Agilent Technologies HP 3325B Instrukcja Obsługi Pobierz pdf (Strona 105)

Chapter 2 Service

About the Agilent 53131A/132A Calibration Menu

Assembly-Level Service Guide 2-7

The Calibration menu, illustrated on page 2-8, allows you to:

• 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 / 2 ?, GAIN 1 / 2?), of the optional timebase (CAL: TIMEBAS?), and

of the differences in electrical path-length between channels 1 and 2 (CAL: TI

QUIK? and CAL: TI FINE?)

• 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: )

• change the security code by entering a new code while the Counter is unsecured

(CODE: )

• view the calibration count, which indicates the number of times that the Counter

has been calibrated (CAL COUNT?). The calibration count increments up to a

maximum of 32,767 after which it wraps around to 1. A calibration count of 0

indicates that the Counter is completely uncalibrated. (The calibration count is

unaffected by interpolator calibration.)

•get Help (HELP: ) with any of the following:

– how to calibrate (CAL?),

–how to secure (SECURE?), and

– how to change the code (CODE?)

NOTE A good precaution is to use a GPIB program (see the programming example titled

“To Read and Store Calibration Data” in Chapter 3 of the Programming Guide) to

read and store the calibration factors prior to initiating any calibration.

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Agilent Technologies HP 3325B Instrukcja Obsługi Strona 105