Adjustment Procedures
DPO4000 Series Service Manual 3-3
Factory Adjustment Procedure
Toperform the factory adjustment procedure, do these steps:
1. Connect the oscilloscope to an AC power source.
NOTE. Youmust 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 unsureof the AC pow er circuitdistribution. Connecting the
oscilloscope and testinstruments 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 prov ides access to the CAL switch on
the rearpanel.
CAL
3. Insert the adjustmenttool into the CAL switch hole. Use the tool to push and
hold the CAL switch in while you poweron the oscilloscope. Release the
switch when the oscilloscope shows the power-onmessage with the
oscilloscope graticulein the background.
4. Push theDefault Setup button.
NOTE. Do not skip the recallDefault Setup step. You must recall the factory
settings in orderto correctlystart the factory adjustment procedure.
5. Push theMEN U OFF button.
6. Push theUTILIT Y button.
7. Push theSystem Config lower bezel button repeatedly t o select Calibra-
tion.