Exercise: Communication Systems

Questions for: Communication Systems

Tropospheric scatter is used with frequencies in the range of
A:
VLF
B:
HF
C:
UHF
D:
VHF
Answer: B
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CSSB stands for
A:
Compatible Single Sideband
B:
Compressed Single Sideband
C:
Carrier Single Sideband
D:
Coded Single Sideband
Answer: A
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In a square law modulator, the carrier frequency should be __________ times than the highest modulating frequency.
A:
1
B:
2
C:
4
D:
3
Answer: D
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In a low level AM system, the amplifier which follows the modulated stage must be the
A:
linear device
B:
harmonic device
C:
class C amplifier
D:
non-linear device
Answer: A
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The tuned circuit of the oscillator in a simple AM transmitter employs a 50 H coil and a 1 nanofarad capacitor. If the oscillator output is the carrier frequency will be
A:
448 kHz
B:
555 kHz
C:
625 kHz
D:
712 kHz
Answer: D
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