CHARACTERISTICS OF PULSE WAVE -- DE I THEORY

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Which waveform is used to represent an Digital Signal?

• Sinusoidal Waveform
• Clock Pulse
• Staircase Waveform
• Trianglular Waveform

Which of the following is a digital device?

• Analog Voltmeter
• Cassette Tape
• Mechanical Watch
• Digital Watch

Which of the following is an analog device?

• IPAD
• Smart TV
• Dial Telephone
• Digital Multimeter

Which format can send several bits of information faster?

• Parallel
• Serial
• Both are the same
• Can't tell

In a positive logic system, ________.

• only HIGHs are present
• only LOWs are present
• a LOW = 1, a HIGH = 0
• a HIGH = 1, a LOW = 0

The rise time is the time it takes a pulse to go from ________.

• the base line to the maximum HIGH voltage
• the base line to 90% of the pulse amplitude
• 10% of the pulse amplitude to the maximum HIGH voltage
• 10% of the pulse amplitude to 90% of the pulse amplitude

The fall time is the time it takes a pulse to go from ________.

• the maximum HIGH voltage to the base line
• 90% of the pulse amplitude to 10% of the pulse amplitude
• 90% of the pulse amplitude to the maximum LOW voltage
• 10% of the pulse amplitude to the base line

A periodic digital waveform has a pulse width (tw) of 6 ms and a period (T) of 18 ms. The duty cycle is ________.

• 0.033
• 0.333
• 0.06
• 0.18

The frequency of a pulse train is 2 kHz. The pulse period is ________.

• 5 ms
• 50 ms
• 500 μs
• 2 μs