Tektronix SPG8000 Technical Reference page 69

GPI input functional test
SPG8000 Specifications and Performance Verification
This procedure checks that the GPI input is functioning correctly. If you have just
completed the previous test, do the following:
1. Configure the GPI input of the SPG8000 to reset the program time:
a. Press the SYSTEM button.
b. Use the down (▼) arrow button to select GPI, and then press the ENTER
button.
c. Use the down (▼) arrow button until you see INPUT TRIGGER.
d. Press the right (►) arrow button until you see Reset Program Time,
and then press the ENTER button.
2. Check that the reference source is set to Internal as follows:
a. Press the REF button.
b. Use the right (►) or left (◄) arrow button to view Internal.
c. Press the ENTER button.
3. Press the STATUS button.
4. Press the down (▼) arrow button to select TIME : Internal.
5. Press the right (►) arrow button to view the Program Time, and then record
the value.
6. Attach a 75 Ω terminator to the GPI input for 2 seconds, and then remove it.
7. Look at the program time now and compare it to the program time you wrote
down before. The time on the display should have reset to the default start
time of 00:00:00:00 and now be counting again.
8. Record Pass or Fail in the test record.
Performance verification
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