Do you use only UHF signal for digital TV?
No, VHS freq's are still used (channels 2 thru 13)
It is not 'necessary' in general, it is however necessary if you intend to use some digital equipment, which can only operate on digital signal directly, to use the analog signal.
If you use a roof top (outside) antenna, you might need an updated UHF/VHF antenna, aimed at the transmitter. Many stations changed tower locations when they switched to HD.
Digital data sent over UHF radio frequencies.
The signal directly from the sensor is analog. It is than converted to digital, and a digital signal is used for processing. The signal directly from the sensor is analog. It is than converted to digital, and a digital signal is used for processing.
You need a VHF/UHF antenna (channels 2 to 60 ). Check out: http://www.fcc.gov/cgb/consumerfacts/digitaltv.html
Digital TV signals are transmitted on VHF starting on channel 2 and ending at the top of the UHF spectrum channel 69. At one time the plan was not to use the VHF band but it didn't work out that way.
where an analog signal is to be converted into digital signal,because in some applications we need digital signal where we have analog signal that is we use an A/D converter
The answer to the questions depends on where you are. In the recent change to digital in the UK, many existing analog aerials work perfectly with the new service although others have had to be changed. Generally, in areas where the digital terrestrial service is using similar frequencies to the analog service and where there is good signal strength, the old aerial is likely to work. The results will vary between countries and even between… Read More
Unwanted Errors of precision when the analog signal is converted into a quantized, sampled digital signal. The same error arises when the digital signal is then converted into an analog signal for the plant to use.
it uses a digital
No, some electronic devices use analog signals as their input/output others may use digital signals as their input/output; some equipment uses an analog signal as the input and outputs a digital signal. Be sure to use the correct signal and signal strength otherwise you may damage your electronic device.
modem means modulator demodulator. it converts digital signal to analog signal. it is use to transmit computer signal (digital signal) over the telephone line to communicate to other computers. modem converts the computer digital signal into frequency (analog signal) so that it can transmit over the telephone line and at the receiving end the modem converts the analog signal back to digital for the receiving computer to understand it.
When you speak into a cellphone an analog to digital converter chip converts your voices sound waves into a digital signal. Then a digital signal processor compresses the digital signal. The compressed digital signal is then transmitted as a radio wave through the cellular network. The digital signal processor on the receiving end, decompresses the incoming message, an amplifier boosts the signal to make it loud. Then its passed to the speaker. The end............ DJ
The devices are known very simply as analog to digital converters and digital to analog converters. They are frequently shorted to A-D and D-A converters. A complete analog to digital converter will not only convert the analog signal into a set of numbers, it will also format the digital data ready to deliver to the next step in the signal chain. In television, this means generating a fairly complex stream of data that will carry… Read More
A video uses the analog signal
we have to do sampling in dsp because in dsp we have to convert all in analog signal in digital form so for converting into digital signal first we have to convert continuous tome signal into discrete time signal....so we use samplin in dsp...
A Digital Signal can have one of two values, 1 or 0. An Analogue signal can have any value between 1 and 0. Digital signals are better for sending information as if the signal is somewhat distorted, it is still easily recognisable. Vinyl Record use analogue. Cds use Digital
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 instructions 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… Read More
transducer convert one energy to other energy .now in analog transducer it convert energy use of analog signal and digital it converts use og digital signal
n Digital data, digital signal n Equipment less complex and expensive than digital-to-analog modulation equipment n Analog data, digital signal n Permits use of modern digital transmission and switching equipment n Digital data, analog signal n Some transmission media will only propagate analog signals n E.g., optical fiber and unguided media n Analog data, analog signal n Analog data in electrical form can be transmitted easily and cheaply
If I were you, I would try and use a so called 'Digital-Analog Converter' or shortly D/A converter. See wikipedia: http://en.wikipedia.org/wiki/Digital-to-analog_converter
The analog signal is continuous signal and analog monitor like picture tube type TV had been used . Digital signal is abinary signal and we use digital monitors those are light in weight , they might have bigger screen and lesss raiation affects.
An analog electronic system use a continuous variable signal. A digital system uses signals by bands of the same signal state.
An analog signal can change continuously over a wide range of values. A digital signal can only assume a limited number of discrete (fixed) values. The amplitude of an analog signal can be represented by a decimal number whereas the amplitude of a digital signal can be represented only by a binary number. For example, the output of an analog circuit could vary continuously between 0 volts and 5.0 volts while the output of a… Read More
Demultiplexers are used in digital electronics to get a signal at the input and produce so many at the output.
If its a very low frequency signal you might. A digital `signal` is still on and off voltages. If its too fast to see the meter changing then you need another method.
No - It can't be a Digital TV antenna - it's the wrong size, wrong shape. Most digital tv is UHF - it needs a little loop like from a coat hanger. Some digital tv is VHF - but you still can't use an old satellite dish. Not gonna happen.
A modem converts a digital signal into an analog signal. Allowing us to use a phone line as a transmission medium.
An ADC, or analog to digital decoder, is used to "translate" analog signals into digital signals. An analog signal can take on any value, such as 0.1V, 0.5V, 4.12V, 5V and so on. A digital signal on the other hand can either be "high" or "low", 1 or 0. A computer can only work with digital signals, and therefore you need to convert an analog signal into a digital signal in order for the computer… Read More
If your old tv has no built in ATSC Digital Tuner , then you need a digital to analog converter box. This box receives the ATSC Digital Signal and converts it to NTSC Analog , for Tv's that only have a NTSC Analog tuner.
they use frequencies in uhf range since animals dont make those sounds
digital services with analog services we use binary digits 0 and 1 for digital services we use electrical signal for analog service
My digital watch told me the time was 9:15 AM. The digital signal was weak, but could be amplified. Digital recordings can reproduce sounds more accurately, but can sound too mechanical.
There some or more reason as follows 1 There only tow voltage (current) levels high or low in digital system but there are infinite level of voltage(current) in analogue system. 2 Digital systems are extremely immune to noise as compare to analogue system. 3 Digital systems are very compact as compare to analogue system These are according to my knowledge or further there may be more reasons!!
It is a device that changes the digital signal from a computer into the analogue signal more suited to a phone line, and the analogue signal from phone line into the digital signal for the computer to use. These two processes are called modulation and demodulation. The word modem comes from these two words: MOdulation and DEModulaion = MO DEM.
Digital signal processors (DSPs)
Digital technology is not corrupted by noise, digital signal typically uses less bandwidth, digital signals can be encrypted,and they are less costly, easier to use, and easier to manipulate.
In terms of the history of the signal, it was the analog signal that came first. That doesn't mean that it can't still be used in conjunction with an analog signal in today's use.
filter DC power supplies block DC to allow measuring pure AC analog timing analog integrator analog differentiator digital signal speedup digital signal slowdown signal coupling between stages bypass RF tuning etc.
Why digital communications and what its advantages over analog communication ,first you have to know what is the difference between analog signal and digital signal. Analog signal analog signal is continuous time signal i.e. it has a value at any moment of time and it has infinite number of valus , such as dinusoidal signal ,you can substitute X with any value and you will have an value in Y in the follwing sin relation… Read More
Simulink provides a Simulink model for digital to analog converter. we can use such blocks or models for this purpose. You can use xPC target built in Simulink, but you will have buy a xPC card to install on your target computer and run it in host computer.
= Answer = Yes. Component cables can carry an HD signal. DVI and HDMI are the preferred ways to transfer an HD signal though because the signal is carried digitally across the cables as opposed to analoglly as with the component cables. = Answer = There are high definition analogue component interfaces around for HD televisions but they are not common. I believe that almost all new televisions will have only digital interfaces (HDMI or… Read More
If all your TV's are digital, you just need to use a digital signal splitter. The question is, will you have enough signal to share among three TV's. If the pictures look snowy or you can't get a decent pix on any of them, you might need to add an antenna amplifier.
The time it took to change analog television signals to all digital took about 25 years. It started around 1986 and many television stations had converted over to digital signal by the year 2010. Persons who owned analog televisions had to either buy a new digital television or use a converter box to get a clear signal.
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… Read More
You can if the local TV stations are not to far away, select a VHF/UHF antenna. If the stations are far away, mount the antenna as high as possible. Check with your neighbors that have antennas.
A: That is because is the language that a machine use and understand '1' '0' or true or false There is another possible state and that is don't care or 'x' but that is synonymous as who cares
Yes they work well. There are many types but all have the same basic operation of converting the analog video stream of VGA into a digital equivalent. There is a myth that HDMI is better than other signal formats. Be assured that this is absolutely not true. An HDMI signal generated from a VGA signal will not be any better than the original VGA signal. HDMI is simply a digital signal format and carries a… Read More
Both cables use a digital video signal, so as far as picture is concerned they will look identical. The difference is that HDMI also carries digital audio. In general HDMI is preferred to DVI in most setups because of this reason. It means one less cable to add to the cable mess. DVI = Digital Video HDMI = Digital Video + Audio HDMI also incorporates HDCP, or High Definition Content Protection, a signal sent along… Read More
it rely depends where you are. UHF stands for ultra high frequency and vhf stands for very high frequency. vhf has ben around longer than UHF making them cheaper to use but UHF means smaller antennas and better output. vhf is better in rural locations with expectations to be used in close proximity because buildings and natural barriers affect them. UHF can easily get through buildings and natural barriers but you pay lots more for… Read More