HP 4262A Operating And Service Manual page 114

ADJUSTMENT
e. Adjust position control of oscilloscope so that baseline is centered on the CRT.
f. Set oscilloscope input mode to dc.
g. Adjust potentiometer A12R1 until dc level of displayed waveform is OmV
+10mV. Refer to Figure 5-4 which shows well-adjusted waveform.
Figure 5-4. Waveform at A12Q11 Source.
Note
If adjustment is not successful, see Section
VIII service sheet for troubleshooting.
5-23. A13 BOARD OFFSET ADJUSTMENT.
PURPOSE:
This
adjustment
eliminates any residual
dc offset voltage from the A13 Process
Amplifier Board Assembly.
(1)To AI3 TPI
(2)To AI3 TP2
(3) To AI3 TP3 BNC To ALLIGATOR CLIP CABLE
OSCILLOSCOPE
|
i
I o]
|
7/
1
D1y
pw)
Figure 5-5. A13 Board Offset Adjustment.
EQUIPMENT:
Oscilloscope
. ....... ...t HP 180C/w1801A/w1821A
5-9