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Service
Adjusting the Oscilloscope
To adjust the power supply
On the power supply there is only one adjustment and that is for the +5.1 V.
The other voltages are based on the +5.1 V adjustment. In this procedure
you use a multimeter to measure the +5.1 V, and if necessary, you adjust the
supply to within tolerance.
Table 4-12
Equipment Required
Equipment
Digital multimeter
Set up the oscilloscope for the voltage adjustment.
1
a
b
c
d
e
4–28
Critical specifications
0.1 mV resolution, accuracy ±0.05%
Turn off the oscilloscope and disconnect the power cord.
Remove the cover from the oscilloscope.
Place the oscilloscope on its side.
Connect the negative lead of the digital multimeter to a ground point
on the oscilloscope.
Reconnect the power cord and turn on the oscilloscope.
Recommended Model/Part
HP 34401A
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