4-4
Calibrating and Adjusting
To adjust the power supply
To adjust the power supply
The oscilloscope power supply has +3.4 V adjustment. Other oscilloscope
voltages are based on the +3.4 V adjustment.
In this procedure, you will use a digital multimeter to measure the +3.4 V test
point, and adjust the power supply to be within tolerance, if necessary.
Table 4-1
Equipment Required to Adjust the Power Supply
1
Prepare the oscilloscope for the voltage adjustment.
a Turn off the oscilloscope and disconnect the power cable.
b Remove the oscilloscope cover. For a list of parts, see the “Replaceable
Parts” chapter, then return here.
c Place the oscilloscope on its side.
d Connect the negative lead of the digital multimeter to a ground point on the
oscilloscope chassis.
e Reconnect the power cable.
f Turn on the oscilloscope.
Equipment Critical Specifications Recommended Model/Part
Digital multimeter 0.1 mV resolution, accuracy ±0.05% Agilent 34401A
service.book Page 4 Wednesday, August 28, 2002 3:25 PM
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