6_AM Modulation depth

What does modulation refer to?

• Putting audio onto the RF carrier signal
• The height of an audio wave
• How many times a wave repeats itself in a second
• How loud your audio is

A modulation index of 0.5 would be same as

• 0.5 of Modulation Depth

• 1/2% of Modulation Depth

• 5% of Modulation Depth

• 50% of Modulation Depth

What happens when the amplitude of the modulating signal is greater than the amplitude of the carrier?

• Decay

• Distortion

• Amplification

• Attenuation

What is the circuit used for producing AM called?

• Modulator

• Transmitter

• Receiver

• Duplexer

Choose AM modulated wave where modulation depth is less than 1

• A

• B

• C

Choose AM modulated wave where modulation depth is more than 1

• A

• B

• C

Choose AM modulated wave where modulation depth is equal to 1

• A

• B

• C

To avoid distortion, what modulation depth would you choose to be on safer side. choose one from A,B or C

• A

• B

• C

To prevent distortion, the maximum modulation depth for radio transmission is limited to _________.

• 40%

• 60%

• 80%

• 100%

A 100V carrier peak changes from 160V to 40V by a modulating signal. The modulation factor is

• 0.3

• 0.5

• 0.6

• 0.7