PSC Falcon 4420 48-Key Instructions d'exploitation télécharger pdf (Page 34)

Scanning Bar Codes

32 Falcon

4400 Series with Windows

Bar Code Scanning with 2D Imager

Scanning bar codes with the 2D imaging device is similar to scanning with a

laser scanner. The operation and configuration of the scanner is performed in

the same way as laser scanning devices. Trigger behavior and scanning time-

outs are the same as laser scanning devices.

Scanning Differences

Scanning Aimer

The imager contains an aiming beam rather than a red laser. The aiming beam

mimics a laser line for purposes of orienting the imager to a bar code. Figure

20 shows how the aiming beam visually differs from the laser beam in laser

scanning devices.

Figure 20. Laser vs. Imaging beam

Note that the aiming beam for the imager is green, rather than red.

Orientation

Rotational orientation does not affect the imager module's ability to read bar

codes. For example, the imager can read a bar code when the aimer beam is

parallel to the lines of the bar code. What is important is the location of the

aimer in relation to the center of the bar code. The aiming beam should be

centered over the bar code, but it can be positioned in any direction for a good

read.

Figure 21. Aiming Beam Positioning

Laser

Aiming Beam

Linear bar codes

2D Matrix symbol

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 63 64

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PSC Falcon 4420 48-Key Instructions d'exploitation Page 34