Trigger Output - HP 8112A Operating, Programming And Servicing Manual

9-6 Adjustment Procedures
Normal/Complement
6. Set the HP 81 12A Transition to FIXED .
7. Switch the HP 8 1 1 2A 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 (Autoscale) 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
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
Transition
HIL
LOL
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 , Ext . trigger, pos.
2 1 . Turn A2R46 fully clockwise.
22. Adjust A2R46 (amplitude) / A1R416 (bal.) for a symetrical 1 V
signal.
Linear
5.5 ns
5.5 ns
Off
75 3
Fixed
v
0.5
v
-0.5
Off