2-port TRL Calibration

• Overview

• Procedure

Other topics about TRL Calibration

Overview

The 2-port TRL calibration function lets you measure calibration data by connecting thru, reflection (open or short), line, or match calibration standards to (between) 2 desired test ports. This calibration provides the most accurate measurement for non-coaxial parts, using 12 error terms model in total for calibration in the same way as full 2-port calibration.

Before executing TRL calibration, you need to modify the calibration kit definition you use (or create a new one). For more information, see Changing the Calibration Kit Definition.

Procedure

1. Press Channel Next/Channel Prev keys to select the channel for which you want to perform the calibration.

2. Press Cal key.

3. Click Calibrate > 2-Port TRL Cal.

4. Click Select Ports, then select the test ports for which you want to execute TRL 2-port calibration. (In the following procedure, test ports you select here are expressed as test ports x and y.)

5. Connect the port.

Thru/Line

1. Make a THRU or Line connection between ports x and y (between the connectors to which the DUT is to be connected).

2. Click  Thru/Line.

3. Click Port x-y Thru to execute a Thru/Line measurement.

4. Click Return.

Reflection

1. Click   Reflect

2. Click Port x Reflect to execute a reflection calibration for test port x.

3. Click Port y Reflect to execute a reflection calibration for test port y.

4. Click Return.

Line/Match

1. Click Line/Match.

2. Click softkey to execute Line/Match calibration.

   Softkey	Function
   x-y Line/Match	Executes line/match calibration for test ports x and y. Use this to perform forward-direction measurement and reverse-direction measurement at the same time. This is equivalent to measuring both x-y Fwd (Syx) and x-y Rvs (Sxy).
   x-y Fwd (Syx)	Executes line/match calibration for test ports x and y. Use this to perform forward-direction measurement only.
   x-y Rvs (Sxy)	Executes line/match calibration for test ports x and y. Use this to perform reverse-direction measurement only.

    

3. Click Return.

4. Click Done to finish TRL 2-port calibration. At this point, the calibration coefficient is calculated and saved. The error correction function is automatically turned on.