Performance Tests and Calibration
6
Keysight U1211A, U1212A, and U1213A User’s and Service Guide
97
Calibration Security
A calibration security code is in place to prevent accidental or unauthorized
adjustments to the instrument. When you first receive your instrument, it is
secured. Before you can adjust the instrument, you must “unsecure” it by entering
the correct security code (see
“Unsecuring the instrument for calibration”
page 97).
The security code is set as 1234 when the instrument is shipped from the factory.
The security code is stored in non-volatile memory, which does not change even
when the power is off.
The security code may contain up to 4 numeric characters.
Unsecuring the instrument for calibration
Before you can adjust the instrument, you must unsecure it by entering the
correct security code. The security code is set to 1234 when the instrument is
shipped from the factory. The security code is stored in non-volatile memory, and
does not change when the power is turned off.
NOTE
You can unsecure the instrument and then change the security code from the
front panel or through the remote interface.
NOTE
See
“Resetting the security code to factory default”
on page 99 if you forget your
security code.
NOTE
See
64 for the directional button operations to be used in the
subsequent procedures below.
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