Electronics and Communication Engineering - Communication Systems

46.
Which of the following is Doppler effect not used?
CW radar
FM radar
MTI system
Moving target plotting on PPI
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
If the AF voltage is raised to 10 V, while the AM is dropped to 200 Hz, what is the deviation?
10 kHz
15 kHz
20 kHz
40 kHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
In pulse code modulation when the maximum frequency in the signal is fmax the bandwidth required will be
p.fmax
p.fmax
≤ (p.fmax)2
≥ (p.fmax)2
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
The oscillator frequency is set for
best picture
max. sound
min. sound
sound in picture
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
The main advantage of DM over PCM is
less bandwidth
less power
simple circuit
better S/N ratio
Answer: Option
Explanation:
No answer description is available. Let's discuss.