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Troubleshooting
Getting Started with Troubleshooting
Getting Started with Troubleshooting
Where you begin troubleshooting depends upon the symptoms of the failure. If a
performance test or adjustment fails, refer to the troubleshooting recommendations in the
N7841A Help. For other failures, start by checking the basics as outlined in the following
section. Also review the flowchart in
determine where in the troubleshooting procedure to begin, to locate the failed assembly.
Check the Basics
A problem can often be solved by repeating the procedure you were following when the
problem occurred. Before calling Agilent Technologies or returning the instrument for
service, please perform the following checks:
1. Does the analyzer have power available? It is recommended that the battery is installed
and the AC power adapter is also connected.
2. Does the analyzer turn On and Off when the On/Off Button is pressed? When the unit is
on, the green LED below the button should light.
3. Does the analyzer power up normally into CAT mode? If not, see
Troubleshooting" on page
4. If other equipment, cables, and connectors are being used with the analyzer, make sure
they are clean, connected properly and operating correctly.
5. Review the procedure for the measurement being performed when the problem
appeared. Are all the settings correct? If not, correct them.
6. If the analyzer is not functioning as expected, return it to a known state by pressing the
key.
Preset
7. If the problem is thought to be due to firmware, check to see if the instrument has the
latest firmware before starting the troubleshooting procedure. Refer to
Upgrades"
in
Chapter 8
4-4
Figure 4-1 on page
4-6.
for instructions.
RF Vector Network Analyzer
4-5. You should then be able to
"Power Up
"Firmware
Service Guide N9923-90005
N9923AN
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Table of Contents
Troubleshooting
