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OTA good enough for DTV?
Posted 09 October 2004 - 01:25 PM
Posted 09 October 2004 - 08:19 PM
IF by chance, we were talking about identical transmitters at the same location on similar frequencies, I suspect a fair amount of snow could be tolerated - IF the receiver was a good one.
DishDVR 921, B: 120B, F: F051, V: L211HECD-N@04-Dec-07, L212@05-Mar-01, L213@Apr-01, L215@Jun-29, L216@Jul-23, L218@Jul-28, L219@Aug-11, L270@Sep-14, L272@Oct-28, L273@Dec-08, L274@Mar-08, L275@Mar-23, L276HECD-N@06-Mar-31.
DP-Twin=110/119, DP Single=148, into a DP34, DP Dual=61.5, into DP21s to add 61.5
Posted 10 October 2004 - 12:14 AM
Moving to Broadcast forum.
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Posted 10 October 2004 - 05:45 AM
I guess I will have to wait until I get the DTV.
Which, by the way, this installer said they sell for $800 with installation (an extra $100 for the multiswitch I need, however, which seems reasonable). So I may be changing to DTV soon.
Problem is, if I can't bring in my local WB via OTA digitally, DTV doesn't have a WB for me. :-(
Posted 10 October 2004 - 07:24 AM
This is a good question; a question not easily answered. Digital is different than analog when it come to reception. The key with digital is simple. If there is a steady uninterrupted stream of digital signal, you will receive it. Digital needs a good signal for the steady uninterrupted stream of data otherwise, you would experience drop-outs and/or no reception. If you current signal is snowy, most likely you will not receive a digital signal. Snowy in analog would mean too much loss of data in digital. Signals above 50% on my 6000 and signals above 70%, on my 921 lock and remain. If you decide to go to OTA digital, you may need a fringe to deep fringe antenna with an amplifier (caution of Pre-Amps) to increase the db to the point that you get the digital signal. Hope this helps. Check out this web site to determine what antenna will work the best. http://www.antennawe...aw/Welcome.aspx
How snowy can my analog picture be and I still get a good DTV signal over the air? I don't have my HD box yet, so can't see if I'll get a good one.
Posted 10 October 2004 - 02:06 PM
Posted 10 October 2004 - 03:26 PM
If you have some nearby cell towers, microwave links, etc., they sometimes produce harmonics close to or on the same frequency range as the broadcast UHF signals. The harmonics will excite the pre-amp because the pre-amp is in a more direct path of the harmonics. If you experience signal loss of digital, it may be a result of this. There is no caution if you live far away from the interference sources. I have fallen victim to this phenomenon. I removed the pre-amp and used an amp closer to my receiver. I got better gain and a purer signal.
I have a deep fringe with a pre-amp. Why do you say "caution?"
Posted 19 October 2004 - 02:09 PM
How snowy can my analog picture be and I still get a good DTV signal over the air?
I hope you realize that the digital (DTV) signals are on a different frequency, usually UHF. The digital strength required may be less but many stations are not at full power and UHF is usually line of sight (LOS) only.