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MD-19QD
The device can be controlled via the male type 9 pin D-sub/RS-232 connector to a computer using ASCII code.
1. Pin assignment of the male type 9 pin D-sub connector:
When a computer is used to control this device through a RS-232 port, pin 6, 7, 8, and 9 must be disconnected to
prevent connecting the VCC and GND signals from the device to the computer. A RS-232 port only uses pin 1, 2,
and 3 for control signal transmission.
2. A terminal or computer can be connected to the male type 9 pin D-sub connector on the real panel from it RS-
232 port to control this device using standard, uppercase ASCII codes.
2.1
The ASCII command codes for the quad are listed in the table below. The transmission protocol is 1200-
baud rate, 8 data bit, 1 start bit, 1 stop bit, and no parity.
Pin Assignment for Remote Control Connector
1
GND
4
NC
7
VCC
2
RX
5
NC
8
GND
3
TX
6
VCC
9
GND
1 2 3 4 5
6 7 8 9
Function
ASCII Command Code
Quad Screen Display
E
CH 1
A
CH 2
B
CH 3
C
CH 4
D
Freeze *1
EA, EB, EC, ED
Auto Switching Sequence
F
VCR/Live
G
Key Lock *2
H
Setup Menu *3
GH
Text Select Down *4
(GH) A
Text Select Up
(GH) B
Cursor Left
(GH) C
Cursor Right
(GH) D
Alarm Reset
I
< 4.3 > QD Remote Control Connection & Operation
