VoyForums
[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

[ Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, 3, 4, 5, 6, 7, 8, [9], 10 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 23:25:21 01/19/02 Sat
Author: lcs
Subject: Re: Potter - strange Pal System
In reply to: Potter 's message, "Re: Potter - strange Pal System" on 00:36:15 01/18/02 Fri

The board manages to lock but loses it
all the time. I found a way to get the
Vsync pulse using the Hsync, but guess
what, they supress it before line 23.
Some channels have some Vsync pulses and
others don't, so i'm beginnig to think
the clue here must be the audio subcarrier.

You're probably right when you say the
data pack is not on line 18 either,
so I'm trying other code versions.
It's been a lot of guessing without the cro.
Maybe I'll just have to give up, but not
without a fight.

Thanks, man.

lcs




>Is the Vsync completely missing or just
>suppressed/inverted?
>If its completely gone the box must get a replacement
>from somewhere - some systems use a subcarrier on the
>audio to carry the sync pulses. If a 3chip can get a
>lock on the signal at all it means there is a
>signature pulse at the end of the vsync (ped-ned-ped
>with acceptable timing) and most likely a telltale
>sign at the start to work with for which you'll need a
>cro to identify what you have to work with. The data
>packet may not be on line 18 - again a cro will help
>find it as well as eliminate the possibility of
>occasional split-syncs. You could think they're
>deliberately trying to make it difficult!

[ Next Thread | Previous Thread | Next Message | Previous Message ]
[ Contact Forum Admin ]

Forum timezone: GMT-8
VF Version: 3.00b, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.