Below are the answers key for Frenzel Self-test in Chapter 2: Amplitude Modulation and Single-Sideband Modulation 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. translated
2. varies, carrier
3. modulator, carrier, modulating signal
4. amplitude
5. false
6. envelope, modulating signal
7. time-domain
8. Vc = sin 2 fct
9. true
10. c
11. c
12. a
13. d
14. modulating signal, carrier
15. 43.4
16. 100
17. 17.34 V
18. 66.67
19. sidebands
20. 635, 625
21. 10
22. time, oscilloscope
23. frequency, spectrum analyzer
24. sidebands
25. d
26. Carrier, upper sideband, lower sideband
27. b
28. b
29. antenna
30. carrier, sideband
31. 0.45
32. 5.06
33. 63.25
34. 236 W
35. 400 W, 89.44 percent
36. 1.8 amperes
37. DSB
38. false
39. b
40. a
41. less spectrum space, more power in the sidebands with greater efficiency, less noise, little or no fading
42. telephone systems, two-way radio
43. c
44. true
45. vestigial sideband
46. 863.7
47. 345
48. 3-, 4-W
49. frequency conversion
50. mixer, converter
51. 4.155 MHz, 7.855 MHz, 455 kHz, 3.7 MHz
52. 117.8 MHz
53. filter or tuned circuit
54. false
55. true
56. heterodyning
Post a Comment