SIMPLIS Tutorial

4.5  Unlock the Probe Measurement Feature

Starting with the introduction of SIMetrix/SIMPLIS 6.20, any built-in or user defined measurement can be added to the probes on the schematic. Measurements added to the probes are then automatically executed after each simulation run. This feature is available in SIMetrix/SIMPLIS Intro for a time-limited period using the Unlock Features option. The full version of SIMetrix/SIMPLIS has this feature enabled by default.

To unlock the probe measurement feature, follow these steps:

1. In the Command Shell, select Help ▶ Unlock Features....
   Result: The Get Unlock Code window appears.
2. Click the Unlock button.
   Result: A message returns indicating that the feature has been unlocked and that you must restart SIMPLIS.
3. Close and restart SIMetrix/SIMPLIS.

To add fixed probe measurements and further optimize the design, follow these steps after reopening the last schematic from the Command Shell:

1. In the Schematic editor, click on the probe with label VOUT; then right click and select Edit / Add Measurement (or use the keyboard shortcut Ctrl+Alt+F7).
   Result: The Edit Probe Measurements dialog appears.
2. From the Select Measurement drop-down list in the first column, select Mean.
3. Click the Add Measurement button on the right and then select  Peak To Peak as the second measurement.
4. In the fifth column, Display on Schematic, select Yes for both Mean and Peak to Peak.
5. At the bottom of the dialog, click Ok to save the probe measurements.
   
6. In the Schematic editor, select the IL probe, type Ctrl+Alt+F7, and repeat steps 2 and 3 above, and then click Ok.

   Note: Since the default for Display on Schematic is No, no additional changes are needed on the IL probe nor on the SW probe.

7. Return to the Schematic editor, click the SW probe, type Ctrl+Alt+F7, add Minimum and Maximum measurements, and then click Ok.
8. If the graph viewer is open, close it and press F9 to run the simulation.
   Result: The schematic is updated with the VOUT curve measurements, and the graph now appears with the measurements for all three curves. You may have to drag the splitter bar just above the tabs in  the graph viewer to see all the measurements.
   

Tip: If you have several probes which you want to have the same fixed measurements, you can select multiple probes and add the measurements. Your inputs in the Edit Probe Measurements dialog will be applied to each selected probe.

Saving your Schematic

To save your schematic,  follow these steps:

1. Select File ▶ Save As.
2. Navigate to your working directory where you are saving your schematics.
3. Name the file 6_my_buck_converter.sxsch.

A schematic saved at this state can be downloaded here: 6_SIMPLIS_tutorial_buck_converter.sxsch.

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