HP 33120A, User Manual

Page: 109 / 118

Calibration Overview
This section gives an overview of the calibration features of the function
generator. For a more detailed discussion of the calibration procedures,
see chapter 4 in the
Service Guide .
Calibration Security
This feature allows you to enter a security code to prevent accidental or
unauthorized calibrations of the function generator. When you first
receive your function generator, it is secured. Before you can calibrate
the function generator, you must unsecure it by entering the correct
security code.
•
The security code is set to “HP033120” when the function generator is
shipped from the factory
. The security code is stored in non-volatile
memory, and does not change when power has been off or after a
remote interface reset.
•
To secure the function generator from the remote interface, the
security code may contain up to 12 alphanumeric characters as shown
below. The first character
must be a letter , but the remaining
characters can be letters or numbers. You do not have to use all
12 characters but the first character must always be a letter.
A _ _ _ _ _ _ _ _ _ _ _
(12 characters)
•
To secure the function generator from the remote interface so that it
can be unsecured from the front panel, use the eight-character format
shown below. The first two characters must be “HP” and the
remaining characters must be numbers. Only the last six characters
are recognized from the front panel, but all eight characters are
required.
To unsecure the function generator from the front panel,
omit the “HP” and enter the remaining characters as shown on the
following pages.
H P _ _ _ _ _ _
(8 characters)
Chapter 3 Features and Functions
Calibration Overview
118