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Gain
Parameter # F4h, F0h, A7h
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 256 grayscale values. Increasing the 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 manual gain, scan the bar code below followed by 3 bar codes from Appendix D, Numeric Bar Codes, in the range of 79 to
127, representing the value.
Set Gain
Exposure Time
Parameter # F4h, F0h, 38h
This parameter is only available when Image Capture Autoexposure is disabled. Exposure time controls the amount of time the digital
scanner is allowed to collect light, much like the shutter speed for a camera. Generally, the brighter the environment, the lower the
exposure time. Set the manual exposure time to one of the following values: 5 ms, 10 ms, 15 ms, 20 ms, 25 ms, or 30 ms. Increasing
the exposure time past 20 ms increases the risk of blurring the image due to hand jitter.
5 ms
(004Fh)
15 ms
(00ECh)
Imaging Preferences 5-9
*
10 ms
(009Dh)
20 ms
(013Bh)
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