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Analog modems use the telephone cable to send audio signals, which represent 1's and 0's over a connected phone line, using phone voltages.
Digital modems use a high frequency signal with the data superimposed on it. They can use the copper phone wires like an antenna. In this way there does not have to be phone connection in use. The phone can be used as well as the signal, if a filter is used to stop interference.
Digital modems can also use fibre optic or coaxial cables.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoActually i dont think so That modem chage the analog signalsinto digital signals!
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What are the advantages of digital data compared to analog data?
Digital data requires less bandwidth than analog data (e.g. new digital television broadcast compared to old analog broadcast), so more data can fit in the same frequency (e.g. DSL compared to analog modems). This is the primary advantage, although it is also generally stated that data is easier to recover and more tolerant towards interference.
Is sine wave used in analog or digital?
No and yes. Digital signals are usually square or pulse waves. By Fourier analysis, however, every periodic wave, even a square wave, is the summation of some series (often infinite) of sine waves.
Why phase modulation is used?
Actually phase modulation was used for the color signal in all analog TV systems.Phase modulation, with some signal preprocessing, was used to indirectly get frequency modulation in many FM transmitters.Certain modems use phase amplitude modulation.etc.
Why is frequency shift keying not suitable for high speed modems?
A conventional voice radio cannot transnit data directly. Data digital voltage levels must be converted to audio using a device called a modulator, whichapplies the audio to the transmitter. conversely,at the receiver,a demodulator converts audio back to digital voltage levels. RF-5000 radios=>(build in)Highspeed modems,,,,,, which have Modfulator and demodullator(which permit the radios to operate with either voice or data inputs) on the other side FSK(Frequency shift keying) only encoded binary data(0s and 1s)..... This case, Fsk is not suitable for high speed modems.............. Sandip Layek.
Does wireless city unlock phones?
no then there will be to many modems
How can you convert the digital to analog or analog to digital?
Buy a new digital ready tv, get a digital receiver Sky or Freeview for your analogue tv
What is an analog modem?
A analog modem is a typical modem found in personal computers. A digital modem is similar to a DSL type modem. Most computers do not have digital modems.
How could a digital signal from outer space be picked-up?
Radio "signals" are always analog, not digital. To send a digital signal, it must be converted to analog format, and then the received signal has to be re-converted to digital. So the Voyager and Viking space probes, for example, include a digital-to-analog converter attached to the radio transmitter, and the radio receivers here on Earth are routed through an analog-to-digital converter to make sense of them. You yourself may have such an "analog-to-digital" converter; they are called "modems", or "modulator/demodulator".
How broadband modem blocks atacks?
broadband modems do not block network attacks a modems job is to convert analog signal or digital signal into a signal the computer can use a firewall would be used to block network attacks
What are the advantages of digital data compared to analog data?
Digital data requires less bandwidth than analog data (e.g. new digital television broadcast compared to old analog broadcast), so more data can fit in the same frequency (e.g. DSL compared to analog modems). This is the primary advantage, although it is also generally stated that data is easier to recover and more tolerant towards interference.
Performs both analog to binary and binary to analog conversion of information?
MODEMs do this function.
Is a modern an output device?
A "modem" is considered a transceiver. It receives data, and sends data. But it also converts signals in the sense that it can be seen as a DAC (digital to analog converter) and a ADC (analog to digital converter). Most dialup, DSL, and cable modems are examples of that - they plug into your computer and converts from-and-to your ISP the data you're receiving and sending. The signals you send from your computer are typically digital and the modem converts them into analog ones.
What does digital data mean?
A digital signal is a physical signal that is a representation of a sequence of discrete values (a quantified discrete-time signal), for example of an arbitrary bit stream, or of a digitized (sampled and analog-to-digital converted) analog signal. The term digital signal can refer to either of the following:any continuous-time waveform signal used in digital communication, representing a bit stream or other sequence of discrete valuesa pulse train signal that switches between a discrete number of voltage levels or levels of light intensity, also known as a line coded signal or baseband transmission, for example a signal found in digital electronics or in serial communications, or a pulse code modulation (PCM) representation of a digitized analog signal.A signal that is generated by means of a digital modulation method (digital passband transmission), to be transferred between modems, is in the first case considered as a digital signal, and in the second case as converted to an analog signal.
Is sine wave used in analog or digital?
No and yes. Digital signals are usually square or pulse waves. By Fourier analysis, however, every periodic wave, even a square wave, is the summation of some series (often infinite) of sine waves.
What is the price of Qwest Modem?
Modem actually stands for modulator-demodulator. Modems allow computers to communicate. They convert digital signals from computers to analog signals that can be carried by telephone systems. Prices of Qwest modems vary by model. The Actiontec M1000 DSL retails for approximately $100.
What is The definition of the word modem?
The word modem is a condensation of the two words modulate and demodulate. In the day of dial up, it takes the incoming analog telephone signal and modulates it into digital binary a computer can read. Out going it does the opposite, taking the binary digital computer code back into analog and out over the wire. Of course today, we have cable modems and wireless broadband.
Is a modems input or output?
MODEM Stands for MOdulator DEModulator. It acts both as an input & output (SIGNAL) as it converts incoming analog signals to digital and viceversa. Incoming - while downloading. Outgoing - while uploading.
