3.Data and Signals

If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ________ V.

• 2
• 1
• -2
• between -2 and 2

_________ can impair a signal.

• Noise
• Attenuation
• Distortion
• All of the above

________is the rate of change with respect to time.

• Time
• Frequency
• Amplitude
• Voltage

A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB is 0. This means ________.

• P2 equals P1
• P2 is zero
• P2 is much larger than P1
• P2 is much smaller than P1

Baseband transmission of a digital signal is possible only if we have a ____ channel.

• bandpass
• low-pass
• high rate
• low rate

________ is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.

• Distortion
• Attenuation
• Noise
• Decibel

A sine wave in the ______ domain can be represented by one single spike in the _____ domain.

• time; phase
• frequency; time
• time; frequency
• phase; time

If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?

• 5 KHz
• 47 KHz
• 57 KHz
• 10 KHz

In a time-domain plot, the horizontal axis is a measure of ________.

• phase
• signal amplitude
• frequency
• time

_______ data are continuous and take continuous values.

• digital
• analog
• (a) or (b)
• none of the above