Symbol LS 1220, Product Reference Manual

Page: 54 / 136

6-3
Scanning
Pulse Trigger
A pulse on the Trigger line turns the laser on. The laser is turned off by any of the following
(whichever comes first):
• Completion of the variable time-on (set in 0.5 second increments to a
maximum of 4.0 seconds)
• A good decode.
Constant Scan and Report
Bar code information is continuously decoded and transmitted immediately.
Next New Code
The scanner decodes and transmits information, then waits until a new code is detected
before transmitting again.
Continuous Level
Same as Level Trigger option, except the laser is on continuously, attempts a
decode when the trigger line goes low, and stops the decode attempt when the line goes
high.
Continuous Pulse
Same as Pulse Trigger option, except the laser is on continuously, attempts a
decode when the trigger line goes low, and stops the decode attempt after the completion
of the time-on period.
If the scanner is triggered by any option other than Constant Scan and Report or Next New
Code, and fails to decode a symbol before the laser turns off, the scanner transmits a No
Decode Message to the host (if that option is selected).