Agilent Technologies AGILENT U2761A Service Manual download pdf (Page 44)

3 Calibration

30 U2761A Service Guide

Calibration Procedure

Calibration is necessary when the one-year calibration

interval has expired, or whenever the U2761A fails any

verification test. To enter the calibration mode, send the

following SCPI command to the U2761A.

CALibration:SECure:STATe OFF,U2761A

Once the calibration state is unsecured, the U2761A is now

in the calibration mode and setup is 0 by default. All the

calibration setup is predetermined and transparent to the

user. The user is free to perform a full calibration setup

from 1 to 115, or may choose to perform only a particular

group. To perform a particular calibration setup, send the

following SCPI command to U2761A.

CALibration:SETup<1|2|3|...|115>

The current calibration setup can be queried using the

following SCPI command when necessary.

CALibration:SETup?

The U2761A will output a predefined waveform at the output

terminal according to the setup number entered. Perform the

measurements as described in “Internal Timebase

Adjustment” on page 31 until “Amplitude Flatness (+20 dB

Range) Adjustment” on page 41, and enter the measured

values to the U2761A using the SCPI commands as follows.

CALibration:VALue <value>

The calibration value must be entered at the magnitude of

the units shown in the configuration tables accordingly. If

the user accidentally enters a wrong value, simply reenter a

correct value under the same calibration setup. Proceed to

the next calibration setup by entering a new setup number

once the calibration value is entered.

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Agilent Technologies AGILENT U2761A Service Manual Page 44