Frequency

Precise Positioning With CML Microcircuits' Multi-Mode Two-Way Radio Processors

27th June 2013
ES Admin
The CMX7031 and CMX7041 Multi-mode Two-way Radio processors, operating in Marine VHF mode, have been enhanced to enable the ITU-R M.821 recommendation: Marine Digital Selective Calling 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. 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.

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.

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.

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:
•Marive VHF Radio
•NOAA Weather Radio

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