Overshoot Transition Time Adjustment - HP 8112A Operating, Programming And Servicing Manual

&
Overshoot
Transition Time
Adjustment
Equipment
Procedure
•
Oscilloscope (HP 54121T) .
•
Attenuator 20 dB (3 x ) .
1 . Set up the HP 8 1 12A as follows:
Trigger Mode
Control Mode
PER
DEL
DTY
Transition
LEE
TRE
HIL
LOL
COMPL
DISABLE
LIMIT
2. Connect the HP 8 1 12A main output to the oscilloscope input 4,
via two 20 dB attenuators ( 40 dB ) .
3. Connect the H P 8 1 12A trigger output t o the oscilloscope trigger
input via 20 dB attenuation.
4. Press (Autoscale ) .
5. Adjust A1R535 to give best slope linearity in both COMPL off
(=Norm) and COMPL on modes.
6. Set the HP 8 1 12A as follows :
LEE
TRE
7. Set the oscilloscope as follows:
a. Full screen display (center one pulse horizontally and
vertically on the screen) .
b . Number o f averages to 64.
c. Attenuation factor to 100.
d. Select the
e. Set VARIABLE LEVELS = 95 - 1053 and press the Auto
Level Set .
f. Center the pulse top vertically (offset = 8 V).
g. Set V /div to 500 mV.
8. Adjust A1 C530 for overshoot
modes.
NORM
Off
200 ns
65 ns
503
Linear
15.5 ns
15.5 ns
8 V
v
- 8
Off
Off (=Enable)
Off
5.5 ns
5.5 ns
and turn the voltage markers on.
53 in normal and complement
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Adjustment Procedures 9-7