Date: Sat, 10 Nov 2001 17:31:28 -0700 From: Warner Losh <imp@harmony.village.org> To: Brian Reichert <reichert@numachi.com> Cc: mobile@freebsd.org Subject: Re: an and wi ad-hoc talking Message-ID: <200111110031.fAB0VS767787@harmony.village.org> In-Reply-To: Your message of "Sat, 10 Nov 2001 18:29:00 EST." <20011110182900.Y327@numachi.com> References: <20011110182900.Y327@numachi.com> <200111102300.fAAN0g767233@harmony.village.org>
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In message <20011110182900.Y327@numachi.com> Brian Reichert writes: : On Sat, Nov 10, 2001 at 04:00:42PM -0700, Warner Losh wrote: : > OK. I have two Orinoco cards talking to each other in ah-hoc mode: : > : > These talk to each other great. They happen to be located 5.5 miles : > apart, and I'm able to get about 5Mbps out of the cards (averaged over : > a long file transfer). : : You got five-and-a-half _miles_ point-to-point with Orinoco cards?! : : Have you plugged some kind of external antenna on them? I though : they were only good for a few hundred yards... Oh, yes. I have two 24dBi dishes on each end. If it weren't for the trees on my end, we'd only need two 14dBi yagis. I don't get great signal: sig: -85, noise: -95, qual: 10 sig: -84, noise: -98, qual: 14 sig: -86, noise: -94, qual: 8 between them, but then again, I do get bits over them. I run them generally wired to 2Mbps, but in adverse weather I wire them at 1Mbps. In snow, I usually see about a 3-6dB increase in the noise, and a 5-10 dB decrease in the signal. Those of you that are quick at math will realize that this is larger than my link quality :-(. At sunrise/sunset we have intersting effects on link quality. We get the best signal at night (when it isn't frosting) and during the hottest part of the day. But that doesn't help me with my Cisco 340 card :-(. The Cisco card is attractive because I can get it it, in a ISA form factor, on Ebay for $99, which is price competitive with the wavelan + pcmcia bridge ($60-$90 + $20-$40) w/o some of the hassles. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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