HP 8112A Operating, Programming And Servicing Manual page 173

LEE 1 ms
1 ms
TRE
26. Observe TRE on the oscilloscope and adjust A2R27 for 1.000 ms
27. Switch COMPL on and off and adjust A2R27 for best
compromise 1.000 ms f5ps.
28. Set the HP 8112A as follows:
PER 50 ms
10 ms
LEE
10 ms
TRE
29. Observe LEE and TRE on the oscilloscope and adjust A2R28
whilst switching COMPL on and off, and adjust for best
compromise 10.00 ms f50 ps.
30. If the last two steps cannot be achieved, repeat steps 11 to 26 for
the minimum difference between LEE and TRE.
31. Set the HP 8112A as follows:
PER
LEE
TRE
32. Connect the HP 8112A to the HP 54121A oscilloscope using two
20 dB attenuators.
33. Set the oscilloscope to display one pulse and set it to measure
Rise/Fall time.
34. Observe the oscilloscope and adjust AlC304 for best compromise
of LEE and TRE (100 ns f2 ns).
35. Set the HP 8112A as follows:
LEE
TRE
36. Observe the oscilloscope and adjust A2R26 for best compromise
of LEE and TRE (50 ns fl ns).
500 ns
100 ns
100 ns
49.9 ns
49.9 ns
Adjustment Procedures 9-21