[pvrusb2] WinTV USB2/Tv-Viewer question

[Mike Isely]

Technically speaking the composite input actually uses *less* of the 
tuner than the RF input.  It's one less pipeline stage.  However there's 
nothing that controls power to the RF section so I would expect the 
power draw to be no different.

On the whole the mpeg encoder chip is probably drawing the majority of 
the power anyway, so any difference in whether or not the RF tuner is 
actually doing any work probably makes no difference at all.

If there's any difference at all, I would guess that a clean (i.e. no 
video noise) signal would probably present less work to the mpeg encoder 
and so might lower the power draw overall - which would suggest again 
that the composite input would be an improvement over RF since weak 
signals / interference / other sources of noise wouldn't get in the way.  
But that's really just a wild guess.

  -Mike


On Wed, 28 Aug 2013, Gary Buhrmaster wrote:

> On Wed, Aug 28, 2013 at 7:50 PM, Lorne Shantz <lorne_shantz at yahoo.com> wrote:
> > Hmmm... so you think it is drawing more power to pull the signal from the vcr machine? It is rock solid (it seems) when capturing TV signal, or watching tv.
> 
> Well, it really should not (be significantly different), but my first reaction
> to "flaky" is always to check the power (source).  It is an old habit
> from long ago lessons.
> 
> Gary
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-- 

Mike Isely
isely @ isely (dot) net
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