DVIGear DVI-4541b User Manual
Page 9
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RS-232 Pin Assignments:
HDMI Switcher
Serial Control Unit
PIN
Definition
PIN
Definition
1
NC
1
NC
2
Tx
2
Rx
3
Rx
3
Tx
4
NC
4
NC
5
GND
5
GND
6
NC
6
NC
7
NC
7
NC
8
NC
8
NC
9
NC
9
NC
5 .2 .1 RS-232 Command Set
The characters within the quotation marks “ ” are ASCII characters.
Command
Action
“I” + “1”
Port 1 On
“I” + “2”
Port 2 On
“I” + “3”
Port 3 On
“I” + “4”
Port 4 On
“S” + “1”
Enable Signal Enhance
“S” + “0”
Disable Signal Enhance
“P” + “1”
Power On
“P” + “0”
Power Off
The unit will transmit the above characters when the button on the front of the
unit is pressed. For example, when the unit is ON and the Power button is
pressed to turn the unit OFF, the switcher will transmit the “P0” string over the
RS-232 link. When a string is transmitted to the switcher, the unit will return the
same string.
5 .3 Getting the Best Results
There are many factors that can influence the performance and quality of HDMI
signal distribution systems. Following some basic guidelines will help ensure the
best possible performance from this product.