Microscan MS-4 Specifications Page 118

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Automatic Gain Control
7-10 MS-3 Laser Scanner User’s Manual
7–Scanner Setup
Automatic Gain Control
AGC is the acronym for Automatic Gain Control. AGC increases the depth of field by
attempting to maintain signal strength at a constant level regardless of the range of
the bar code label.
Gain Adjustment
(factory setting)
AGC Sampling
Disabled
Definition: Sets a voltage amplitude value for the analog circuitry.
Usage: Can be useful for fine-tuning gain or when portions of analog signals
spike, as in the case of specular reflection or extraneous noise.
Caution: Changes to Gain are best done by the Calibration routine.
Serial Cmd: <K504,gain adjustment,AGC sampling,AGC min,AGC max>
Default: 90 (nominal).
Note: Gain is optimized at the factory before shipment; the default
value may not be 90.
Options: 40 to 255
Definition: AGC Sampling allows you to specify how automatic gain control sam-
pling will be done.
Serial Cmd: <K504,gain adjustment,AGC sampling,AGC min,AGC max>
Default: Continuous
Options: 0 = Disabled
1 = Leading Edge
2 = Continuous
Definition: When AGC Sampling is set to Disabled, gain levels can only be man-
ually controlled by the Gain command (“Gain Adjustment” on page 6-
6).
Usage: Disabled is not recommended, but can be useful in certain applications
in which labels do not require a large depth of field.
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