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Airplane777
join:2004-06-20
2 edits | reply to nwn
Re: WISP site survey poles ?
Hi Scott:
Thanks for the pictures. Thats a neat idea...just using wood to go into your trailer hitch.
I see you just clamp the pole a little further up to the bar on your truck.
How high can you go with your pole?
What kind of telescoping pole do you use?
Which company is SB Outdoor? I don't know the wireless companies all that well yet. | |
nwn
Premium
join:2004-03-05
Centerville, IN
| reply to Airplane777
Truck Mount1 | 
Truck Mount2 |
I use a sB Outdoor and a 19dB grid for all sight surveys. I then calculate what antenna and radio to use.
My county has GIS maps available, so I get the latitude and longitude of the TV tower, or roof peak. I then use the tools at »gbppr.dyndns.org:8080/path.main.cgi to determine aximuth, up/down tilt, distance, etc. This one is nice, it even allows one to put in trees and buildings. I get that from the GIS map.
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Scott | |
Airplane777
join:2004-06-20
4 edits | reply to jdmarti1
Hi jdmarti1:
Come to think of it, you are right about the van being driven onto their yard.
I didn't see a tripod at Lowe's today. That must be some kind of monster tripod to hold this heavy 30 foot pole.
On the other hand, maybe a pole on my van would let me go to various places in the neighborhood, just to get an idea how far the signal will go. But knowing that ultimately I will have to go on a customers roof to be sure the signal gets there also.
Do most people just put the CPE and its built in antenna on the pole, and probably do a continuous ping? Also hopefully the CPE device will have some kind of signal strength indication. Are they the best two indicators of a WISP site survey.
Or, I could mount just an antenna by itself on top of the pole and use real low loss coax (like LMR 400 or larger) to go to the ground where my laptop and Orinoro Gold card are located? That seems the most practical way to do the site survey. I would just have to take into consideration the loss of the coax. That shouldn't be too difficult to do, knowing the loss per hundred feet or per foot.
Gee, if I did it that way, I could use my Orinoco Gold card to easily find the best positioning of the antenna...knowing that I will ultimately have to use a CPE with its antenna, in that same exact position. Hopefully the CPE with its built in antenna, can receive as well (or better) then my Orinoco Gold card on the long coax. The antenna I would use in the CPE and the antenna by itself on the pole, would naturally be matched up as best as best as possible (forward gain, front to back ratio, V & H beam width, etc.)
And my Orinoco Gold card will give me Signal strength, signal to noise ratio, packets sent and lost, etc (as long as my AP has the right chip set).
Again, hopefully the CPE device would have a better transmitter and receiver in it then my Orinoco Gold card. It's too bad that the CPEs can't give as much information as the Client Software that is on the Gold card.
I assume that in most cases a WISP CPE will not give Signal to Noise and Signal strength and packets sent and lost, like I get when I do hotel WiFi site surveys with an Orinoco Gold card could.
I imagine a CPE with only an Ethernet connection to the laptop will not be able to give that kind of information...probably just relative signal strength and maybe continuous pings to at least see if packets are lost or not.
So hopefully I will be able to get some kind of meaningful information of how to point the CPE for best signal reception, since I probably won't have good site survey software to use with it. Seems continuous pings and relative signal strength might be the best I can hope for when doing a site survey with a WISP CPE?
Thanks | |
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