F023 TAv 21 - Comms EO 21.02

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

1. In Amplitude Modulation, the values of ___________ changes in accordance with the freq variations of the modulating signal.

• Carrier Frequency

• Carrier Amplitude

• Carrier Phase

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

• Amplification

• Distortion

• Attenuation

Function of frequency mixer in super heterodyne receiver is

• Amplification

• Filtering

• Multiplication of incoming signal and the locally generated carrier

The diagram shows the response characteristics of what type of filter?

• Low Pass Filter

• High Pass Filter

• Band Pass Filter

• Band Stop Filter

The diagram shows the response characteristics of what type of filter?

• Low Pass Filter

• High Pass Filter

• Band Pass Filter

• Band Stop Filter

The diagram shows the response characteristics of what type of filter?

• Low Pass Filter

• High Pass Filter

• Band Pass Filter

• Band Stop Filter

The diagram shows the response characteristics of what type of filter?

• Low Pass Filter

• High Pass Filter

• Band Pass Filter

• Band Stop Filter

In the diagram, which letter represents the component that;

reduces 2nd channel interference, prevents IF break through, prevents local oscillator ration and improves the receiver's SNR

In the diagram, which letter represents the component that;

generates a signal that is different from the required signal by the intermediate frequency