[mythtv-users] mpeg2 playback quality captured with PVR-150

Michael T. Dean mtdean at thirdcontact.com
Sun Oct 7 15:57:39 UTC 2007


On 10/07/2007 09:52 AM, Brian Wood wrote:
> Michael T. Dean wrote:
>> Any hints on determining proper amplification levels when using
>> digital?  The signal monitor's % doesn't seem to change regardless of
>> the setting I use for the amplifier, so I'm looking for other ideas.
>>     
> Often the "signal level" is actually the BER (Bit Error Rate), which is
> more or less related to the signal level, especially if you are below
> threshold.
>
> If you have sufficient signal, increasing it will not usually change the
> BER, so what you are seeing makes sense.
>
> Also, some cards (HD-3000?) do not properly report the BER, and/or some
> drivers do not properly interpret it.
>   

I am using HD-3000's, so perhaps that explains its always showing around
60-70%.

>>  I
>> guess if nothing else I could try decreasing amplification and see if
>> that helps...  I'm just not a fan of the long, drawn-out trial and error
>> process (and, it seems that the issues only started occurring this
>> summer and are becoming less frequent as the fall approaches, so I'm
>> trying to fix it before it disappears for the winter so I'll be good
>> next year, too).
>>     
> Without a signal level meter you are shooting in the dark as far as
> levels, and trial and error is about all you have.
>
> Level problems that start in the summer and get better in the autumn are
> often related to foliage growth along the signal path.

Hmmm.  Anyone know of a Napalm distributor.  ;)

Mike


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