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Adjustment Procedures
DPO4000 Series Service M anual
3-3
Factory Adjustment Procedure
To perform the factory adjustment procedure, do these steps:
1. Connect the oscilloscope to an AC power source.
NOTE. You must connect the oscilloscope and the test equipment to the same AC
power circuit. Connect the oscilloscope and test instruments to a common power
strip if you are unsure of the AC power circuit distribution. Connecting the
oscilloscope and test instruments to separate AC power circuits can result in
offset voltages between the equipment, which can invalidate the adjustment
procedure.
2. Locate the hole in the rear panel that provides access to the CAL switch on
the rear panel.
CAL
3. Insert the adjustment tool into the CAL switch hole. Use the tool to push and
hold the CAL switch in while you power on the oscilloscope. Release the
switch when the oscilloscope shows the power-on message with the
oscilloscope graticule in the background.
4. Push the Default Setup button.
NOTE. Do not skip the recall Default Setup step. You must recall the factory
settings in order to correctly start the factory adjustment procedure.
5. Push the MENU OFF button.
6. Push the UTILITY button.
7. Push the System Config lower bezel button repeatedly to select Calibra-
tion.