List of Figures
xxv
49. Return Loss Plot......................................................................119
50. Twisted Pair Impedance Results ............................................121
51. Near-End Crosstalk (NEXT).....................................................122
52. NEXT Plot................................................................................123
53. PS NEXT Plot ...........................................................................124
54. Attenuation to Crosstalk Ratio, Near End (ACR-N) ..............125
55. ACR-N Plot ..............................................................................126
56. PS ACR-N Plot .........................................................................128
57. Far-End Crosstalk (FEXT) ........................................................129
58. ACR-F Plot...............................................................................131
59. PS ACR-F Plot ..........................................................................132
60. The Effects of EMI on Balanced and
Unbalanced Twisted Pairs......................................................134
61. Resistance Unbalance in a Pair Causes Distortion of
the Data Signal in a PoE System............................................138
62. Resistance Unbalance within Pairs ........................................139
63. Resistance Unbalance Between Pairs ....................................141
64. CMRL Plot ...............................................................................143
65. Common-Mode Voltage Converts to
Differential-Mode Voltage in an RJ45 Connector................145
66. CDNEXT Plot ...........................................................................146
67. TCL Plot...................................................................................148
68. ELTCTL Plot .............................................................................149
69. How the 3 dB Rule Shows on Plots .......................................151
70. How to Use the Tone Generator ...........................................156
71. Permanent Link Connections Through a PoE Device ...........161
72. Channel Connections Through a PoE Device........................162
73. AC Wire Map Examples: Open and Short .............................163
74. AC Wire Map Examples:.........................................................164
75. Reference Connections for Tests on Coaxial Cabling...........166
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