Analyze > Select Input/Output Points lets you choose the input and output reference points for linearization. If you don’t choose reference points, arbitrary points are chosen when the system is linearized. Unless you’re linearizing a SISO (single input/single output) system, you should use Select Input/Output Points to ensure that the proper input and output points are selected.
Alternate way to select reference points: You can also select reference points with Analyze > Linearize.
To select reference points
1. Choose Analyze > Select Input/Output Points.
2. To select an input reference point, click the output connector on the block that produces the signal with which you want to linearize the system.
The output connector changes color. If the connector you select is invalid, you hear a beep.
3. To select an output reference point, click the input connector on the block that consumes the signal against which you want to linearize.
The input connector changes color. If the connector you select is invalid, you hear a beep.
4. Click over empty screen to exit this mode.
To cancel a reference point selection
1. Choose Analyze > Select Input/Output Points.
2. Right-click over the selected connector.
3. Click over empty screen to exit this mode.