CML Microcircuits enhances multi-mode two-way radio processors for marine VHF

Upgrades will provide precise positioning down to less than one metre in distress situations using Marine Digital Selective Calling (DSC) expansion sequence

CML Microcircuits enhances multi-mode two-way radio processors for marine VHF

CML Microcircuits has enhanced its CMX7031 and CMX7041 multi-mode two-way radio (TWR) processors operating in marine VHF mode to enable the ITU-R M.821 recommendation: Marine Digital Selective Calling (DSC) expansion sequences. Continuous transmission mode has also been included for use in distress alert situations.

Standard marine DSC only allows a position resolution down to approximately one nautical mile (1nmi). In distress situations this is not accurate enough to pin-point a precise position. The DSC expansion sequences allow precise geographical coordinates to be transmitted, providing position accuracy to less than one metre (1m).

Imagine the situation of a diver in rough seas with strong currents, calling to be picked-up. Providing a 1 square nmi collection position will prolong recovery and potentially put the diver at risk.

A marine VHF radio with the DSC expansion sequences enabled, would allow the diver to transmit an accurate collection position, down to 1 square metre, ensuring a safe and swift recovery.

The CMX7031 and CMX7041 multi-mode two-way radio processors are built on FirmASIC component technology allowing on-chip sub-systems to be reconfigured by a Function Image (FI).

These devices enable a revolutionary new platform approach to radio design, enabling multi-mode analogue two-way radios to be developed based on a single radio platform, conforming to many systems: PMR, LMR, trunking, marine, aviation, amateur radio, NOAA weather radio and packet data radio.

Key features

  • Full audio baseband processor with selectable processing order
  • Marine DSC signalling and expansion sequence
  • Programmable voice-band scrambler
  • NOAA and NWR operations
  • DTMF encoder

Applications

  • Marine VHF radio
  • NOAA weather radio (NWR)

For more information see: http://www.cmlmicro.com/news-and-press/Marine-Digital-Selective-Calling-DSC/

    Written by Wireless magazine
    Wireless magazine

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