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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 12
46.
Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?
It is possible to generate SSB at any frequency
SSB with lower audio frequencies present can be generated
Switching from one sideband to other is simpler
There are more balanced modulators; therefore the carrier is suppressed better
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Pulse modulation is used in
radio navigation
automatic landing equipment
data communications
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
In an amplitude modulated waveform, the amplitude of the sideband is
independent of the carrier amplitude
independent of the modulation index
carrier amplitude x modulation index
1/2 carrier amplitude x modulation index
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
In communication systems the frequency range used for voice is
15 Hz to 150 Hz
30 Hz to 1000 Hz
100 Hz to 1500 Hz
300 Hz to 3800 Hz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
In a radio receiver with simple AGC
the highest AGC voltage is produced between stations
an increase in signal strength produces more AGC
the audio stage gain is normally controlled by AGC
the faster the time constant of AGC, more accurate the output
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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