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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 17
26.
To couple a coaxial line to a parallel line wire it is best to use
slotted line
balun
directional coupler
transformer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The total bandwidth needed for an AM signal at 55.25 MHz with 0.5 MHz video modulation is
0.25 MHz
0.5 MHz
1 MHz
10 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The bandwidth required for amplitude modulation is
half the frequency of modulating signal
equal to the frequency of modulating signal
twice the frequency of modulating signal
four times the frequency of modulating signal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
In PM, without any modulation, all the transmitted pulses have the same
amplitude
width
amplitude and spacing
amplitude, spacing and width
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Colour picture tube needs higher anode voltage and needs larger beam and cathode currents than monochrome tube because
it is bigger in size
it has higher level of illumination
the tube has to illuminate three phosphors simultaneously
the tube has lower efficiency because of aperture mask
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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