The receiver is connected to com2 of the titan RT and the raven 660 controller is attached to Titan com3. This system works fine for variable rate control. I attempted to output GPS signal from com1 of Titan to lightbar using the afore mentioned cable which required a 9 pin female/female adapter to connect.
As far as settings, I have external lightbar checked comm port set as com1 and on-screen lightbar also checked.
Also in GPS settings / output I have the output NMEA box checked with com1, tried all different baud rates, 8 data bits, none parity and 1 stop bit. No check in the log raw data