Hand Held Products 3700 CCD manual System Hardware Description, Introduction, Host System

SYSTEM HARDWARE DESCRIPTION 2

2.1Introduction

The major components of the system are the SCANTEAM 3700 Machine Mount CCD and the host instrument or equipment. Electrical power is generally supplied to the 3700 Machine Mount CCD by the host system. Figure 2.1 shows the functional relationships between the components of the basic system.

Auxiliary Trigger

Device

(Optional)

SCANTEAM

3700

Machine

Mount CCD

Asynchronous Communication

Host System

Power Supply

Bar Code

Provides Data Input

Aux Trigger

Triggers Decoder

Scanning Circuitry ✺

Scans Bar Code

Decoder

Enables Scanning Circuitry

Reads Bar Code

Sends Decoded Bar Code to Host

Host Application

Supplies Power to 3700 (typically)

Sends Configuration Commands

Sends Operational Commands

Sends Configuration Status Query Commands

Sends Software Trigger Signal (Optional)

✺Scanning circuitry is internal to 3700.

Figure 2.1 Basic System Operation

System Hardware Description 2–1