Agilent Technologies E4419B, User Manual

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Power Meter Operation 2
E4419B Power Meter User’s Guide 103
confidence check has been successful. While the test is running, the
message “
Testing...
” appears. If the correct power meter reading is
made, the message “
Passed
” is displayed, otherwise “
Failed
” is displayed.
If the confidence check fails, the failure appears in the error queue. To
examine the error queue, go to the “Errors” screen (refer to
Chapter 4 ).
Remote Testing
To invoke the remote self test, the IEEE 488.1 compliant standard command,
*TST?
is used. This command runs a full self test and returns one of the
following codes:
•
0 - no tests failed
•
1 - one or more tests failed
The remote self test consists of the following tests:
•
ROM checksum
•
RAM
•
RAM Battery
•
Display Assembly
•
Calibrator
•
Measurement Assemblies
•
Communications Assembly (Implicit)
The communications assembly is tested implicitly, in that the command will
not be accepted or return a result unless the GPIB interface is functioning
correctly.
Refer to “Test Descriptions” on page 104, if you require a description of each
individual test.
When the
*TST?
command is executed, the screen is cleared. As each test
takes place, the name of the test is listed on the screen. While a test is running,
the message “
Testing...
” appears next to the name of the test. As each
stage of the test is completed, the message “
Testing...
” is replaced by
either the message “
Passed
” or “
Failed
”.