[mythtv-users] DVB-T card with high sensitivity

Dave Pearson lists at netsalve.com
Sun Feb 4 08:56:54 UTC 2007

Matthew Harrison wrote:
> Mike,
> I've already done all of those suggestions that I can do without 
> ladders. The lead from the aerial is an old analogue grade one, but I've 
> put a distribution amp on the wall where the wire comes in. The back end 
> sits just under that. There is probably 2 meters of wire from the aerial 
> to the amp and half a meter from the amp to the backend.
> I would be surprised if the capabilities of DVB cards have not improved 
> in the years since my card came out though. Perhaps sensitive was the 
> wrong word, perhaps discriminating would have been better. After all, a 
> better noise filter in the card's tuner should make a card better able 
> to pull the signal from the noise.
> Matt,
> Mike Choy wrote:
>> Matt
>> sadly this is not really an option for digital reception. A more
>> sensitive card is also more sensitive to noise. You dont change the
>> signal to noise ratio by having a better card. There really is no option
>> than to either get the aerial re-done, or more likely the cause of your
>> problem is the down lead, which is probably an analogue grade downlead.
>> Replace with digital quality cable will make a huge diff. If you cant do
>> this then think about a signal booster as close to the aeriel its self
>> (ie up in the loft) that way you are not also amplifying the noise that
>> the downlead picks up.
>> have a read of this for more info
>> http://www.megalithia.com/elect/aerialsite/dttcon.html
>> Kind regards
>> Mike C
>> Matthew Harrison wrote:
>>> I have a very old WinTV NOVA-T PCI card (version 1.2) which gets 
>>> marginal reception. By marginal, I mean some channels are perfect, some 
>>> break-up and some I can't get at all.
>>> As realigning my rooftop aerial would be expensive (either to get 
>>> someone round, or to buy ladders), I was wondering if anyone could 
>>> recommend a more sensitive card?
>>> This is for a backend machine in my loft, I could go for PCI or USB.
>>> My system is running Debian Etch with kernel  2.6.18-3-486.
>>> Thanks,
>>> Matt,
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I think you may be right, I have two DVB-T cards in my system, fed from 
the same Antenna. The Avermedia reports 95% signal strength, while the 
Twinhan only reports 32%. I would recommend the Avermedia PCI Card.


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