[linux-dvb] Re: [vdr] Re: dxr3/vdr problem

[Malcolm Caldwell <malcolm.caldwell@ntu.edu.au>]

On Thu, 2003-03-06 at 20:53, Holger Waechtler wrote:
> Malcolm Caldwell wrote:
> > 
> >>>It understand it is related
> >>>to BER but how?  
> >>
> >>Block Errors - or better Uncorrected Block Error Count - is the number 
> >>of MPEG packets that have not been corrected by the forward error 
> >>correction unit. These get visible as real artifacts in video or audio.
> > 
> > 
> > If I understand correctly my hardware (budget card) can't report the
> > Block errors at the same time as the bit error rate.  Does this mean
> > that the packets in the TS are not maked with the
> > transport_error_indicator bit as mentioned by Johannas?  Or is this bit
> > worked out some other way?  (I will try to look at the driver later)
> 
> no, the transport_error_indicator bit should always get set for 
> uncorrectable packets.
> 
> 
> >>In some setups the RF emissions or instable power supplies of your PC 
> >>might cause problems,
> > 
> > 
> > Do these power supply problems appear any other way?  I would I know if
> > this was the problem?  Are budget cards susceptible to this kind of
> > problem? The reason I ask is it would appear that the card can't power
> > my lnb - it works when I connect through my stand alone receiver's
> > loop-back connector - but if I turn off the receiver or connect directly
> > I have problems.
> 
> Try to borrow + install a stronger power supply and see if this helps...

OK - I now have a 300W power supply and there is not much change. 
(Well, now my irman works again and thats a good thing ;) but no change
to the dvb behaviour).

Now, the errors I am getting could well be due to a mis-aligned dish. 
It is worth noting that my stand alone receiver is also having problems
since I plugged my budget card into its loop-back port.  I think that is
just a coincidence.  I was away when my card arrived and set it up as
soon as I could - it could be that my stand alone receiver/dish were in
fact not working well since some time when I was away.  We did have some
storms while I was away.

On the fault where without the receiver powered up I get no signal: 
Could it be that my budget card simply cannot power my LNB?  This is a
c-band LNB and so perhaps it has a high draw?

> Holger
> 



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