Intermec SE1223 User manual

SE 1223 Integrated VLD Scanner

USER’S GUIDE

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PN: 961-032-042

Revision B

September 1999

" NOTICE The information contained herein is proprietary and is provided solely for the

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of Intermec Technologies Corporation.

SE 1223 Scanner User’s Guide i

CONTENTS

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SECTION 1

General Information

SE 1223 Integrated VLD Scanner Overview 1-1. . .. . .. . .. . .

Definition of Terms 1-1. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Aperture 1-1. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

ASCII 1-2. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Bar 1-2. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Bar Code Density 1-2. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Bar Code Security 1-2. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Bar Height 1-2. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Bar Width 1-2. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

CDRH 1-2. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

CDRH Class I 1-3. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

CDRH Class II 1-3. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Character 1-3. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Character Set 1-3. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Check Digit 1-3. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Codabar 1-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Code 3 of 9 (Code 39) 1-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Code 93 1-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Code 128 1-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Code Length 1-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Continuous Code 1-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Dead Zone 1-5. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Decode 1-5. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Decode Algorithm 1-5. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Depth of Field 1-5. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Discrete Code 1-5. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Discrete 2 of 5 1-5.. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

EAN 1-6. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Element 1-6.. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Encoded Area 1-6. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

CONTENTS

ii SE 1223 Scanner User’s Guide

Host Computer 1-6. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

IEC 1-6. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

IEC Class I (IEC 825 Class I) 1-6. . .. . .. . .. . .. . .. . .. . ..

Intercharacter Gap 1-7. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Interleaved Bar Code 1-7. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Interleaved 2 of 5 1-7. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Laser 1-7. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Laser Diode 1-7. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Laser Indicator 1-8. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. .

Lead-In Characters 1-8. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

MIL 1-8. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Misread (Misdecode) 1-8. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

MSI Plessey 1-8. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Nominal 1-9. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Nominal Size 1-9. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Parameter 1-9. . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Percent Decode 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Print Contrast Signal (PCS) 1-9. . .. . .. . .. . .. . .. . .. . .. .

Programming Mode 1-9. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Quiet Zone 1-10. . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Reflectance 1-10. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Resolution 1-10. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Scan Area 1-10. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Scanner 1-10. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Scanning Mode 1-10. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Scanning Sequence 1-11. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Self-Checking Code 1-11. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Space 1-11. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Specular Reflection 1-11. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Start/Stop Character 1-11. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Substrate 1-11. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Symbol 1-11. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Symbol Aspect Ratio 1-12. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Symbol Length 1-12. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Symbology 1-12. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Tolerance 1-12. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

UPC 1-12. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Visible Laser Diode (VLD) 1-12. . .. . .. . .. . .. . .. . .. . .. . .

Laser Hazard Classifications 1-13. . .. . .. . .. . .. . .. . .. . .. . .. .

CONTENTS

SE 1223 Scanner User’s Guide iii

SECTION 2

Scanner Parameters

Introduction 2-1. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Identifying the Default Settings 2-2. . .. . .. . .. . .. . .. . ..

Scanning Sequence 2-2.. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Errors While Scanning 2-3. . .. . .. . .. . .. . .. . .. . .. . .. . .

Reset to Default Settings 2-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Decode Data Packet Format 2-4. . .. . .. . .. . .. . .. . .. . .. . .. .

Laser On Time 2-8.. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Aim Duration 2-9. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Transmit “No Read” Message 2-10. . .. . .. . .. . .. . .. . .. . .. . ..

Parameter Scanning 2-11. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Linear Code Type Security Levels 2-12. . .. . .. . .. . .. . .. . .. . .

Bidirectional Redundancy 2-16. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Symbology Types 2-17. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

UPC/EAN 2-18. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Enable/Disable UPC-A 2-18. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Enable/Disable UPC-E 2-19. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Enable/Disable UPC-E1 2-20. . .. . .. . .. . .. . .. . .. . .. . .. .

Enable/Disable EAN-8 2-21. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Enable/Disable EAN-13 2-22. . .. . .. . .. . .. . .. . .. . .. . .. . .

Enable/Disable Bookland EAN 2-23. . .. . .. . .. . .. . .. . .. .

Decode UPC/EAN Supplementals 2-24. . .. . .. . .. . .. . .. . .. . .

Decode UPC/EAN Supplemental Redundancy 2-26. . .. . .

Transmit UPC-A Check Digit 2-27. . .. . .. . .. . .. . .. . .. . .. . ..

Transmit UPC-E Check Digit 2-28. . .. . .. . .. . .. . .. . .. . .. . ..

Transmit UPC-E1 Check Digit 2-29. . .. . .. . .. . .. . .. . .. . .. . .

UPC-A Preamble 2-30. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

UPC-E Preamble 2-31. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

UPC-E1 Preamble 2-32. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Convert UPC-E to UPC-A 2-33. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Convert UPC-E1 to UPC-A 2-34. . .. . .. . .. . .. . .. . .. . .. . .

EAN Zero Extend 2-35. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Convert EAN-8 to EAN-13 Type 2-36. . .. . .. . .. . .. . .. . ..

UPC/EAN Security Level 2-37. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

UPC/EAN Security Level 0 2-37. . .. . .. . .. . .. . .. . .. . .. . .

UPC/EAN Security Level 1 2-38. . .. . .. . .. . .. . .. . .. . .. . .

UPC/EAN Security Level 2 2-38. . .. . .. . .. . .. . .. . .. . .. . .

UPC/EAN Security Level 3 2-39. . .. . .. . .. . .. . .. . .. . .. . .

UPC/EAN Coupon Code 2-40. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

CONTENTS

iv SE 1223 Scanner User’s Guide

Code 128 2-41. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Enable/Disable USS-128 2-41. . .. . .. . .. . .. . .. . .. . .. . .. .

Enable/Disable UCC/EAN-128 2-42. . .. . .. . .. . .. . .. . .. . .

Enable/Disable ISBT 128 2-43. . .. . .. . .. . .. . .. . .. . .. . ..

Code 39 2-44. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Enable/Disable Code 39 2-44. . . . . . . . . . . . . . . . . . . .. . . . . . .

Enable/Disable Trioptic Code 39 2-45. . .. . .. . .. . .. . .. . ..

Convert Code 39 to Code 32 2-46. . .. . .. . .. . .. . .. . .. . .. .

Code 39 Prefix 2-47. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Set Lengths for Code 39 2-48. . .. . .. . .. . .. . .. . .. . .. . .. .

Code 39 Check Digit Verification 2-50. . .. . .. . .. . .. . .. . .

Transmit Code 39 Check Digit 2-51. . .. . .. . .. . .. . .. . .. . .

Enable/Disable Code 39 Full ASCII 2-51. . .. . .. . .. . .. . ..

Code 93 2-53. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Enable/Disable Code 93 2-53. . . . . . . . . . . . . . . . . . . .. . . . . . .

Set Lengths for Code 93 2-54. . .. . .. . .. . .. . .. . .. . .. . .. .

Interleaved 2 of 5 2-56. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Enable/Disable Interleaved 2 of 5 2-56. . .. . .. . .. . .. . .. . .

Set Lengths for Interleaved 2 of 5 2-57. . .. . .. . .. . .. . .. .

I 2 of 5 Check Digit Verification 2-60. . .. . .. . .. . .. . .. . ..

Transmit I 2 of 5 Check Digit 2-61. . .. . .. . .. . .. . .. . .. . ..

Convert I 2 of 5 to EAN-13 2-62. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Discrete 2 of 5 2-63. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Enable/Disable Discrete 2 of 5 2-63. . .. . .. . .. . .. . .. . .. . .

Set Lengths for Discrete 2 of 5 2-64. . .. . .. . .. . .. . .. . .. .

Codabar 2-67. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Enable/Disable Codabar 2-67.. . .. . .. . .. . .. . .. . .. . .. . ..

Set Lengths for Codabar 2-68. . . . . . . . . . . . . . . . . . . . . . . . . .

CLSI Editing 2-71. . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . .. . ..

NOTIS Editing 2-72. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

MSI Plessey 2-73. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Enable/Disable MSI/Plessey 2-73. . .. . .. . .. . .. . .. . .. . .. .

Set Lengths for MSI Plessey 2-74. . .. . .. . .. . .. . .. . .. . ..

MSI Plessey Check Digit 2-77. . .. . .. . .. . .. . .. . .. . .. . .. . .. .

Transmit MSI Plessey Check Digit 2-78. . .. . .. . .. . .. . .. .

MSI Plessey Check Digit Algorithm 2-79. . .. . .. . .. . .. . ..

Transmit Code ID Character 2-80. . .. . .. . .. . .. . .. . .. . .. . .. .

Prefix/Suffix Values 2-82. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Scan Data Transmission Format 2-84. . .. . .. . .. . .. . .. . .. . ..

Numeric Bar Codes 2-87. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Cancel 2-89. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

CONTENTS

SE 1223 Scanner User’s Guide v

SECTION 3

Scanner Specifications

SE 1223 Standard Scanner 3-1. . .. . .. . .. . .. . .. . .. . .. . .. . .

SE 1223 Standard Scanner Decode Zone 3-3. . .. . .. . .. . .. . .

SE 1223 Wide Angle Scanner 3-4. . . . .. . .. . .. . .. . .. . .. . .. .

SE 1223 Wide Angle Scanner Decode Zone 3-6. . .. . .. . .. . ..

SE 1223 Very High Density (VHD) Scanner 3-7. . .. . .. . .. . .

SE 1223 Very High Density (VHD) Scanner Decode Zone 3-9

SE 1223 Long Range (LR) Scanner 3-10.. . . . . . . . . .. . .. . .. . .

SE 1223 Long Range (LR) Scanner Decode Zone 3-12. . .. . .. .

APPENDIX A

Prefix and Suffix Character Equivalent Table

TABLES

Table 2-1 Scanner Default Settings 2-5. . . . . . . . . . . . . . . . . . . .

Table 3-1 SE 1223 Standard Scanner Technical

Specifications 3-1. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Table 3-2 SE 1223 Standard Scanner Decode

Distances 3-3. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Table 3-3 SE 1223 Wide Angle Scanner Technical

Specifications 3-4. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Table 3-4 SE 1223 Wide Angle Scanner Decode

Distances 3-6. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

Table 3-5 SE 1223 VHD Scanner Technical

Specifications 3-7. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

Table 3-6 SE 1223 VHD Scanner Decode Distances 3-9. . .. .

Table 3-7 SE 1223 LR Scanner Technical Specifications 3-10.

Table 3-8 SE 1223 Standard Scanner Decode Distances 3-12.

Table A-1 Prefix and Suffix Character Equivalent A-88. . .. . .

CONTENTS

vi SE 1223 Scanner User’s Guide

SE 1223 Scanner User’s Guide 1-1

Section 1

General Information

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SE 1223 Integrated VLD Scanner

Overview

Your SE 1223 Integrated VLD Scanner is a miniature, vis-

ible-laser scanner with an integrated decoder. The SE 1223

scanner contains an inboard microcontroller that scans and

processes bar codes into ASCII data.

The SE 1223 contains a miniature scan engine, on board

voltage monitor, a watchdog timer, two hardware hand-

shaking lines, and an EEPROM for storing decoder parame-

ters. It also provides over-temperature protection that turns

the laser off if the temperature rises above acceptable limits

(50_C).

Definition of Terms

This section defines terms used in this User’s Guide. These

terms include general computer jargon, scanner descrip-

tions, and brief descriptions of common bar code symbolo-

gies.

Aperture

The opening in an optical system defined by a lens or a

baffle that establishes the field of view.

SECTION 1General Information

1-2 SE 1223 Scanner User’s Guide

ASCII

American Standard Code for Information Interchange. A 7

bit-plus-parity code representing 128 letters, numerals,

punctuation marks, and control characters. It is a standard

data transmission code in the U.S.

Bar

The dark element in a printed bar code symbol.

Bar Code Density

The number of characters represented per unit of measure-

ment (e.g. characters per inch).

Bar Code Security

The level of bar code quality that the scanner will attempt

to decode.

Bar Height

The dimension of a bar measured perpendicular to the bar

width

Bar Width

Thickness of a bar measured from the edge closest to the

symbol start character to the trailing edge of the same bar.

CDRH

Center for Devices and Radiological Health. A federal

agency responsible for regulating laser product safety. This

SECTION 1 General Information

SE 1223 Scanner User’s Guide 1-3

agency specifies various laser operation classes based on

power output during operation.

CDRH Class I

This is the lowest power CDRH laser classification. This

class is considered intrinsically safe, even if all laser output

were directed into the eye’s pupil. There are no special oper-

ating procedures for this class.

CDRH Class II

No additional software mechanisms are needed to conform

to this limit. Laser operation in this class poses no danger

for unintentional direct human exposure.

Character

A pattern of bars and spaces which either directly repre-

sents data or indicates a control function, such as a number,

letter, punctuation mark, or communications control con-

tained in a message.

Character Set

Those characters available for encodation in a particular

bar code symbology.

Check Digit

A digit used to verify a correct symbol decode. The scanner

inserts the decoded data into an arithmetic formula and

checks that the resulting number matches the encoded

check digit. Check digits are required for UPC but are op-

tional for other symbologies. Using check digits decreases

the chance of substitution errors when a symbol is inter-

preted.

SECTION 1General Information

1-4 SE 1223 Scanner User’s Guide

Codabar

A discrete self-checking code with a character set consisting

of digits 0 to 9 and six additional characters: (-- $ : / , +).

Code 3 of 9 (Code 39)

A versatile and widely used alphanumeric bar code symbol-

ogy with a set of 43 character types, including all uppercase

letters, numerals from 0 to 9, and seven special characters

(-- . / + % $ and space). The code name is derived from the

fact that 3 of the 9 elements representing a character are

wide, while the remaining six are narrow.

Code 93

An industrial symbology compatible with Code 39 but offer-

ing a full character ASCII set and a higher coding density

than Code 39.

Code 128

A high density symbology which allows the controller to en-

code all 128 ASCII characters without adding extra symbol

elements.

Code Length

Number of data characters in a bar code between the start

and stop characters.

Continuous Code

A bar code or symbol in which all spaces within the symbol

are parts of characters. There are no intercharacter gaps in

SECTION 1 General Information

SE 1223 Scanner User’s Guide 1-5

a continuous code. The absence of gaps allows for greater

information density.

Dead Zone

An area within a scanner’s field of view, in which specular

reflection may prevent a successful decode.

Decode

To recognize a bar code symbology such as UPC/EAN and

then analyze the content of the specific bar code scanned.

Decode Algorithm

A decoding scheme that converts pulse widths into data

representation of the letters or numbers encoded within a

bar code symbol.

Depth of Field

The range between minimum and maximum distances at

which a scanner can read a symbol with a certain minimum

element width.

Discrete Code

A bar code or symbol in which the spaces between charac-

ters (intercharacter gaps) are not part of the code.

Discrete 2 of 5

A binary bar code symbology representing each character

by a group of five bars, two of which are wide. The location

of wide bars in the group determines which character is en-

SECTION 1General Information

1-6 SE 1223 Scanner User’s Guide

coded; spaces are insignificant. Only numeric characters (0

to 9) and START/STOP characters may be encoded.

EAN

European Article Number. This European/International

version of the UPC provides its own coding format and

symbology standards. Element dimensions are specified

metrically. EAN is used primarily in retail.

Element

Generic term for a bar or space.

Encoded Area

Total linear dimension occupied by all characters of a code

pattern, including start/stop characters and data.

Host Computer

A computer that serves other terminals in a network, pro-

viding such services as computation, database access, su-

pervisory programs, and network control.

IEC

International Electrotechnical Commission. This interna-

tional agency regulates laser safety by specifying various

laser operation classes based on power output during opera-

tion.

IEC Class I (IEC 825 Class I)

This is the lowest power IEC laser classification. Conformi-

ty is ensured through a software restriction of 120 seconds

SECTION 1 General Information

SE 1223 Scanner User’s Guide 1-7

of laser operation within any 1000 second window and an

automatic laser shutdown if the scanner’s oscillating mirror

fails.

Intercharacter Gap

The space between two adjacent bar code characters in a

discrete code.

Interleaved Bar Code

A bar code in which characters are paired together, using

bars to represent the first character and the intervening

spaces to represent the second.

Interleaved 2 of 5

A binary bar code symbology representing character pairs

in groups of five bars and five interleaved spaces. Interleav-

ing provides for greater information density. The location of

wide elements (bar/spaces)within each group determines

which characters are encoded. This continuous code type

uses no intercharacter spaces. Only numeric (0 to 9) and

START/STOP characters may be encoded.

Laser

An acronym for Light Amplification by Stimulated Emis-

sion of Radiation. The laser is an intense light source. Light

from a laser is all the same frequency, unlike the output of

an incandescent bulb. Laser light is typically coherent and

has a high energy density.

Laser Diode

A gallium-arsenide semiconductor type of laser connected to

a power source to generate a laser beam. This laser type is

a compact source of coherent light.

SECTION 1General Information

1-8 SE 1223 Scanner User’s Guide

Laser Indicator

A semiconductor diode (LED--Light Emitting Diode) used as

an indicator, often in digital displays. The semiconductor

uses applied voltage to produce light of a certain frequency

determined by the semiconductor’s particular chemical com-

position.

Lead-In Characters

Preamble characters

MIL

1 mil = 1 thousandth of an inch.

Misread (Misdecode)

A condition which occurs when the data output of a reader

or interface controller does not agree with the data encoded

within a bar code symbol.

MSI Plessey

A numeric-only bar code type. It can accept a variable num-

ber of digits up to 13. MSI Plessey consists of four bars and

four adjacent spaces. Each bar\space pair consists of one

information bit. A zero bit consists of a narrow bar followed

by a wide space, while one bit consist of a wide bar followed

by a narrow bar. The zero bit is one unit bar followed by a

two-unit space and the one bit is a two-unit bar followed by

a one unit space. The primary application for the MSI Ples-

sey code is marking of retail shelves and subsequent scan-

ning with portable devices for inventory purposes.

SECTION 1 General Information

SE 1223 Scanner User’s Guide 1-9

Nominal

The exact (or ideal) intended value for a specified parame-

ter. Tolerances are specified as positive and negative devi-

ations from this value.

Nominal Size

Standard size for a bar code symbol. Most UPC/EAN codes

can be used over a range of magnifications (e.g., from 0.80

to 2.00 of nominal).

Parameter

A variable that can have different values assigned to it.

Percent Decode

The average probability that a single scan of a bar code

would result in a successful decode. In a well-designed bar

code scanning system, the probability should approach

100%.

Print Contrast Signal (PCS)

Measurement of the contrast (brightness difference) be-

tween the bars and spaces of a symbol. A minimum PCS

value is needed for a bar code symbol to be scannable. PCS

= (R

L

-- R

D

) /R

L

, where R

L

is the reflectance factor of the

background and R

D

the reflectance factor of the dark bars.

Programming Mode

The state in which a scanner is configured for parameter

values.

SECTION 1General Information

1-10 SE 1223 Scanner User’s Guide

Quiet Zone

A clear space, containing no dark marks, which precedes

the start character of a bar code symbol and follows the stop

character.

Reflectance

Amount of light returned from an illuminated surface.

Resolution

The narrowest element dimensions which can be distin-

guished by a particular reading device or printed with a

particular device or method.

Scan Area

Area intended to contain a symbol.

Scanner

An electronic device used to scan bar code symbols and pro-

duce a digitized pattern that corresponds to the bars and

spaces of the symbol. Its three main components are:

1. Light source (laser or photoelectric cell), illuminates a

bar code.

2. Photodetector, registers the difference in reflected

light (more light reflected from spaces).

3. Signal conditioning circuit, transforms optical detector

output into a digitized bar pattern.

Scanning Mode

The scanner is energized, programmed, and ready to read a

bar code.

SECTION 1 General Information

SE 1223 Scanner User’s Guide 1-11

Scanning Sequence

A method of programming or configuring parameters for a

bar code reading system by scanning bar code menus.

Self-Checking Code

A symbology that uses a checking algorithm to detect en-

coding errors within the characters of a bar code symbol.

Space

The lighter element of a bar code formed by the background

between bars.

Specular Reflection

The mirror-like reflection of light from a surface which can

“blind” a scanner.

Start/Stop Character

A pattern of bars and spaces that provides the scanner with

start and stop reading instructions and scanning direction.

The start and stop characters are normally to the left and

right margins of a horizontal code.

Substrate

A foundation material on which a substance or image is

placed.

Symbol

A scannable unit that encodes data within the conventions

of a certain symbology, usually including start/stop charac-

ters, quiet zones, data characters, and check characters.

SECTION 1General Information

1-12 SE 1223 Scanner User’s Guide

Symbol Aspect Ratio

The ratio of symbol height to symbol width.

Symbol Length

Length of symbol measured from the beginning of the quiet

zone (margin) adjacent to the start character to the end of

the quiet zone (margin) adjacent to a stop character.

Symbology

The structural rules and conventions for representing data

within a particular bar code type such as UPC/EAN, Code

39, etc.

Tolerance

Allowable deviation from the nominal bar or space width.

UPC

Universal Product Code is a relatively complex numeric

symbology. Each character consists of two bars and two

spaces, each of which can be any of four widths. The stan-

dard symbology for retail food packages in the United

States.

Visible Laser Diode (VLD)

A solid state device which produces visible laser light. Laser

light emitted from the diode has a wavelength of 670 to 680

nanometers.

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Intermec SE1223 User manual

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