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: 04:34:55 01/27/03 Mon
Author: Potter
Subject: Re: New ideas & intermittent audio
In reply to: Pokey 's message, "New ideas & intermittent audio" on 19:40:27 01/21/03 Tue

Most modern VCRs/TVs will blue screen if they detect a 'bad' signal and this is hard to overcome in some.
Check the amplitude of the input signal - if it's something like 2V pk-pk you need the 75 ohm loading resistor on the input to get it within spec (about 1V from black to highest white level)
The code is very sensitive to the oscillator setting - slightest error means no lock at all.

>
>Is this circuit/code sensitive with respect to the
>oscillator? I thought that I might put in another
>variable cap along with a fixed cap all in series.
>This way I might get to fine tune the oscillator with
>smaller increments.
>
>Also, I've read that some people have added 75ohm pull
>down resistors at the in/outputs. Does the Canton3
>need this? Or does the circuit already have an Rin and
>Rout of 75ohms?
>
>Lastly, my vcr outputs a blue screen on weak channels.
> I've turned this off and it works great. I get a
>continuous picture but I've noticed that the audio
>cuts in and out. I don't see an option in the menu
>(similar to the blue screen) to change this. Anyone
>know if this is a vcr thing or the way the signal is
>scrambled? I wonder if I'm using the wrong code
>(rev7t1a).
>
>Pokey

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

Replies:

[ 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.