Fixture Tab

Selecting the Hardware Configuration > Fixture tab opens the following dialog. This dialog box configures various settings in the PD1500A Test Fixture.

Shunt Settings

  • Source Shunt Value: Enter value, in Ohms, of the Coaxial Shunt Resistor. This value is printed on the shunt label. The default/nominal value for the Keysight PD1000-61901 Shunt is 0.01 W.

  • Use High-Z Input (checkbox): Leave the box unchecked when using the Coaxial Current Shunt with the PD1000-60002 Oscilloscope Protection Probe. Check the box if you are not using the PD1000-60002 Oscilloscope Protection Probe and the top of the Coaxial Shunt connects directly to the oscilloscope (High Z input).

  • De-embedding File Name: Enter the de-embedding file name. For example, MY584xxxx.tf2 (where “xxxx” is the shunt’s serial number). The file should be installed in the DSOS104A oscilloscope in the folder: C:\Users\Public\Public Documents\Infiniium\Filters.

    On the Oscilloscope, the file path will show as:

    C:\Users\Public\Public Documents\Infiniium\Filters. However, this is an alias path. Use the path: C:\Users\Public\Documents\Infiniium\Filters in the Shunt Settings De-embedding File path in the Control Software.

Inductor Settings

With software version 2020.820 and later you have the option to use the standard, internal inductor (internal to the PD1500A Test Fixture) or an external, custom inductor. To use the internal inductor, leave the checkbox unchecked. If you choose to use an external inductor, check the Use Custom Inductor checkbox and enter the value of the inductor, in microHenrys (mH), in the Custom Inductor Value field. Recommended range of inductors is from 16.7 mH to 120 mH.

When using an external inductor, the internal inductor must be disconnected. Automatic switching between standard double-pulse test and reverse recovery test is not be possible with an external inductor.

For more information, see External Inductor.

Temperature Control Settings

See Using the Optional Device (DUT) Heater and Thermocouple for a detailed description about using the device heater with the Double-Pulse Test Control Software.

  • Tolerance: Specify a range (±) around the specified temperature for triggering the DPT measurement. For example, if you specify making a DPT measurement at 50 °C and a 1 °C Tolerance, then the measurement is triggered somewhere between 49 °C and 51 °C.

  • Settling Time: Specify a time period (in seconds) to wait after the DUT reaches the specified temperature (withing the specified range) before triggering the DPT measurement.

  • Temperature Control Timeout: Specify the maximum time period (in seconds) to wait for the device to reach the specified temperature before triggering the measurement. If the device does not reach the specified temperature within this time period, the DPT test aborts.

    For example, to go from ambient temperature (~25 °C) to 100 °C with a

    2 °C Tolerance may take up to 60 seconds.To go from Ambient to 100 °C with a 1 °C Tolerance may take up to 90 seconds.

    For more information on using the device heater, see Using the Optional Device (DUT) Heater and Thermocouple.