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Psion Teklogix 7530 G2 Hand-Held Computer User Manual 189
Chapter 5: Configuration
Imager
5.11.5.2 Imager Advanced Options
Important: Do not adjust the advanced options without first consulting Psion
Teklogix technical support.
Default Dev. On Reboot
The value assigned to this parameter determines whether or not the driver will
restore the factory defaults to the imager device on the next reboot—that is, a cold
boot or warm boot.
Note: The driver will default the imager device on a clean-cold-boot, regardless
of the value of this parameter.
Min Scan Duration
This parameter defines the minimum amount of time in seconds that the imager will
scan when the trigger is pressed and held down without successful decode.
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 assigned to this parameter determines the number of captures the imager
device will take while the imager's internal hardware trigger is held 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 this parameter to on allows the imager to make automatic gain, integration
and illumination adjustments based on ambient light before capturing the bar code.
If the adjustment is insufficient, further adjustments are made automatically before
another image is captured.