Below are the answers key for Frenzel Self-test in Chapter 11: Satellite Communications from the book COMMUNICATIONS ELECTRONICS by Louis E. Frenzel. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
1. centripetal force, gravitational pull
2. posigrade
3. ellipse
4. geocenter
5. period
6. 0,90
7. 5
8. geosynchronous or geostationary
9. attitude
10. spin, three-axis stabilization
11. yaw, pitch, roll
12. subsatellite point
13. latitude, longitude
14. azimuth, elevation
15. apogee kick motor
16. communications
17. relay station
18. earth station
19. down link
20. transponder
21. microwave
22. C
23. X
24. 10.95, 14.5
25. 500
26. 12,36
27. frequency reuse
28. spatial isolation
29. voice, video, computer or digital data
30. low-noise amplifier
31. signal amplification, frequency translation, power amplification
32. mixer
33. TWT
34. double-conversion
35. regenerative
36. bandpass filter
37. broadband, multichannel
38. solar panels
39. batteries
40. monitor, control
41. jet thrusters
42. baseband
43. down converter
44. 70
45. demodulation, demultiplexing
46. modulation, multiplexing
47. FM, QPSK
48. up converter
49. frequency synthesizers
50. transistor, TWT, klystron
51. backup power or uninterruptible power supply
52. false
53. communications
54. film cameras, TV cameras, infrared sensors, radar
55. Global Positioning System (GPS), navigation
56. weather forecasting, spying, earth resources, monitoring
57. TV reception
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