AM fundamental worksheet

Match the following

• Base-band signal

• 
• Demodulated signal

• 
• AM sampler signal

• 
• AM signal

• 
• Recovery signal

• 

Answer explanation

• C

• 
• A

• 
• B

• 

Matching block scheme​ ​

• 4

• Radio frequency power amplifier

• 1

• AM modulator

• 3

• Radio frequency generator

• 2

• Audio stage

What is domain of the figure signal?

b

Time domain

Frequency domain

What is domain of signal?

a

Frequency domain

Time domain

In amplitude modulation, the bandwidth is________

• twice the audio signal frequency

• thrice the audio signal frequency

• thrice the carrier wave frequency

• twice the carrier wave frequency

In an AM wave useful power is carrier by ___________

• Carrier

• Sidebands

• Both sidebands and carrier

• None of the above

When carrier 100 kilohertz and message 5 kilohertz are base-band signal

merged, what modulated frequencies are present?

• 100kHz

• 105kHz

• 95kHz

• None of above

What is the upper sideband of an AM transmission?

• All of the sum frequencies above the carrier.

• All of the subtraction  frequencies above the carrier.

• All of the product  frequencies above the carrier.

• None of above

An AM DSB signal is made up of which frequencies?

• ƒm and ƒc

• Modulating & Baseband

• Baseband and carrier

• Carrier, Baseband & Modulating