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From: smasters@gmuvax2.gmu.edu (Shawn Masters)
Newsgroups: sci.electronics
Subject: Re: "spiking" of cable-TV descramblers
Summary: Two way amps
Message-ID: <1991May29.213012.13192@gmuvax2.gmu.edu>
Date: 29 May 91 21:30:12 GMT
References: <1991May23.190150.3982@rodan.acs.syr.edu> <1991May27.150924.3482@jts.com> <4207@jethro.Corp.Sun.COM>
Organization: George Mason University, Fairfax, Va.
Lines: 17


	Having a fair size broadband cable system here under our
department, I'm familiar with the amps that your talking about that are
two ways.  They all have modules that can be pulled out for either
direction.  This allows for smaller power consumption(so you have to
insert fewer power inserters), MUCH easier balancing, and more
channels.  Remember to have data going two ways, you have to have two
different frequencies.  One to amplify in one direction the other to
amplify in the other.
	Sytek(now Hughes Lan Systems), had once told my department that
they had help run Media General(fairfax county cable) two ways in small
areas for test or communication purposes to sell to the local companies.
The extent of this we never found out, but I know the amps they use by
my house are ONE-WAY.

Shawn C. Masters
smasters@cns01.gmu.edu