HP 8112A Operating, Programming And Servicing Manual page 173

LEE
1 ms
TRE 1 ms
26. Observe TRE on the oscilloscope and adjust A2R27 for 1 .000 ms
±5 µs.
27. Switch COMPL on and off and adjust A2R27 for best
compromise 1 .000 ms ±5µs.
28. Set the HP 8 1 1 2A as follows:
PER 50 ms
LEE 10 ms
TRE 10 ms
29. Observe LEE and TRE on the oscilloscope and adjust A2R28
whilst switching COMPL on and off, and adjust for best
compromise 1 0.00 ms ±50 µs .
30. If the last two steps cannot be achieved, repeat steps 1 1 to 26 for
the minimum difference between LEE and TRE.
3 1 . Set the HP 8 1 1 2A as follows:
PER
LEE
TRE
32. Connect the HP 8 1 12A 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 A 1 C304 for best compromise
of LEE and TRE { 100 ns ±2 ns ).
35. Set the HP 8 1 1 2A as follows:
LEE
TRE
36. Observe the oscilloscope and adjust A2R26 for best compromise
of LEE and TRE ( 50 ns ± 1 ns).
500 ns
1 00 ns
1 00 ns
49.9 ns
49.9 ns
Adjustment Procedures 9-2 1