[mythtv-users] DVB-T card with high sensitivity
junk at giantblob.com
Sun Feb 4 00:46:11 UTC 2007
The distribution amp may be a bad idea - unless it's intended for
digital TV, it may not enough bandwidth or sufficiently linear response.
I find my marginal reception was made quite a bit better when I took my
distribution amp out of the cable run.
Matthew Harrison wrote:
> 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.
> Mike Choy wrote:
>> 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
>> 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.
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