User's Manual
Table Of Contents
- Title page
- Contents
- 1 General Information
- 2 Preparing the Oscilloscope for Use
- 3 Testing Performance
- List of Test Equipment
- To construct the test connector
- To test the 54621D/22D Oscilloscope digital channels
- To verify digital channel threshold accuracy
- To verify voltage measurement accuracy
- To verify bandwidth
- To verify horizontal Dt and 1/Dt accuracy
- To verify trigger sensitivity
- Agilent 54622A/22D/24A Performance Test Record
- Agilent 54621A/21D Performance Test Record
- 4 Calibrating and Adjusting
- 5 Troubleshooting
- 6 Replacing Assemblies
- 7 Replaceable Parts
- Declaration of Conformity
- Notices
5-13
Troubleshooting
To run the internal self-tests
To run the internal self-tests
Self Test performs a series of internal procedures to verify that the oscilloscope
and any attached module are operating properly.
It is recommended that you run the Self Test:
• after experiencing abnormal operation
• for additional information to better describe an oscilloscope failure
• to verify proper operation after the oscilloscope has been repaired
Successfully passing Self Test does not guarantee 100% of the oscilloscope’s
functionality. Self Test is designed to provide an 80% confidence level that the
oscilloscope is operating properly.
1
Press the Utility key, then press the Service softkey.
2 Begin the internal self tests by pressing the Self Test softkey.
a The oscilloscope will display the message “Running self tests” on the screen.
b The oscilloscope will then display one of the following messages on the
screen indicating the status of the self-tests:
• Self Tests Passed.
• Self Tests Failed.
service.book Page 13 Wednesday, December 18, 2002 8:35 AM