Table of Contents
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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
xxv
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