2 Power Meter Operation
94 E4418B Power Meter User’s Guide
Self Test
The power meter has three distinct self test modes:
• power on self test, which occurs automatically when you turn on the
power meter.
• confidence check, which is accessed via the front panel and requires
your assistance in order to verify the POWER REF and measurement
path accuracy.
• troubleshooting mode, which is accessed via the front panel or
remotely. The front panel softkey menu allows you to run individual
tests, whereas the remote command runs a complete series of tests as
listed in
“Remote Testing” on page 97.
Power On Self Test
The power on self test is performed automatically when the power meter
is turned on and takes approximately 10 seconds to complete. The power
on self test consists of the following tests:
• RAM Battery
• Calibrator
• Measurement AssemblyFan
• Serial Interface
• Option 001 Battery
Refer to “Test Descriptions” on page 98, if you require a description of
each individual test.
As the power on self test takes place, the message “Testing...” appears next
to the name of the test which is being performed. When each test is
complete, the message “Testing...” is replaced by either the message
“Passed” or “Failed”. The Option 001 Battery test can also produce the
message “Not Present”. If a failure occurs, the message “Power- up H/W
Err” appears. Any errors are also written to the error queue and can be
examined in the “Errors” screen by pressing
, , .
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