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Old 28-Jan-2011, 11:06 AM   #1
jklinetobe
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Join Date: Jan 2011
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signal help

"http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%jklinetobe") I have a homemade db4 antenna I have 100 % signal but no snr(db) I do not really understand all this but quick to learn anyways. I have 5 channels with 77% signal but the snr is about 21 good picture.I am ok with that but I have 3 channels that have 100% but picture quality is really bad and the snr is 0 I do not know what to do to get it to come in any better thank you for all the help.
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Old 28-Jan-2011, 11:49 AM   #2
John Candle
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Tv Antennas and Reception

Read and understand this about Real Digital Tv Channels and Virtual Digital Tv Channels. And about Analog Tv Channels http://forum.tvfool.com/showthread.php?t=695 . Here is how to point a Tv antenna , http://www.kyes.com/antenna/pointing/pointing.html . Direct one side of the home made Tv antenna with out a reflector at 260 magnetic compass and the antenna will receive the stations at 266 magnetic compass and the Tv stations in the oppisite direction. . Here is a list of Nebraska Tv Channels , http://www.northpine.com/broadcast/ne/tv.html . This list shows the Virtual Channel as PSIP. The channels are listed as A/D = Analog or Digital. The RF list is the Real Channel that is transmitted. . Digital K50IO-D 50 is NET is NET Television is http://www.netnebraska.org/television

Last edited by John Candle; 29-Jan-2011 at 6:15 AM.
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Old 28-Jan-2011, 2:20 PM   #3
Dave Loudin
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Location: King George, VA
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You have two threads. Let's focus here.

First, please repost the link to your TVFool report. Use the URL exactly as it shows in your browser. The following is based on the image you posted...

All but one of your local signals are low-power stations that can broadcast original programming or retransmit a distant station. You can tell by the call sign listed Knnxx, where nn represents the channel the signal is broadcast on. Unlike full-power stations, low-power stations were not required to cease analog broadcasting in 2009, which is why analog signals are showing up in your report (the pink ones).

Thanks to issues with the FCC's database extracts, it's hard for sites like TVFool to keep track of the status of low-power stations accurately. That's why you see these stations listed twice (as digital and as analog) often. From what you're describing, I bet you are getting some in digital and some in analog.

Why? Again, just guessing since we don't know what you're using as a tuner, the channels where SNR is listed are digital, as that, or "signal quality" is something that most every digital TV tuner provides. The stations with a terrible picture and 0 SNR are likely analog, as you should be getting NO picture with a 0 SNR on a digital tuner. Can you tell us the channels that are working and those that are not?

As far as your homemade db4 goes, you should use a design that is documented here. Designs that feature 7" whiskers that you will find documented elsewhere are not optimum for the entire UHF band.
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Old 28-Jan-2011, 5:50 PM   #4
John Candle
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Tv Antennas and Reception

Analog Tv pictures have always had , ghosts , drifting lines , dots , snow , color shifting , static , impulse noise , fuzzyness and has been this way for 65 years. The new -- well it's not really 'new' but most people think it's new Digital Tv Pictures are C-L-E-A-R. Where have many people been for the past 65 years or so?? . http://forum.tvfool.com/showthread.php?t=1270

Last edited by John Candle; 28-Jan-2011 at 6:01 PM.
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