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Reason the Change Was Ordered Mainly to free up radio frequency spectrum. An analog picture uses 4.5 megahertz for the video and sound and a satellite transponder is …typically 8 Mhz. wide. With the new digital system, it's possible to transmit up to eight separate TV channels in the same bandwidth on the transponder using a system called, `multiplexing`.
Answer Feb 2009
Analog tv now uses mostly vhf-uhf frequencies for the standard network TV. UHF was added in the 60s for local urban TV signals with the addition of another tuner years ago. An…y ham radio operator who has played with VHF 2 meters, or uhf , 450 mhz up, knows that UHF has significantly reduced range and is reduced to mostly line of site reception. So guess what sports fans, rural users , with their shiny new converter boxes hooked up to vhf antennas are SCREWED!!! Unless you get an extended range UHF antenna , you will not get TV. You may not get digital TV either if you are too far from UHF digital transmission even with a new uhf "digital' antenna. So, this whole thing is going to cause CHAOS to many rural and other users. Real good planning guys! Million of Americans will have no TV.....!!!!! Stay tuned for the fun on Feb 17, 2009!!@!!! The following is a update. Actually, there is no such thing as a digital antenna, all antennas are the same but a better antenna is one with a amplifier built in and mounted on the antenna itself. This helps the HDTV receive a stronger signal. An exception would be if you can see the transmitting tower from you location, no amplifier is needed. Always buy the VHF/UHF antenna with highest gain you can mount.
NSTC is the old analog system of encoding over-the-air television used in the US. ASTC is the new digital system for over-the-air television.
I get a perfect picture on TV using an antenna. Can not get digital signal to come thru when using either a converter box or a new digital TV. I have following all the instruc…tions carefully and can get no signal for digital. The antenna is new and hooked up correctly. Get perfect analog pictures. Why can't I get a digital picture? DTV signals are for the most part weaker than the old analog signals. Your new antenna needs to be a high gain VHF/UHF type with a built in or add on amplifier at the antenna. Don't forget to use new coax cable between the antenna amp and the TV set. Be sure the antenna is pointed directly at the transmitters, many have been moved. Sometime a rotor is a great help if the transmitters are in different direction's. If you using splitters, etc, they might need to be replaced with ones that will pass UHF (900 MHz) signals.
Yes. Your TV band radio will no longer work. You would need to have a radio with a tuner capable of picking up the new digital TV format. I don't know of any such product …currently on the market. Digital radio (marketed under the name HD Radio) is a completely different technology.
To receive digital TV signals from all stations, it is important that your antenna be able to receive both VHF channels (channels 2-13) and UHF channels (channels 14-51)…. Some antennas only provide good reception of VHF or UHF channels, but not both. For example, indoor "rabbit ears" usually need to be augmented with an additional "wire loop" or "bowtie" antenna (see pictures below) in order to pick up signals on UHF channels. Consumers should be aware that even if they use a digital-to-analog converter box, they will still need to use an antenna to receive DTV signals. Many of the antennas currently being sold as "HDTV Antennas," perform best at receiving UHF signals; some of these models state that they provide reception of signals on channels 7-13 but actually perform less well receiving those channels. If you obtain one of these antennas, be sure it provides good reception of all the VHF channels as well as the UHF channels. The reception capabilities of TV antennas also vary considerably, so be sure to talk to retail consultants and look at information on the packaging and/or the Internet to make sure that any new antenna you may choose provides good reception of both VHF and UHF channels. In addition, if you use an indoor antenna and receive signals on VHF channels, you may need to use an antenna with amplification. To check for the DTV signals that are available at your location, use the DTV Reception Maps available at www.fcc.gov/mb/engineering/maps.
In digital there is a signal threshold below which dropout (pixelation) occurs. When an analogue signal degrades the picture just gets 'snowy'. However, digital reception whic…h is running alongside analogue is at quite a low level to prevent interference with the analogue channels and appears more susceptible to weather interference. When the analogue signals are turned off the digital signal is boosted to give maximum coverage and will deliver a better service all round.
It would not appear that digital television has changed the world, yet.
DTV reception is not as forgiving as analog reception was. A better, stronger signal is need in most cases.
Yes. You just need a VCR plugged into your TV. Having a digital converter box going to your TV has nothing to do with being able to use a VCR or DVD player.
Yes. A digital TV antenna will give you better reception as compared to an analog TV antenna. But, a cable box or satellite dish will give you even better reception than a dig…ital TV antenna.
Though the TV cannot be altered, a set top box can be purchased fairly cheaply, about £20.00 in the UK. If you watch broadcast television (by means of an antenna) rather than… using cable TV, you can convert your analog TV to digital by means of a digital converter box, which should be easily available in any electronics supply store.
The move to digital television broadcasting reflects the change in production, storage and viewing of television content. Digital transmission adds features that analog servic…es are unable to support and there is a flexibility in the use of transmission bandwidth that is also not possible with analog broadcasts. As far as the viewer is concerned, digital television broadcasts allow far more channels to be received and normally with better image quality than seen with analog.
Buy a new digital ready tv, get a digital receiver Sky or Freeview for your analogue tv
Digital TV offers a much higher resolution and hence a better picture quality than cable TV. Also as it is a digital signal it is possible to include much better quality audio….