Metrologic IS4910 Series Especificaciones descargar pdf (Pagina 24)

THEORY OF OPERATION

General Overview

The IS4920 is a small area imaging barcode scanning engine designed for

integration into handheld portable data terminals or other OEM devices

specifically for the barcode scanning and/or OCR applications. The IS4920

functions like a digital camera and increases functionality and value to an OEM

product by adding additional capabilities such as digital image capture, decoding

of all standard 1D & 2D barcodes, reading OCR fonts, document lift, signature

capture, etc.

The IS4920 scanning engine consists of two main system components: the

miniature IS4910 imaging engine, which utilizes a high-resolution CMOS image

sensor, and a small decode board that contains a powerful microprocessor and

the firmware to control all aspects of the engine’s operations and provide a

means of communication with the host system over the standard set of

communication interfaces.

The model IS4920-xx103 provides communication with the host system over

TTL-level RS232 communication interface. Contact a customer service

representative at 1-800-ID-METRO or 1-800-436-3876 for availability.

The model IS4920-xx38 provides communication with the host system over

USB. It can be configured for the following protocols of USB communication:

• USB Keyboard Emulation Mode (default)

• USB Serial Emulation Mode

The system hardware architecture of the IS4920 scanning engine is shown on

the figure below.

Figure 13. IS4920 System Architecture

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Metrologic IS4910 Series Especificaciones Pagina 24