Motorola MC9090-G User's Guide download pdf (Page 43)

Operating the MC9090-G RFID 2 - 15

Image Capture Mode

This mode allows the user to capture an image within the mobile computer’s field of view. The user can use the

mobile computer to capture signatures or images of items like damaged boxes.

Scanning Considerations

Typically, scanning is a simple matter of aim, scan/decode and a few quick trial efforts master it. However, two

important considerations can be used to optimize any scanning performance:

•

Range

Any scanning device decodes well over a particular working range — minimum and maximum distances from

the bar code. This range varies according to bar code density and scanning device optics.

Scanning within range brings quick and constant decodes; scanning too close or too far away prevents

decodes. Move the scanner closer and further away to find the right working range for the bar codes being

scanned. However, the situation is complicated by the availability of various integrated scanning modules. The

best way to specify the appropriate working range per bar code density is through a chart called a decode zone

for each scan module. A decode zone simply plots working range as a function of minimum element widths of

bar code symbols.

•

Angle

Scanning angle is important for promoting quick decodes. Do not scan at too sharp an angle; the scanner

needs to collect the image to make a successful decode. Practice quickly shows what tolerances work.

Scanning Bar Codes

1. Ensure that a scan enabled application is loaded on the mobile computer.

2. Aim the scan exit window at the bar code.

3. Pull the trigger.

•

For mobile computers with a laser scanner, ensure the red scan beam covers the entire bar code. The red

scan LED lights to indicate that the laser is on. The green scan LED lights and an audible beep sounds, by

default, to indicate the bar code was decoded successfully.

Figure 2-16

Laser Scanner Aiming Pattern

•

For mobile computers with an imager, place the bar code in any orientation within the aiming pattern.

Ensure the entire symbol is within the rectangular area formed by the brackets in the aiming pattern. The

red laser aiming pattern turns on to assist in aiming. If necessary, the mobile computer turns on its red LED

to illuminate the target bar code. The green scan LED lights and an audible beep sounds, by default, to

indicate the bar code was decoded successfully. Note that when the mobile computer is in Pick List Mode,

the bar code is not decoded until the crosshair is touching the bar code.

NOTE Contact the Symbol Support Center if chronic scanning difficulties develop. Decoding of properly printed

bar codes should be quick and effortless.

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Motorola MC9090-G User's Guide Page 43