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Chapter 5: Configuration
Imager
192 WORKABOUT PRO Hand-Held Computer With Windows CE 5.0 User Manual
Min Scan Duration
This paramet er defines th e minimum amount of ti me in seconds that the imager wil l
scan when the trigger is pressed and hel d down wi thou t successful dec ode.
Note: The actual scan duration when the trigger is pressed relies on the value
assigned to Captures Per HW Trigger, below.
Captures Per HW Trigger
The value ass igned to thi s par amete r de ter mi nes the number of captur es t he i mager
device wil l ta ke whi le t he i ma ger' s i nte rnal har dware trigger is hel d down.
Note: This parameter, together with “Min Scan Duration”, determines the
actual scan duration. When the scan trigger is pressed and held down, the
driver starts a timer based on the value of “Min Scan Duration” and also
sends a command to emulate the hardware trigger. When completed, if the
time has not yet expired, it will send another command to the imager
device, forcing the imager to flash again using the value assigned to
“Captures Per HW Trigger”.
Auto Exposure
Important: This parameter value should only be changed by qualified Psion
Teklogix personnel. It should be left at the default value – ‘on’.
Setting t h is para me ter to on allows t h e i mager to make automatic gai n, int egr ati on
and illumination ad just ments base d on ambient light before capturing the b ar c ode.
If the adjustment is insufficient, further adjustments are made automatically before
anothe r i mage is capture d.
Fast Converge
Note: “Auto Exposure” must be set to ‘on’ in order for this parameter
to function.
Keep in mind that while this parameter can improve imager performance,
“Fast Converge” increases battery power consumption.
Setting t h is para me ter to on speeds t he “ Auto Exposure” pro cess . It allows the
imager to r apid ly sn ap a nu mbe r of bar code capture attempts while finding idea l
values for gai n , in tegr at ion and illuminati on.