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Superheterodyne Receiver Numericals Quiz

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Superheterodyne Receiver Numericals Quiz

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Questions and Answers

What is the main purpose of the Automatic Gain Control (AGC) circuit in a superheterodyne receiver?

To convert the received signal to an intermediate frequency

To maintain a constant output voltage level over a wide range of input signal levels (correct)

To filter out unwanted signals

To amplify weak signals for reliable reception

Which component(s) of the superheterodyne receiver does the AGC circuit typically control the gain for?

Both the RF amplifier and the IF amplifiers (correct)

Only the IF amplifiers

Only the RF amplifier

None of the amplifiers, it controls the gain of the mixer

How does the AGC circuit determine the appropriate gain adjustment?

By monitoring the output signal level from the oscillator

By monitoring the output signal level from the mixer

By monitoring the output signal level from the detector (correct)

By directly monitoring the input signal level

What happens when a very high amplitude signal is applied to a receiver without AGC?

The circuits will be overloaded, causing distortion and loss of information (A) Signup and view all the answers

What type of signal does the AGC circuit produce to control the gain of the amplifiers?

A DC voltage (B) Signup and view all the answers

How is the output of the AGC circuit related to the input signal level?

The AGC output is directly proportional to the input signal level (B) Signup and view all the answers

In a superheterodyne receiver with AGC, what happens when a weak signal is received?

The AGC circuit increases the gain of the amplifiers (C) Signup and view all the answers

What is a typical design approach for the gain of a superheterodyne receiver?

The receiver is designed with very high gain so that weak signals may be reliably received (D) Signup and view all the answers