Specifications

74 Chapter 4

Preparation for Accurate Measurement

Calibration

To assure accurate measurements, calibration must be performed on the DUT port on the

test head. In the Dielectric Material measurement mode, calibration should be performed

on the surface of the test fixture that makes contact with the DUT. The following section

explains how to perform calibration.

Define Calibration Kit

Selection

Use the following GPIB command to select whether the 7-mm calibration kit included with

the E4991A or a user-defined calibration kit is used for calibration.

• SENS:CORR1:CKIT on page 420

How to Enter Standard Values for User-Defined Calibration Kit

When a user-defined calibration kit is used to perform calibration, use the following GPIB

command to select whether the Open/Short/Load standard values are set to a single value

or different values for each frequency.

• SENS:CORR1:CKIT:LIST on page 421

Standard Value for User-Defined Calibration Kit (Single Value)

Use the following GPIB commands to define the Open/Short/Load standard values as a

single value common to each frequency.

Standard Value Array for User-Defined Calibration Kit (Frequency)

By defining the Open/Short/Load standard values of the calibration kit as an array for each

frequency, errors due to frequency characteristics of the Open/Short/Load standard can be

removed. Use the following GPIB commands to define standard values as an array for each

frequency.

Standard Parameter GPIB command

Open Conductance value (G) SENS:CORR1:CKIT:STAN1:G on page 423

Capacitance value (C) SENS:CORR1:CKIT:STAN1:C on page 422

Short Resistance value (R) SENS:CORR1:CKIT:STAN2:R on page 429

Inductance value (L) SENS:CORR1:CKIT:STAN2:L on page 426

Load Resistance value (R) SENS:CORR1:CKIT:STAN3:R on page 433

Inductance value (L) SENS:CORR1:CKIT:STAN3:L on page 430

Standard Parameter GPIB command

Open Conductance value (G) SENS:CORR1:CKIT:STAN1:LIST:G on page 425

Susceptance value (B) SENS:CORR1:CKIT:STAN1:LIST:B on page 424

Short Resistance value (R) SENS:CORR1:CKIT:STAN2:LIST:R on page 427

Reactance value (X) SENS:CORR1:CKIT:STAN2:LIST:X on page 428

Load Resistance value (R) SENS:CORR1:CKIT:STAN3:LIST:R on page 431

Reactance value (X) SENS:CORR1:CKIT:STAN3:LIST:X on page 432