Service Guide N5230-90024 4-19
PNA Series Microwave Network Analyzers Troubleshooting
N5230C Rear Panel Troubleshooting
Troubleshooting Systems with Controllers
Passing the preceding test indicates that the analyzer's peripheral functions are operating normally.
Therefore, if the analyzer has not been operating properly with an external controller, check the following:
• The GPIB interface hardware is incorrectly installed or not operational. (Refer to the embedded help in
your analyzer.)
• The programming syntax is incorrect. (Refer to the embedded help in your analyzer.)
LAN Troubleshooting
Problems with the Local Area Network (LAN) can be difficult to solve. Software and protocol problems can
make it difficult to determine whether the analyzer's hardware is working properly, or if there is a problem
with the LAN or cabling.
The purpose of this section is to determine if the analyzer's hardware is functioning properly. While the
turn-on self-test verifies some LAN hardware functionality, it is limited to internal testing only. Incorrect IP
addresses will prevent proper operation. Improper subnet masks may allow only one-way communication,
while improper gateway addresses may exclude outside LAN access.
Ping Command
The analyzer has the built-in capability of performing a “ping” operation. Ping will request the analyzer to
send a few bytes of information to a specific LAN device. That device will then signal the analyzer that it has
received the information. The analyzer computes the approximate round trip time of the communication
cycle and displays it. For a full test of two-way communications, a ping test should be performed in two
directions.
• First: you should ping from the analyzer to the local area network.
• Second: you should ping from the local area network to the analyzer.
NOTE In the second case, any other network device capable of sending a ping command could be
used, assuming it is connected to the same network. This could be a computer or even
another analyzer.
How to Ping from the Analyzer to the Local Area Network (LAN)
Follow the steps below to verify proper LAN operation (assuming you have a functioning LAN). If no network
LAN is available, see “Testing Between Two Analyzers” on page 4-21.
1. Make sure the IP address on the analyzer is set properly and that it is unique. If unsure how to check the
IP address, refer to the embedded help in the analyzer.
2. Make sure the subnet mask is 0.0.0.0. If not, note the current setting (to allow setting it back later) and
then set it to 0.0.0.0.
3. Find and note the IP address of another working LAN device on the same network. Make sure this device
is turned on, connected, and is functioning properly.
4. To ping the network device:
a. On the
System menu, click Windows Taskbar.
b. On the
Windows Taskbar menu, point to Programs, Accessories, and then click Command Prompt.
c. The command prompt window is displayed.
d. At the prompt, type ping xxx.xxx.xxx.xxx
1
and press Enter on the front panel or keyboard. Refer to Step 5
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