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Principles of Electronic Communication Systems 4th Edition by Frenzel – Test Bank

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  • ISBN-10 ‏ : ‎ 0073373850
  • ISBN-13 ‏ : ‎ 978-0073373850

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SKU:tb1002790

Principles of Electronic Communication Systems 4th Edition by Frenzel – Test Bank

Indirect FM circuits make use of techniques for varying the frequency of the carrier oscillator in accordance with the modulating signal.

 

FALSE

2.

Blooms: 2. Understand

Chapter: 06 FM Circuits

Difficulty: Easy

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

Indirect modulators produce FM via a phase shifter after the carrier oscillator stage.

 

TRUE

3.

Blooms: 1. Remember

Chapter: 06 FM Circuits

Difficulty: Easy

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

A frequency demodulator is a circuit that varies carrier frequency in accordance with the modulating signal.

 

FALSE

4.

Blooms: 2. Understand

Chapter: 06 FM Circuits

Difficulty: Easy

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

Most varactors have nominal capacitance in the 1- to 200-pF range.

 

TRUE

Blooms: 1. Remember

Chapter: 06 FM Circuits

Difficulty: Hard

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

5.

Crystal oscillators are generally used to set carrier frequency.

 

TRUE

6.

Blooms: 1. Remember

Chapter: 06 FM Circuits

Difficulty: Medium

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

A frequency multiplier circuit is one whose output frequency is some integer multiple of the input frequency.

 

TRUE

7.

Blooms: 1. Remember

Chapter: 06 FM Circuits

Difficulty: Hard

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

Oscillators whose frequencies are controlled by an external input voltage are generally referred to as voltage-controlled oscillators.

 

TRUE

8.

Blooms: 2. Understand

Chapter: 06 FM Circuits

Difficulty: Medium

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

The Schmitt trigger circuit is a reactance modulator.

 

FALSE

Blooms: 2. Understand

Chapter: 06 FM Circuits

Difficulty: Hard

Section: 06.01 Frequency Modulators

Subtopic: Frequency Modulators

Topic: FM Circuits

9.

A reactance modulator produces a frequency deviation over a small range and it is nonlinear.

 

FALSE

Blooms: 1. Remember

Chapter: 06 FM Circuits

Difficulty: Hard

Section: 06.02 Phase Modulators

Subtopic: Phase Modulators

Topic: FM Circuits

10. The reason for using direct FM instead of PM is that the carrier oscillator can be optimized for frequency accuracy and stability.

 

FALSE

Blooms: 2. Understand

Chapter: 06 FM Circuits

Difficulty: Hard

Section: 06.02 Phase Modulators

Subtopic: Phase Modulators

Topic: FM Circuits

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