Specifications subject to change without notice
© Digital View Ltd – Doc Ver 1.00 : 13 Jan, 2021 (SP-1920-DUAL-HDMI_manual.doc)
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25 of 42
Appendix II – RS-232 control protocols
RS-232 Serial control (Baud rate 9600,
8 bits, 1 stop bit and no parity
)
Physical connection :
Controller side
Computer side
Connector interface : CN8
Connector interface : Serial port
Mating connector : JST XHP-6
Mating connector : DB9 Female
PIN#
Description
PIN#
Description
4
RS-232 Tx Data
2
RS-232 Rx Data
5
Ground
3
RS-232 Tx Data
6
RS-232 Rx Data
5
Ground
Remark :
(1) : RS-232 connection cable, 300mm P/N 426171800-3 can be ordered separately for connection.
Software connection :
The OSD function can be controlled through sending the RS-232 protocol.
The RS-232 program can be custom-made to fit for application or it can be used the serial control program, like Accessport,
Telix or Serial Utility program developed by DigitalView. Please contact your local support for information.
1. Commands to implement switch mount control buttons
Function
Command
Description
Remark
Menu button
0xf7
Menu button pressed
Button equivalent
Select-down
button
0xfa
Select-down button pressed
Button equivalent
Select-up button
0xfb
Select-up button pressed
Button equivalent
Right/+ button
0xfc
Right/+ button pressed
Button equivalent
Left/- button
0xfd
Left/- button pressed
Button equivalent
2. Parameter setting - immediate, relative, reset and query
Function
Command
Description
Acknowledge (if enabled)
Volume control -
Left & right
channel
0x80, “a” | “A”,
nn | “+” | “-” |
“=”|
“r” | “R” |
“?”
Set audio (L+R) volume =
value/increment/decrement
Display OSD indicator
Reset
Query
volume
Volume control -
on/off (mute)
0x80, “m” | “M”,
“0” |
“1” |
“r” | “R” |
“O” |
“?”
Disable audio output.
Enable audio output.
Reset
Disable audio output without
“Mute” symbol
Query
“0” - audio off (muted).
“1” - audio on.
“O”- audio off (without mute
symbol)
Black level control
0x81,
nn | “+” | “-” |
“r” | “R” |
“?”
“m”
“n”
“i” , ss, nn
“o”, ss,
Set brightness =
value/increment/decrement
Reset
Query Current Source
Maximum query
Minimum query
Set, Source, value
Query, Source
Brightness.
ss - reference by Input main
select(0x98)
Range : “0””0”-“6””4”
Default : “3””2”
5
4
6
3
1
7
8
9
Mating face of CN8
Mating face of RS-232 DB9 Male
5
4
6
3
1