From: berk@techsys.mcws.fidonet.org (Berk Walker) Subject: Re: Modem and noise problems - Please help Date: Sat, 07 Aug 1993 07:15:50 PDT
> >
> >Otherwise, hook up an oscilloscope on the phone line and look for
> >disturbances. Or call your local phone company.
>
> O-scopes are nice things... but they are almost ALL made with an
> unbalanced input. If you connect that to the phone line, which
> is really a balanced transmission line, you will *cause* it to
> have all of the symtoms the original article described!
>
> Floyd
>
>
> --
Most 'scopes have two inputs. If you use A+B (inverted) yu will have a
balanced, isolated input. <include "o"> ^.
Berk