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SI-TEX Metadata VHF / AIS Antenna Splitter

  • Applications: All AIS Transponders and Receivers
  • Function: Enables AIS to Share a Single Antenna with VHF and AM/FM Radio
  • Power: 12 Volt or 24 Volt DC, Waterproof: IPX7 Rated
  • Item #: 
    Model #: 


    Shipping Weight: 
    1.60 Lbs.
    List Price: 
    Our Price:
    Status:   null Call to confirm

    Quantity : 


    Package Includes:

    • AIS antenna splitter unit
    • VHF radio connection cable
    • AIS transceiver connection cable
    • Combined Power Cable with FM Broadcast Antenna connection
    • Quick start guide
    • Product manual
    • Mounting Screws


    • The SI-TEX MDA-3 AIS Antenna Splitter provides signal gain, improving AIS reception and range.
    • The SI-TEX Antenna Splitter is an Intelligent device that allows both the VHF Radio and any AIS Device connected to receive signals simultaneously.
    • Allows the use of the primary ships VHF antenna for both VHF radio and the AIS transceiver. Eliminates the need for 2nd Ant.
    • When either the AIS transceiver or VHF radio transmits, the AIS antenna splitter automatically senses the transmission and routes the signal to the antenna.
    • If the VHF radio is transmitting when the AIS transceiver wants to transmit the SI-TEX AIS antenna splitter will give priority to the VHF radio and allow the AIS to transmit as soon as the VHF radio transmission ends.
    • The Antenna Splitter has a fail-safe mode that allows the VHF radio to operate normally in case of a power failure.
    • Low power consumption
    • Works with both 12/24 volts
    • Quality construction made specifically for marine use
    • Includes LED indicators to provide information regarding the status of the AIS antenna splitter
        • Power - Indicator is illuminated while the unit is powered
        • TX AIS - Indicator flashes to indicate AIS transmissions
        • TX VHF - Indicator flashes to indicate VHF radio transmissions


    • Electrical connections
      • AIS antenna splitter
      • Power supply
      • VHF antenna connector
      • VHF radio connector
      • AIS transceiver connector
      • FM radio connector
    • Waterproof: IPX7
    • Dimensions: 140 mm L x 100 mm W x 43 mm H
    • Weight 250g
    • Voltage supply DC 9.6 to 31.2V
    • Current consumption <150mA at 12VDC
    • VHF and AIS frequency range 156MHz to 163MHz
    • Insertion loss AIS & VHF receive paths 0dB 0dB
    • Max RF input power, AIS port 12.5W
    • Max RF input power, VHF port 25W
    • Min RF input power, VHF port 100mW
    • AIS, VHF and Antenna port impedance 50 Ohms
    • FM port impedance 75 Ohms
    • Switching time, receive to AIS transmit <10 us
    • Switching time, receive to VHF transmit <10us
    • Operating temperature: -10°C to +55°C


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