Frenzel Self-test in Data Communications – Answers

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(Last Updated On: February 9, 2020)

Answers for Frenzel Self-test in Data Communications

Below are the answers key for Frenzel Self-test in Chapter 12: Data 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. binary or digital

2. true

3. telegraph

4. continuous wave (CW)

5. dots, dashes

6. K = _._; 8= _ _ _.. ; , = _ _.._ _

7. baudot

8. teletype

9. M

10. ASCII

11. EBCDIC

12. B = 1000010; 3 = 0110011; ? = 0111111

13. 0000111

14. serial, parallel

15. false

16. shift register

17. start, stop

18. bits per second (bits/s)

19. baud rate

20. true

21. false

22. blocks

23. space, mark

24. information theory

25. bandwidth, time

26. 10,000

27. 60,000

28. true

29. less

30. 50

31. 100

32. modulator, demodulator

33. analog, digital (or binary)

34. telephone network

35. computers

36. frequency-shift keying

37. frequencies

38. mark (1), space (0)

39. 1070, 1270, 2025, 2225

40. universal asynchronous receiver transmitter (UART)

41. phase-shift keying

42. 0, 180

43. balanced modulator

44. balanced modulator

45. carrier recovery

46. differential

47. XNOR

48. four

49. 2 bits

50. four

51. bit splitter (or shift register)

52. 2-t0-4 level converter

53. amplitude, PSK

54. true

55. false

56. true

57. false

58. true

59. protocols

60. redundancy, special error-checking codes, parity, block check code, cyclical redundancy check

61. handshaking

62. Xmodem

63. block

64. asynchronous

65. SYN or sync

66. header

67. STX, ETX or ETB

68. redundancy

69. ARQ exact-count

70. noise

71. bit error rate

72. parity

73. block check character

74.

  • a. 1
  • b. 0
  • c. 1
  • d. 1

75. vertical redundancy check

76. exclusive OR

77. block check character

78. longitudinal redundancy check

79. cyclical redundancy check

80. shift register

81. true

82. wide area network

83. true

84. local area networks

85. private branch exchange

86. false

87. star, ring, bus

88. star

89. star

90. mainframe (or mini)

91. ring

92. nodes

93. bus

94. bus

95. ring

96. gateway

97. bridge

98. twisted pair, coax, fiber-optic cable

99. tree

100. noise susceptibility, short distances, low data rates

101. coax

102.fiber-optic cable

103. coax

104. 1, 10,50

105. baseband

106. baseband

107. broadband

108. modem

109. modulation, multiplexing

110. frequency hopping, direct sequence

111. frequency synthesizer

112. pseudorandom noise code generator

113. false

114. noise

115. PSN code

116. dwell time

117. X-OR

118. true

119. PSK

120. synchronism

121. correlation

122. security, jam-proof

123. shift register

124. 902- to 928-, 2400- to 2483-, 5725- to 5850-MHz

125. wireless LANs, wireless computer modems

Complete List of Self-test and Reviewers in Communications Electronics

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