Keysight Technologies N5247B Service Manual page 120

Troubleshooting
Rear Panel Troubleshooting
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.
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
Analyzers" on page
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. If the Windows Desktop is not displayed, press UTILITY
b. On the Windows Taskbar menu, click Start, point to Programs,
c. The command prompt window is displayed.
4-24
4-26.
Configure
then , then
Taskbar menu at the bottom of the display.
Accessories, and then click Command Prompt.
"Testing Between Two
Control Panel...
to view the Windows
Keysight N5247B Service Guide
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