HP 8112A Operating, Programming And Servicing Manual page 172

9-20 Adjustme& Procedures
T R E 999 ps
4
6. Set the HP 8112A as follows:
RCL 1
7. Connect the HP 8112A Trigger Output to the oscilloscope
Trigger Input.
8. Connect the HP 8112A output to input 4 of the oscilloscope.
9. Set the oscilloscope to display one pulse using the Delta t
mode.
10. Observe LEE on the oscilloscope (10% - 90% of amplitude).
Adjust A2R37 for about 0.5% below programmed value (i.e. 99.5
11. Set the HP 8112Aa.s follows:
2
RCL
12. Observe LEE on the oscilloscope and adjust A2R32 for about
0.5% below programmed value (i.e. 995 ps).
13. Repeat last two steps and re-adjust if necessary.
14. Set the HP 8112A as follows:
5
RCL
15. Check LEE on the oscilloscope for < 510 ps and > 480 ps.
16. Step LEE up and down using the vernier keys and observe the
oscilloscope for < 2% deviation.
17. Set the HP 8112A as follows:
3
RCL
18. Observe TRE on the oscilloscope (90% - 10% of amplitude) and
adjust A2R38 for about 0.5% below programmed value (i.e. 99.5
19. Set the HP 8112A as follows:
4
RCL
20. Observe TRE on the oscilloscope and adjust A2R35 for about
0.5% below programmed value (i.e. 995 ps).
21. Repeat last two steps and re-adjust if necessary.
22. Set the HP 8112A as follows:
5
RCL
23. Check TRE on the oscilloscope for < 510 ps and > 480 ps.
24. Step TRE up and down using the vernier keys and observe the
oscilloscope for < 2% deviation.
Set
25. the HP 8112A as follows: