Acknowledge the SAL command from Rotator PXI. This will let the CSC know the status of SAL command.
Note. It looks like I may need to use sync pattern to identify the command comes from the DDS or GUI. Only the CSC needs the command acknowledgement. In addition, in the future, the GUI specific code will be deprecated. There should be no difference between the GUI and CSC code at that time. In this case, I may need to update the GUI code to use another sync pattern value instead.
Note. I do need to change the GUI for sync pattern.