LESSON 4
PRACTICE EXERCISE
1.
Which of the following statements best describes modulation?
a.
Information
c.
b.
Combination
d.
Regulation
2.
Which of the following statements best describes the process of heterodyning?
a.
The combining of two electrical signals
b.
The separating of two electrical frequencies
c.
The combining of three frequency patterns
d.
The separating of three frequency combinations
3.
What does the local oscillator produce?
a.
A mechanical signal
b.
A sound wave
c.
An electronic signal
d.
A sine wave
4.
What type of an input signal is the audio amplifier designed to accept?
a.
An electrical signal
b.
An electromagnetic signal
c.
An outgoing signal
d.
Multiplication signal
5.
Which of the following generates a turnable electronic signal?
a.
Mixer
b.
IF carrier
c.
Power supply
d.
Local oscillator
6.
Which of the following keeps the receiver at a desired operating frequency?
a.
Automatic gain control
b.
Automatic frequency control
c.
Local oscillator
d.
Power supply
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