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172 Appendix B: Technical reference
Top serial port connector (RS-232 standard only):
Pin
Signal
1
CD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
Bottom serial port connector (RS-232/RS-485 standard):
Pin
Signal
1
NC
2
RXD
3
TXD
4
NC
5
GND
6
NC
7
RTS
8
CTS
9
NC
* When resistor termination is activated, a resistor is connected between the receiver signals RXD- (pin 2)
and RXD+ (pin 8) at 120 ohms.
Audio input and audio output connectors
Matrox 4Sight X supports an audio interface, with one 20-bit stereo audio input
and one 24-bit stereo audio output connector. You can connect a stereo audio
device to the audio input and output connectors, using a 1/8" mini audio
input/output plug. The audio interface is only designed for line input/output
operations. Since there is no output amplifier or input preamplifier, the interface
does not support speakers or microphones.
I/O
Description of RS-232 standard
I
Carrier detect.
I
Receive data.
O
Transmit data.
O
Data terminal ready.
-
Ground.
I
Data set ready.
O
Request to send.
I
Clear to send.
I
Ring indicator.
I/O
RS-232 standard
I
Not connected.
I
Receive data.
O
Transmit data.
O
Not connected.
-
Ground.
I
Not connected.
O
Request to send.
I
Clear to send.
I
Not connected.
Description
RS-485 standard with resistor
termination not activated
Not connected.
RXD -.*
TX -.
Not connected.
Ground.
Not connected.
TX +.
RXD +.*
Not connected.
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