I'm having a real problem establishing a 3km link. Either side are Dlink900AP+, one in AP mode, the other in client mode. The AP is connected to a 19dB parabolic, the client to a 15dB panel antenna. Site survey by the client sees the AP and connects, but the connection is flakey- keeps being dropped and larger ping packets >256 do not get through.
Attaching the panel to an Orinoco Silver card and measuring signal levels via Netstumbler shows intermittent peaks of around -60dB (once every 5 secs or so) with the rest of the time signal being -90dB. This happens with various cables, antennae etc. so I am sure it is not a kit problem. The panel, parabolic and cables check out OK. Measuring output from the AP shows a regular strong normal signal. The two sites are either side of a valley with clear Fresnel zone. Only 1 house 20m below signal path and a river 40m below signal path. The parabolic is mounted 2m off the ground, the panel 5m but has a lower barn roof made of asbestos 3m below it. The panel is mounted against a wooden barn wall. Take the panel off the barn and the signal strength settles at around -70dB Aaargh! Can anybody help?! Does multipath cause sig strengh to fluctuate so wildly? Thanks John Taylor -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
