CE QUIZ 1 - ANALOG MODULATION

Conventional AM is also known as

• DSBSC

• DSBFC

• SSB

• VSB

Identify the condition for critical modulation

• Vm < Vc

• Vm = Vc

• Vm > Vc

• none

Why do we suppress carrier signal in DSBSC?

• Power is saved

• Carrier does not convey any information

• Carrier suppression never affects the message

• All of these

expand DSBFC

If Vm > Vc, then modulation index m is

• m>1

• m<1

• m=1

Bandwidth of Amplitude Modulation is

• fc + fm

• fc -fm

• 2 fm

• 2 fc

Bandwidth of DSBSC is

• fc + fm

• fc -fm

• 2 fm

• 2 fc

What are the components present in an Amplitude modulated wave?

• carrier signal

• lower side band & upper side band

• both A and B

• only B

The ratio between the modulating signal voltage and the carrier voltage is called

• Amplitude modulation

• Modulation index

• Modulation frequency

• Ratio of modulation

Calculate the percentage of modulation when m = 0.8