Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- New 3C

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Date Posted: 09:08:35 02/01/02 Fri
Author: Tom
Subject: Re: AGC sampling added to Rev7t1d2. For Potter and Phil
In reply to: Jain 's message, "Re: AGC sampling added to Rev7t1d2. For Potter and Phil" on 05:18:48 02/01/02 Fri

If the VBI is not raised then sampling during the last 50% VBI would work and give a good AGC voltage. Unfortunately, many systems attenuate (or raise) the VBI. This causes the AGC to have too much gain and if it is sampled during this time, the overall gain will cause the video signal, when recombined with a regenerated sync, to be larger than 1vpp. This will make the contrast and brightness between scrambled and unscrambled channels to be different because the regenerated sync always stays the same size.

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Replies:

Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Potter, 20:42:59 02/01/02 Fri
- Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Jain, 16:54:47 02/03/02 Sun
  - Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Potter, 06:39:09 02/04/02 Mon
    - Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Phil Q., 09:50:48 02/04/02 Mon
      - Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Jain, 14:44:47 02/04/02 Mon
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Tom, 20:04:31 02/04/02 Mon
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Jain, 05:06:47 02/05/02 Tue
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Pooter, 06:09:07 02/05/02 Tue
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Jain, 09:47:50 02/05/02 Tue
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- raza30, 07:44:57 02/05/02 Tue
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Jain, 10:13:39 02/05/02 Tue
        Jain: I'd like to see your solution. -- sakman, 18:52:21 02/06/02 Wed
        Another 2 cents -- Potter, 06:01:04 02/09/02 Sat
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Martin, 23:47:58 02/10/02 Sun
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Pablo, 13:09:15 03/11/02 Mon
        Re: AGC sampling added to Rev7t1d2. For Potter and Phil -- Jain, 13:20:53 03/11/02 Mon

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