6 Troubleshooting
150 N9342C/43C/44C User’s Guide
Check the basics
This section includes information on how to check 
for a problem with your Agilent spectrum analyzer, 
and how to return it for service.
If you experience a problem or would like 
additional information about your analyzer, Agilent 
Technologies’ worldwide organization is ready to 
provide the support you need.
• Before calling Agilent Technologies, or returning 
an analyzer for service, perform the quick checks 
listed below. This check may eliminate the prob-
lem.
• Is there power at the receptacle?
• Is the analyzer turned on?
• If other equipment, cables, and connectors are 
being used with your spectrum analyzer, make 
sure they are connected properly and operating 
correctly.
• Review the measurement procedures being per-
formed when the problem first appeared. Make 
sure all of the settings are correct.
• If the analyzer is not functioning as expected, 
return the analyzer to a known state by pressing 
Preset (Default Preset Type).
• Is the measurement being performed, and the 
results that are expected, within the specifica-
tions and capabilities of the analyzer? Refer to 
the  Technical Overview for your analyzer.
• Is the analyzer displaying an error message? If 
so, refer to “Error Messages" on page 143.
WARNING
No operator serviceable parts inside. Refer servicing to 
qualified personnel. To prevent electrical shock, do not 
remove covers.