I am currently building an ROV that utilizes 8 motors and thus all 8 of the main out pins on the pixhawk. Because of this I chose to connect the camera pan servo to the AUX 1 pin. However, I am having trouble configuring QGC to operate the camera gimbal servo.
Take a look at the Camera tab of the Vehicle Setup page. For tilt configuration, the input channel should remain channel 8 and the output channel should be set to channel 9 (aux1)
Thanks for the quick reply! I tried exactly what you described and I have also been over the camera setup section in depth and I have had no luck with the camera tilt. I also tried setting the MNT_JSTCK_SPEED parameter to 100. Still no luck.