Specifications

52 Chapter 4

Preparing for Accurate Measurement

Running the Compensation Process

NOTE You must turn on the calibration function before using it. In other words, when the

calibration function is off, you cannot perform any of the compensation related operations,

including measuring the data for calculating the compensation coefficients, calculating the

compensation coefficients, turning on or off the compensation function, and retrieving or

setting the compensation coefficients. However, you can configure the compensation kit

even when the calibration function is off.

Setting compensation kit values

You can either use the 4287A's predefined compensation kit values or directly enter other

compensation kit values. To choose how the compensation kit values are defined, use the

following command:

• :CORR2:CKIT on page 247

If you opt to enter the values, you need to specify how the compensation kit itself is

defined and then enter the definitions.

Choosing definition method (Fixed or Point-by-Point)

• :CORR2:CKIT:LIST on page 247

Entering definitions

To define the OPEN and SHORT standards, use the commands listed in the following

table:

Measuring data for calculating compensation coefficients

To measure the data for calculating the compensation coefficients, use the following

command:

• :CORR2:COLL on page 252

The command shown above returns the data for calculating the compensation coefficients

for both impedance and R

measurements. If you want to obtain the data for either

impedance or R

measurement alone, use one of the following commands instead:

• :CORR2:COLL:RF on page 254

• :CORR2:COLL:DC on page 253

NOTE Issuing the :CORR2:COLL, :CORR2:COLL:RF, or :CORR2:COLL:DC command

does not trigger the instrument to begin measuring the data. This means that if the trigger

Impedance value R

value

OPEN :CORR2:CKIT:STAN1:LIST on page 249 :CORR2:CKIT:STAN1:DC on page 248

SHORT :CORR2:CKIT:STAN2:LIST on page 251 :CORR2:CKIT:STAN2:DC on page 250