Specifications

Chapter 4 51
Preparing for Accurate Measurement
Selecting a Test Fixture (Port Extension Compensation)
4. Preparing for Accurate
Measurement
Selecting a Test Fixture (Port Extension Compensation)
Using port extension compensation function
To compensate for the delay due to the test fixture that holds the DUT (port extension
compensation), you must tell the instrument which test fixture is used in your
measurement. This can be done by selecting data for electrical length compensation, which
is predefined and specific to each test fixture. To specify the test fixture, use the following
command:
• :CORR2:FIXT on page 256
NOTE Before running the compensation process, you must specify the fixture or, if using a
custom fixture, set the compensation values for the fixture.
Configuring the instrument to use your custom test fixture
When you use a custom test fixture, you must set the compensation value for the delay due
to the fixture's electrical length. In addtion, you can optionally specify the fixture’s name.
To set the compensation value for the delay due to the fixture's electrical length, use the
following command:
• :CORR2:FIXT:EDEL:DIST on page 257
If you opt to specify the fixture’s name so that it will be shown on the selection screen
when selecting the test fixture, use the following command:
• :CORR2:FIXT:LAB on page 258