User`s guide

Chapter 4 63
Performing a Calibration
Calibration
4. Performing a Calibration
Using ECal
An ECal (Electronic Calibration) module allows you to perform full 1/2-port calibration
and response (THRU) calibration without having to replacing the standard device.
ECal works by using the calibration kit data contained in the ECal module, instead of the
calibration kit data selected on the part of the E5061A/E5062A. This means that you do not
have to define or select a calibration kit when using ECal.
NOTE When two or more ECal modules are connected through the USB port, the system uses the
calibration kit data contained in the first ECal module.
To perform ECal, use the following command:
Simply issuing one of the above commands completes all the tasks necessary for error
correction, including measuring the calibration data, calculating the calibration
coefficients, and running on the Error Correction feature.
You can control whether to perform isolation measurement during ECal. To turn on or off
isolation measurement, use the following command:
• :SENS{1-4}:CORR:COLL:ECAL:ISOL on page 395
NOTE If the ECal module does not support isolation measurement, the system never performs
isolation measurement.
Checking the Applied Calibration Type
When you turn on Error Correction, you can check the calibration type actually applied to
each trace. To check the calibration type, use the following command:
• :SENS{1-4}:CORR:TYPE{1-4}? on page 413
NOTE The above command reads out the same parameter (SOLT3) for both the full 3 port and the
simplified full 3-port and therefore they cannot be discriminated. For the same reason, the
full 4 port and the simplified full 4 port cannot be discriminated.
Calibration type Command
Full 1-Port Calibration :SENS{1-4}:CORR:COLL:ECAL:SOLT1 on page 397
Full 2-Port Calibration :SENS{1-4}:CORR:COLL:ECAL:SOLT2 on page 397
Enhanced Response Calibration :SENS{1-4}:CORR:COLL:ECAL:ERES on page 395
Response Calibration (THRU) :SENS{1-4}:CORR:COLL:ECAL:THRU on page 398