Communication

which characteristics of the carrier signal remain constant in ASK?

• Frequency and amplitude

• Amplitude and frequency

• Frequency and phase .

• Phase and amplitude

Binary ASK how many amplitude levels?

• 4
• 1
• 3
• 2

The bandwidth required for ASK is proportional to

• The phase of the signal
• The amplitude of the signal
• The frequency of the signal
• The data rate of the signal (Baud)

d=1 and r=1, bandwidth (B) is related to signal rate (S) by in ASK system

• B = (1 + d) x S

• B = S

• B = (1 + d) x S

• B = 0.5

which characteristic of the carrier signal is varied FSK?

• The amplitude of the carrier signal is varied.
• The phase of the carrier signal is varied.
• The modulation index of the carrier signal is varied.
• The frequency of the carrier signal is varied.

In FSK, how is the bandwidth calculated?

• Bandwidth = (f1 - f0) + Δf
• Bandwidth = 2 * (f1 + f0) - Δf
• Bandwidth = 2 * (f1 - f0) + 2 * Δf
• Bandwidth = f1 + f0

Phases used for BPSK

• 45 degrees and 135 degrees
• 0 degrees and 180 degrees
• 30 degrees and 150 degrees
• 90 degrees and 270 degrees

constellation diagram represent?

• Carrier frequency allocation

• The frequency of signals in a radio transmission.
• Amplitude and phase of signal elements

• The layout of stars in the night sky.

In a constellation diagram, the angle a line (vector) makes with the X-axis represents the signal element's:

• Frequency of the signal element
• Phase of the signal element
• Magnitude of the signal element
• Amplitude of the signal element

The primary resource shared in FDM is:

• the printer
• Amplitude Bandwidth

• Frequency bandwidth

• the hardware