WorksheetsACOM-5
Total questions: 12
Worksheet time: 10mins
What do you understand by the term SSB?
Suppressed Side Band
Single Side Band
Suppressed Single Band
Selected Single Band
Which device is has more chance to be found in SSB transmitter?
balanced modulator
class A RF amplifier
class C audio amplifier
class B RF amplifier
What do you understand by the term “carrier” in modulation?
voltage to be transmitted
resultant wave
voltage for which amplitude, phase or frequency can be varied
voltage for which amplitude, phase or frequency remains constant
Hilbert transform may be used in
Generation of SSB signals
Representation of band pass signals
Designing of minimum phase type filters
All of the Mentioned
Properties of Hilbert transform are:
The signal and its Hilbert transform have same energy density spectrum
The signal and its Hilbert transform are mutually diagonal
The signal and its Hilbert transform have same energy density spectrum and The signal and its Hilbert transform are mutually diagonal
None of the above
Generation of SSB SC signal is done by
Phase discrimination method
Frequency discrimination method
Product modulator
Phase discrimination method and Frequency discrimination method
Limitations of Frequency discrimination method are:
Cannot be used for video signals
Designing of band pass filter is difficult
annot be used for video signals and Designing of band pass filter is difficult
None of the above
In an Amplitude Modulation
Amplitude of the carrier varies
Frequency of the carrier remains constant
Phase of the carrier remains constant
All of the above
The ability of the receiver to select the wanted signals among the various incoming signals is termed as
Sensitivity
Selectivity
Stability
None of the above
The modulation technique that uses the minimum channel bandwidth and transmitted power is
FM
DSB-SC
VSB
SSB
Calculate the bandwidth occupied by a DSB signal when the modulating frequency lies in the range from 100 Hz to 10KHz.
28 KHz
24.5 KHz
38.6 KHz
19.8 KHz
In SSB generator of phase shift type the phase shift of modulating signal is deviated by 2 degree from the ideal value of 90 degree. whats is percent ratio of undesired sideband amplitude to desired sideband amplitude.
1.45
1.95
1.75
2.75
