E-5
Appendices
MicroHAWK V320-F / V330-F / V420-F / V430-F Barcode Reader User Manual
E-3 Calibration Options
E
E-3-2 Exposure
•Note: If you choose to calibrate the reader by sending a <@CAL> command, a decode is also required for the
calibration process to be completed successfully.
•Note: This table shows guidelines for exposure settings based on various line speeds. The settings shown depend
on the reader’s optical configuration and on symbol element size.
When disabled, exposure is fixed and is not part of the calibration process.
When enabled, exposure is calibrated to provide the best image quality and performance for the
symbol present in the field of view. Calibration requires that a decodable symbol be placed in the field of
view, as feedback from the symbol decoding process is used to select
the best exposure setting. If a
symbol is not decoded the process will result in a fail condition. Exposure is enabled by default.
Quick Calibrate uses the automatic exposure control feature of the image sensor to adjust the
exposure value such that the current image falls into a desirable region of the image sensor’s sensitivity
range, ensuring optimal image luminance. The image sensor converges on the optimal exposure value
within a few image frames.
E-3-2 Exposure
Definition: Unless the application is static, exposure should be configured based on
the application’s line speed. The table below is a general guideline for
exposure configurations at various line speeds.
Serial Cmd:
<
K529,
gain,
exposure
,focus position,symbol type,WOI framing,WOI margin,
line scan height,processing>
Default: Quick Calibrate
Options: 0 = Disabled
1 = Enabled (Decode Required)
2 = Quick Calibrate
Exposure Line Speed
100,000 – 4,000 Static
4,000 – 1,250 5” / sec
1,250 – 700 10” / sec
700 – 500 15” / sec
500 – 400 20” / sec
Disabled
Enabled
Quick Calibrate