[Madwifi-users] 15 mile XR5 5Ghz link with two 29dB dishes - great link - poor throughput
Status: Beta
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From: Derek C. <de...@ri...> - 2008-01-07 20:57:18
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Hi all, I've had a good time setting up a 15 mile point-to-point link with two 29dB parabolic dish antennas and Ubiquity XR5 802.11a cards. The link stats look great with iwconfig - right now its reading -50 signal, -94 noise and 44/94 link quality. I'm at 5.18 Ghz. I'm using Voyage linux (0.4.1). Whats funny is that my data throughput is really poor - iperf keeps giving me around 600 kbps. Typing with ssh feels fine and pings are really good at around 1.5 ms. I've tried playing around with athctrl -d and I've found that a distance of 13,000 seems to give the highest throughput - a figure of 20,000 seems to lower my throughput to around 400kbps. I have another new link up of around 7 miles and with badly aimed lower gain antennas I'm getting around 13Mbps. Is there some other settings that I should alter other than just using the athctrl command? This 15 mile link is over a city (although very directional antennas) and I don't see other 802.11a APs with iwlist scanning. I'm not sure if there is other interference out there (although noise looks very low). At 5.8 Ghz the noise is higher (-87) and throughput is much the same. Any help would be great thanks very much, Derek |