Spectrum of AM SC Waves Online Exam Quiz
Spectrum of AM SC Waves GK Quiz. Question and Answers related to Spectrum of AM SC Waves. MCQ (Multiple Choice Questions with answers about Spectrum of AM SC Waves
A single sideband modulation system requires a more complex demodulator circuit.
Options
A : TRUE
B : FALSE
C : -
D : -
An ungrounded antenna near the ground __
Options
A : must be horizontally polarized
B : acts as an antenna array
C : is unlikely to need a ground screen
D : acts as a single antenna of twice the height
Field strength at a distance from an antenna is measured with __
Options
A : a slotted line
B : a dipole
C : an EIRP meter
D : a field strength meter
The __ of an AM signal resembles the shape of baseband signal.
Options
A : upperband
B : lowerband
C : efficiency
D : envelope
The radiated beam from a parabolic ?dish? transmitting antenna is __
Options
A : dispersed
B : refracted
C : collimated
D : scattered
To demodulate a USB SSB signal, the receiver must __
Options
A : be set to USB mode
B : reinsert the carrier
C : be set to USB mode and reinsert the carrier
D : have low-fidelity
What is the full form of LPDA?
Options
A : Log Periodic Dipole Array
B : Log Periodic Dispersed Array
C : Low Periodic Dispersed Array
D : Low Power Dipole Array
Which is the standard reference antenna for the directive gain?
Options
A : Isotropic antenna
B : Marconi antenna
C : Helical antenna
D : Log Periodic antenna
Which of the following antennas is best excited from a waveguide?
Options
A : Marconi
B : Horn
C : Helical
D : Discone
Which one of the following reasons for the use of a ground screen with antennas is false?
Options
A : Impossibility of a good ground connection
B : Provision of an earth for the antenna
C : Protection of personnel working underneath
D : Improvement of radiation pattern of antenna