Models 2500 and 2502 User’s Manual Limit Testing 11-19
Step 3. Configure limit tests.
Select and configure the following limit tests parameters as explained in “Configuring
limit tests,” page 11-16:
• Use DIGOUT to configure the Digital I/O port for SIZE, MODE, and AUTO-CLEAR.
• Set your H/W-LIMITS and S/W-LIMITS parameters as desired. Remember that Limit
1 and Limit 2 are the compliance limits for channel 1 and channel 2 respectively, while
the data source for Limit 3 through Limit 6 depends on the selected FEED (MSR1,
MSR2, RATIO, or DELTA).
• Set up PASS conditions for Digital I/O bit pattern.
• If using 3-bit port size, program the Digital I/O Line 4 EOT-MODE for EOT or BUSY,
as appropriate.
Step 4. Turn output on.
Press the ON/OFF key to turn the output on (red OUTPUT indicator turns on). The Model
2500 will output the programmed bias voltage level.
Step 5. Start testing process.
To enable the limit tests, press the LIMIT key. If the /SOT line of the Digital I/O is being
used by a handler, the testing process will not start until the handler sends a low-going
pulse. Otherwise the testing process will start when LIMIT is pressed.
Step 6. Stop testing process.
The testing process can be terminated at any time by again pressing LIMIT. When using a
handler, the testing process will stop after the last DUT is tested.
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