6 
Omnidirectional and/or Linear Imager Modes 
The area imager can be configured to operate as an omnidirectional imager, or a 
linear imager, or a combination of both.  Trigger
†
 and presentation operations can 
be configured separately for omnidirectional and linear scan modes. 
•  When a unit is configured to operate as an omnidirectional imager, all 
1D and 2D bar codes are scanned omnidirectionally.  The only 
exceptions are Code 128 scanner configuration labels, which must be 
linearly aligned for successful scanning.   
Note: The IS4900 area-imaging engines do not require linear 
alignment of Code 128 scanner configuration labels.  The bar 
code should be placed near the center of the engine's field of 
view indicated by the targeting dot.  
•  When a unit is configured to operate as a linear imager, 1D bar codes 
must be linearly aligned for successful scanning. In linear configuration 
2D bar codes cannot be scanned. 
•  When a unit is configured to operate as both a linear and 
omnidirectional imager, 1D bar codes have to be linearly aligned for 
successful scanning while 2D bar codes are scanned omnidirectionally. 
By default, the Focus product series
 is configured for omnidirectional scanning 
for trigger and presentation operations.  By default, the MS7580 is configured to 
omnidirectional scanning for presentation and pass-through operations and with  
1D linear scanning/2D omnidirectional scanning for button
†
 
operations. 
 
Enable Linear Only  
in Trigger Operations 
Disable Linear Only  
in Trigger Operations 
³120213
 
³120203
 
 
†
 
The term trigger and button are synonymous. 
 
The Focus product series includes the IS1650, MS1890, MS1633, and the MS1690.