PSD Cross Correlation

Vibration -> Build -> Input Channel -> Modify -> Cross Correlation
Define the parameters for PSD cross correlation. 
 
For the option:
Do the following:
Actuators
Enter the name of the PSD actuator you want to use.
Input Channels
Enter the name of the input channel that you want to correlate to the PSD actuator.
More
Select if you want to insert new combinations of actuators and input channels.
Fewer
Select if you want to delete the last row of actuator/input channel associations.