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| Dvico Tuner Cards - Technical Specs http://forums.linhes.org/viewtopic.php?f=2&t=16313 |
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| Author: | soundoff [ Mon Sep 03, 2007 8:14 pm ] |
| Post subject: | Dvico Tuner Cards - Technical Specs |
I have always run DVICO tuners and think they are excellent. I have been doing some research into the components used on their cards to see if the new "Pro" card will work with mythtv Note these are the DVB-T Versions of the cards available in Australia. DVICO Card, PCI Bridge Chip, Tuner, COFDM Demodulator Lite, CX23878A, Thomson 7579, Zarlink MT352 Plus, CX23881, Thomson 7579, Zarlink MT352 Home, CX23878A, Thomson 7579, ??????????? Pro, CX2388x, XCEIVE XC3028, ??????????? I currently run a "Lite" and a "Plus" card. I have always thought my "Plus" card had better sensitivity to weak siglnals, but after realising they have exactly the same tuner, I fail to see how this is possible. I think its possibly caused by the fact that the "Plus" card has the direct feed from my antenna, and the "Lite" card is looped out of the "Plus" card. If I used an amplified external splitter, I think I would see the same performance from both cards. Also interesting to note is that the new "Home" card is just the old "Lite" card with a new sticker on it. Knowing all this, I just bought another "Lite" card to tide me over until the "Pro" is properly supported. If anyone has more info on these cards, I would love to hear it. Search Terms: Fusion HDTV FusionHDTV DVB-T DVICO |
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| Author: | manicmike [ Mon Sep 03, 2007 8:40 pm ] |
| Post subject: | Re: Dvico Tuner Cards - Technical Specs |
Some people have told me that the plus is better with the DVB signals. It's reported in this forum, too. There's more electronics to the cards than just the tuner (yes, I've looked inside), and signal amplification and rf passthrough would be variables here. Otherwise all Zarlinks would be the same price (and they aren't). It's very easy for you to test this. Why don't you swap the antenna feeds for your cards and see what happens to the reported signal strength. The other thing I noticed that reported signal strength can vary immensely, while the actual signal is pretty much the same. Not sure of the technical reasons for this. Could be crap other components interfering with the signal to noise ratio, or just that it 'reports' the signal differently (although this seems really unlikely). Mike |
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