Exercise: Communication Systems

Questions for: Communication Systems

A paraboloid reflector has mouth diameter D meters, wavelength λ meters. Its beam width φ is equal to
A:
B:
C:
D:
Answer: A
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A MASER is a
A:
low noise device
B:
high noise device
C:
medium noise device
D:
may be either high or medium noise device
Answer: A
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In figure the output v(t) is
A:
phase modulated signal
B:
amplitude modulated signal
C:
frequency modulated signal
D:
none of the above
Answer: C
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In pulse transmitter the ratio of time on to time off is called
A:
efficiency
B:
duty cycle
C:
base
D:
bandwidth
Answer: B
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In a colour TV receiver, AGC adjusts the gain of
A:
RF stage only
B:
IF stage only
C:
RF stage and one or two IF stages
D:
none of the above
Answer: C
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