Currently we're setting up a wireless link in between two buildings about 1/2 mile away from each other and clear line of sight. For this, we're using 1310 Bridges and the AIR-ANT1949 (Yagi) antenna.
The problem that we noticed though is that the bridges do NOT have good performance, even in a controlled lab. With the two antennas sitting 10 feet away from each other, the best signal strength I get is -72dBm or so (one LED while in install mode). Moving to 20 or 100 feet, the best I can acheive is again one light. When I move the bridge to the same location where existing 1310 bridges are working, I get no association whatsoever.
Here are some details:
1. They are already set to max power (they are G radios).
2. The distance was already set to 1 as we are about 1/2 mile away.
3. Both bridges had been set to the least congested frequency which it found to be channel 9 at the time.
My concern is that if I can't get a good signal when the bridges are close to one another, should I expect to get one 1/2 mile away? Can anyone please tell me how good of a signal I should expect with these Yagi antennas if the two bridges are 10 feet apart? 100 feet apart?
Also, does anyone have any experience in how accurately must they be aimed?