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Question

A method for representing digital data analog signals by changing the phase of the analog carrier to represent the digital information is known as.

A
PIA
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B
PSK
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C
PM
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D
FM
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E
None of the above
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Solution

The correct option is B PSK

A method for representing digital data analog signals by changing the phase of the analog carrier to represent the digital information is known as PSK.

Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave). The modulation is accomplished by varying the sine and cosine inputs at a precise time.

Short for Wi-Fi Protected Access 2 - Pre-Shared Key, and also called WPA or WPA2 Personal, it is a method of securing your network using WPA2 with the use of the optional Pre-Shared Key (PSK) authentication, which was designed for home users without an enterprise authentication server.

Short for phase-shift keying, a modulation technique used by modems in which different phase angles in the carrier signal are used to represent the binary states of 0 and 1. The simplest method of PSK, also called biphase modulation, uses two signal phases - 0 degrees and 180 degrees.


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