User manual

2400 Series SourceMeter
®
User’s Manual Limit Testing 12-3
for binning operations. See “Binning systems,” page 12-10, and Section 13,
“Digital I/O port,” for more information.
NOTE The Model 2401 does not have a handler interface and therefore cannot
be used with a component handler to perform binning operations.
• With the :CALCulate2:LIMit<n>:FAIL? query via remote, where <n> is the limit
test number (
Section 18, “CALCulate2”).
• By reading various status bits (Section 15, “Status Structure,” and Section 18,
“FORMat subsystem”).
• By noting a “P” or “F” preceding buffer location numbers (Section 9, “Recalling
readings”).
Data flow
All limit tests are part of the CALC2 data block. See Appendix C for an overview
on how limit testing fits into the overall data flow through the SourceMeter.
Limit 1 test (compliance)
This hardware (H/W) test checks the compliance state of the SourceMeter. It uses
the programmed compliance as the test limit. At or above the programmed limit,
the instrument is in compliance. Below the limit, the instrument is not in compli-
ance.
Limit 2, limit 3, and limit 5-12 tests
These software (S/W) tests are used to determine if a DUT is within specified high and
low limits. Typically, the Limit 2 test is used to test for coarse tolerance limits, and the
Limit 3 and Limit 5-12 tests are used for fine tolerance limits.
Limit 4
This hardware test is only available for instruments equipped with the optional contact
check feature. See / for details about the contact check option. Distinct Digital I/O bit
patterns can be set for each limit and each high/low pass or fail condition.
Limit test modes
There are two modes of operation for limit tests: grading and sorting. For Limit 1 test
(compliance), operation is similar for both limit test modes. If Limit 1 test fails, the
“FAIL” message is displayed and the testing process for that DUT (or DUT element) is
terminated. A pass condition allows the testing process to proceed to the next enabled
limit test.