10 Maintenance
278 Keysight N1911A/1912A User’s Guide
– 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.
– Check operation by performing the self tests.
– Check with a different power sensor.
Instrument serial numbers
Keysight Technologies makes frequent improvements to its products to enhance
their performance, usability and reliability. Keysight Technologies service
personnel have access to complete records of design changes for each
instrument. The information is based on the serial number and option designation
of each power meter.
Whenever you contact Keysight Technologies about your power meter have a
complete serial number available. This ensures you obtain the most complete and
accurate service information. The serial number can be obtained by:
– interrogating the power meter over the remote interface using the *IDN?
command.
– from the front panel by pressing , , , .
– from the serial number label.
The serial number label is attached to the rear of each Keysight Technologies
instrument. This label has two instrument identification entries. The first provides
the instruments serial number and the second provides the identification number
for each option built into the instrument.
The serial number is divided into two parts: the prefix (two letters and the first four
numbers), and the suffix (the last four numbers).
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