Agilent Technologies HP 16500B Manual page 117

Common Commands
*TST (Test)
*TST (Test)
Query *TST?
The *TST query returns the results of the power-up self-test. The result of
that test is a 9-bit mapped value which is placed in the output queue. A one
in the corresponding bit means that the test failed and a zero in the
corresponding bit means that the test passed. Refer to table 8-7 for the
meaning of the bits returned by a TST? query.
Returned Format
<result><NL>
An integer 0 through 511
<result>
Example
10 OUTPUT XXX;"*TST?"
20 ENTER XXX;Tst_value
Table 8-7 Bits Returned by *TST? Query (Power-Up Test Results)
Bit Position
8
7
6
5
4
3
2
1
0
8–18
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Bit Weight Test
256 Disk Test
128 not used
64 not used
32 Front-panel Test
16 HIL Test
8 Display Test
4 Interupt Test
2 RAM Test
1 ROM Test