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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 24
6.
FM transmitting and receiving equipment as compared to AM equipment is
costly
cheaper
almost equally costly
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
An audio signal (say from 50 Hz to 10000 Hz) is frequency translated by a carrier having a frequency of 106 Hz. The values of initial (without frequency translation) and final (after frequency translation) fractional change in frequency from one band edge to the other are
200 and 1.01
200 and 10.01
200 and 100.1
200 and 200
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
If in a broadcasting studio, a 1000 kHz carrier is modulated by an audio signal of frequency range 100-5000 kHz, the width of channel is __________ kHz.
5
4.9
995
10
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Which one of the following is analog?
PCM
PWM
Delta modulation
Differential PCM
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The disadvantage of FM over AM is that
high output power is needed
high modulating power is needed
noise is very high for high frequency
large bandwidth is required
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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