Sennheiser AB 3-GB
The Sennheiser AB 3-GB is an active antenna booster module with +10 dB gain and 42 MHz bandwidth (606-648 MHz). It is supplied with a short BNC cable, to connect to the antenna.
The AB3-GB is powered remotely by an ASA1 splitter via the aerial cable. Used to help compensate for long aerial cables or significant distances between transmitters and receivers.