Discussion
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- Question
Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz
Options- A. 30, 60 and 70 kHz
- B. 3, 6 and 7 kHz
- C. 30, 60 and 70 MHz
- D. 3, 6 and 7 GHz
- Correct Answer
- 30, 60 and 70 MHz
- 1. EM 84 tube is used in radio receivers as
Options- A. audio amplifier
- B. RF amplifier
- C. full wave rectifier
- D. magic eye Discuss
- 2. The selectivity of most receivers is determined largely by
Options- A. sensitivity
- B. characteristics of IF section
- C. antenna direction
- D. all of the above Discuss
- 3. Which of the following is used to provide tracking between RF amplifier and local oscillator stages of receiver?
Options- A. Variable tuning inductor
- B. Ganged tuning inductor
- C. Variable capacitor
- D. Variable preset Discuss
- 4. Transistor are free from which type of noise?
Options- A. Resistance noise
- B. Partition noise
- C. Flicker noise
- D. Shot noise Discuss
- 5. The noise generated by a resistor depends upon
Options- A. its resistance value
- B. its operating temperature
- C. both its resistance value and operating temperature
- D. none of the above Discuss
- 6. The quality of a space-link is measured in terms of the __________ ratio.
Options- A. C/N
- B. S/N
- C. G/T
- D. EIRP Discuss
- 7. A geosynchronous satellite
Options- A. has the same period a that of the Earth
- B. has a circular orbit
- C. rotates in the equatorial plane
- D. has all of the above Discuss
- 8. The useful operational life of INSAT-IB (launched in 1983) is expected to end by
Options- A. 1992-93
- B. 1991-92
- C. 1989-90
- D. 1993-94 Discuss
- 9. For global communication, the number of satellites needed is
Options- A. 1
- B. 3
- C. 10
- D. 5 Discuss
- 10. A certain sound has 10000 times more energy than another sound. The number of times it would sound stronger to a listener is
Options- A. 40
- B. 10000
- C. 100
- D. 10 Discuss
Radio Receivers problems
Search Results
Correct Answer: magic eye
Correct Answer: characteristics of IF section
Correct Answer: Ganged tuning inductor
Correct Answer: Partition noise
Correct Answer: its operating temperature
Correct Answer: C/N
Correct Answer: has all of the above
Correct Answer: 1989-90
Correct Answer: 3
Correct Answer: 40
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