Fanatec Clubsport Pedals V1 Manual Better
The manual describes a system where the hydraulic cylinder creates a "progressive" feel. However, the V1 is infamous among veterans for a specific quirk: Because the hydraulic cylinder was not a perfect seal, and because the pressure was translated into a signal via a pressure snubber, the brake would often feel "springy" or require re-calibration as temperatures changed.
If you're looking for a more comprehensive guide or tutorials on setting up and using your pedals, you can try: fanatec clubsport pedals v1 manual better