1 Calibration Procedures
66 Keysight U3606B Service Guide
Unsecuring the Instrument for Calibration
Before you can adjust the instrument, you must unsecure it by entering the
correct security code.
The default security code is set to ATU3606B.
Unsecuring the instrument from the front panel
Only four characters (the fourth, fifth, sixth, and seventh characters) of the
security code are used to unsecure the instrument from the front panel. If there
are letters instead of digits in any of the fourth through seventh characters,
those letters will be represented by the numeral “0” from the front panel.
Example 1 Assume that the calibration security code is the factory default
setting of “ATU3606B”. When unsecuring from the front panel, the code length is
four characters and the first three characters (ATU) are ignored.
Use this code to unsecure: 3606
Example 2 Assume that the calibration security code was set to “AT01A234”
from the remote interface. When unsecuring from the front panel, the first three
characters and any characters after (the seventh through twelfth characters) are
ignored. In this example, the code now becomes: 1A23. From the front panel, any
letters (“A” in this example) are represented by the numeral “0”.
Use this code to unsecure: 1023
Example 3 Assume that the calibration security code has been set to
“AB123CD45” from the remote interface. The first three characters (AB1) are
ignored. The numerals “2” and “3” are still used, and the letters “C” and “D” are
represented by zeros.
Use this code to unsecure: 2300
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