Automatic Gain Control (AGC)
AGC Sampling Mode
Usage:
AGC Sampling allows you to specify how automatic gain control sam-
pling will be done.
Definition:
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 symbol.
Serial Cmd:
<K504,gain
Default:
Continuous
Options:
0 = Disabled
Disabled
Usage:
Disabled is not recommended, but can be useful in certain applications
in which symbols do not require a large depth of field.
Definition:
When AGC Sampling is set to Disabled, gain levels can only be manually
controlled by the Gain command.
Leading Edge
Usage:
Leading Edge is rarely used, but in some cases can improve scan rates
when symbols are skewed and the leading edge of a symbol is difficult to
locate.
Definition:
Finds the leading edge of a symbol by looking for a 40µS quiet zone fol-
lowed by the number of transitions set in
7-21, stores the highest value of the samples, and adjusts the AGC
accordingly at the end of the scan.
Continuous
Usage:
Continuous is the default and the preferred mode for sampling analog
signal amplitude.
Definition:
Samples AGC throughout the scan at the rate set in
Counter"
AGC value at the end of the scan.
MS-860 Industrial Raster Reader User's Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
level,AGC sampling
mode,AGC min,AGC max>
1 = Leading Edge
on page 7-21, averages the sample values, and adjusts the
Read Cycle
2 = Continuous
"Transition Counter"
on page
"Transition
7-19
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