The FS700 is not capable of outputting 4K100p continuously. It is too much data to fit through the pipe. So it loads it into an internal memory buffer and then plays it out at a speed it can handle, 50p (for 100p material) or 60p (for 120p material). The memory can store 440 frames of 4K RAW.
This is how the Sony recorder solution works as well.
So when I'm in Pal mode. I switch the FS700 to 100fps @ 4k. If I use the trigger on the 7Q, am I just recording 50p footage? It plays back in slow mo and I recorded a clip that was about 90 sec on play back. It says on the 7Q that it was a 100p input in a 50p wrapper. So should we only be using the trigger from the camera to record HFR 4k?