Calibration

Calibration Introduction

Calibration Modes
Depending on the measurement mode either Gain or Impedance calibration can be performed.

Measurement Mode	Calibration Mode
S21	Gain
GainPhase	Gain
Impedance One Port	Impedance
Impedance Adapter	Impedance
Impedance External Bridge	Impedance
S11 One Port	Impedance
S11 External Coupler	Impedance
Impedance Voltage Current Gain	Multi Mode (Thru or Open, Short, Load)
Impedance Shunt Thru	Multi Mode (Thru or Open, Short, Load)
Impedance Series Thru	Multi Mode (Thru or Open, Short, Load)

Full / User Range

The Full Range Calibration calibrates over the full frequency range while user range calibrates the Bode 100 in a user defined range.

The Full Range Calibration calibrates over the full frequency range of the Bode 100 at predefined frequency points.
Calibration values between these frequency points are calculated by linear interpolation.
Advantage:
Measurement frequency points can be changed without loosing the calibration.

The User Range calibration calibrates exactly at frequency points currently configured in the measurement.
Therefore a measurement has to be configured before a User Range calibration can be performed.
Advantage:
No interpolation is needed.

Note

Changing the measurement frequencies will reject the User Range Calibration.

Calibration Examples

1. Gain Thru Calibration
2. Impedance Open Short Load Calibration
3. Load Save Calibration From File

Note

The following examples are written in C#.

Gain Thru Calibration

1. Initialize a S21 Measurement Mode

   BodeAutomationInterface auto = new BodeAutomation();
   BodeDevice bode = auto.Connect();
   S21Measurement s21Measurement = bode.Transmission.CreateS21Measurement();
   

2. Perform User Range Calibration

   //After configuring measurement you can execute the user calibration
   s21Measurement.ConfigureSweep(100, 200000, 201, SweepMode.Linear);
   ExecutionState state = s21Measurement.Calibration.UserRange.ExecuteThru();
   

3. Or perform Full Range Calibration

   //After configuring measurement you can execute the full calibration
   ExecutionState state = s21Measurement.Calibration.FullRange.ExecuteThru();
   

4. Check if the User Range calibration is active

   //Check if the calibration is active.
   if(!s21Measurement.Calibration.UserRange.IsActive)
   {
       //Something strange happened.
       return;
   }
   

Impedance Open Short Load Calibration

1. Initialize a measurement

   BodeAutomationInterface auto = new BodeAutomation();
   BodeDevice bode = auto.Connect();
   OnePortMeasurement onePortMeasurement = bode.Impedance.CreateOnePortMeasurement();
   

2. Perform User Range Calibrations

   onePortMeasurement.ConfigureSweep(100, 200000, 201, SweepMode.Linear);
   //Open Calibration
   ExecutionState state = onePortMeasurement.Calibration.UserRange.ExecuteOpen();
   //Short Calibration
   ExecutionState state = onePortMeasurement.Calibration.UserRange.ExecuteShort();
   //Load Calibration
   ExecutionState state = onePortMeasurement.Calibration.UserRange.ExecuteLoad();
   

3. Perform Full Range Calibrations

   //Open Calibration
   ExecutionState state = onePortMeasurement.Calibration.FullRange.ExecuteOpen();
   //Short Calibration
   ExecutionState state = onePortMeasurement.Calibration.FullRange.ExecuteShort();
   //Load Calibration
   ExecutionState state = onePortMeasurement.Calibration.FullRange.ExecuteLoad();
   

4. Check if the Full Range calibration is active

   //Check if the calibration is active.
   if(!onePortMeasurement.Calibration.FullRange.IsActive)
   {
       //Something strange happened.
       return;
   }
   

Load Save Calibration From File

You can either save the calibration in an external file like demonstrated in this example or keep it in memory during runtime. When saving in a file the Calibration will be saved as a ".mcalx" file.
A calibration will only be loaded if the configured measurement points and the measurement points from the calibration file match. The Load and Save functions are returning true or false, indicating if the process was successful or not.

Note

The extension ".mcalx" is required when calibration files are saved or loaded.

Example:

1. Perform User Range Calibration

   BodeAutomationInterface auto = new BodeAutomation();
   BodeDevice bode = auto.Connect();
   S21Measurement s21Measurement = bode.Transmission.CreateS21Measurement();
   s21Measurement.ConfigureSweep(100, 200000, 201, SweepMode.Linear);
   
   ExecutionState state = s21Measurement.Calibration.UserRange.ExecuteThru();
   

2. Save Calibration

   //Save the calibration to a file called "myCalibration"
   if(!s21Measurement.Calibration.SaveCalibration("myCalibration.mcalx"))
   {
       //Error
       return;
   }
   

3. Load User Range Calibration

   //Load the user range calibration from the external file called "myCalibration"
   if(!s21Measurement.Calibration.UserRange.LoadCalibration("myCalibration.mcalx"))
   {
       //Error
       return;
    }