Tektronix 4000 Series, Руководство по обслуживанию

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Adjustment Procedures
3- 4
Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual
Factory Adjustment Procedure
To perform the factory adjustment procedure, complete 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. Power on the oscilloscope and warm it up for 30 minutes.
3. Power on the oscilloscope calibrator and warm it up for 30 minutes.
4. Connect the active heads from the calibrator to the oscilloscope, ensuring
that Channel 1 on the calibrator connects to Channel 1 on the oscilloscope,
and so on.
NOTE
. For the DPO4000, there will be either 2 or 4 channels to connect. For the
MSO4000, there will be either 2 or 4 channels to connect, plus an additional
channel connection for the digital probe. Plug the digital probe into the
Channel 5 active head on the calibrator, but do not plug the probe into the
oscilloscope until you begin a Deskew test.
5. Power off the oscilloscope. Locate the hole in the rear panel that provides
access to the CAL switch, as shown in Figure 3--1.
CAL
Figure 3- 1: Rear panel