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166 Service Procedures
Appendix D
Performance Verification Tests
The performance verification tests use the function generator's specifications
listed in “Agilent E1441A Specifications” on page 135.
You can perform four different levels of performance verification tests:
• Self-Test A series of internal verification tests that give a high
confidence that the function generator is operational.
Q • Quick Verification A combination of the internal self-tests and
selected verification tests.
P • Performance Verification Tests An extensive set of tests that are
recommended as an acceptance test when you first receive the
function generator or after performing adjustments.
O • Optional Verification Tests Tests not performed with every
calibration. These tests can be used to verify additional instrument
specifications following repairs to specific circuits.
In all cases, the function generator’s command set is used to configure its
output. Use the "Agilent E1441A" column in the following verification
tables to determine which commands to use and what parameter value should
be sent with them.
Self-Test A power-on self-test occurs automatically when you turn on the function
generator. This limited test assures you that the function generator is
operational.
A complete self-test runs a series of tests and takes approximately
10 seconds to execute. If all tests pass, you can have a high confidence that
the function generator is fully operational.
If the self-test fails, the faceplate
Errors LED turns on.
Use the following command to perform a self-test:
*TST?
Returns “0” if the self-test passes or “1” if it fails. If the self-test fails, an
error message is also generated with additional information on why the test
failed. Use the SYSTem:ERRor? command to read the error queue. See
“Self-Test Errors” on page 147 for more information.