Service Guide N5227-90001 4-21
PNA Series Microwave Network Analyzers Troubleshooting
N5227A Rear Panel Troubleshooting
If neither function properly:
• One or both IP addresses could be wrong.
• One or both LAN states could be set to off.
• The crossover cable could be miswired.
• One or both analyzers could be defective.
If possible, eliminate the possibility of a defective analyzer by substitution of a known working unit. Once the
analyzer has been proven to be working properly, concentration can be placed on the network itself to
determine the cause of the failure.
Constructing a Crossover Cable
A crossover cable can be made from a standard LAN cable by connecting pin 1 from each connector to pin 3
of the other connector, and pin 2 from each connector to pin 6 of the other connector.
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.
NOTE 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 Table 4 -3. If your
cable does not use this color scheme, you will have to determine the locations of the
appropriate wires before proceeding with this procedure.
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