Agilent Technologies 54835A, Руководство по обслуживанию, Страница: 76 / 208

Chapter 4: Calibrating and Adjusting
To run the self calibration
4–10
To run the self calibration
The self calibration uses signals generated in the oscilloscope to calibrate channel sensitivity,
offsets, and trigger parameters. You should run the self calibration
• yearly, or according to your periodic needs,
• when you adjust or replace the acquisition assembly or acquisition hybrids,
• when you replace the hard drive or any other assembly,
• when the delta temperature is more than
±
5
°
C different than the last calibration, or
• after performing incoming performance verification and before performing outgoing
performance verification.
Equipment Required
self calibration
1
Enable the graphical interface.
2
Select Calibration from the Utilities menu.
3
If the Cal Memory Protect box in the Calibration dialog is checked, click the check box
to clear the check mark.
See figure 4-4.
Equipment Critical Specifications Recommended Model/Part
Cable BNC 50
Ω
9 inch Agilent 10502A
Let the Oscilloscope Warm Up Before Running the Self Calibration
The self calibration should only be done after the oscilloscope has run for one half hour at ambient
temperature with the cover installed. Calibration of an oscilloscope that has not warmed up may result in
performance test failure.
Calibration time
It will take approximately 45 minutes to run the self calibration on the oscilloscope, including the time
required to change cables from channel to channel.