Below are the answers key for Frenzel Self-test in Chapter 1: Introduction to Electronic 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. computers, communications, control ; computers
2. exchanging information
3. oral, written
4. distance, language
5. late nineteenth century
6. transmitter, receiver, channel or medium
7. wire, radio, fiber-optic cable
8. transmitter
9. receiver
10. noise, communications channel
11. degrades, attenuates
12. the atmosphere, manufactured equipment, thermal agitation in components
13. simplex, radio and TV broadcasting
14. full duplex, telephone communications
15. half duplex
16. analog
17. digital
18. analog-to-digital converter
19. base band
20. Modulation. base band, carrier
21. demodulation or detection
22. multiplexing
23. facsimile, teletext
24. garage door opener
25. paging
26. telemetry
27. radio waves
28. microwave relay, satellites, cordless phones, cellular phones
29. reflected
30. sonar (active)
31. active, passive
32. amateur or “ham” radio
33. modems
34. local area networks
35. electromagnetic waves or radio-frequency (RF) waves
36. electric, magnetic
37. 16.67 (300/18= 16.67)
38. 50, 60, ELF
39. a. c
40. 20, 20,000
41. 300, 3000
42. false
43. MF
44. short waves
45. VHF
46. land mobile, cellular telephones, military, radar and navigation, amateur radio
47. 1000
48. microwaves
49. radar, satellite
50. millimeter
51. 1 / 1,000,000
52. heat
53. 0.7, 10
54. 1 / 10.000
55. 4000,8000
56. fiber-optic cables, free space
57. bandwidth
58. sidebands
59. 125 (1.175 – 1.050 = 0.125 MHz = 125 kHz)
60. higher
61. lower
62. spectrum space
63. Communications Act of 1934
64. Federal Communications Commission
65. National Telecommunications and Information Administration
66. International Telecommunications Union
Complete List of Self-test and Reviewers in Communications Electronics
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