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190-00067-25 Rev D 5-5
OBI Output Test
Figure 5-2. OBI Test Page
1. Press the CRSR key.
2. Rotate the outer function knob clockwise until the OBI Test Page is displayed (Figure 5-2).
3. Press the CRSR key once.
4. Rotate the outer function knob clockwise until VALUE is selected.
5. Rotate the inner function knob clockwise to select CLOCK.
6. Measure voltage across J1-7 and J1-22.
7. Rotate the outer function knob clockwise until LOW is selected. Verify the DMM voltage is
less than 1.0 VDC.
8. Rotate the inner function knob to select HIGH. Verify the DMM voltage is greater than 4.5 VDC.
9. Rotate the outer function knob counterclockwise until CLOCK is selected.
10. Rotate the inner function knob clockwise to select DATA.
11. Measure voltage across J1-8 and J1-22.
12. Rotate the outer function knob clockwise until LOW is selected. Verify the DMM voltage is less
than 1.0 VDC.
13. Rotate the inner function knob to select HIGH. Verify the DMM voltage is greater than 4.5 VDC.
14. Rotate the outer function knob counterclockwise until DATA is selected.
15. Rotate the inner function knob clockwise to select SYNC.
16. Measure voltage across J1-23 and J1-22.
17. Rotate the outer function knob clockwise until LOW is selected. Verify the DMM voltage is less
than 1.0 VDC.
18. Rotate the inner function knob to select HIGH. Verify the DMM voltage is greater than 4.5
VDC.