Microscan MS-4X Manual do Utilizador descarregar pdf (Página 123)

Chapter 6 Autocalibration

MS-880 Industrial Long Range Scanner User’s Manual 6-9

6–Autocalibration

Note: Focus positions Inside, Outside and Set posted near the bottom of the above

menu are explained more fully in “Calibration Results Embedded Menu” on page 6-11.

Note: If you are using the 9-pin configuration port and doing autocalibration by serial

command or embedded menus, you will be able to view scanned bar code data in the

menu, but upon exiting the autocalibration menu, you will not be able to see bar code

data without sending the following command: <K146,,1>. If using the ESP, this is

not necessary.

Scanner Settings

Motor Speed, Gain Setting, and Tracking adjustments affect the read perfor-

mance. Focus controls a stepper motor that physically slides a lens back and forth to

control focal length. These settings are adjusted automatically in autocalibration.

The status of these parameters is displayed on the bottom line of the menu under

Motor, Gain, Track, and Focus (see “Overview of Optoelectrics” on page 8-4. These

settings are incremented or decremented by pressing the indicated key shown on the

menu. PDF-417 Decode

, AGC Status, Laser Power, and Raster Status use single

commands to toggle between states.

AGC Status

Typing S toggles AGC between Enable/Disable, as displayed on a the status line

near the bottom of the menu. With AGC disabled this value is simply the Gain setting.

However, with AGC enabled, this value represents the gain the scanner has to set to

maintain the desired signal amplitude. If a label is in close, the AGC level should be a

small value because the scanner does not need much gain to achieve the desired sig-

nal amplitude. However, as a label gets farther away from the scanner, this value will

increase to maintain the signal amplitude.

Laser Power

Typing L toggles between High and Low laser settings. See “Laser Power” on page 9-

8 for details.

PDF417 Decode Test

Typing D toggles the PDF417 Decode Test between Enable/Disable, as displayed

on a the status line near the bottom of the menu. Once set to Enabled, PDF417 only

is enabled and a special test mode is enabled that displays the decodes per second of

a full PDF417 label. While autocalibration is not performed in this mode, you can still

adjust settings manually.

This special read rate will remain enabled until the Autocalibration menu is exited or

PDF417 is disabled with another D command.

Note: This mode averages decode and capture time over a series of readings, thus

assuring for a smooth read-rate output, but at the cost of delayed reaction to label

movement and user setting changes.

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Microscan MS-4X Manual do Utilizador Página 123