A 5-kW carrier with 60 percent modulation produces _____ kW in each sideband. -
correct answer0.45
A common use of DSB is
a. Two-way communication.
b. Telephone systems.
c. FM/TV stereo. - correct answer C
A major benefit of DSB and SSB is
a. Higher power can be put into the sideband(s).
b. Greater power consumption.
c. More carrier power.
d. Double the sideband power. - correct answer a
A signal whose amplitude is displayed with respect to frequency is called a _____
domain display. The test instrument used to present such a display is the _____. -
correct answer frequency; spectrum analyzer
A signal whose amplitude is displayed with respect to time is called a _____ domain
display. The test instrument used to present such a display is the _____. - correct
answer time; oscilloscope
An AM radio station operating at 630 kHz is permitted to broadcast audio frequencies
up to 5 kHz. The upper and lower side frequencies are
fUSB = _____ kHz
fLSB = _____ kHz - correct answer635; 625
An AM signal with a carrier of 1 kW has 100W in each sideband. The percentage of
modulation is _____ percent. - correct answer63.25
An AM signal without a carrier is called a(n) _____ signal. - correct answer DSB
An AM transmitter has a carrier power of 200 W. The percentage of modulation is 60
percent. The total signal power is _____ W. - correct answer236 W
An AM wave displayed on an oscilloscope has values of Vmax= 3.8 and Vmin= 1.5 as
read from the graticule. The percentage of modulation is _____ percent. - correct
answer43.4
An amplitude modulator performs the mathematical operation of
a. Addition
b. Subtraction
c. Multiplication
d. Division - correct answer C
, An SSB signal produces a peak-to-peak voltage of 720V on voice peaks across a 75-
antenna. The PEP output is _____ W. - correct answer863.7
An SSB transmitter has a 15O-V supply. Voice peaks produce a current of 2.3 A. The
PEP input is _____ W. - correct answer345
Complex modulating signals containing many frequencies produce multiple_____ thus
occupying more spectrum space. - correct answer sidebands
During modulation, the information signal _____ the amplitude of a high frequency
signal called the _____. - correct answer varries; carrier
In AM, the instantaneous _____ of the carrier varies in accordance with the information
signal. - correct answer amplitude
In an AM signal with a carrier of 18W and a modulation percentage of 75 percent, the
total power in the sidebands is _____ W. - correct answer5.06
In the example given in the text, what other local oscillator frequency could be used to
produce the 10.7-MHz output with a 107.1 = MHz input? - correct answer117.8MHz
Information in an AM signal is conveyed in the
a. Carrier.
b. Sidebands.
c. Both together. - correct answer b
List four benefits of SSB over AM and DSB. - correct answerless spectrum space
more power in the sidebands with greater efficiency
less noise
little or no fading
List two common uses of SSB. - correct answer telephone system
two way radio
Modulation causes the information signal to be ______________ to a higher frequency
for more efficient transmission. - correct answer translated
New signals generated by the modulation process that appear directly above and below
the carrier frequency are called _____. - correct answer sidebands
The acronym SSB means
a. Single sideband with carrier
b. Single sideband with suppressed carrier
c. Double sideband with no carrier
d. Double sideband with carrier - correct answer b
correct answer0.45
A common use of DSB is
a. Two-way communication.
b. Telephone systems.
c. FM/TV stereo. - correct answer C
A major benefit of DSB and SSB is
a. Higher power can be put into the sideband(s).
b. Greater power consumption.
c. More carrier power.
d. Double the sideband power. - correct answer a
A signal whose amplitude is displayed with respect to frequency is called a _____
domain display. The test instrument used to present such a display is the _____. -
correct answer frequency; spectrum analyzer
A signal whose amplitude is displayed with respect to time is called a _____ domain
display. The test instrument used to present such a display is the _____. - correct
answer time; oscilloscope
An AM radio station operating at 630 kHz is permitted to broadcast audio frequencies
up to 5 kHz. The upper and lower side frequencies are
fUSB = _____ kHz
fLSB = _____ kHz - correct answer635; 625
An AM signal with a carrier of 1 kW has 100W in each sideband. The percentage of
modulation is _____ percent. - correct answer63.25
An AM signal without a carrier is called a(n) _____ signal. - correct answer DSB
An AM transmitter has a carrier power of 200 W. The percentage of modulation is 60
percent. The total signal power is _____ W. - correct answer236 W
An AM wave displayed on an oscilloscope has values of Vmax= 3.8 and Vmin= 1.5 as
read from the graticule. The percentage of modulation is _____ percent. - correct
answer43.4
An amplitude modulator performs the mathematical operation of
a. Addition
b. Subtraction
c. Multiplication
d. Division - correct answer C
, An SSB signal produces a peak-to-peak voltage of 720V on voice peaks across a 75-
antenna. The PEP output is _____ W. - correct answer863.7
An SSB transmitter has a 15O-V supply. Voice peaks produce a current of 2.3 A. The
PEP input is _____ W. - correct answer345
Complex modulating signals containing many frequencies produce multiple_____ thus
occupying more spectrum space. - correct answer sidebands
During modulation, the information signal _____ the amplitude of a high frequency
signal called the _____. - correct answer varries; carrier
In AM, the instantaneous _____ of the carrier varies in accordance with the information
signal. - correct answer amplitude
In an AM signal with a carrier of 18W and a modulation percentage of 75 percent, the
total power in the sidebands is _____ W. - correct answer5.06
In the example given in the text, what other local oscillator frequency could be used to
produce the 10.7-MHz output with a 107.1 = MHz input? - correct answer117.8MHz
Information in an AM signal is conveyed in the
a. Carrier.
b. Sidebands.
c. Both together. - correct answer b
List four benefits of SSB over AM and DSB. - correct answerless spectrum space
more power in the sidebands with greater efficiency
less noise
little or no fading
List two common uses of SSB. - correct answer telephone system
two way radio
Modulation causes the information signal to be ______________ to a higher frequency
for more efficient transmission. - correct answer translated
New signals generated by the modulation process that appear directly above and below
the carrier frequency are called _____. - correct answer sidebands
The acronym SSB means
a. Single sideband with carrier
b. Single sideband with suppressed carrier
c. Double sideband with no carrier
d. Double sideband with carrier - correct answer b
