[pvrusb2] Two PVR USB2 unit initially tune PAL as black and white

[Mike Isely]

On Tue, 5 Jul 2011, Tom Warren wrote:

> Hi Mike,
> 
> Thanks for your comprehensive and informative response. My hardware is fine,
> and I am happy to report I have solved the problem. I hope this information
> may help to solve it for others.
> 
> When I initially set up the WinTV boxes, I used the 'scan' utility to obtain
> the channel frequencies. It turns out that most of the frequencies were
> wrong, and I believe I know why this happened. My local cable provider is
> using PAL B/G but it seems also places some programmes on other (D/K)
> frequencies adjacent to the official B/G ranges. I think this must have
> confused the utility and it chose the D/K channel spacing instead of B/G.
> 
> To solve the issue, I found some PAL B/G frequency charts via Google, erased
> all of the errant values and created new ones following the chart. I then
> went back and filled in the D/K frequencies (which are between the official
> bands) and now the channels tune perfectly.
> 
> Thanks again for your help, and I hope you'll check out Tvheadend because it
> really is an excellent back-end for both DVB and analogue feeds:
> lonelycoder.com/hts .
> 

Ah, so it was marginal tuning.  The tuner was doing exactly what it was 
told, but it was told the wrong values.  Interesting that NTSC isn't the 
only standard where this can happen.  Thank you for figuring this out 
and posting it here - so others can learn from this.

  -Mike


-- 

Mike Isely
isely @ isely (dot) net
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