ViewSonic CD4220 User Guide - Page 57

6.3 Remote Control Pass-through mode When PC sets the LCD monitor to Remote Control Pass through mode, the LCD shall send a three bytes packet (followed by "CR") in response to RCU button activation. Note, that in this mode the RCU shall have no effect on the monitor function. For example: "+Volume" will not change the volume in the LCD but only sends "+Volume" code to PC over the RS232 port. Remote Control pass-through packet format from LCD monitor to PC(ASCII) Name Length RCU-Code1 RCU-Code2 CR Byte Count 3 MSB LSB 00D Bytes order 1 2 3 4 Example: Remote Control pass-through when "Menu" key is pressed (1A) Name Length RCU-Code1 RCU-Code2 CR Byte Count 3 1 A 00D Bytes order 1 2 3 4 Example: Remote Control pass-through when key "1" is pressed (01) Name Length RCU-Code1 RCU-Code2 CR Byte Count 3 0 1 00D Bytes order 1 2 3 4 Example: Remote Control pass-through when "OK" key is pressed (1F) Name Length RCU-Code1 RCU-Code2 CR Byte Count 3 1 F 00D Bytes order 1 2 3 4 Key Size Volume Up (+) Volume Down (-) Mute POWER INPUT PIP ON/OFF MENU Up Down Left(-) Right(+) SET PIP INPUT PIP CHANGE PICTURE MODE AUDIO INPUT SCREEN SAVER GAMMA SCREEN SAVER BRIGHTNESS DISPLAY AUTO SETUP EXIT Code (HEX) 0F 10 11 12 15 16 17 1A 1B 1C 1D 1E 1F 00 00 00 00 00 00 00 00 00 ViewSonic CD4220 55