PYLE Audio 7505-BTSDCMHC25 user manual Min Scan Duration, Captures Per HW Trigger, Auto Exposure

Chapter 5: Configuration

Imager

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 illu- mination 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.

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 this parameter to on speeds the “Auto Exposure” process. It allows the imager to rapidly snap a number of bar code capture attempts while finding ideal values for gain, inte- gration and illumination.

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