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A QR code scanner is a 2D imager, not a laser. What it must decode, and what changes when one works a commercial shift instead of a bench.
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A barcode PDA with a built-in printer costs weight, runtime and jams. When on-device printing pays, when a dock printer wins, and what to ask first.
Detailed
PDA scanner datasheet specs decoded: aperture and stand-off, ISO 15416 label grade, depth of field, duty cycle, glare rejection and DPM polarization.
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