HP 8112A Operating, Programming And Servicing Manual page 164
50 mhz programmable pulse generator
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- Operating, programming and servicing manual (406 pages)
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Note
9-12 Adjustment Procedures
28. Check that the mid-range for 3.5 ms is ± 50 ms.
29. Repeat steps 18 to 28 and re-adjust if necessary.
If the adjustment is not possible add the value of A2VR4/R64 (See
table 9- 1 ) and repeat steps 18 to 28.
30. Set the HP 8 1 1 2A as follows:
PER
DBL
WID
LIMIT
3 1 . Connect HP 8 1 12A Trigger Output via a 20 dB attenuator, to
Ext. trigger of the HP 54121A.
32. Connect HP 8 1 1 2A Output via a 20 dB attenuator to input 4 of
the HP 541 21A.
33. Press (Autoscale) and adjust A2Rl3 for 18 ns ± 0.3 ns at 503 of
amplitude. See Figure 9-5.
50%
Ampl - - -
Figure 9-5. Double Pulse Adjustment
34. Alter HP 81 1 2A DBL to 99.9 ns.
35. Adjust A2R61 for 100 ns ±1 ns at 50 3 of amplitude.
36. Alter HP 8 1 12A DBL to 50 ns.
37. Check that the mid-range reading for 50 ns ± 2ns at 503 of
amplitude.
38. If necessary, repeat steps 30 to 37 and adjust if necessary.
200 ns
20 ns
10 ns
Off
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18ns
DBL
PER
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