Radio transceiver peripheral device to enable reporting of identity, status and position.

Radio Interface

• Audio In, Audio Out
• PTT detect
• Transmitter ON
• Power
• Ground

Cable to Radio

• Radio specific (eg. Motorola MCS-2000)

PC/Laptop Interface

• Standard RS-232
• TXD
• RXD
• CTS
• RTS
• Data Rate 9600 Baud

Power Requirement

• Drawn from radio
• 10-14V (12V nominal) at <200mA DC

Signalling

• Method: Fast frequency shift signalling
• Type: Synchronous
• Rate: 1200bps

Air Interface

• WARPS proprietary protocol

Error Handling

• CCITT 16-bit CRC
• Corrupted messages ignored - operator requests retransmission.

Bit Error Rate

• 2.5 x 10^-4 at SNR = 12dB

External I/O

• MAYDAY input
• 2 uncommitted, user-defined inputs
• Continuous transmission input
• 1 uncommitted output

Connectors

• d25 to radio
• SMA to GPS aerial
• Terminal block/plug for external I/O
• RJ45 RS232 interface

Physical

• Extruded aluminium case
• Weight: 515g