Agilent Technologies N3970A, Operating And Maintenance Manual

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GETTING STA RTED AND TURNING ON
To disable or enable the buzzer, hold down SHIFT for 3 seconds.
To add the carry strap: slip the end of the strap through the slit
on the curved section at the back of the instrument, and secure
the buckle.
This instrument requires no warm up, and no user adjustment
of dark current to achieve it’s specified performance.
To learn how to use the instrument features, go to the next
section.
Should the instrument fail to turn on, the microprocessor may
need re-booting. To do this, remove batteries and external
power for at least 40 seconds. This will not lose stored data.