Below are the answers key for Frenzel Self-test in Chapter 6: Radio Transmitters 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. oscillator
2. continuous-wave, CW
3. crystal oscillator
4. buffer
5. drivers
6. final
7. speech-processing
8. frequency multipliers
9. mixer
10. linear
11. class C
12. AM, SSB
13. class C
14. A, B, AB
15. 27
16. 360
17. base-collector capacitance
18. parasitic oscillation
19. neutralization
20. true
21. bridge
22. true
23. push-pull
24. 90, 150
25. pulses
26. tuned or resonant circuit
27. 60, 85
28. harmonics
29. frequency multipliers
30. 180 [2(3)(4)(5) = 120; 120(1.5)=180 MHz]
31. 50.4 [28(1.8) = 50.4 W]
32. equals
33. L network
34.pi ( ), T
35. low-pass
36. Q
37. true
38. L = 108 nH, C = 558 pF
39. L = 106 nH, C1 = 13.5 pF, C2= 34 pF
40. 450
41. 2:1
42. autotransformer
43. toroid
44. balun
45. broadband
46. clipping, compression
47. prevent over modulation and distortion, eliminate out-of-band operation
48. clipper
49. smooth out distortion caused by clipping, restrict signal bandwidth
50. splatter
51. gain
52. power
53. rectifying, filtering
54. collector current
55. automatic gain control
56. more
57. true
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