Sony FX 6 Quick Start Manual page 146

S and Q: frame rates
In 4K, you can set the frame rate between 1 fps (frames per second) to 120 fps
(there is a 10 percent image crop at 120 fps).
In HD, you can set the frame rate up to 240 fps in HD but there is some image
quality loss above 120 fps.
There are two frame rates to set (see images on next page):
1. the base frame rate that the clip is played back at: this is the
Frequency/Scan rate on status page 1. This should be the frame rate of your
project: typically NTSC rates of 23.98p or 29.97p or the DCI rate of 24p.
2. The S & Q frame rate set in Menu/Shooting/S and Q Motion. This is the
number of frames per second that the camera will be recording.