Motorola PL3307, Руководство по интеграции

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Imaging Preferences 5 - 11
Fixed Gain
Parameter # F1h 38h
This parameter only applies when Decoding or Image Capture Autoexposure is disabled. Gain is a means of
amplifying the raw image data before it is converted into 8-bit grayscale values. Increasing the fixed gain
increases brightness and contrast, but also increases noise (undesired electrical fluctuations in the image)
which makes the image less attractive and/or harder to decode.
To set the fixed gain, scan the bar code below followed by 3 bar codes from Appendix D, Numeric Bar Codes ,
in the range of 1 to 100, representing the value. The default is 50.
Exposure Time
Parameter # F4h F1h 37h
This parameter only applies when Decoding or Image Capture Autoexposure is disabled. It configures the
exposure for both Decode and Snapshot modes.
Each integer value represents 100
μ
s worth of exposure. The default value is 100 which results in an exposure
setting of 10 ms.
To set the Exposure Time parameter, scan Fixed Exposure followed by four numeric bar codes representing
the value in the range of 1 - 1000. Insert leading zeros if necessary. For example, to set a Fixed Exposure
value of 9.9 ms, scan 0, 0, 9, 9. See
Appendix D, Numeric Bar Codes for numeric bar codes.
Fixed Gain
NOTE The maximum exposure time is based on the configured Frame Rate . For example, for a frame rate of
60 fps, the maximum exposure time allowed is 15 ms. Setting exposure time to a larger value than the
frame rate allows sets the value to the maximum allowed exposure time.
As exposure time lengthens, aim brightness decreases.
Exposure Time
(4 digits)