[mythtv-users] front end pixelation (Kris Jensen) (Gary Buhrmaster)

[Douglas Sargent]

>>Cooler is always better (well, as long as it is above
>>the dew point).  My recollection is that Ceton specified(*)
>>something like 65C as the limit, so in theory you
>>should be fine at 50C, but cooler is better.

>When you say some recordings, is there any
>consistency in the channels?  Or the time of day
>when the problems occur?  Or when it rains (yes,
>cable should be immune, but the "closed system"
>sometimes has leakage (water, and RF).

I put a small fan over the two cards, temperature dropped from 50C down to
30C, pixilation reduced dramatically. I still have the occasional glitch
but way less.

Pixelation occurs on most channels I am recording, as well any time of day,
both rainy and dry days (few in Seattle), on both tuners, so no pattern
there.  I think temp was the main culprit, even though I am well within
Ceton Parameters.


>Also, check the Ceton's signal levels and also the signal to noise levels.
>For reference, I see my cards are showing a signal level of 3.7 dBmV and a
>signal to noise level of 40.9 dB. I consider those numbers to be good and
>no pixelation to speak of.

>If your signal levels are to blame. Try and route the Ceton cards coax
>cable tru as few coax splitters as you can. If splitters are unavoidable,
>try to put the Ceton card on the first splitter.

Having Comcast tech coming in today to check the signal level. Will check
against your levels.

Thanks to everyone for the recomendations
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