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Article #374Re: running network cable through windows and walls?
From: Smith and O'Halloran
Date: Sun, 30 Aug 1998 00:00
Date: Sun, 30 Aug 1998 00:00
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In article <35e6319c.53011606@news.lakwod1.co.home.com>, Aaron Blosser <blosser@home.com> wrote: >On Fri, 21 Aug 1998 11:07:04 -0500, Daniel Erskine >For short runs of cable, I highly doubt that using 50ohm vs. 75ohm would >make a difference. That measurement is a measure of the cable's >impedance over some distance (1000 ft?), so for a short bit of maybe >50-100 ft, the difference *may* be neglible. Oh, it does make a difference. Even a two-inch length of the wrong cable causes reflections. The characteristic impedance of a cable is the same as value of the resistor that can terminate the cable without causing reflections or anti-reflections; it has nothing to due with the length of the cable. -Joe -- INWAP.COM is Joe and Sally Smith, John and Chris O'Halloran and our cats See http://www.inwap.com/ for "ReBoot", PDP-10, and Clan MacLeod.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 113850,4e89f3904072fcfe X-Google-Attributes: gid113850,public X-Google-Thread: 1159e3,4e89f3904072fcfe X-Google-Attributes: gid1159e3,public X-Google-Thread: fa874,4e89f3904072fcfe X-Google-Attributes: gidfa874,public From: inwap@best.com (Smith and O'Halloran) Subject: Re: running network cable through windows and walls? Date: 1998/08/30 Message-ID: <6sdefd$jqn$1@shell3.ba.best.com> X-Deja-AN: 386355517 References: <6rcoho$284$1@nnrp1.dejanews.com> <slrn6tp9oi.em3.danco@pebble.org> <35DD9B28.4FC620A7@edwardjones.com> <35e6319c.53011606@news.lakwod1.co.home.com> X-Trace: 904543535 3173 inwap 206.184.139.132 Organization: Chez INWAP (people, computers, cats) Newsgroups: comp.dcom.modems.cable,ba.internet,alt.home.repair