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Define constellation diagram and its role in analog transmission?
Wiki User
∙ 11y ago
A constellation diagram is a representation of a signal modulated by a digital modulation scheme such as quadrature amplitude modulation or phase-shift keying. It displays the signal as a two-dimensional scatter diagram in the complex plane at symbol sampling instants. In a more abstract sense, it represents the possible symbols that may be selected by a given modulation scheme as points in the complex plane. Measured constellation diagrams can be used to recognize the type of interference and distortion in a signal.
By: ISRAFIL CSE
Wiki User
∙ 11y ago
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What is the opposite of digital?
Analog (or analogue) is the opposite of digital. http://www.thefreedictionary.com/analog
What is meaning of MODEM?
According to Encyclopedia Britannica, Modem is an electronic device that converts digital data into analog (modulated-wave) signals suitable for transmission over analog telecommunications circuits (e.g., traditional phone lines) and demodulates received analog signals to recover the digital data transmitted. The "modulator/demodulator" thus makes it possible for existing communications channels to support a variety of digital communications, including e-mail, Internet access, and fax transmissions. An ordinary modem, operating over traditional phone lines, has a data transmission speed limit of about 56 kilobits per second. ISDN lines allow communications at over twice that rate, and cable modems and DSL lines have transmission rates of over a million bits per second.________________________________________________________________A modem ( from modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.
What are AD and DA?
AD is Analog to Digital conversion the use is to do digital measurements of analog voltages and currents, a computer soundcard is an AD converter that convert analog sound to digital sound so that it can be played on a computer, and DA is the opposite, digital to analog conversion, the digital sound on the computer is converted to analog sound to drive a speaker or headphone
What does the word analog mean?
it means time
What is the full form of DAC?
Digital to analog converter
Define analog signalADSL signaldigital signal?
These are all computer and technology terminology. Analog and digital signals are used for data transmission, and ADSL refers to an Asymmetric Digital Subscriber Line modem.
What is digital transmission of analog data?
it means that you digitize analog data for transmission . Like 2 computer that chatting .
Block diagram of analog computer define each block plz answer this question as soon as possible .i have to make an assignment on this topic i will appriciate if pictures added plz reply my question.pl?
i have no picture
Why digital transmission is preferred than analog transmission?
Faster responce.
Is data rate high in analog transmission?
No
What was before digital transmission?
Analog transmission came before digital ones
Which transmission is analog?
One with a continuous signal wave.
How modem is used for data transmission?
fax
How fast is transmission from analog to Digital?
Analogue to digital is a conversion process not a transmission process.
What are the advantages of analog?
Advantage of Analog Communication: 1)Transmission bandwidth required is less. 2)No need of synchronization.
Exampl for analog communication?
In Analog communication, the analog message signal modulates some high carrier frequency inside the transmitter to produce modulated signal.this modulated signal is then transmitted with the help of a transmitting antenna to travel through the transmission channel. At the receiver, this modulated signal is received and processed to recover the original message signal. Example: AM , FM radio transmission an TV transmission.
What was before digital?
Analog transmission came before digital ones
