Television and Video

Why would it take hours for an analog television to display a picture after it is switched on?


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2005-11-30 20:42:48
2005-11-30 20:42:48

If it is a very old TV, more than likely it contains vacuum tubes that have gone bad. Vacuum tubes work by deflecting electrons inside a glass tube. This requires the tubes to be heated, with a small internal heater. The tubes have to warm up for them to work. This process should only take a minute or two. If it is taking hours the heaters are bad, or they arn't getting enough power to warm the tubes properly.


Related Questions

A Digital Television (DTV) Converter Box is an electronic device that converts the new free over-the-air digital signal into an analog signal viewable on older "analog" television set. The digital to analog converter box connects your antenna or rabbit ears to your TV set. It will allow you to continue watching TV after February 17, 2009, the day the transition to "all digital" takes place. A digital to analog converter box will not give you a digital picture on an analog TV set. Analog TV sets using the set top boxes will show digital broadcasts, but not in the full picture quality of digital TV. However, your picture will be better than it was with the old analog signal. Technically speaking about picture quality: The reason the picture quality won't be as good on an analog TV set is because of the display resolution. Analog TV screens aren't designed to display the same level of picture quality and resolution that is found in the digital TV signal.

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.

A; An analog oscilloscope will display a signal to a CRT the same principle as a TV can display movies

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.


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

It depends on your monitor. The big old CRT monitors are analog. The computer sends digital information to the monitor but it then gets turned into analog so the monitor can display that information. The LCD monitors are digital. The computer sends digital information to the monitor which it can display because it is digital.

An analog meter uses an analog display - a needle that physically moves around. A digital meter will have an LCD display.

6 Megacycles in analog. This includes picture, sound and guard bands.

Analog multimeters use a microammeter with a moving pointer to display readings

It is not possible to convert an analog television to a digital television. However, by using a digital set top receiver, it is possible to receive digital signals and deliver them as an analog signal to an analog television. Digital receivers are not expensive, starting at around $25 in US and ยฃ20 in the UK. They will allow all terrestrial channels to be received in the same way that a digital television will. Cable and satellite receivers can also receive digital signals and will provide an analog output that can be used with older televisions. With these options, there is no need to replace analog televisions right away. Remember that analog only televisions will not be HD so don't expect a sudden increase in picture quality when the digital receivers are used.

it isn't, digital tv may seem better and bigger, but with annalog tv's the pixel resolution and picture quality is better.

Because it had so many more advantages than than analogue radio and tv. It has better sound quality, less interference...

Analog connection to the Public Switched Telephone Network.

Many reasons, but the simple answer is that it allows pay TV providers to offer more channels with better picture quality than analog.

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

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

Broadcast TV stations in the U.S. have switched from analog to digital transmissions. This Fact Sheet provides information on TV antennas and tips for obtaining good quality reception of digital broadcasts.

It is not illegal not to switch. It's just if everybody else are switched to digital, you don't have anything to watch. Basically it used to be analog signal masts were sending out to your TV, nowadays it's (mainly) digital as it guarantees better quality. Soon you'll don't get analog signal anymore, so to watch TV you have to be digital.

K. D. Cross has written: 'JANAIR vertical contact analog display evaluation program' -- subject(s): Display devices, Aircraft instruments, Vertical contact analog display

A digital meter shows the measurement in numbers (123. . .), an analog display has a needle (like a speedometer needle) that points to the value on a scale marked in units (like a ruler.)

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.

Analog cable, or "regular" cable versus Digital cable, the difference can be seen when you put two televisions side by side with one using analog cable and one using digital cable. Through this, you will see that digital cable television picture quality is much better in comparison to the analog cable. To put it simply, digital cable provides a better picture.

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.

Color TVs have a limited color range. Even digital TVs can look brilliant to the naked eye, but do not prominently display all features. Non-color TVs, however, are clearer and typically use analog.

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