Agilent Technologies Infiniium 90000 A Service Manual page 82

Chapter 4: Troubleshooting
Acquisition/Backplane Assembly Trouble Isolation - Scope Self Tests
Misc. Scope Test Group
• Temp Sensor Test - This test verifies that all of the temperature sensors in the oscilloscope
are reading values within the expected range. Temperature sensors exist for each of the
Hedwig memory controller ICs, each of the ADC ICs, and each of the front end ICs. If any
temperature sensor measure a temperature that is outside of the expected operating range,
a failure will be reported for the IC associated with that temperature sensor.
• Board Level Repair - This test should never fail since the oscilloscope will automatically shut itself
off if it detects an overheating condition. If the test does fail, report the issue to the Infiniium
software team.
• Acq Flash RAM Test - This test checks the flash RAM located on the backplane board and each
acquisition board for errors. If any errors are found, a failure is reported for the particular flash
RAM that was found to be bad.
• Board Level Repair - Replace the flash RAM that is failing the test.
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