Tektronix AFG2021 Programmer's Manual page 114

Command Descriptions
Group
Syntax
Arguments
Examples
*TST? (Query Only)
Group
Syntax
Related Commands
Arguments
Returns
Examples
2-96
Trigger
TRIGger[:SEQuence][:IMMediate]
None
TRIGger:SEQuence:IMMediate
generates a trigger event.
This command performs a self-test and returns the results.
NOTE.
The self-test can take several minutes to complete. During this time, the
instrument does not execute any commands. Do not power off the instrument
during the self-test.
Calibration and Diagnostic
*TST?
DIAGnostic[:ALL]
None
<NR1>
where:
<NR1>=0 indicates that the self-test completed without errors.
<NR1>≠0 indicates that the instrument detected an error.
*TST?
performs a self-test and returns 0 if no error is reported.
AFG2021 Arbitrary Function Generator Programmer Manual