Agilent Technologies 1660A Series User Reference page 401

To exit the tests, press the System key, then select Exit Test in the
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pop-up menu and press the select key. Reinstall the disk containing
the operating system, then select Exit Test System and press the
select key.
If you are performing the self-tests as part of the troubleshooting flowchart,
return to the flowchart.
Operator's Service
To run the self-tests (1664A)
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