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WorksheetsFrequency and Modulation
Total questions: 17
Worksheet time: 9mins
Name
Class
Date
1.
What does frequency refer to?
a)
Putting audio onto the RF carrier signal
b)
The height of an audio wave
c)
How many times a wave repeats itself in a second
d)
How loud your audio is
2.
What does modulation refer to?
a)
Putting audio onto the RF carrier signal
b)
The height of an audio wave
c)
How many times a wave repeats itself in a second
d)
How loud your audio is
3.
What is the FCC assigned frequency range for AM stations?
a)
540 to 1700
b)
520 to 1100
c)
560 to 880
d)
530 to 1600
4.
What is the FCC assigned frequency range for FM stations?
a)
81.9 to 101.7
b)
87.9 to 107.9
c)
89.9 to 108.1
d)
88.1 to 106.9
5.
How many hertz in a kilohert?
a)
10
b)
100
c)
1000
d)
.1
6.
How many hertz is a megahert?
a)
a hundred
b)
a thousand
c)
a million
d)
a tenth
7.
How many hertz can an AM station fluctuate off its assigned frequency?
a)
20
b)
200
c)
2000
d)
.2
8.
How many hertz can an FM station fluctuate off its assigned frequency?
a)
20
b)
200
c)
2000
d)
.2
9.
What does a frequency monitor tell you?
a)
What frequency you're operating on
b)
How far your station is from your assigned frequency
c)
How loud your station is
d)
How much your station is interfering
10.
What is the FCC's modulation limit for AM stations?
a)
100%
b)
100% pos & 125% negative peaks
c)
85%
d)
125% pos & 100% neg peak
11.
What is the FCC's modulation limit for FM stations?
a)
100%
b)
100% pos & 125% negative peaks
c)
85%
d)
125% pos & 100% neg peak
12.
How much does the FCC allow AM stations' frequencies to vary in modulation?
a)
50Hz to 10kHz
b)
50Hz to 15kHz
c)
10kHz to 15kHz
d)
15Hz to 10kHz
13.
How much does the FCC allow FM stations' frequencies to vary in modulation?
a)
50Hz to 10kHz
b)
50Hz to 15kHz
c)
10kHz to 15kHz
d)
15Hz to 10kHz
14.
What is the average range of human hearing?
a)
20 Hertz to 20 kHz
b)
20 kHz to 20 MHz
c)
10 Hertz to 20kHz
d)
20 kHz to 10 MHz
15.
In addition to the left & right channel modulation, what will a Total Modulation meter show?
a)
Stereo pilot & subcarriers
b)
Antenna array & pilot signal
c)
STL signal & pilot signal
d)
Subcarriers & STL signal
16.
What stations would have three meters on their modulation monitor?
a)
AM stations
b)
FM stations
c)
FM stereo stations
d)
None
17.
What happens if you overmodulate?
a)
Maybe distortion, Maybe interferance
b)
Too much power output
c)
Distortion but not interferance
d)
Interferance but not distortion
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