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| 1 | |
ASK, PSK, FSK, and QAM are examples of ________ conversion. |
| | A) | digital-to-digital |
| | B) | digital-to-analog |
| | C) | analog-to-analog |
| | D) | analog-to-digital |
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| 2 | |
AM, FM, and PM are examples of ________ conversion. |
| | A) | digital-to-digital |
| | B) | digital-to-analog |
| | C) | analog-to-analog |
| | D) | analog-to-digital |
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| 3 | |
In QAM, both ________ of a carrier frequency are varied. |
| | A) | frequency and amplitude |
| | B) | phase and frequency |
| | C) | amplitude and phase |
| | D) | None of the choices are correct |
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| 4 | |
In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant. |
| | A) | ASK |
| | B) | PSK |
| | C) | FSK |
| | D) | QAM |
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| 5 | |
In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant. |
| | A) | ASK |
| | B) | PSK |
| | C) | FSK |
| | D) | QAM |
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| 6 | |
In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant. |
| | A) | ASK |
| | B) | PSK |
| | C) | FSK |
| | D) | QAM |
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| 7 | |
Quadrature amplitude modulation (QAM) is a combination of ___________. |
| | A) | ASK and FSK |
| | B) | ASK and PSK |
| | C) | PSK and FSK |
| | D) | None of the choices are correct |
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| 8 | |
________ uses two carriers, one in-phase and the other quadrature. |
| | A) | ASK |
| | B) | PSK |
| | C) | FSK |
| | D) | QAM |
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| 9 | |
How many carrier frequencies are used in BASK? |
| | A) | 1 |
| | B) | 2 |
| | C) | 3 |
| | D) | None of the choices are correct |
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| 10 | |
How many carrier frequencies are used in BFSK? |
| | A) | 1 |
| | B) | 2 |
| | C) | 3 |
| | D) | None of the choices are correct |
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| 11 | |
How many carrier frequencies are used in BPSK? |
| | A) | 1 |
| | B) | 2 |
| | C) | 3 |
| | D) | None of the choices are correct |
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| 12 | |
Which of the following is not an analog-to-analog conversion? |
| | A) | AM |
| | B) | PM |
| | C) | FM |
| | D) | QAM |
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| 13 | |
In _____ transmission, the carrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal. |
| | A) | AM |
| | B) | PM |
| | C) | FM |
| | D) | None of the choices are correct |
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| 14 | |
In the analog transmission of the digital signal, the baud rate is ___________ the bit rate. |
| | A) | always less than |
| | B) | less than or equal to |
| | C) | always greater than |
| | D) | is greater than or equal to |
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| 15 | |
In ASK, the bandwidth is ________. |
| | A) | less than the signal rate |
| | B) | equal or greater than signal rate |
| | C) | always equal to signal rate |
| | D) | five times the signal rate |
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| 16 | |
With the same signal rate, the bandwidth of FSK is normally ___________ the bandwidth for ASK. |
| | A) | greater than |
| | B) | less than |
| | C) | equal to |
| | D) | None of the choices are correct |
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| 17 | |
The bandwidth of an AM signal is ______________ the bandwidth of the original analog signal. |
| | A) | equal to |
| | B) | two times |
| | C) | three times |
| | D) | None of the choices are correct |
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| 18 | |
In AM radio, the allocated bandwidth for each station is ___________ kHz. |
| | A) | 15 |
| | B) | 20 |
| | C) | 10 |
| | D) | None of the choices are correct |
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| 19 | |
In FM radio, the allocated bandwidth for each station is ___________ kHz. |
| | A) | 100 |
| | B) | 200 |
| | C) | 300 |
| | D) | None of the choices are correct |
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