
HDMI V2.0 4x1 Presentation Switcher with Audio Extraction
19
Command
Function
Command Example and
Feedback
CM[
B]:xxx.
Set the ASCII string of “VOLUME DOWN”
to be saved. It will be automatically sent
to display device when the “VOLUME
DOWN” button have been pressed.
xxx: ASCII string.
The “B” represents the baud rate of third-
party device.
B
Baudrate
B
Baudrate
1
2400
2
4800
3
9600
4
19200
5
38400
6
57600
7
115200
CM3:abc123
CMDVOLDN/-
[B]:xx xx xx.
Set the HEX string of “VOLUME DOWN”
to be saved. It will be automatically sent
to display device when the “VOLUME
DOWN” button have been pressed.
xx xx xx: HEX string.
The “B” represents the baud rate of third-
party device.
B
Baudrate
B
Baudrate
1
2400
2
4800
3
9600
4
19200
5
38400
6
57600
7
115200
CMDVOLDN/-3:1A 2A 3A 4A