APPENDIX G: SPECIFICATIONS
55
Serial Interface
Max Baud Rate Supported
19.2K Baud
Serial Data Format
Transparent
Signals Transferred
TX, RX, RTS, CTS, DTR, DSR
Local Unit Connector
DB9 Female (DCE)
Remote Unit Connector
DB9 Male (DTE)
Audio Interface
Description
Bi-directional stereo audio link
Transmission method
Digitized virtually CD quality audio (16-bit, 38.4kHz)
Signal levels
Line level (4 Volts Pk-Pk maximum)
Input Impedance
47kΩ
Local Unit Connectors
2 x 3.5mm stereo jack socket
(Line In & Line Out)
Remote Unit Connectors
2 x 3.5mm stereo jack socket
(Line/Mic In & Line Out)
Microphone Support
Microphone may be connected to Remote Unit
Pull-up resistor provides bias for condenser microphone
Option to set microphone amplification to +17dB
Power Requirements
Local Unit
5V at up to 275mA supplied through USB interface.
Connector for optional 5V PSU
2.1mm DC Jack, center positive
Overvoltage Protection: 5.6V
Remote Unit
5V DC. Remote Unit itself requires up to 1.2A.
Remainder is available to USB devices (2A fused).
2.1mm DC jack, center positive
Overvoltage Protection: 5.6V
Remote Unit Power Supply
5V DC, 4A (20W)
(certified to all relevant safety standards)
Universal IEC Input
2.1mm DC jack, center positive
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