> Date: Tue, 16 Mar 2010 15:49:54 -0400
> From: [email protected]
> To: [email protected]
> Subject: Re: [ivtv-users] hvr-1600, frame CRC mismatch - incomplete frame
>
> On Tue, Mar 16, 2010 at 2:46 PM, Kyle Lil <[email protected]> wrote:
> > With cables/splitter arranged in a configuration to give the HVR-1600 a
> > stronger signal I see an improvement in SNR from ~0x146 to ~0x14a when I
> > change qam_gain from 0x02 to 0x01. Rearranging connections to provide the
> > HVR-1600 a weaker signal, I see a similar improvement from 0x13c to 0x140
> > when changing from 0x02 to 0x01. In both cases the SNR appears stable, never
> > changing by more that 0x002.
>
> That's good info, but is the error rate consistent on both a strong
> and weak signal?
>
> Devin
>
> --
> Devin J. Heitmueller - Kernel Labs
> http://www.kernellabs.com
>
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Interesting. It looks like the error rate is ~1 per 25 minutes with qam_gain
set to 0x01 and the weak SNR (0x140). With the qam_gain set to 0x02 and the
weak SNR (0x13c), the error rate is back to ~2 per minute. So it seems that the
error rate is more related to the qam_gain setting than the SNR. I was actually
just taking a shot in the dark by changing this parameter. Could you tell me
what it actually does? Is this related to AGC gain somehow?
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