When control unit loses power, must instruct unit to apply low pass filter to prevent feedback, as follows:

1. COM2 from PC is connected to RS232 input on control unit through a null modem cable
   
   
2. Start TERMINAL. Choose settings-> communications. Select COM2, 19200 baud, 8 bits, 1 stop bit, no parity.
   
   
3. Hit "return" or "escape" on terminal a few times to get main menu.
   
   
4. Hit "0" to enter system menu
   
   
5. Choose diagnostic menu
   
   
6. Choose custom filter design
   
   
7. Hit "0" to select an axis/stage
   
   
8. Select stage 6
   
   
9. Hit "1" to select filter type
   
   
10. Choose LPF10
    
    
11. Hit "2" to select parameter 1
    
12. Enter 20 for this parameter
    
13. Hit 6 to update all axes, answer "y" to update all