Discussion
Home ‣ Electronics and Communication Engineering ‣ Radio Receivers Comments
- Question
Power spectral density of white noise
Options- A. is constant with frequency
- B. increases with frequency
- C. decreases with frequency
- D. none
- Correct Answer
- is constant with frequency
- 1. FM receivers using the standard 88 to 108 MHz band use IF of
Options- A. 8 MHz
- B. 9.9 MHz
- C. 10.7 MHz
- D. 12.2 MHz Discuss
- 2. A padder is basically a/an
Options- A. insulator
- B. variable resistor
- C. capacitor
- D. inductor Discuss
- 3. In a transistor receiver, the use of FET as the first stage amplifier is likely to
Options- A. improve selectivity of the receiver
- B. improve the effectiveness of the AGC
- C. reduce the effect of negative peak clipping
- D. reduce the effect of noise at all frequencies Discuss
- 4. Three point tracking can be achieved with
Options- A. gang condenser
- B. variable selectivity
- C. paddar capacitor
- D. any of the above Discuss
- 5. Statement 1
Diode is the most common device used for demodulation.
Statement 2
A discriminator is a FM detector.
Options- A. Statement 1 is true but statement 2 is false
- B. Statement 1 is false but statement 2 is true
- C. Both the statements are true
- D. Both the statements are false Discuss
- 6. A FM signal with modulation index Mf is passed through a frequency doubler. The wave in the output of the doubler will have modulation index of
Options- A. Mf
- B. Mf/2
- C. 2Mf
- D. UMf Discuss
- 7. In a FM waveform, the side bands are spaced at intervals equal to
Options- A. four times the modulating frequency
- B. twice the modulating frequency
- C. half the modulating frequency
- D. modulating frequency Discuss
- 8. The purpose of incorporating a pre-selector stage in a receiver is to
Options- A. provide higher selectivity
- B. provide higher fidelity
- C. improve linearity
- D. larger passband Discuss
- 9. In a radio receiver, the local oscillator is always tuned to a frequency higher than the incoming frequency to
Options- A. facilitate tracking
- B. allow permit adequate frequency coverage without switching
- C. facilitate image frequency rejection
- D. all of the above Discuss
- 10. Low-orbit satellites are not used for communications because they
Options- A. produce sonic booms
- B. do not provide 24 hour/ day contact to the users on Earth
- C. heat up and melt
- D. none Discuss
Radio Receivers problems
Search Results
Correct Answer: 10.7 MHz
Correct Answer: inductor
Correct Answer: reduce the effect of negative peak clipping
Correct Answer: variable selectivity
Correct Answer: Both the statements are true
Correct Answer: 2Mf
Correct Answer: half the modulating frequency
Correct Answer: provide higher selectivity
Correct Answer: allow permit adequate frequency coverage without switching
Correct Answer: heat up and melt
Comments
There are no comments.More in Electronics and Communication Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.