HP 8112A Operating, Programming And Servicing Manual page 154

Warning
Procedure
Overshoot/ A1C409
Transition
Times
A1C414
A1C501
A1C502
A 1C528
A1C532
A1C535
A1C541
Timing
Period
A 1C200
A1R2 1 1
A2VR2
and
A2R62
A2R2
A2R53
9-2 Adjustment Proc�dures
Always carry out an adjustment procedure completely and in the
order in which it is presented.
If the HP 81 12A is very badly out of adjustment , turn A 1 R4 1 3 fully
clockwise and all other adjustment potentiometers to their mid
position. Then carry out
Some of the adjustment procedures may require components to be
changed. These components are summarised in Table 9- 1 .
Do not change a component while power is connected to the
0
instrument.
Figure 9-8 and Figure 9-9 at the end of the chapter show the
locations of all the adjustment points in the instrument .
Table 9-1. Adjustment Procedures - Changeable Components
Reference Range
0 pF (open) - 3.3 pF Increasing the value decreases transition times and
as used
27 pF
120 pF
1.5 pF
0 pF (ope n) - 33 pF Increasing C352 decreases transition times and
47 pF
0.01 pF
22 pF
2 15n
open or 4.3 V
open or 5 1 . 1 kn
3.83 kn
3.83 kn
the adjustment procedures.
all
Description
increases overshoot in Fixed mode
Increasing C414 decreases overshoot at amplitudes
� 14 v
Pulse performance at ampl. 0.1 V - 0.99 V
Pulse performance at ampl. 1 V - 9.99 V
Pulse shape
decreases overshoot in Fixed and Linear mode
Pulse shape
Pulse shape
Range capacitor
Bias adjustment
Both influence linearity of
Period Generator
used to get A2R4 (PER 1 ms Adj .) to it's mid
range
used to get A2R3 (PER 20 ms Adj .) to it's mid
range