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When an analog TV program broadcasts more than 40% of its signal in ''white'' (white background, white sky, white snow, etc.), I get audio distortion and static. It makes no difference what channel is being viewed. It occurs on various vcr/tv setups in my home. What is causing this distortion and how can you correct it? Thanks.

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You wont have to worry about that much longer since all major TV stations are going all digital June 12th

Posted on Jun 04, 2009

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What does RF CH mean?


What is the difference between a RF channel and a virtual channel? The RF channel is the channel that the TV station uses to broadcast its signal. Before the conversion to digital, TV stations were normally identified by their channel number, and most people knew that a particular network was on a specific TV channel. While analog broadcasting was being phased out and all TV stations were converting to digital broadcasting, it was necessary for the TV stations to continue to broadcast their analog signals on their original RF channels, and also broadcast their digital signals on a different RF channel. However, since the TV station used their broadcast channel as part of their identification, they wanted to keep using the same channel number. To allow this to happen, the new digital television broadcasting standards (ATSC) provided TV stations the ability to continue to use their original channel number and also tell the TV set to tune to the new RF broadcast channel when their virtual channel number was selected. The original channel number is called the virtual channel number, and it will be followed by a period and a second number (3.1, 7.1, etc.).
One of the benefits of converting to digital for the TV stations is that they now have the ability to transmit more than one program at the same time on the same RF channel. The number of additional channels they can broadcast is determined by the resolution of the program (SD vs. HD, text only, music only, etc.). The second number in their virtual channel number indicates that one of the additional programming sources from the same TV station is being viewed (10.2, 10.3, 10.4, etc.).
When selecting an antenna, it is important to understand the difference between the RF broadcast channel and the virtual channel. Antennas are designed to receive specific ranges of RF channels, and the antenna needs to be selected for the RF channel you wish to receive. TV stations broadcast in two broad frequency ranges, called VHF and UHF. RF channels 2 through 13 are considered VHF, and RF channels 14 through 51 are considered UHF. In order to pick up the channels, the antenna has to be designed for the correct frequency range. It is very common today to find that TV stations using virtual channels 2 through 13 are actually using RF broadcast channels in the UHF range. Although not as common, some TV stations using virtual channels 14 through 51 are actually transmitting in the VHF range. An antenna designed for only UHF channels will not work effectively for RF broadcast channels in the VHF range, and an antenna designed for only VHF channels will not work effectively for RF broadcast channels in the UHF range.

Apr 09, 2015 | Televison & Video

1 Answer

Do I need a digital converter box to recieve a digital broadcast with a Sharp LC-20SH4U TV?


Yes you need a digital converter box. Your model has an NTSC Analog Tuner. It doesn't have a Digital Tuner. This is why you need the converter box.


For example, many companies like Comcast or Time Warner or TCI etc used to broadcast Analog Signals through their wires. Now they have broadcasted only Digital Signals. This makes either your TV Obsolete as a Tuner or you have to get a digital converter so your Analog TV can receive the signal.

Depending on your service, it may be worth your while to get a TV with a digital Tuner.

Then again, it also depends on if you are connecting a box receiver to your TV. For example, if you have Directv or Dish, you would then use your standard Video/Audio or Composite Cables to transmit your signal OR your Out to TV Coaxial whichever works for your receiver. Some receivers have already built in converters . You should really consider all the factors to decide and determine it based on the type of service you have or want.

Mar 09, 2011 | Sharp LC-20SH4U 20 in. EDTV-Ready LCD...

1 Answer

I have hooked up cable to the RF connector but it will not show a picture. I also tried an anntenna and it does not pick up a picture either. All I get is snow. However, I had a VCR/DVD combo connected and...


This tv is analog tv,will not get today free air tv broadcasting signal.Today free air tv signal are all digital free air broadcasting tv signal now.Anolog tv must have a pay cables tv or satalites tv signals to get a picture on analog tv set.U want analog tv to get the free air digital tv broscasting signal.The analog tv,must have it broadcasting tv signal must go through a box call a Converter box to able to produced a Digital free air broadcasting signal for analog tv to get a digital broadcasting tv signal.

Nov 07, 2010 | RCA F27442 27" TV

1 Answer

HOW TO CONNECT SAMSUNG 40 LCD TV TO SAMSUNG SURROUND TZ215 THRUGH SKY + HD BOX.


you will need the following = HDMI LEAD
Optical Audio Lead
Red and White phono Lead

Sky HD Box > connect to Tv via HDMI Lead.

Sky HD box > Connect the optical Audio, and the Phono Leads To your Surrounds sound.

The reason I am wanting you to connect the phono's as well as the optical audio out. Not all programs are transmitted with Dolby D so you will need these for normal sound to come through your surround sound.

One last thing I would like you to check is the sound settings on your Hd box.

OLD PROGRAM GUIDE:
On your sky remote. Press SERVICES, 4, 2, then ensure that Dolby D is displayed if not highlight and using the blue button change this to Dolby D. then arrow down to save.

NEW PROGRAM GUIDE:
On your sky remote. Press SERVICES, 0, Arrow along to SOUND then arrow down and change this to DOLBY D Then press the GREEN button.

Hope this Helps you out. IF so please leave a thumbs up

Little Dish Fitter

Aug 26, 2009 | Samsung LE40B650T2 40 in. Full HD Crystal...

2 Answers

No signal


Call the station to see if they are testing their signal. Also check the signal strenght: turn to channel WGEM and usung the signal meter in the converter box check to see if you have a strong signal. If signal is week change the direction of the antenna or get a signal amplifier; especially if you live more than 10 miles from their broadcast tower.

Mar 19, 2009 | Insignia Digital-to-Analog Converter for...

2 Answers

Can't recorder digital broadcast


Hi,if your vcr is an analog machine then you will not get a signal.If you have a seperate digital box then you can connect this via a scart lead to av2 on the vcr.Best thing though is to buy a digital dvd recorder.hope this is of some help.jamie

Mar 02, 2009 | Zenith XBV443 DVD Player/VCR

1 Answer

No Signal on Lubbock, TX channel 11.1 but receive all others


When the Government decided to make all stations go digital, most places we're telling about the change over. But what they forgot to mention to the ones like you that you may have to change your outside antenna. They make antenna just for picking up digital signal. So you may have to change that also. be Sure and check the cable going from the ant. to back of the converter box is in good condition or may have a break somewhere that could cause more trouble. If you see any bad places on the cable you may want to replace it now when you do the antenna.
biigg53566

Feb 19, 2009 | Insignia Digital-to-Analog Converter for...

2 Answers

Can not get any chanels through the digital converter please help


make sure its set to antenna than have someone go up and turn while u seek the signal try a channel thats works good but not perfect than go from there. if not u have ur plugs backwords in the tv not the device.

Jan 04, 2009 | Insignia Digital-to-Analog Converter for...

1 Answer

How do I set my PT-44LCX65 up to receive broadcast HDTV signals.


You should use the auto-program function in the customer menu. It will prompt you to select which antenna input you wish to program and then ask if you are on cable or receiving signals via "air" or "broadcast" mode. Allow the TV to load all the channels. You may notice that the auto program mode may move along quickly during the addition of analog channels and that during the scanning of the digital channels that it may look like nothing is happening. Patience is a virtue here. Wait until it has completely scanned both analog and digital bands and you will recieve both versions of the station's signal. If, for example, you have a local channel 5, the digital version will be 5-1, and so on.

Good luck!

michtech

Dec 18, 2008 | Panasonic PT-44LCX65 Television

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