User manual
SIR Infrared System  SIR 320 
Copyright by beyerdynamic  3 
Content 
About this manual................................................................................................................4 
Symbols...................................................................................................................................................... 4 
Important tips.......................................................................................................................6 
General information ................................................................................................................................ 6 
Safety information................................................................................................................................... 6 
 SIR 320 Infrared Multichannel Receiver ..........................................................................7 
Contents of basic delivery....................................................................................................................... 8 
Accessories ................................................................................................................................................ 8 
System components ................................................................................................................................. 8 
Technical data .......................................................................................................................................... 9 
Characteristics of reception.................................................................................................................. 10 
Horizontal ........................................................................................................................................... 10 
Vertical ................................................................................................................................................ 11 
Operating controls .............................................................................................................12 
Front view ............................................................................................................................................... 12 
Infrared lens ........................................................................................................................................ 13 
LC-Display .......................................................................................................................................... 13 
Navigation keys.................................................................................................................................. 13 
Charging contacts .............................................................................................................................. 13 
Headphone socket .............................................................................................................................. 13 
Side- / Rear view ..................................................................................................................................... 14 
Carrying clip ....................................................................................................................................... 14 
Lanyard................................................................................................................................................ 14 
Battery cover...................................................................................................................................... 14 
Operation ...........................................................................................................................15 
Starting the receiver .............................................................................................................................. 15 
Volume control / memory function..................................................................................................... 16 
Auto Switch-off function ...................................................................................................................... 16 
Disposable / rechargeable batteries....................................................................................................... 17 
Service mode ........................................................................................................................................... 18 
Activation of the service mode ....................................................................................................... 18 
Battery voltage................................................................................................................................... 19 
IR-field strength ................................................................................................................................. 19 
Guard function (option) .................................................................................................................... 20 
System parameters P1, P2, P3......................................................................................................... 20 
Muting ................................................................................................................................................. 20 
Channel shift ...................................................................................................................................... 20 
Exit the service mode........................................................................................................................ 21 
Hardware reset ........................................................................................................................................ 21 
Behaviour in the charging tray............................................................................................................. 21 
Trouble shooting .................................................................................................................................... 22 
Table of frequencies and channels ....................................................................................................... 23 
Warranty.............................................................................................................................24 










