9-6 Adjustment Procedures
Normal/Complement
6. Set the HP 81 12A Transition to FIXED.
7. Switch the HP 8112A COMPL on and off .
8. Adjust A1R403 for same HIL and LOL on the screen in both
modes.
Amplitude/Offset
9. Set the HP 81 12A Transition to FIXED.
10. Set the HP 81 12A output to COMPL off.
1 1 . Connect the HP 81 12A trigger output to the oscilloscope trigger
input via 20 dB attenuation.
12. On the oscilloscope press
and set for 2 V /div vertically
and 200 µs/div.
13. Adjust A1R410 (amplitude)/R425 (bal.) to achieve an output
amplitude of 10 V symmetrical about 0 V.
14. Set the HP 81 12A as follows:
Transition
LEE
TRE
LIMIT
Linear
5.5 ns
5.5 ns
Off
15. Adjust A1R318 (amplitude)/R407 (bal.) to achieve an output
amplitude of 10 V symmetrical about 0 V.
16. Alter HP 81 12A Transition to Gaussian.
17. Adjust A1R418 (amplitude)/R402 (bal.) to achieve an output
amplitude of 10 V symmetrical about 0 V.
18. Set up the HP 81 12A as follows:
DTY
753
Transition
Fixed
HIL
0.5
v
LOL
-0.5
v
LIMIT
Off
19. On the oscilloscope, remove one of the 20 dB attenuators from
input 4 and set the attenuation factor to 10.
20. Press
and set to 200 mV/division , Ext. trigger, pos.
2 1 . Turn A2R46 fully clockwise.
22. Adjust A2R46 (amplitude) / A1R416 (bal.) for a symetrical 1 V
signal.
Summary of Contents for 8112A
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Page 242: ...A R l BD RY MR I N 1 2 7 I I IJt 51 CR1 B e i 1 _ _ _ _ 20 ...
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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 ...
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Page 378: ...Figure B 14 Mechanical Parts 1 B 44 Backdating ...
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