Performance Tests and Calibration 4
34405A User’s and Service Guide 87
Calibration Security
The calibration security code prevents 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” on page 88).
The security code is set to AT34405 when the instrument is
shipped from the factory. The security code is stored in
non- volatile memory, and does not change when power is
turned off or after a Factory Reset (*RST command) or after
an Instrument Preset (SYSTem:PRESet command).
The security code may contain up to 12 alphanumeric
characters. The first character must be a letter. The
remaining characters can be letters or numbers. You do not
have to use all 12 characters.
NOTE
You can unsecure the instrument from the front panel, but you cannot
enter a new security code or change the security code from the front
panel. The security code can only be changed from the remote interface
after the instrument has been unsecured. Refer to the CAL:SEC:CODE
command in the 34405A Programmer's Reference Help File for more
details.
34405A users guide.book Page 87 Saturday, September 2, 2006 3:38 PM
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