Agilent Technologies N1911A Programming Manual page 784

17 IEEE 488.2 Command Reference
*TST?
The *TST? (TeST) query causes the power meter to perform the self test.
The test takes approximately 100 seconds.
The result of the test is placed in the output queue.
• 0 is returned if the test passes
• 1 if the test fails
Syntax
756
?
*TST
N1911A/1912A P-Series Power Meters Programming Guide