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

[Kris Jensen]

On Tue, Jan 12, 2016 at 10:57 PM, Douglas Sargent <dbsargent at gmail.com>
wrote:

> Hi Kris,
>
>      yes two tuners are saying 50C, the others are hovering about 40C.
>
>      Plan A : I took the cover off the case to see if they cool down.
> Interesting enough temperature on the tuners spiked up to 53-54C probably
> because the fan on the top of the chasis was pulling air on them
>
>      Plan B: will get some fans tomorrow
>
> At what temperature should they run?
>
> thanks for your help
>
> Doug
>
>
>> From: Kris Jensen <kris.jensen.knj at gmail.com>
>> To: Discussion about MythTV <mythtv-users at mythtv.org>
>> Subject: Re: [mythtv-users] front end pixelation
>> On Mon, Jan 11, 2016 at 6:55 PM, Douglas Sargent <dbsargent at gmail.com>
>> wrote:
>>
>> > hi all,
>> >
>> >     I have 2 Ceton cards (4 & 6 tuner). On the front end on some
>> > recordings are perfect and then I get pixelations, Image will have large
>> > blocks and ghosts.  I look at the same recording on MythWeb and I also
>> get
>> > pixelation in the same part. Problem is on recordings on both cards.
>> >
>> >     Can someone please give me a hand to debug where the problem is.
>> >
>> >
>> >
>> Hi,
>>
>> What temperature are the Ceton cards running at?
>>
>> I betting that the temp is over 50 Celsius.
>>
>


Hi Doug,

With my cards, I have found that if the temperature is 50° or higher I'm
guaranteed to get pixelation. I have managed to keep my cards well cooled,
well under 45°C most of the time.

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.

Hope it helps.

Kris.

_______________________________________________

> mythtv-users mailing list
> ---------------------------------------------------------------
> http://wiki.mythtv.org/Mailing_List_etiquette

 -----------------------------------------------------------------

> MythTV Forums: https://forum.mythtv.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20160113/e1335541/attachment.html>