Tektronix DPO3000 Series, Руководство по обслуживанию

Страница: 32 / 79

Adjustment Procedures
NOTE.
The oscilloscope screen will not provide you with all of the information
that you need to complete the steps successfully, so it is critical that you follow the
steps outlined in the Completing the Procedure section. Each time a new prompt
appears, refer to the table above to identify the signal type, and then ensure that
you are following every step that is outlined for that speci
fi c signal type.
14. Continue with the adjustment process until it is complete and you receive the
Pass noti fi cation. You can cancel the process at any time by pushing the
MENU OFF button.
15. Complete the performance veri fi cation tests to verify that the adjustment
procedure has correctly calibrated the oscilloscope. (See the MSO3000
and DPO3000 Series Speci fi cation and Performance Veri fi cation Technical
Reference .) Incorrect use of calibration equipment can cause the oscilloscope
to pass the Calibration Procedure but fail Performance Veri fi cation.
Completing the Procedure
Instructions follow for completing the DC Voltage, Time Mark, Deskew, and Sine
Signal tests. For each step in the calibration procedure, start at the beginning of the
numbered instructions for the speci
fi c test type, and carefully complete each step.
If the oscilloscope fails a step, consult the Troubleshooting section at the end of
this chapter, revert to the previous step and try again. If the step fails again, return
to the
fi rst step in the calibration procedure and try the entire procedure again.
If the procedure fails, there could be problem with the oscilloscope. Consider
seeking customer support.
DC Voltage The DC Voltage test is the fi rst test to appear on the prompts, and it usually makes
up the majority of the calibration procedure tests. For each DC Voltage test,
complete all 8 steps listed below to best ensure that the test will pass.
1. Push the DC/Square button.
2. Push the WAVEFORM lower-bezel button, and then push the DC Positive
right-bezel button.
3. Push the CHANNEL SELECT lower-bezel button.
4. Push the LOAD lower-bezel button to highlight either 1M Ω or 50 M Ω .
5. Select the speci fi ed channels, by using the side-bezel buttons, and then click
the EXIT lower-bezel button.
6. If the amplitude fi eld is not selected, use the front panel scroll buttons. Type
the speci fi ed voltage, and then push the appropriate unit in the right-bezel
menu.
3–6 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual