The Active Extension connects to the feature port of the RACE RESULT Decoder in order to operate as an active system. 

The Active Extension does not have a screen and it entirely controlled by the decoder. When in use the time base of the decoder is managed by the Active Extension which contains a more precise internal clock. 

The Active Extension can be used with data cables up to 30m in length, allowing the decoder to be positioned further away from the timing point. It can also be used with the Loop Box to receive passings transmitted by repeat mode, or receive passings which were stored on the transponder.