The Z-N538 features phantom power supply for DAB antennas, which is set to ON as factory default and can be switched ON or OFF individually. The Z-N538 does not come with internal phantom supply for FM antennas. Vehicles featuring an FM antenna system that require phantom power supply must be supplemented by the purchase of a suitable FM antenna phantom supply adapter. Such adapters will usually get hooked up to the P.ANT cable of the device.