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.
- Full audio baseband processor with selectable processing order
- Marine DSC signalling and expansion sequence
- Programmable voice-band scrambler
- NOAA and NWR operations
- DTMF encoder
- Marine VHF radio
- NOAA weather radio (NWR)
For more information see: http://www.cmlmicro.com/news-and-press/Marine-Digital-Selective-Calling-DSC/