Principles of Electronic Communication Systems 4th Edition Frenzel Test Bank
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1.
There are only a few
modulator circuits developed that will cause the carrier amplitude to be varied
in accordance with the modulating information signal.
FALSE
2.
Blooms: 2. Understand
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Easy
Section: 04.01 Basic Principles of Amplitude Modulation
Subtopic: Basic Principles of Amplitude Modulation
Topic: Amplitude Modulator and Demodulator Circuits
If the gain of an
amplifier or the attenuation of a voltage divider is varied in accordance with
a modulating signal plus 1, AM will be produced.
TRUE
3.
Blooms: 2. Understand
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Medium
Section: 04.01 Basic Principles of Amplitude Modulation
Subtopic: Basic Principles of Amplitude Modulation
Topic: Amplitude Modulator and Demodulator Circuits
One way to generate
the product of the carrier and modulating signal is to apply both signals to a
linear component or circuit.
TRUE
4.
Blooms: 2. Understand
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Easy
Section: 04.01 Basic Principles of Amplitude Modulation
Subtopic: Basic Principles of Amplitude Modulation
Topic: Amplitude Modulator and Demodulator Circuits
A nonlinear circuit is
one in which the current is not directly proportional to the voltage.
TRUE
Blooms: 4. Analyze
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Hard
Section: 04.01 Basic Principles of Amplitude Modulation
Subtopic: Basic Principles of Amplitude Modulation
Topic: Amplitude Modulator and Demodulator Circuits
5.
Diodes and transistors
whose function is not a pure square-law function produce harmonics known as
intermodulation products.
TRUE
6.
Blooms: 1. Remember
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Medium
Section: 04.02 Amplitude Modulators
Subtopic: Amplitude Modulators
Topic: Amplitude Modulator and Demodulator Circuits
High-level modulators
produce AM at high power levels, usually in the final amplifier stage of a
transmitter.
TRUE
7.
Blooms: 2. Understand
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Medium
Section: 04.02 Amplitude Modulators
Subtopic: Amplitude Modulators
Topic: Amplitude Modulator and Demodulator Circuits
One of the more
complicated high-level amplitude modulators is the diode modulator.
FALSE
8.
Blooms: 2. Understand
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Medium
Section: 04.02 Amplitude Modulators
Subtopic: Amplitude Modulators
Topic: Amplitude Modulator and Demodulator Circuits
A transistor modulator
is used because the transistor circuit provides gain.
TRUE
Blooms: 2. Understand
Chapter: 04 Amplitude Modulator and Demodulator Circuits
Difficulty: Hard
Section: 04.02 Amplitude Modulators
Subtopic: Amplitude Modulators
Topic: Amplitude Modulator and Demodulator Circuits
9.
PIN diodes are a special
type of germanium diode for use at frequencies below approximately 100 MHz.
FALSE
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