For telegraphy the most commonly used modulation system is
A. FSK
B. Two tone modulation
C. PCM
D. Single tone modulation
Answer: Option A
A. FSK
B. Two tone modulation
C. PCM
D. Single tone modulation
Answer: Option A
It is found that a ship to ship communication suffers from fading. This can be avoided by using
A. Space diversity
B. Frequency diversity
C. Broad band antenna
D. Directional antenna
A. A double-tuned amplifier
B. A high gain D.C. amplifier
C. A cathode follower stage
D. None of the above
A. Filter method
B. Phase cancellation method
C. Good attenuation characteristics
D. All of the above
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