SPL1500 Antenna Splitter VHF/AISAn AIS receiver or transponder requires a VHF antenna, but Digital Yacht's SPL1500 AIS-VHF antenna splitter allows an existing antenna to be used for both the AIS and VHF (DSC). Unlike most simple splitters, it can also be used with a class B transponder system and it incorporates special circuitry to ensure safe operation of the two transmitting devices.. The unit has three simple connections - one input for the main VHF antenna and then outputs for the AIS receiver/transponder and another for the DSC VHF. It utilizes Digital Yacht's ZeroLoss technology, to ensure the very best possible reception and transmission from all devices. Most importantly it is also fail safe, so should the unit ever stop working or lose power, it will not affect the main VHF operation. Until now, Digital Yacht, have recommended a dedicated antenna for a receiver or transponder. However, with the new this new ZeroLoss technology, we can now offer a solution that greatly simplif