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Given an AM radio signal with a bandwidth of 10 KHz and the highest-frequency component at 705 KHz, what is the frequency of the carrier signal?
______ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data
Which of the following is not a digital-to-analog conversion?
In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant
In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant
In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant
A constellation diagram shows us the __________ of a signal element, particularly when we are using two carriers (one in-phase and one quadrature)
Quadrature amplitude modulation (QAM) is a combination of ___________
_______ uses two carriers, one in-phase and the other quadrature
________ conversion is the representation of analog information by an analog signal
Analog-to-analog conversion is needed if the available bandwidth is _______
Which of the following is not an analog-to-analog conversion?
In _____ transmission, the carrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal
In _____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal. The peak amplitude and phase of the carrier signal remain constant, but as the amplitude of the information signal changes, the frequency of the carrier
In _____ transmission, the phase of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal
In _______, the peak amplitude of one signal level is 0 the other is the same as the amplitude of the carrier frequency
How many carrier frequencies are used in BASK?
How many carrier frequencies are used in BFSK?
How many carrier frequencies are used in BPSK?
How many carrier frequencies are used in QPSK?
total questions: 237

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