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How far does a digital tv signal travel from a tower?
That truthfully depends on the transmitter's transmitting power, height of the transmitting antenna and the terrain.
Why use digital circuit?
Digital circuits are used most extensively when compared to its opponent ,its none other than analog circuits.Generally we consider a device or circuit in the sense we use widely use by considering different characteristics like speed,accuracy,efficiency,mechanical strength,environmental conditions,errors,noise,performance in different aspects,cost etc. When we consider an analog circuit, it consumes large power for transmitting any signal.We have different types of transmissions even in analog which consumes power in different ranges.We say a digital circuit is better when we take power(consumption) into account. The probability of error is also less because we have only two states that is either 0 or 1 , for any information we transmit the combination of 0's and 1's by using proper sampling techniques i.e; the sampling frequency should be twice of the message signal frequency(max). In equation fs =2f ; fs=sampling frequency; f= maximum operating frequency of message signal. When we consider analog the signal is continuous and while transmitting we have more chances for error occurence.So we prefer a digital circuit. One more factor is noise.The source of noise is less in digital circuits and signal to noise ratio is also good in digital circuits.Accuracy is the main performance characteristic to say that digital circuits are more advantageous. The above are some of the comparitives to say that digital circuits are widely preferred.
Is exponential signal an energy signal or power signal?
If the signal is not bounded by a step function, then an exponential signal is neither a power nor an energy signal. So the answer is neither.
What is data cable?
Just as electric cable transmits electric line power from the transmission center to receiving station so the data cable in digital communication transmits the encoded binary digits from a digital transmission system to a digital receiving system.
What is meant by parasitic capacitor?
Parasitic capacitance is the unwanted capacitance between: 1. A signal line and other signal line. 2. A signal line and earth. 3. A signal line and power supply line. Not that, I remember all (even most) of the effects, let me answer you with whatever I remember: 1. Unwanted coupling between two different signals, resulting in "crosstalk" between two signals. One signal interferes with other and other interferes with one. 2. attenuation / distortion of high frequency signals which have high impedance / limited current capability. 3. Ringing (unwanted oscillations) rising edge and falling edge of the signals rectangular / square wave.
Is analog signal has power?
all signals have power, analog or digital
What is power signal and what is energy signal?
Those signals which have finite energy and zero power known as energy signal..Those signals which have infinite energy and finite power known as power signal..
Comparison between ADC and DAC?
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 to be able to work with it. This is what you do when you record sounds or music. Sound is an analog signal and had to be converted with an ADC to a digital signal before it can be used in a compter or stored on a CD. A DAC, or digital to analog decoder is the oposite of the ADC. Here the digital signal is converted into an analog signal. This is what happens when you play music from a CD-plate. On a CD there are a number of holes, which each translates as a 0 or 1. These are read with a laser beam which is reflected back into a receiver whenever the laserbeam hits a hole. This then counts as a 1. When the disk is spinning it produces a stream of 1s and 0s, which togerther form a binary string, such as 00010111011101. The DAC then converts this value into a analogue signal, such as 1.1V, which is then used to power your speaker and produce audible sound.
Define energy and power signal?
An energy signal has finite energy over a given time period, while a power signal has finite average power over the same time period. Energy signals are typically used in energy storage systems, while power signals are used to describe the rate of energy transfer.
Will a Canadian TV work on the power in France?
No. Canadian current is 115 volts 60 cycles, French is 230 volts 50 cycles. Also, Canadian televisions expect a NTSC analog signal or ATSC digital signal. France uses SECAM analog and DVB digital signals. So even if you could get power for the set, it wouldn't be able to view any French television signals.
What do you mean by analog signal and digital signal?
Digital signals have discrete encoded states that they switch between. They can only assume the defined encoded values. Errors can often be easily detected and sometimes corrected.Analog signals are continuous and change smoothly from one value to another, passing through all intermediate values. There is no way to identify errors.
How you can determine whether signal is power signal or energy signal?
A signal x(t) is called an energy signal , if the energy is finite and the power is zero.A signal x(t) is called an power signal , if the power is finite and the energy is infinite.
Can you have a radio signal underground?
Yes, you can however the distance that a signal may be travel depends on the power and frequency of the signal. For signals at the same power a lower frequency signal will travel further.
What is defined as any unwanted electrical signals that are induced onto power or signal lines?
An unwanted signal is noise.
Why the power of the spreading signal is reduced with respect to the original digital signal?
aatenuation due to long distance
What are the needs for conversion between analog and digital data?
We like to convert audio signals to a digital signal. First, as a digital signal, it can be moved around many times without degrading during transmission. Old vinyl records would eventually wear out and get scratched. Tapes would wear out and the signal would be degraded. Not so with an audio track that is digitized. The data string is easier to "protect" than the vulnerable records or tapes. It's not going to degrade or "wear out" from playing. Also, digital audio can be stored as a digital file in contemporary computer- or microprocessor-based storage systems. This kind of storage can suggest that it can be kept around indefinitely. Certainly since it's a digital data string, it can be stored a "long time" without fear of degradation of the media, like with records or tape. Another advantage of converting audio to a digital signal (and a biggie) is that as a digital signal, it can be processed to achieve almost limitless effects. The clever designs of digital signal processing software make these applications powerful manipulators of any audio that is pushed through them in the form of a data string. The end product is constrained by almost nothing but the creativity (and the skill at using the software) of the person sitting at the keyboard of the computer. Got links if you want them. They are to related articles posted by our friends at Wikipedia, where knowledge is free.
Why is a digital signal higher quality than an analog signal?
Digital signals allow error-correction to be encoded into the signal thus ensuring high-quality transmissions over a much greater distance than would be possible with analog transmissions. Digital signals have a much higher rate of transmission, with fibre optic providing the optimum transmission rate. Digital signals use less bandwidth, thus allowing a greater number of independent transmission channels over a given band of frequencies with no cross-talk between channels. Digital signals can interleave audio, video and data in the same signal. This is what makes it possible to access the internet through your telephone line and make voice calls at the same time. Digital signals are easier to encrypt.
