[ivtv-users] hvr-1600, frame CRC mismatch - incomplete frame

[Kyle Lil]

> Date: Thu, 4 Mar 2010 19:16:37 -0500
> From: dheitmueller at kernellabs.com
> To: ivtv-users at ivtvdriver.org
> Subject: Re: [ivtv-users] hvr-1600, frame CRC mismatch - incomplete frame
> 
> On Thu, Mar 4, 2010 at 7:11 PM, Kyle Lil <kpl388 at msn.com> wrote:
> > Thanks, Devin. Using the conversion factor you previously gave me for azap
> > output to decibels, it looks like the Windows utility is reporting the same
> > SNR. I'm trying to figure out if the glitches I'm seeing while watching
> > video in Linux (but not in Windows) are caused by differences in the
> > HVR-1600 driver or if the Windows codecs are particularly good at dealing
> > with errors. Based on what the Windows utility is reporting, it seems that
> > there are actually fewer uncorrectable errors at the tuner, which (I think)
> > points to a difference in the drivers...
> 
> The SNR count should be *about* the same +/- 0.2 dB.
> 
> Is this ATSC or ClearQAM?
> 
> Devin
> 
> -- 
> Devin J. Heitmueller - Kernel Labs
> http://www.kernellabs.com
> 
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I just wanted to give a quick update in case anyone else is experiencing the same problem as me. I was able to reduce my glitch rate from about 2 per minute to approximately one every twenty minutes by changing the .qam_gain parameter in cx18_dvb.c from 0x02 to 0x01. Does anyone know what this does physically? Does this offer any insight as to what could be done to eliminate the remaining errors?

Best, 
Kyle






 		 	   		  
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