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Date Posted: 16:03:18 09/02/01 Sun
Author: Rex
Subject: Re: Need info about the 3Chip design
In reply to: 2D 's message, "Need info about the 3Chip design" on 18:53:40 09/01/01 Sat

>I don't know which 3Chip design was used (or if it's
>one of the 3Chip design at all). However, by looking
>at the different 3Chip design, they look similar to my
>board, but none are exactly the same. What I know is
>that my descrambler uses a PIC16C54-XT/P, a LM339
>14pin chip and a TA7607AP 16pin chip.

The TA7607AP is a sound detector chip. I would assume that
this descrambler takes in signal from a converter at Ch3/4.
I would assume that it tries to extract the sound carrier
and use that to generate timing to drive RF attentuator.

I don't think this is the same 3 chip design that takes in
composite video signal.

Would be interesting to see this box though...

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