In order to get the full 120fps from the UFG1122 some configuration of the camera is require to achieve this, as default the camera is set as a standard 1080p HD camera.
To set the camera to transmit the higher frame rate you must adjust the profile used by the camera. You will need to set the camera to profile 6 and adjust the TV output option to NTSC. This will now allow the camera to transmit up to the full 120fps.
The profile adjustment can be found in the following menu location:
Setup --> Advance --> Video/Audio --> General