What is an important factor in pulse-code modulation using time-division multiplex?

Synchronization of transmit and receive clock pulse rates.

When you talk on a phone while being among several users of the same line, you don't experience sharing other people's conversations. This is because of super fast switching which transmits and receives multiple signals.

Of course, the sending and receiving pulses must be precisely timed and synchronized.

For more info, please see Geeks for Geeks site article on Frequency Division and Time division multiplexing

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In a pulse-width modulation system, what parameter does the modulating signal vary?

Pulse duration.

Width of a wave defines the amount of time it needs, so duration is the factor that changes with the width of the wave.

For more info, please see Wikipedia's article on Pulse-width modulation.

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What is the name of the type of modulation in which the modulating signal varies the duration of the transmitted pulse?

Pulse-width modulation.

Width of a wave defines the amount of time it needs, so duration is the factor that changes with the width of the wave.

For more info, please see Wikipedia's article on Pulse-width modulation.

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Which of the following best describes a pulse modulation system?

The peak transmitter power is normally much greater than the average power.

In this system, the magnitude of the amplitude of the wave carries the data. Once received, the amplitude signals have to be demodulated.

For more info, please see Wikipedia's article on Pulse-amplitude modulation

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In a pulse-position modulation system, what parameter does the modulating signal vary?

The time at which each pulse occurs.

In addition to the magnitude of the amplitude of the wave, the duration of the wave (width) is the other key factor.

For more info, please see Wikipedia's article on Pulse-amplitude modulation

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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.

In addition to the magnitude of the amplitude of the wave, the duration of the wave (width) is the other key factor.

For more info, please see Wikipedia's article on Pulse-amplitude modulation

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