Infocus IN35 Zusätzliches Handbuch

You can use any one of a variety of available RS-232 programs to control a projector. Hyperterminal, for 

example, comes with all versions of Microsoft Windows. Also consider Look RS232 (available at 

www.lookrs232.com/). Some programs will allow you to assign RS-232 strings to hot keys or buttons. 

Companies such as Crestron (www.crestron.com) and AMX (www.amx.com) make RS-232 control boxes 

that make it easier to control your projector. 

All InFocus projectors use ASCII format command format. All commands consist of 3 alpha characters 

followed by a request and all enclosed by parentheses. The request can be a read request (indicated by a 

“?”) or a write request (indicated by 1 to 4 ASCII digits).  

A read request will report information to you, such as lamp hours. A write request is to tell the projector to 

change a setting. 

Command to request Brightness setting is (BRT?) 

( starts the command 

BRT denotes the brightness command 

? denotes the read request 

) ends the command 

The response would appear as (0-22, 10), where 

0-22 is the brightness range of the projector. 

10 is the current brightness setting  

Here are some other examples. To interpret the responses, you may need to refer to the actual list of 

commands. 

Function 

Command 

Response 

Description 

Lamp Hours 

(LMP?) 

(0-32767, 250) 

250 lamp hours 

Aspect Ratio 

(ARZ?) 

(0-4, 1) 

16:9 aspect ratio 

Vertical Keystone 

(DKC?) 

(53-203, 60) 

Vertical keystone set to 60 

Command to change Brightness setting to level 10 is (BRT10) 

 ( starts the command 

BRT denotes the brightness command 

10 denotes the write request 

) ends the command