GROL Modulation and Signal Types 2

Question 1

An AM carrier has a peak amplitude of 100V and is modulated at 80%. What is the peak amplitude of each individual sideband?

Accepted Answer

40V

Answer

80V

Answer

160V

Answer

20V

Question 2

An AM transmitter produces 1000W of carrier power. What is the total output power at 100% modulation?

Accepted Answer

1500W

Answer

2000W

Answer

1250W

Answer

3000W

Question 3

What is the RF bandwidth of an AM signal with an audio frequency range of 300Hz to 5kHz?

Accepted Answer

10kHz

Answer

5kHz

Answer

4.7kHz

Answer

9.4kHz

Question 4

What occurs when an AM signal is overmodulated (modulation index exceeds 1.0)?

Accepted Answer

The carrier is cut off during negative peaks, causing distortion and adjacent-channel splatter

Answer

The signal automatically converts to FM

Answer

Bandwidth is reduced by half

Answer

Power efficiency improves significantly

Question 5

An AM transmitter operates on 1600kHz and is modulated by a 4kHz audio tone. Where are the two sidebands located?

Accepted Answer

1596kHz and 1604kHz

Answer

1592kHz and 1608kHz

Answer

1598kHz and 1602kHz

Answer

1590kHz and 1610kHz

Question 6

What percentage of total AM transmitter power is contained in both sidebands combined at 100% modulation?

Accepted Answer

33.3%

Answer

50%

Answer

25%

Answer

66.7%

Question 7

Which ITU emission designator identifies a standard double-sideband full-carrier AM voice transmission?

Accepted Answer

A3E

Answer

F3E

Answer

J3E

Answer

R3E