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About the Automation MCQ category
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0
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108
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February 15, 2021
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The datarate R of a digital communication system is about how ___
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0
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62
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July 29, 2021
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Which of the statement is correct?
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0
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141
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July 29, 2021
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Quadrature amplitude modulation (QAM) is a form of digital modulation where the digital information is ___
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0
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61
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July 29, 2021
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In Binary Phase Shift Keying (BPSK) modulation is carried out in how many possible phases?
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0
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39
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July 29, 2021
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The most common form of MFSK uses tones of 16 frequencies and is ___
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0
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53
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July 29, 2021
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MFSK (multiple frequency shift keying) was originally used by ___
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0
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55
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July 29, 2021
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MFSK (multiple frequency shift keying) is a signal modulation method in ___
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0
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58
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July 29, 2021
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Nowadays, Multiple Frequency Shift Keying is mainly used by ___
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0
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42
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July 29, 2021
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The way of representing a bit stream—changing the bit changes the sign of ___
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0
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49
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July 29, 2021
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In ___,the frequency of a constant amplitude carrier signal is switched between two values according to the two possible message states
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0
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42
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July 29, 2021
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___ represents a method of reducing the bandwidth required for the transmission of digital data
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0
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43
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July 29, 2021
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What causes interference between channels, because of which orthogonality is ___
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0
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54
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July 29, 2021
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The signal space of QASK consists of how many orthogonal ASK spaces?
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0
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43
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July 29, 2021
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The QASK modulator consists of two identical binary ASK modulators, driven by the same oscillator, but with ___
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0
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43
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July 29, 2021
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In QASK, how many identical carriers, shifted 90° with respect to each other, are modulated by two independent data streams, usually at the ___
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0
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46
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July 29, 2021
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The M-PSK Modulator Baseband block modulates using the ___
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0
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72
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July 29, 2021
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M-PSK modulation schemes do possess ___
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0
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39
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July 29, 2021
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The efficient design of an RF amplifier with a sufficient linear range has ___
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0
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54
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July 29, 2021
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In QPSK, the four angles are usually out of phase by ___
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0
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52
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July 29, 2021
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Transitions in the data cause the carrier to shift by ___
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0
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61
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July 29, 2021
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For a given bit-rate, what requires half the bandwidth of PSK and is widely used for this reason?
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0
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53
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July 29, 2021
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In the case of two possible phases shift the modulation will be ___
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0
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43
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July 29, 2021
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In PSK, For a 0, a 0 degrees phase sine wave is ___
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0
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65
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July 29, 2021
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Which of the below statements are correct?
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0
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76
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July 29, 2021
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Today the FSK technique is used in low rate asynchronous modems up to ___
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0
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43
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July 29, 2021
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What is the term used to describe an FSK signal whose carrier frequencies are separated by ___
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0
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44
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July 29, 2021
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Mathematically, the modulated wave y(t) can be shown as ___
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0
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52
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July 29, 2021
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FSK describes the modulation of a carrier (or two carriers) by using a different frequency for ___
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0
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48
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July 29, 2021
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In which technique the frequency of the carrier signal is changed according to the data?
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0
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48
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July 29, 2021
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