Instruction manual

Chapter 2 Service
About the Agilent 53131A/132A Calibration Menu
2-6 Assembly-Level Service Guide
2
About the Agilent 53131A/132A Calibration Menu
NOTE If you are familiar with the information provided in this section, proceed to the
section titled “The Agilent 53131A/132A Calibration Procedures” on page 2-15 to
calibrate your Counter. This section, “About the Agilent 53131A/132A Calibration
Menu,” can be used as a reference.
NOTE With the exception of the standard timebase oscillator, no adjustments are required for
the Agilent 53131A/132A Counter.
Overview of the Agilent 53131A/132A Calibration Menu
The Calibration menu is accessed by holding the Scale & Offset key and cycling the
POWER key. All of the calibration factors and security settings are stored in non-
volatile memory, and do not change when power has been off or after a remote
interface reset.
A calibration security code feature allows you to enter a security code (electronic key)
to prevent accidental or unauthorized calibrations of the Counter. The security code is
set to 53131 or 53132 (corresponding to the model) when the Counter is shipped from
the factory. If you forget your security code, you can reset the security code to the
model-number default by resetting all of the non-volatile memory to a default state
(Contact Agilent Technologies for this confidential procedure).
NOTE This menu does not exist in early versions of the Counter. In the early versions
(firmware revisions 3317, 3335, and 3402) of the Agilent 53131A/132A, the CAL:
menu item resides in the Utility menu, and there is no calibration security
capability. See Chapter 6, “Backdating,” in this guide for the correct calibration
procedures.
Scale &
Offset
On / Stby
POWER