Communication Systems - Online Test
Q1. To increase the range of line of sight communication
Answer : Option B
Explaination / Solution:
No Explaination.
Q2. With reference to the figure the value of can be calculated by
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. A transmitting antenna at the top of a tower has a height 32 m and the height of the receiving antenna is 50 m. What is the maximum distance between them for satisfactory communication in LOS mode? Given radius of earth is 6.4 m.
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. baseband signal refers to the
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. need for modulation arises from antenna considerations. If base band signal is to be transmitted then
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. need for modulation also arises from
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. Pulse is specified by pulse height or the peak voltage, the pulse duration and pulse to pulse spacing. In pulse amplitude modulation (PAM) what changes with base band signal is
Answer : Option A
Explaination / Solution:
No Explaination.
Q8. To reduce the distortion in amplitude modulation, modulation index is kept
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. A message signal of frequency 10 kHz and peak voltage of 10 volts is used to modulate a carrier of frequency 1 MHz and peak Voltage of 20 volts. Determine the modulation index
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. A message signal of frequency 10 kHz and peak voltage of 10 volts is used to modulate a carrier of frequency 1 MHz and peak voltage of 20 volts. Determine the side bands produced.
Answer : Option C
Explaination / Solution:
No Explaination.
