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 12A as follows:
PER
DBL
WID
LIMIT
200 ns
20 ns
10 ns
Off
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 54121A.
33. Press
and adjust A2Rl3 for 18 ns ± 0.3 ns at 503 of
amplitude. See Figure 9-5.
50%
Ampl - - -
-
---
-- --
-------
------
--
-
- -
--
- - - ---
--
18ns
DBL
200ns
PER
Figure 9-5. Double Pulse Adjustment
34. Alter HP 81 12A 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.
Summary of Contents for 8112A
Page 6: ......
Page 24: ......
Page 36: ......
Page 44: ......
Page 70: ......
Page 92: ......
Page 144: ...8 32 Testing Performance ...
Page 176: ......
Page 190: ......
Page 194: ...10 2 4 Servicing the Power Supply ...
Page 196: ......
Page 197: ......
Page 216: ......
Page 240: ...10 4 16 Servicing the Shaper and Output Amplifier ...
Page 242: ...A R l BD RY MR I N 1 2 7 I I IJt 51 CR1 B e i 1 _ _ _ _ 20 ...
Page 244: ......
Page 251: ......
Page 262: ...A B A2 ED RY CONTROL ...
Page 270: ......
Page 290: ...R B c R3 BD RY M I CROPROCESSOR 1 2 3 FIGURE 1 0 7 8 ...
Page 294: ... 8 X2l 2 X2 Figure A 1 Mechanical Parts 1 A 2 Replaceable Parts ...
Page 295: ...MP MP3 MP MP2 MP4 MPS MP 1 2 MPS MP MP I B ElElElEl Replaceable Parts A 3 ...
Page 334: ......
Page 378: ...Figure B 14 Mechanical Parts 1 B 44 Backdating ...
Page 380: ......
Page 382: ......
Page 402: ......