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5 - 4
Symbol PL4507 Decoder Integration Guide
Imager Preferences
The parameters in this chapter control image capture characteristics. Image capture occurs in all modes of
operation, including decode, video, and snapshot.
Operational Modes
The decoder has three modes of operation:
•
Decode Mode
•
Snapshot Mode
• Snapshot with Viewfinder Mode
•
Video Mode.
Decode Mode
By default, upon a trigger event, the decoder attempts to locate and decode bar codes within its field of view. The
decoder remains in this mode as long as the trigger is active, until it decodes a bar code, or it reaches the
Session Timeout on page
Snapshot Mode
Use Snapshot Mode to capture a high-quality image and transmit it to the host. To temporarily enter this mode scan
the Snapshot Mode bar code. While in this mode the decoder blinks the green LED at 1-second intervals to
indicate it is not in standard operating (decode) mode.
In Snapshot Mode, the decoder turns on the Symbol SE4500's laser aiming pattern to highlight the area to capture
in the image. The next trigger event instructs the decoder to capture a high quality image and transmit it to the host.
A short time may pass (less than 2 seconds) between trigger activation and image capture as the decoder adjusts
to the lighting conditions. Hold the decoder steady until image capture, denoted by a single beep.
If a trigger event does not occur within the Snapshot Mode Timeout period, the decoder returns to Decode Mode.
Use
Snapshot Mode Timeout on page 5-14
To disable the laser aiming pattern during Snapshot Mode, see
Use
Video View Finder on page 5-30
behaves as a video camera until the trigger activates, at which time a Snapshot occurs as described above.
4-14.
to adjust this timeout period. The default timeout period is 30 seconds.
to enable Snapshot with Viewfinder Mode. In this mode the decoder
Snapshot Aiming Pattern on page
Decode
5-14.
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