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Date Posted: 19:58:55 07/26/02 Fri
Author: Jain
Subject: Re: Rogers New Coding
In reply to: Vlad 's message, "Rogers New Coding" on 10:09:56 07/03/02 Wed

OK, I had finaly the chance to take a look at he signal. What Rogers did was to split the Hsync pulse and the video is inverted on all scrambled channels. Somehow, channel 62 is slightly different, and the discrambler doesn't lock on it. Canton 3 and all similar schematics work fine with Rev 7t 1a, but you have to take care of the inversion.
What MagicFly did is wonderfull, but it doesn't help in this case (sorry MF, I don't speak hungarian).
Jain

>I have implemented Canton3 with R7t1a code on C54JW.
>Picture looks awful on Bamsung box. If you adjust it
>on normal channels,it is OK, but scrambled won't lock.
>When I lock scrambled channels, regular ones are
>inverted. You can changer inversion, but than
>scrambled are inverted. When I have lock, picture is
>wavy. With the old Zenith box (with PAL test-chip)
>picture was perfect.
>Does anyone know Rogers did, I still suspect same
>coding, but another complete inversion of scrambled
>channels. It started one day with 3 channels unable to
>descramble and 2 lower channels still fine, and than
>the next day all channels were non-detectable. Is
>there any solution to fix old Zenith box - schematics,
>data, anything.
>
>Thanks,
>Max

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