The narrow band FM signal is 10cos(2π1000t + 0.2sin(2π100t)) what is instantaneous frequency:
A. 1000 + 20cos(2π100t)
B. 2000 + 10cos(2π100t)
C. 1000 +10sin(2π100t)
D. 2cos(2π100t)
Answer: Option A
A. 1000 + 20cos(2π100t)
B. 2000 + 10cos(2π100t)
C. 1000 +10sin(2π100t)
D. 2cos(2π100t)
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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