
blmiller at slingshot
Nov 16, 2009, 1:00 AM
Post #11 of 13
(2263 views)
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> On Mon, 16 Nov 2009 20:03:55 +1300, you wrote: > >>What I always understood the nova-t-500 to be: >> >>The original Nova-T-500 is a USB device. >>Two USB tuners & USB hub on PCI card. >> >>Simple cheap clever way to get dual tuners on one PCB. >> >>I read something on the web about a reason for going to two antenna >>inputs. >>Don't remember the details, but seems pointless & annoying as will have >>more >>loss with one antenna thru' splitter. >>Only benefit would be pointing the two UHF antenna in different >>directions. > > It is actually better to have two aerial inputs. If there is only one > input, then there has to be a splitter on the board, and they are > frequently of dubious quality. With separate inputs, you can feed > them both whatever quality signal you want, without having another 6? > dB of loss in the onboard splitter. In NZ, you need three DVB-T > tuners to be able to record all channels at the same time. So you > probably will have a three-way splitter with the third aerial feed > going to another card. With an onboard splitter, that third aerial > would have a higher signal level as it is not further split and the > signal to the two Nova-T tuners would be lower level. > The on-board splitter will not cause any excess loss. One single input correctly terminated, one LNA with gain to offset any splitting loss feeding two tuners. I would be more worried about the nasty cheap consumer market splitters. With two inputs people are going to join them together with a bit of wire, I would. You are right about needing the extra tuner to get three & another antenna does give you more signal. Better to have just one high gain antenna as big as necessary, TV aerials are a blot on the landscape & 91 element UHF ones are length > 2m. _______________________________________________ mythtvnz mailing list mythtvnz [at] lists http://lists.ourshack.com/mailman/listinfo/mythtvnz Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/
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