Keysight Technologies N5244/5B Service Manual page 123

Troubleshooting
Rear Panel Troubleshooting
1. Strip away a few inches of the outside jacket insulation from the middle of
a standard LAN cable that has an RJ-45 connector on each end.
Pins 1, 2, 3, and 6 of the connectors must be located to determine which
wires to cut in the following steps. Most, but not all, LAN cables use the
color coding listed in
scheme, you will have to determine the locations of the appropriate wires
before proceeding with this procedure.
Table 4-3
Pin Number
1 (transmit +)
2 (transmit -)
3 (receive +)
4
2. Cut the wires going to pins 1, 2, 3, and 6. Strip away a small amount of
insulation from each of the eight cut ends.
3. Insulate all exposed wires so that they cannot short together.
4. Label this as a crossover cable so that it cannot be confused with a
standard cable.
Keysight N5244B/45B Service Guide
Table
LAN Pin Definitions and Wire Color Codes
Color
White/orange
Orange
White/green
Blue
a. Connect the wire from pin 1 on one end of the cable to the wire from
pin 3 on the other end of the cable.
b. Connect the wire from pin 3 on one end of the cable to the wire from
pin 1 on the other end of the cable.
c. Connect the wire from pin 2 on one end of the cable to the wire from
pin 6 on the
other end of the cable.
d. Connect the wire from pin 6 on one end of the cable to the wire from
pin 2 on the
other end of the cable.
4-3. If your cable does not use this color
Pin Number
5
6 (receive -)
7
8
Color
White/blue
Green
White/brown
Brown
4-29