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Electronics Engineering

How is analog tv transmitted?

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Answered 2012-08-31 04:26:05

using two subcarriers and a main carrier signal

  • audio subcarrier is frequency modulated with audio
  • color subcarrier is phase modulated with chroma
  • main carrier is amplitude modulated with sum of video and modulated audio subcarrier & color subcarrier; then lower sideband is suppressed by a filter.
  • closed captions are serial ASCII encoded characters embedded in vertical blanking of video signal
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Related Questions

How is digital television transmitted?

Digital television is transmitted by using different frequencies from analog TV. The digital broadcast is sent on the previously used analog channel's frequency.

How are analog signals transmitted?

Analog signals are transmitted as electrical waves.

How are analog signals transmitted-?

Analog signals are transmitted using a continuous signal.

How information is transmitted?

by analog to digital,digital to analog signal

When were digital TVs first sold?

In the year 2000, the first digital TV's were sold. Before that, people relied on analog transmitted televisions for entertainment.

What is analog-TV?

Its a television with an analog tuner built in. It picks up analog signals.

Why you change your analog signal into digital?

Analog is changed in to digital so it can be transmitted easily.

How does satellite tv work?

to be able for the satellite tv to work you need the following equipments:satellite dishreceivertvsatellite dish gets the satellite analog signals from the satellites outside the world and is transmitted to the receiver. the receiver then converts this analog signals to digital signals then it is displayed to your tv.

How is FM transmitted?

the digital signal is converted to analog signal after using by transmitted antenna

Is data is transmitted in the form of digital or analog?

both but for analog usually a frequency Carrier is required

Why scanning is necessary in tv transmission?

scanning is done to sample the image as digital information is more easy to be transmitted than the analog information...

What is digital and analog?

Analog TV:Analog (or analogue) television encodes television picture and sound information and transmits it as an analog signal: one in which the message conveyed by the broadcast signal is a function of deliberate variations in the amplitude and/or frequency of the signal. All systems preceding digital television, such as NTSC, PAL or SECAM are analog television systems. Digital TV:Digital television (DTV) is the sending and receiving of moving images and sound by discrete (digital) signals, in contrast to the analog signals used by analog TV.

What are the advantages of digital system over an analog system?

The advantage of the digital system over the analog system is that the signals are transmitted without degradation unlike the analog systems.

When did analog tv start?

The fist analog TVs were developed in the 1950s. In most countries of the world today, analog signals have been discontinued.

What is analog TV?

Analog television was first used in the 1930s. Analog signals are sent by varying voltage, radio frequencies, and static images.

When did it become a law to have an analog box?

It's not exactly a law to have a digital to analog converter box but they are needed to be able to watch television if you don't have a television with a digital receiver. Both the US and UK are going through a changeover from analog television broadcasts to digital broadcasts. In the US, major television channels had to be transmitted as a digital signal and their analog transmitters turned off in 2009. Smaller stations and community channels have more time to switch over. In the UK, all analog transmitters will be turned off by 2012. In both cases, once the analog transmitter is turned off, the only way to receive television channels is to use a digital receiver, sometimes referred to as an anlog box. The receiver changes the digital signal into a form that older analog televisions can display. The boxes mean that older televisions can still be used. All new televisions have a digital receiver built in so a separate box isn't needed.

How did analog cellular systems work?

An analog cellular system transmitted a caller's voice by converting the sound waves into a wave pattern

What is an analog TV tuner?

An analog TV tuner is a hardware device which enables analog TV signals (from an antenna or VCR or some other device) to be recorded, processed or viewed on a computer system.

Can you use set top box for analog tv?

Yes. If you are referring to a digital to analog converter box as a set top box. You can use that with your analog tv but you will still need an antenna. Your antenna gets the digital signal which is switched to analog via the box and is then able to be displayed by your analog tv.

How do you get analog channels on your rca television?

To get analog channels on an RCA Television a analog converter box needs to be purchased. Most local electronic retailers carry these devices.

What is the difference between analog and digital television?

Analog televisions receive an "analog" signal. If you were to look at an analog signal on a spectrum analyzer, it would appear much larger than a digital signal.

Can I convert an analog TV to a digital TV?

You cannot convert an television from analog to digital however, they do have converters that can connect to the analog televisions which allows the user to watch digital television. These converters are available at places like Wal-Mart or can be ordered from an online source such as Amazon.

How do you convert the analog signal from your rfoutput on your sky box to be received on your digital only tv?

Almost all modern televisions still support analog RF signals. The input selection will usually be marked as "ATV" or "Analog Television". Alternatives are to use the analog video output form the Sky receiver. Again, almost all televisions have a number of analog video inputs. If the television only has HDMI inputs, then the final option is to use an analog to HDMI converter. They are available from video and television specialists and will deliver an HDMI signal to the television,

What were the sizes of analog TVs?

Analog televisions have been made in all sizes from 3 inches up to 37 inches and beyond. There is at least one model of 42 inch plasma television that was purely analog. Today, analog only televisions are increasingly hard to find and will not be made for very much longer.

How do satellites and TV signals work?

Satellite TV Providers transmits the signals through their satellite dish converting it first from digital signals to analog signals. These signals which were converted will be transmitted to the satellite. The satellite will then transmit the analog signals per request of the satellite dish connected to the receiver of the subscriber. Once signals are received, it will be converted back to digital signals which can be read by the receiver and be displayed to the television.

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