The SFRA GUI connects to the device. A SFRA sweep can now be started by clicking Start Sweep. The complete SFRA sweep takes a few minutes to finish. Activity can be monitored by seeing the progress bar on the SFRA GUI and checking the flashing of blue LED on the back on the control card that indicates UART activity. Once complete, a graph with the open loop plot appears, as seen in Figure 3-29. This action verifies that the designed compensator is indeed stable.
The frequency response data is also saved in the project folder under an SFRA data folder and is time stamped with the time of the SFRA run.
Note the measured gain and phase margin are close to the modeled values, as shown in Figure 2-12 .