Multi/Single Channel VHF/AM Transmitter in 19″ sub-rack. 3U high. 99 Ch. fast recall store. AM voice. 25 and 8.33 kHz channel spacing. 118-137 MHz. LAN ( SNMP ), RS-232 or RS-485 serial interface, full digital control and diagnostics. Internal in-band interface. Operates from AC mains with auto fail to 24V DC. Power supply included.Option: Internal in-band interface