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Chapter 2 Service
About the Agilent 53181A Calibration Menu
About the Agilent 53181A Calibration Menu
If you are familiar with the information provided in this section, proceed to the
NOTE
section titled "The Agilent 53181A Calibration Procedures" (page 2-31) to calibrate
your Counter. This section, "About the Agilent 53181A Calibration Menu," can be
used as a reference.
With the exception of the standard timebase oscillator, no adjustments are required for
NOTE
the Agilent 53181A Counter.
Overview of the Agilent 53181A Calibration Menu
The Calibration menu is accessed by holding the Scale & Offset key and cycling the
POWER
POWER key. All of the calibration factors and security settings are stored in non-
Scale &
volatile memory, and do not change when power has been off or after a remote
Offset
interface reset.
On / Stby
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 53181 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.
The Calibration menu, illustrated on page 2-27, allows you to:
•
•
•
•
Assembly-Level Service Guide
view the calibration security status of the Counter (CAL SECURE or CAL
UNSECURE)
initiate the Counter's calibration routines, which can perform automatic
calibration of the voltage offset and gain of the front-end input amplifiers (CAL:
OFFS 1?, GAIN 1?), of the optional timebase (CAL: TIMEBAS?)
secure against calibration by entering the security code while the Counter is
unsecured (CODE: )
unsecure for calibration by entering the security code while the Counter is
secured (CODE: )
2-25
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