113.Q1.F

In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant.

• PSK

• ASK

• FSK

• QAM

How many carrier frequencies are used in BPSK?

• 0

• 1

• 2

• 3

AM and FM are examples of ________ conversion.

• analog-to-analog

• digital-to-digital

• analog-to-digital

• digital-to-analog

Analog-to-analog conversion is needed if the available bandwidth is _______.

• band-pass

• low-pass

• either of the two

• neither of the two

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 changes correspondingly.

• AM

• FM

• PM

• TM

Which of the following is not a digital-to-analog conversion?

• FSK

• ASK

• AM

• PSK

_______ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data.

• analog-to-analog

• digital-to-digital

• digital-to-analog

• analog-to-digital

Quadrature amplitude modulation (QAM) is a combination of ___________.

• PSK and FSK

• ASK and FSK

• ASK and PSK

• ASK and BASK

If the bit rate for a 16-QAM signal is 4000 bps, what is the baud rate?

• 1200

• 1000

• 400

• 300

The Federal Communications Commission (FCC) allows ______kHz for each AM station.

• 20

• 10

• 5

• 30