33.14.8
E: 79.33.15.3
Location C:
N : 16.28.27.2
E: 79.26.02.5
This link should work with the following hardware:
RB912UAG-5HPnD-OUT http://routerboard.com/RB912UAG-5HPnD-OUT
30DBi ARC-DA5830SD1 http://www.antennas.com/dish-antennas-2/dual-pol-dish-antennas/
RPSMA-NM-240-36 http://www.ispsupplies.com/categories/Our-Picks/RPSMA-NM-L240-36.html
All of the above hardware could be substituted for like hardware.
With proper antenna alignment and low noise you can expect these radios to fully modulate. You will be able to get between 50Mbps and 100Mbps half duplex on either of the links with a 20MHz channel width. A 10MHz channel width will give you between 25Mbps and 50Mbps. I expect the higher numbers that I am giving you. I don’t know anything about the rules for wireless in India so be sure to double check the numbers I used for the calculation which are pictured below. The info below is based upon a 200Watt (53dBm) max EIRP which is US regulation for UNII-3. You need to see more the 30dB of signal to noise to get links that you will be happy with. If your noise floor is -100dB or better then you will see at least 50dB SNR with either of the links. However if your seeing -70dB or worse of noise then these links will not perform well at all. If you have a noise concern but still expect the links to work then I would recommend moving up to the 3 foot dish which will give you better signal and be more directional which will likely reduce noise.
Thanks for your work and information Joshaven. you have done link evaluation for wrong coordinates. Please check if possible.
Sorry, I wasn’t familiar with the notation you used for the locations. I assumed you were using Decimal notation (16.35433) rather then Degrees Minutes and Seconds (16º 35" 43.3’). Here are the adjusted path’s. As long as the paths are as clear as they look you should be fine. I am not seeing much vegetation or many buildings in the path. If this is not true then its possible that the terrain is not working properly in my mapping software. I would recommend paying special attention to the land cover on the peaks of the hills between sites A & B. If the land cover info is accurate then you should have great luck with the equipment I suggested. I would recommend staying with the 3’ Dish and not bothering with a 2’ dish. You also need very low noise levels. If I was planning these links in my area I would be very confident in it working at 80 Mbps or more. We generally don’t have too much noise here and I know the land cover data is pretty accurate for Michigan, USA.
