Normal/Complement; Amplitude/Offset - HP 8112A Operating, Programming And Servicing Manual

9-6 Adjustment Procedures

Normal/Complement

6. Set the HP 8112A Transition to FIXED.
7. Switch the HP 8112A COMPL on and off.
8. Adjust AlR403 for same HIL and LOL on the screen in both
modes.

Amplitude/Offset

9. Set the HP 8112A Transition to FIXED.
10. Set the HP 8112A output to COMPL off.
11. Connect the HP 8112A trigger output to the oscilloscope trigger
input via 20 dB attenuation.
12. On the oscilloscope press (Autoscale] and <set for 2 V/div vertically
and 200 ps/div.
13. Adjust AlR410 (amplitude)/R425
amplitude of 10 V symmetrical about 0 V.
14. Set the HP 8112A as follows:
Transition
LEE
T R E
LIMIT
15. Adjust AlR318 (amplitude)/R407
amplitude of 10 V symmetrical about 0 V.
16. Alter HP 8112A Transition to Gaussian.
17. Adjust AlR418 (amplitude)/R402
amplitude of 10 V symmetrical about 0 V.
18. Set up the HP 8112A as follows:
D T Y
Transition
HIL
LIMIT
19. On the oscilloscope, remove one of the 20 dB attenuators from
input 4 and set the attenuation factor to 10.
20. Press [Autoscale) and set to 200 mV/division,
21. Turn A2R46 fully clockwise.
22. Adjust A2R46 (amplitude) / AlR416 (bal.) for a symetrical 1 V
signal.
(bal.) to achieve an output
Linear
5.5 ns
5.5 ns
Off
(bal.) to achieve an output
(bal.) to achieve an output
75%
Fixed
0.5 v
-0.5 v
Off
Ext. trigger, pos.