3-H-059: Pulse Modulation
3-59H1:
What is an important factor in pulse-code modulation using time-division multiplex?
Synchronization of transmit and receive clock pulse rates.
Frequency separation.
Overmodulation and undermodulation.
Slight variations in power supply voltage.
3-59H2:
In a pulse-width modulation system, what parameter does the modulating signal vary?
Pulse duration.
Pulse frequency.
Pulse amplitude.
Pulse intensity.
3-59H3:
What is the name of the type of modulation in which the modulating signal varies the duration of the transmitted pulse?
Pulse-width modulation.
Amplitude modulation.
Frequency modulation.
Pulse-height modulation.
3-59H4:
Which of the following best describes a pulse modulation system?
The peak transmitter power is normally much greater than the average power.
Pulse modulation is sometimes used in SSB voice transmitters.
The average power is normally only slightly below the peak power.
The peak power is normally twice as high as the average power.
3-59H5:
In a pulse-position modulation system, what parameter does the modulating signal vary?
The time at which each pulse occurs.
The number of pulses per second.
Both the frequency and amplitude of the pulses.
The duration of the pulses.
3-59H6:
What is one way that voice is transmitted in a pulse-width modulation system?
A standard pulse is varied in duration by an amount depending on the voice waveform at that instant.
A standard pulse is varied in amplitude by an amount depending on the voice waveform at that instant.
The position of a standard pulse is varied by an amount depending on the voice waveform at that instant.
The number of standard pulses per second varies depending on the voice waveform at that instant.
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