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Re: [Discuss-gnuradio] using ADC of a TV-card with CX2388x chip or digit

From: zarquon
Subject: Re: [Discuss-gnuradio] using ADC of a TV-card with CX2388x chip or digital TV-reception chips/cards
Date: Mon, 24 Jan 2005 01:54:27 -0500
User-agent: Mutt/1.5.6i

On Mon, Jan 24, 2005 at 01:24:18AM +0100, Martin Dvh wrote:
> Hew How Chee wrote:
> The newer conexant CX2388x chips have similar descriptions in the 
> datasheets for the capture-modes.
> I found however a the following register description which might mean what 
> we want it to mean:
> CX23883_Datasheet.pdf:
> Capture Control Register 24 h310180
> Bits   Type   Default Name Description
> [6]    RW      0          CAP_RAW_ALL A value of 1 enables continuous raw 
> data mode capture.
> This might mean that we can capture without any gaps with this chip.
> As I don't own a TV-card with this capture chip (yet) I cannot say what 
> this mode really does but I am willing to try to modify the driver and 
> experiment.
> I anybody has a TV-card with this chip please let me know.
> Maybe we could cooperate to try to find out.

I've got the Leadtek card; it has a CX23882 chip. I run 2.6 and am
mildly familar with the driver.. I think my patch was the first one to
fix the tuner (typo in the tuner defs) and added it to the card
database. I haven't touched it much since, though. They've got the wrong
decimation values for NTSC but I didn't have my TV books handy and they
didn't believe me. (The VBI data lines are _outside_ the viewable area;
that's why there's a separate capture unit for them. address@hidden)

(Who doesn't think that watching the closed captioning flicker in the
window adds anything useful.)

> Leadtek Winfast 2000XP Expert

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