User Guide
  3
To further enhance the viewing experience of the audience – more precise commands 
are added to minimize the disruption during a source change. 
Furthermore, to avoid confusion with old RS232 commands and possible software 
maintenance problem the silent OSD are implemented using new RS232 commands. 
The side benefit of this implementation is user choose silent OSD or non-silent OSD 
just by invoking different RS232 commands 
IR 030   source lock on 
IR 031   source lock off 
IR 032n   source select  n=1 is DVI-D 
 n=2 is DVI-RGB (*1) 
 n=3 is DVI-YPbPr (*1) 
 n=4 is D-sub RGB 
 n=5 is D-sub YPbPr (include 480i, 480p, 720p, 1080i, 576i, 576p) 
 n=6 is D-sub SCART 
  n=7 is RCA YPbPr (include 480i, 480p, 720p 1080i, 576i, 
576p)(*2) 
 n=8 is composite 
 n=9 is S-video 
IR 033n  aspect ratio n=1 is 4:3 
 n=2 is 16:9 
 n=3 is window = 4:3 inside 16:9 
 n=4 is letterbox 
IR 034nn brightness nn= 00-99, 99 is the brightest 
IR 035nn contrast  nn=00-99, 99 is highest contrast 
IR 036nn volume  nn=00-99, 99 is loudest 
IR 037nn zoom  nn=0-31, 31 is maximum zoom 
IR 038n  color temperature n=1 is low 
 n=2 is medium 
 n=3 is high 
New read commands (not related to silent mode) 
ID ?  returns  ID x    x= any unique ID such as serial no. 
Hour?  returns “HR nnnn\r” nnnn= lamp hours in 4 digits 
*1: select to DVI 
*2: Not support 



