Newsgroups: comp.dcom.lans
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: How to terminate a minimal thin ethernet segment?
Message-ID: <1991Apr5.205416.8741@zoo.toronto.edu>
Date: Fri, 5 Apr 1991 20:54:16 GMT
References: <1991Apr5.191653.28927@phri.nyu.edu>
Organization: U of Toronto Zoology

In article <1991Apr5.191653.28927@phri.nyu.edu> roy@alanine.phri.nyu.edu (Roy Smith) writes:
>...but I didn't have any more terminators handy.  What I did instead was
>to just take a 1/8th Watt 51-ohm resistor and connect it across the center
>and shield contacts right on the BNC jack.  Shouldn't that have been all I
>needed?  The box kept complaining about ethernet errors...

Plausible idea, but wrong resistance.  The cable is 50 ohms in *each
direction*, so the impedance seen at the BNC is 25, not 50.

1/8 watt also sounds a bit small, although perhaps it is okay.  If I
recall correctly, the standard recommends 1W terminator resistors, but
that is undoubtedly sized for a severe worst case.
-- 
"The stories one hears about putting up | Henry Spencer @ U of Toronto Zoology
SunOS 4.1.1 are all true."  -D. Harrison|  henry@zoo.toronto.edu  utzoo!henry