SPX-10 with ST6001 Control Head

[bradleyj]

I just installed a new old-stock SPX-10 course computer as an upgrade to the S1G computer in my existing Raymarine autopilot system consisting of a ST6001 control head (which I have read in these forums should be compatible with the SPX-10), fluxgate compass, and hydraulic pump to eliminate the need for a rudder position sensor which has frequently caused me problems. The system was working perfectly before I installed the SPX-10. Installation was plug and play. Remove the S1G computer, connect 12V power, 12V output to the pump, inputs from the fluxgate compass, and Seatalk network connection from the control head to the SPX-10. When I power the system up, the control head displays the message "NO PILOT". I verified the 12V power supply to the computer and the Seatalk connection was working before the switch from the S1G to the SPX-10, so I'm thinking this is a problem with the SPX-10. All fuses are good. I read through the setup manual for the ST-6001 and I can't see any setup parameter that it looks like I need to change for the SPX-10, but of course the SPX-10 wasn't available yet when the ST6001 manual was written?

Could you please verify that the ST6001 is compatible with the SPX-10? Is there anything else with this installation that you recommend I check? What should I be seeing for voltage at the Seatalk terminals?