User guide

Appendix D: Specifications 39
Serial Interface
Max Baud Rate Supported SDRK/6S and SDRK/6SD:
1200, 9600 or 19200 Baud (user-selectable)
SDRK/6A and SDRK/6AD:
19.2K Baud
SDRK/6S and SDRK/6SD
Serial Data Format:
Flow Control:
8 data bits, no parity, 1 stop bit
Hardware: Either RTS/CTS passed through or looped
back DTR/DSR passed through or looped back
or none (user-selectable)
Software: Transparent to software flow control
SDRK/6A and SDRK/6AD
Serial Data Format:
Transparent
Signals Transferred:
TX, RX, RTS, CTS, DTR, DSR
Serial Connector
DB9 Female (DCE)
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
Audio Connectors
2x3.5mm stereo jack socket (Line In & Line Out)
Microphone Support
Microphone may be connected to Remote Unit
Pullup resistor provides bias for condenser
microphone
Option to set microphone amplification to +17dB
Power Requirements
Local Hub
5V at up to 200mA (per port). Each port powered
individually by connected PC. A 5V, 3A (18W)
Regulated PSU is supplied for video/serial only
applications. 2.1mm center positive.
Certified to all relevant international safety standards.