Calibration Procedures 4
Keysight 34970A/34972A Service Guide 71
Calibration Security
This feature allows you to enter a security code to prevent accidental or
unauthorized adjustments of 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 page 52 in Chapter 3 for a
procedure to enter the security code.
– The security code is set to “HP034970” or “AT034972”, depending on the
product number, when the instrument is shipped from the factory. The security
code is stored in non-volatile memory, and does not change when power has
been off, 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, but the remaining characters can be letters,
numbers, or an underscore ( _ ). You do not have to use all 12 characters but
the first character must always be a letter.
If you forget your security code, you can disable the security feature by adding a
jumper inside the instrument as described on the following page.
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