Power Meter Operation
Contacting Agilent Technologies
2-82 Agilent E4419B User’s Guide
Check the Basics
Problems can be solved by repeating what was being performed when the 
problem occurred. A few minutes spent in performing these simple checks 
may eliminate time spent waiting for instrument repair. Before calling 
Agilent Technologies or returning the power meter for service, please 
make the following checks:
• Check that the line socket has power.
• Check that the power meter is plugged into the proper ac power 
source.
• Check that the power meter is switched on.
• Check that the line fuse is in working condition.
• Check that the other equipment, cables, and connectors are 
connected properly and operating correctly.
• Check the equipment settings in the procedure that was being 
used when the problem occurred.
• Check that the test being performed and the expected results are 
within the specifications and capabilities of the power meter.
• Check the power meter display for error messages. Refer to 
Chapter 4 for further information.
• Check operation by performing the self tests.
• Check with a different power sensor.
Instrument serial numbers
Agilent Technologies makes frequent improvements to its products to 
enhance their performance, usability and reliability. Agilent Technologies 
service personnel have access to complete records of design changes for 
each instrument, based on the instruments’ serial number and option 
designation.
HP4402.book  Page 82  Thursday, November 30, 2000  1:39 PM