Microscan QX-830 User Manual page 125

Scanner Parameters
Reader Setup
Reader Setup parameters allow the user to configure Gain Level, Tracking, and Scan
Speed parameters, as well as various Automatic Gain Control parameters.
Gain Level
Gain Level can be used in two different ways, depending on the AGC Sampling Mode.
When AGC Sampling Mode is set to Disabled: Gain Level is used as a "Fixed Gain".
The analog signal is amplified by this gain value. For Fixed Gain operation, changes to
gain adjustment setting should be performed in Auto Calibration.
When AGC Sampling Mode is set to Leading Edge or Continuous: Gain Level defines
the "set point" analog signal level. The AGC system will attempt to hold the analog signal
at this level by automatically raising and lowering the gain as needed.
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QX-830 Compact Industrial Scanner User's Manual