Date: Tue, 10 Jun 1997 18:20:44 -0500 (CDT) From: "Tom T. Thai" <tomthai@future.net> To: Bernie Doehner <bad@uhf.wireless.net> Cc: isp@freebsd.org Subject: Re: Wavelan ISA Card??? Message-ID: <Pine.BSD.3.91.970610181653.3707A-100000@dream.future.net> In-Reply-To: <Pine.BSF.3.95.970610185903.3555C-100000@uhf.wdc.net>
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On Tue, 10 Jun 1997, Bernie Doehner wrote: > > > > > > But no foliage or change in ground elevation? > > > > not much change in ground level. > > What about trees?? At these frequencies trees absorb pretty well. > (especialy nearfield - like in your back yard, which would be in line with > the direction of the signal to your office?) it's a city so not may tries.. some in the streets along the sidewalks. > > > Also, what town/city are we talking about? 900 Mhz. is unuseable in many > > > larger cities (especialy in southern Cal.), because of interference from > > > Metricom and lojack like systems. > > Do you by any chance of access to a spectrum analyzer? And is someone > on your staff into two-way radio? (Like a ham radio operator? Or would you > need more of a plug and play solution? No one like that here, but if you give me some references, I'll try it myself :) PnP is fine, but I like to learn too. Can I lease or buy the spectrum analyzer? > The reason I am asking you this, is that it would be nice to find out how > useable the spectrum is, BEFORE you buy equipment for either 900 or 2.4. > If you can get away with 900 (no interference), than it'd be better. I read up on the BreezeCom wireless lans hardware, sounds pretty cool. I think it's 2.4 hoping spectrum if I remember right. > > > I see 900mhz phones used and sold here.. so I think it's ok :) am in > > Minneapolis, MN > > Well yes, they are rather low power (like 1mW), but the Wavelans are also > pretty deaf as compared to some of the better point to point stuff on the > market - like the Freewave radios, but they run around $1200/piece. > > Btw, additional cost if you do it yourself: > > $70-140 X 2 for two 900 MHz. yagis (suggest 13 element - longest you can > get. they are about 6' long). Price depends on ruggedness and > manufacturer. > > $0.50/ft. if you buy good RF cable. On one of the installations we've > done, the run was short, so we chopped the 15-20' RG-59 cable that > attaches to the patch antenna and put an N connector on it to connect to a > yagi. Worked well, no additional cable cost. > > Also, something to keep in mind, is that the new Wavelans use this screwy > connector that we could only get from NCR/Lucent (another reason for using > the RG-59 cable if the run is short. hmm.. .............. .................................... Thomas T. Thai Infomedia Interactive Communications tom@iic.net TEL 612.376.9090 * FAX 612.376.9087
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