TransCore 2611SS Users Manual

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Installation & Maintenanc e /Service Guid e

P/N 411554

IT2200 Reader System

with Multimode Capability

Information in this document is subject to change and does not represent a commitment on the part of TransCor e, Inc.

2002 TransCore, Inc. All rights reserved. TransCore, TollTag, and Dynamic Tag are tr ademarks and Amtech, SmartPass, Dynicom, and PassKey are registered trademarks of TransCore, Inc. The PassKey system is covered by U.S. Patents 5,414, 624 and 5,737,710. All other trademarks listed are the property of their respective owners. Printed in the U.S.A.

For further inf ormation, cont act:

TransCore 19111 Dallas Parkway, Suite 300 Dallas, Texas 75287-3106 USA

Phone: (972) 733-6600 Fax: (972) 733-6699

TransCore Action Center (TrAC) 19111 Dallas Parkway, Suite 300 Dallas, Texas 75287-3106 USA

Phone: (972) 733-6681 Fax: (972) 733-6695

WARNING TO USERS IN THE UNITED STATES

FEDERAL COMMUNICATIONS COMMISSION (FCC) RADIO FREQUENCY

INTERFERENCE STATEMENT

47 CFR §15.105(a)

NOTE: This equipment has been tested and found to comply wit h the limits f or a Class A digital device

pursuant to Part 15 of the Federal Communications Commission (FCC) rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency (RF) energy and may cause harmful interference to radio communications if not installed and used in accordance with the instruction manua l. Ope rating this equipment in a residential area is likely to cause harmful interference , in whic h case , dep ending on the laws in effect, the users may be required to corre ct the interferen ce at thei r o wn exp ens e.

NO UNAUTHORIZED MODIFICATIONS

47 CFR §15.21

CAUTION: This equipment may not be modified, altered, or changed in any way without permission

from TransCore, Inc. Unaut horized modif icati on may void the equipment a uthoriza tion fr om the FCC and will void the TransCore warran ty.

USE OF SHIELDED CABLES IS REQUIRED

47 CFR §15.27(a)

Shielded cables must be used with this equipment to comply with FCC regulations.

A license issued by the FCC is required to operate this RF identification device in the United States. Contact TransCore, Inc. for additional information concerning licensing requirements for specific devices.

TransCore, Inc.

USA

Contents

1 Before You Begin

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Guide Topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Typographical Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Licensing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

U.S. Licensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Health Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

2 Theory of Operat ion

Overview of RFID Theory 2-3

Compon ents 2-3

Reader 2-4 RF Module 2-5 Antennas 2-5

Tags 2- 7 Host Computer 2-8 Operational Chara c te ris t ic s 2-8

Reading Range 2-9

Reading Speed 2-9

Number of Characters St ored in Tag 2-9

Number of Characters Written to an IT2200-Series Tag 2-9

Coding Format of the Tag Data 2-9

Tag Orient at ion and Plac ement 2 -10

Noise and In t erf erence Immunity 2- 10

Frequenc y and Power 2-11

Tag Lif etime 2- 11

Tag Read/Write Accuracy Rate 2-11

Amtech RF Technology 2-11

Signal Transmission and Acq uis it ion 2-12

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Automa tic Vehicle I dentification Transac t ion Proces s 2-12

Types of RFID Transactions 2-12

3 System Components

Overview 3-3 IT2020 Reader Logic Card 3-5

Functions 3-5 Features 3-6

IT2611 RF Module (Bistatic and Monostatic) 3-7

RF Module Connect ions 3-9

Transmit C onnector (Bis t at ic R F Module) 3-9 Receive Con n ector (B i static RF Module) 3-9 Transmit / R ec eive Connec t or (Monos t at ic R F M odule) 3-9 Check Tag Connector 3-10 Data Connector 3-10

Power Supply Connector 3-10 Functions 3-10 Features 3-10

Type Testing 3-11

RF Emissions 3-11

Antenna s 3-13

AA3152 Universal Toll Antenna 3-13

Functions 3-13

Features 3-14 AA3153 Beacon Antenna 3-14

Functions 3-14

Features 3-14 IT2502 Check Tag Antenna 3-14

Check Tag 3-14 Tags 3-15

IT2221 Tag 3-15

Functions 3-17

Features 3-18 IT2211 E xterior Tag 3- 18 IT2235 Tag 3-19

Functions 3-20

Features 3-21 ATA Tag 3 -23

Tag Programmer 3-23

IT2410 Tag Programmer 3-24

Functions 3-24 Features 3-25

4 Installing the IT2200 Reader System

Assessing the Site and Formulating a Frequency Plan 4-3 Site Preparation Checklis t 4-4 Components Checklist 4-4 Task Checklist 4-5 Where to Mount the Components 4-5

Canopy M ount 4-6 Overhead Gantry M ount 4-7 Overpass Mount 4-8 Cantilever Arm Mount 4-9 Lane-side “Pillbox” Mount 4-11

Contents

Installin g the IT2200 R eader System 4-13

Installing the IT2020 Reader Logic Card 4-14 Installin g the IT26 11 RF Module 4-17 Installing t he AA3152 U T A 4-19 Installing the AA3153 Beacon Antenna 4-21 Installing t he IT2502 C heck Tag Antenna wit h a UTA 4-23 Installing the IT2502 Check Tag Antenna with a Beacon Antenna 4-24

5 Tuning th e Lane

Why You Need to Tune a Lane 5-3

Required Equipme nt 5-4 Optional Equipme nt 5-4

Tuning the Lane 5-5

Starting the Engineering Host 5-5 Lane Tag T es t 5-6 Check Tag Test 5-9

IT2000 Check Tag Test 5-9 ATA Check Tag Test 5-11

Testing the Footprint 5-11

Running the CAM Test for IT2200-Series Tags 5-11 Tag-on-a-Stick Test for IT2235 Tag 5-12 Running t he CAM Test fo r AT A-Type Ta gs 5-13 Tag-on-a-Stick Test Using ATA-Type Tag 5-13

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Vehicle-M ounted Tag Test Using IT2235 Tag 5-13 Vehicle-Mounted Tag Test Using ATA-Type Tag 5-14

Dynamic Performance Test 5-15

Starting the D y namic Per fo rm ance Test 5-15 IT2235 Dy namic Perf ormance D riv e-Throug h T ag Test 5-16 IT2221 Dy namic Perf ormance D riv e-Throug h T ag Test 5-16 ATA Tag Dy namic Perf ormance D riv e-Throug h T ag Test 5-17 Adjustin g t he R ead/Wr it e Z one 5-18

Completing Antenna Connections 5-18

6 Troubleshooting the Installation

Required Equipment 6-3 Cross-L an e Interfer en ce in RFID Systems 6-3

What Is Cross-Lane Interference? 6-3 Dete rm ining Acc eptab le Lane Per f ormance 6-4 Identifying Cross-Lane Interference 6-4 Diagnos ing Cross-Lane Interf erence 6-5 Remedying Cross-Lane Interference 6-5

Frequenc y Separatio n 6-6

RF Power 6-6

Time Division Multiplexing 6-6

Physical R emedies 6-8

Troubleshooting Indications and Actions 6-10 Removal and Replacement Procedures 6-17

Reader Logic Card 6-17

Removal 6-17

Replacement 6-17 RF Module 6-18

Removal 6-18

Replacement 6-18 Transmit / R ec eive Ante nnas 6-18

Removal 6-18

Replacement 6-18 Check Ta g Antenna 6 - 19

Removal 6-19

Replacement 6-19 Data Cable 6-20

Removal 6-20

Replacement 6-20 Antenna C able 6-20

Removal 6-20

xii

Replacement 6-20

7 Preventive Maintenance

Preventive Maintenance Schedule 7-3 Visu al I n specti o n 7-3

A Acronyms and Glossary

B Block Diagrams

IT2200 Reader System with Multimode Capability B-3 IT2020 Reader Logic Card B-5

Contents

IT2611 RF Module B-9

C System Technical Specifications

Component Specifications C-3

IT2020 Reader Logic C ard C-3

Electrical Specifications C-3 Environmental Specifications C-4 Physical Specifica ti ons C -4

IT2611 RF Module C-5

Interfaces C-5 Electrical Specifications C-5 Environmental Specifications C-5 Physical Specifica ti ons C -6

Housing Specifications C-6 AA3152 Universal Toll Antenna and AA3153 Beacon Antenna C-6

Environmental Specifications C-7 IT2502 Check Tag Antenna C-7

D Hardware Interfaces

Reader Logic Card Hardware Interconnection D-3

16 Bit ISA Bus D-4 Optional External Power D-5 Expansi on Interfaces (I ndustry Pack) D-5 LEDs D-6

xiii

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Time Division Mult iplexing Connector D -6 Backgro und Debug ger Connec t or D-7 General Purpose I/O Port (IT2020 - 004 Read er) D -8 Hardware Diagnostic Port D-8 RS-232 D-10

IT2020 Reader Logic Card Interface D-11 Pin Designations D-11

IT2020 ISA Card Inte rf ac e Connect or D -11 Interface Connector D-19 Power Connector D-20

Reader-to-RF Module Communications D-20 RF Module Interface Connector D-21 IT2410 Tag Programmer Hardware Interconnection D-23

E Connector Pinouts

IT2020 Reader Logic Card E-3

Tag Data/Control E-3 TDM E-5 ISA Bus E-5 IP Module Logic Interface E-9 IP Mo dule I/O C onn e ctor E-1 1 Auxiliary Power E-13 BDM E-14 General Purpose I/O E-15 HW Diagnostics Port E-16 RS-232 E-17

IT2611 RF Module E-18

Index

(Index to be supplied with final version of guide.)

xiv

List of Figures

Figure 2-1 Typical RFID Components for a Bistatic (Two-Antenna) Configuration . . . . . . . . . . . 2-4

Figure 2-2 Field Size, Shape, and Antenna Polarization Define the Reading Range

(Bistatic Configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-3 Field Size, Shape, and Antenna Polarization Define the Reading Range

(Monostatic Configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-4 Tag Orientation with Linear Polarized Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-5 Typical Read/Write Transaction Using the IT2200 Reader System and an

IT2200-Series Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-6 Four Transactions Can Occur Within 96 Milliseconds . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-7 Typical Read-only Transaction Using the IT2200 Reader System in

ATA Mode Operation with an ATA-Type Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-8 Typical Dedicated Read-Only Transaction Using the IT2200 Reader System in

Multimode Operation with an ATA-Type Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-9 Typical Read-Only Transaction Using the IT2200 Reader System in

ATA Mode Operation with an ATA-Type Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Figure 3-1 Relationship of the IT2200 Reader System Components

(Bistatic Installation Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-2 IT2020 Reader Logic Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-3 IT2020 Reader Logic Card Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-4 IT2611 RF Module Connections (Bistatic Configuration) . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-5 IT2611 RF Module Connections (Monostatic Configuration) . . . . . . . . . . . . . . . . . . 3-9

Figure 3-6 Tag Orientation with Linear Polarized Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-7 IT2221 Tag Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-8 Alternative Mounting Locations for IT2221 Tag . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Figure 3-9 IT2211 Tag Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-10 IT2235 Tag Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Figure 3-11 IT2235 Tag Display Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Figure 3-12 IT2410 Tag Programmer System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Figure 3-13 Tag Programming Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Figure 4-1 Canopy Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Figure 4-2 Overhead Gantry Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Figure 4-3 Overpass Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Figure 4-4 Cantilever Arm Mount (Bistatic Configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Figure 4-5 Cantilever Arm Mount (Monostatic Configuration) . . . . . . . . . . . . . . . . . . . . . . . 4-10

Figure 4-6 Bistatic Laneside Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Figure 4-7 Monostatic Laneside Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Figure 4-8 Antenna Placement for Pillbox Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Figure 4-9 IT2020 Reader Logic Card Installed in Typical Host Computer or Lane Controller

Chassis (Top View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Figure 4-10 IT2020 Reader Logic Card Factory Dipswitch Settings . . . . . . . . . . . . . . . . . . . . 4-15

Figure 4-11 Frequency Enable Switch on Rear of IT2020 Reader Logic Card . . . . . . . . . . . . . 4-16

Figure 4-12 Location of Battery Jumper (J8) in Relation to Battery . . . . . . . . . . . . . . . . . . . . 4-16

Figure 4-13 IT2611 RF Module Mounting and Components for Both Monostatic

and Bistatic Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Figure 4-14 IT2611 RF Module Connectors (Monostatic RF Module Shown) . . . . . . . . . . . . . 4-19

Figure 4-15 AA3152 UTA Mounting and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20

Figure 4-16 AA3153 Beacon Antenna Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

Figure 4-17 IT2502 Check Tag Antenna Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

Figure 5-1 Background Status Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Figure 5-2 Sample RF Attenuation Statistics for Check Tag . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Figure 5-3 Acceptable RF Attenuation Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Figure 5-4 Ranges of RF Attenuation Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Figure 5-5 Sample Continuous Check Tag Read Request Display . . . . . . . . . . . . . . . . . . . . . 5-10

Figure 5-6 Typical Read/Write Zone for a Reader (Bistatic Configuration) . . . . . . . . . . . . . . . 5-12

Figure 5-7 Location of LEDs on Reader Logic Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Figure 6-1 RF Footprint Extends Beyond Lane Boundaries (Bistatic Configuration Shown) . . . . . 6-5

Figure 6-2 TDM Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Figure 6-3 Antenna Tilt Angle Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Figure 6-4 Downlink Antenna Side Angle Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Figure 6-5 Location of Battery Jumper (J8) in Relation to Battery . . . . . . . . . . . . . . . . . . . . 6-12

Figure 6-6 Frequency Enable Switch on Rear of IT2020 Reader Logic Card . . . . . . . . . . . . . . 6-12

Figure 7-1 Visual Inspection Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Figure B-1 IT2200 Bistatic Reader System Functional Block Diagram . . . . . . . . . . . . . . . . . . . B-3

Figure B-2 IT2200 Monostatic Reader System Functional Block Diagram . . . . . . . . . . . . . . . . B-4

Figure B-3 IT2020 Reader Logic Card Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . B-5

Figure B-4 IT2020 Reader Logic Card Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6

Figure B-5 Minimum Connections for the IT2020 Reader Logic Card Interface

(Bistatic Application) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7

Figure B-6 Minimum Connections for the IT2020 Reader Logic Card Interface

(Monostatic Application) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8

Figure B-7 IT2611 RF Module Functional Block Diagram (Bistatic Configuration) . . . . . . . . . . . B-9

Figure B-8 IT2611 RF Module Functional Block Diagram (Monostatic Configuration) . . . . . . . B-10

Figure D-1 Locations of Switches on IT2020 Reader Logic Card . . . . . . . . . . . . . . . . . . . . . . D-4

Figure D-2 Typical TDM Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6

Figure D-3 Locations of LEDs on IT2020 Reader Logic Card . . . . . . . . . . . . . . . . . . . . . . . . D-18

Figure D-4 Bistatic RF Module Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-19

Figure D-5 Monostatic RF Module Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-19

Figure D-6 Twenty-six Pin Connector Showing Terminal Designators (RF Module) . . . . . . . . . D-20

Figure D-7 IT2410 Tag Programmer Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . D-24

xvi

List of Tab les

List of Tables

Table 1-1 Typographical Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Table 2-1 Time and Distance Required to Complete Payment Zone . . . . . . . . . . . . . . . . . . . 2-14

Table 3-1 IT2611 RF Module Uplink and Downlink Specifications . . . . . . . . . . . . . . . . . . . . 3-12

Table 3-2 Example of Condition Code Bit Programming for IT2235 Tag . . . . . . . . . . . . . . . . . 3-21

Table 3-3 Audio/Visual Options Bits Decoding for IT2235 Tag . . . . . . . . . . . . . . . . . . . . . . . 3-23

Table 3-4 IT2410 Tag Programmer Indicator LEDs and Descriptions . . . . . . . . . . . . . . . . . . . 3-26

Table 4-1 Example Frequency Plan for Four-Lane Plaza . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Table 4-2 Listing of Shorted Pins for Loopback Connector . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Table 6-1 Frequency Plan for Four-Lane Toll Plaza . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Table 6-2 Frequency Settings Using TDM for Four-Lane Toll Plaza with TDM . . . . . . . . . . . . . . 6-8

Table 6-3 Failure Indicated by Host Software Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

Table 6-4 Failure During Check Tag Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

Table 6-5 Unacceptable RF Attenuation Statistics Using Check Tag . . . . . . . . . . . . . . . . . . . 6-13

Table 6-6 Unacceptable RF Attenuation Statistics Using Vehicle-Mounted Tag . . . . . . . . . . . 6-13

Table 6-7 Self-Test Fail LED on Reader Logic Card Lights . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

Table 6-8 Spotty Pattern or Low Handshake Counts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

Table 7-1 Preventive Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Table C-1 IT2020 Reader Logic Card Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . C-3

Table C-2 IT2020 Reader Logic Card Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4

Table C-3 IT2020 Reader Logic Card Environmental Tolerances . . . . . . . . . . . . . . . . . . . . . . C-4

Table C-4 IT2020 Reader Logic Card Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . C-4

Table C-5 IT2611 RF Module Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5

Table C-6 IT2611 RF Module Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

Table C-7 IT2611 RF Module Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

Table C-8 Antenna Environmental Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7

Table D-1 Optional External Power Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5

Table D-2 TDM Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7

Table D-3 BDM Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7

Table D-4 General Purpose I/O Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-8

Table D-5 Hardware Diagnostic Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-9

Table D-6 RS-232 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-10

Table D-7 IT2020 Reader Logic Card Default I/O Settings . . . . . . . . . . . . . . . . . . . . . . . . . . D-11

Table D-8 IT2020 Reader Logic Card Default IRQ Settings . . . . . . . . . . . . . . . . . . . . . . . . . D-11

Table D-9 ISA Bus Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-11

Table D-10 Optional External Power Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-15

Table D-11 IP Module Logic Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-15

Table D-12 IP Module I/O Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-17

Table D-13 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-18

Table D-14 RF Module-to-Reader Logic Card Interface Connector . . . . . . . . . . . . . . . . . . . . D-21

Table D-15 RF Module Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-23

Table D-16 RF Module-Antenna Connectors for Bistatic Operation . . . . . . . . . . . . . . . . . . . . D-23

Table D-17 RF Module-Antenna Connectors for Monostatic Operation . . . . . . . . . . . . . . . . . D-23

Table D-18 IT2410 Tag Programmer Interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-24

xvii

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Table E-1 Tag Data/Control Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3

Table E-2 TDM Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4

Table E-3 ISA Bus Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5

Table E-4 IP Module Logic Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9

Table E-5 IP Module I/O Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-11

Table E-6 Auxiliary Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-13

Table E-7 BDM Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-14

Table E-8 General Purpose I/O Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15

Table E-9 Hardware Diagnostics Port Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-16

Table E-10 RS-232 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-17

Table E-11 RF Module-To-Reader Logic Card Interface Connector . . . . . . . . . . . . . . . . . . . . E-18

Table E-12 RF Module Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-19

Table E-13 RF Module-Antenna Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-19

xviii

Before You Be gin

This chapter describes this guide’s purpose and intended audience. It provides a list of topics covered in each section, a list of related documents, and the symbols and typographical conventions used. A discussion on licensing requirements and health limits for radio frequency devices is also included.

Purpose

This guide provides the information necessary for TransCore-certified personnel to successfully inst all an Amtech an electronic toll collection (ETC) site that has been designed and built to use this system.

Intended Audience

Chapter 1

Before You Begin

® IT2200 Reader System wit h Multim ode Capabil ity at

This guide should be used by Tr ansCore-certified personnel who will design, configure, program, and test the Amtech ity in th e fiel d .

Guide Topics

This installation guide contains the following chapters and appendixes:

Chapter 1 – Before You Begin

Chapter 2 – Theory of Operation

Chapter 3 – Overview of the IT2200 Reader System

Chapter 4 – Installing the IT2200 Reader System

Chapter 5 – Tu n ing the Lane

® IT2200 Reader System with Multimode Capabil-

Describes the purpose, intended audience, guide topics, related documentation, and document conventions. Also contained are licensing requirements and health limits for the RFID equipment.

Provides an overview of RFID theory, Amtech technology , and operational characteristics of the IT2200 Reader System with Multimode Capability .

Describes the individual components and their interrelationships.

Provides ins t r u c t ion s for ins t alling the syst em.

Provides instructions for testing and tuning an installed system.

® RFID

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Chapter 6 – Troubleshooting the Installation

Chapter 7 – Preventive Maintenance

Appendix A – Acronyms and Glossary

Appendix B – Block Diagrams

Appendix C – System Technical Specifications

Appendix D – Hardware Interfaces

Appendi x E – Con nector Pin-o uts

Index

Typographical Conventions

The following conventions are used in this manual:

T able 1-1 Typographical Conventions

Convention Indication

This procedure might cause harm to the equipment and/or the user.

Concerns about a procedure.

Before You Begin

Code Code, including keywords and variables within text and as

Dialog Box Title Title of a dialog box as it appears on screen. Function Start with the characters G4 and add mixed case with no

Menu Item Appears on a menu.

Note

NUL Zero-value ASCII character or a zero-value byte. NULL Zero-value pointers are null-terminated strings that refer to

Licensing Requirements

T o opera te a radio frequenc y (RF) system in a give n country, the user must first obtain permission from the regulatory agency that controls radio operations in that country.

separate paragraphs, and user-defined program elements within text appear in courier typeface.

underscores, and include parentheses after the name, as in G4FunctionName().

Auxiliary information that further clarifies the current discussion. These important points require the user’s attention. The paragraph is in italics and the word Note is bold.

strings of printable ASCII characters with a zero-value byte placed in memory directly after the last printable character of the string.

Most countries require type and safety approval, as well as licensing for RF transmitters.

Amtech

® data and literature are available to assist approval and licensing activities.

1-5

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

U.S. Licensing

IT2200 Reader System with Multimode Capability users in the U.S. must obtain a license from the Federal Communicat ions Commission (FCC). The authorized frequency bands in the U.S. are 902 to 904 and 909.75 to 921.75 MHz.

The user is responsible for filing the FCC license according to FCC regulations, but the Amtech these forms.

An FCC license provides the user with the legal authorization to operate the IT2200 Reader System with Multimode Capabil ity on the licensed frequencies at the site specified in the lic en se. O nl y an au thor iz ed insta lle r or serv ice t ech ni ci an can set the IT2200 series of readers’ frequency to that specified in the FCC site license.

The FCC license also provides the user with pr ote ction and authorization to maintain the system should any other RF identification product be used in the licensed area after the IT2200 equipment is instal led.

® dealer should provide assista nc e and support as necessary to complete

Health Limits

Withi n the Unit ed S tates, envir onmental gui deline s regula ting safe exposur e level s are issued by the Occupational Safety and Health Administration (OSHA).

Section 1910.97 of OSHA Safety and Health Standards 2206 legislates a maximum

safe exposure limit of 10 milliwa tts per squa re cent imete r (mW/cm minutes at both 915 and 2450 MHz.

Although not binding, other organizations such as the American National Standards Institute (ANSI) have issued similar guidelines that are more restr ictive than the OSHA limits (ANSI C95.1). ANSI guidelines recommends the following maximum

safe power density in mW/cm

Frequency

-------------------------------------------------------

Thus, the maximum safe power density at 915 MHz is 0.61 mW/cm is a 6-minute average. At 915 MHz, Exclusi on 4.2(2) provides an excl usion of the limits if transmitted powe r is 7 W or less.

The RF power density generated by Amtech antenna gain that is equivale nt to tha t typically used in an IT2200 installation. At 1.0 W transmitted power and a distance of 1 m (3 ft) from the antenna, the maximum

power density recorded was 0.16mW/cm (1.5 ft) from antennas when system is operating.

(in MHz)

1500

® equipment was calculated using an

. Personnel must remain at least 0.46 m

) averaged over 6

. The power limit

1-6

The data confir m that the Amtech does not repr esent an operating hazard to either the general public or maintenance personnel.

® system ef fectively meet s OSHA requirements a nd

Theory of Operation

This chapter provides the theory of operation for radio frequency identification (RFID) systems and describes Amtech

Overview of RFID Theory

The term radio frequency, or RF, describes the electromagnetic waves in the 10-kHz to 10-GHz range. Television, cellular phones, two-way radios, and rada r are among the common technologies using RF energy. Many automatic door-opening systems are also RF based.

Electronic identif ication (EID) systems automatica lly transfer data from an object to the user’s data management system, usually through an optical (barcode or laser), magnetic, or RF link. Radio frequency identification (RFID) provides the benefits of optical and magnetic systems, while overcoming many of their limitations.

Chapter 2

Theory of Operation

RFID technology.

Components

The primary components of a RFID system are

• Readers (scanners, inte rrogators) that process the signal returned by the tag, and

send the tag message to a host computer or control system.

• RF sources ( transmitters/receivers) that generate and send out a radio signal to the

tag and preprocess the signal returned from the tag.

• Antennas that transmit the RF signal into the environment and retrieve the

reflected signal f rom the tag.

• T ags (transponders) that carry unique codes and are attached to objects to be

identified.

An RFID system can include readers, RF modules, an tennas, tags, and software, usually under the control of a host computer (Figure 2-1). Various additional equipment, such as vehicle detectors, gates, and lights, can be include d in the system. Software can be included in a system, usually to process the data gathered from the tags.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Figure 2-1 Typical RFID Components for a Bistatic (Two-Antenna)

Configuration

The core RFID system components are described in the following sections.

Reader

Readers provide an operational link between tagged objects and host information management systems. The reader receives a demodulate d signal from the RF module, decodes the identification information, validate s the identif ic ation code, and transmits the code along with any appended information to the host computer system. The reader also controls the RF module, sending it a command to generate the RF signal.

The reader’s bas ic operation is to

• Direct the RF module to transmit RF.

• Receive the encoded signal from the tag through the RF module.

• Decode the tag’s ID code.

• Validate the ID code.

• Trans mit the ID along with any other data from the tag to the host computer

system.

• Send single or multiple requests to the tag to return data or write to tag memory.

2-4

The reader may also have other functions, including accepting data from other input devices, such as the vehicle detector, and controlling the toll lane gate and signal lights.

Theory of Operation

Permanent programming (fir mware) in the reader controls reader operation. The firmware can accept commands from the user through the host computer system or a local term inal ; thus , the user can customize t he rea der’ s oper ations to the user’s n eeds.

RF Module

The RF module is the RF source. It is mounted with the antennas. An RF module is a radio transmitte r/rece iver that is contr olled by a reader. Upon c ommand from a reader, the RF module generates an RF signal and delivers the signal to one of the antennas for transmis sion . The RF mo dule receives and demodulates the refl ect ed ta g signa l returned through the ante nna (s). It then amplifies and conditions the signal before sending it to the reader.

Antennas

The antenna is the transmitter and/or receiver for the RF. Each RFID system includes at least one transmitting and receiving device, or antenna. In some systems, a single antenna may be used to transmit the RF and receive the encoded RF signal from the tag (monostatic); in others, one antenna transmits the RF and another receives the signal returned by the tag (bistatic).

The sophistication of this device depends on the application and the type of tag used. Antenna type is very im portant f or the appl icat ion; one ty pe of ante nna may tran smit a focused, strong field suitable for highly controlled, high-speed applications such as rail. Another type may tra nsmit a br oad but re lative ly weak fi eld suit able for relat ively open, slower -speed a pplicati ons suc h as ac cess cont rol. Ant ennas may be station ary or mobile, depending upon the application.

Transmission field size, shape, and polarization (directional sensitivity of energy emitted from the antenna) are used to furt her define the reading range to desired specifications.

Each type of antenna transmits RF energy generated by the RF module in a characteristic pattern. The shape of the reading range generated by each antenna can be related dir ectly to the radiation pattern. In the AA3152 Universal Toll Antenna and AA3153 Beacon Antenna, this pattern is balloon shaped (Figure 2-2 and Figure 2-3). This type of antenna is ideal when the read ing range must be relatively symmetrical. When mounted with its elements oriente d horizontally, the AA3152 and AA3153 Antennas are horizonta lly pola rized.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Figure 2-2 Field Size, Shape, and Antenna Polarization Define the Reading

Range (Bistatic Configuration)

2-6

Figure 2-3 Field Size, Shape , and Antenna Polarization Define the Reading

Range (Mo nostatic Configura tion)

Theory of Operation

Host Computer

The host computer must be capable of accepting data from the specific type(s) of reader(s) being used in the system and variable bit formats, while off ering flexibility and expandability. Finally , the host computer must support multi-user, multi-taskin g, and multi-operati ng system environments.

The host computer performs many functions aside from directing the reader(s), such as transferring the dat a receiv ed from t he reader( s) to desig nat ed users, displa ying it in required form , an d arch i ving it for reference.

The host computer may be used to provide other services such as controlling the vehicle detectors, exit gates, and lights at a toll plaza.

Operational Characteristics

The performance of a given electronic identification system varies with the principles of the systems and the details of implementation. The operational characteristics are determined primarily by the following factors:

• Reading range, or the maximum dista nce betwee n the antenna s and tag allo wing a

successful read and/or write transaction

• Maximum speed at which a tag on a moving object can be successfully read

• Number of characters stored in the tag

• Number of char act er s to be w ri tten to the tag

• Coding format of the tag data

• Sensitivity to tag orientation and placement

2-8

• Immunity of the system to noise and interf ere nce

Theory of Operation

• Frequency and power

• T ag lifetime

• Tag read/write accuracy rate

Reading Range

A well-defined readin g range (sometimes called a capture window) is required fo r successful perfor manc e of any ID system. This region is a volume of spac e extending outward primarily fro m the front of the antenna.

T ags outside the reading range do not reflect enough RF signal to be proc essed by the reader. Read/write tags may not receive a strong enough modulated signal from the reader to be able to interpret the command being transmitted.

Reading Speed

Reading speed capability of a system is limited by the need to receive a complete code frame (a tag's en coded message) while the tag is within reading range. B eca use signal reception does not al ways start at the beginning of the tag's message, the system must be designed to receive 10 full code frames to ensure reading an entire message.

Reading speed can be extended by

• Decreasing the number of characters (length of message) stored in the tag

• Increasing the volume of the reading range

Number of Characters Stored in Tag

For the IT2200-series tags, the number of characters stored in the tag consists of 16 pages of 16 bytes (128 bits) for a total of 256 byte s of data.

Number of Characters Written to an IT2200-Series Tag

From 1 to 16 bytes of data can be written to a specified frame during a write command. If you only want to write one byte of data, then that byte has to be t he most significant byte. The IT2200-series tags do not support byte addressing.

Coding Format of the Tag Data

The coding for mat of the data written to the tag var ies depending on tag configuration and customer requirements.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Tag Orientation and Placement

Ideally, in any RFID system, th e tag to be read is oriented such that the polarization of its internal antenna is aligned favorably with the polarization of the system antenna (Figure 2-4).

Figure 2-4 Tag Orientation with Lin e ar Polariz ed Antenna

T ags ca n be mounted on the inside of a vehic le’s windshield or mounted on the licens e plate area of the front of the vehicle.

The surface upon which tags are mounted can affect the tag's performance by directing the refle cted signal toward the transmitting/r eceiving antenna, or in some cases, by reflecting the signal away from the antenna . Interior tags cannot be mounted on metallic surfaces because the metal will interfere with the tag’s operation. Exterior tags can be mounted on metallic or non-metallic surfaces.

Noise and Interference Immunity

Electrical noise and interference, as well as physical obstructions be twe en the tag and antenna, can degrade communications between a tag and the reader system.

Electrical Noise and Interference

Common sources of noise and interference are other communication devices such as TVs, cellular phones, two-way radios, radar , and other tags and readers. Other noise sources include motors, fans, digital equipment, automobile ignition systems, fluorescent lights, and neon signs.

Physical Obstructions

Some types of obst ructi ons o r materi als betwe en the tag and ant enna can c ause lit tle or moderate to substantial interference with the tag signal. Radio waves penetrate nonconducting materi als (such as snow, ice, dirt, wood, paper , plastic, and cured concrete) with only modera te atte nuation.

2-10

Theory of Operation

More conductive materials, such as water (especially salty water) , not only attenuate the RF signal, but can also reflect a portion of the RF energy from the surface of the material, resulting in poor system performance. The amount of refle ction produced is related to the dissimilarity in electromagnetic impedances of adjacent materials.

Multipath and Signal Diffraction

Many fundamental pr opertie s of r adio waves inf luence t he RFI D syst em. Radio wa ves are reflected from dielectric (nonconducting) as well as metallic surfaces. These RF reflections can allow tags outside the antenna's line of sight to be read, and can cause multipath effects as well.

Multipath occurs when two or more favora ble radio paths exist between the tag and antenna. Multipa th ca n cause h igh fie lds ( extend ed reading r ange a reas) and low fiel ds (null regions), which must be taken into account in system configuration .

Signal diffra ction can also affect system performance. Diffraction is the bending of radio waves around an obstacle. The combined effects of signal diffraction and multipath reflections can allow tags to be read under seemingly impossible circumstances.

Frequency and Power

All RFID systems must operate within national and international laws and guidelines with respec t to frequency and power. The common frequency bands available are ne ar 888 MHz, 915 MHz, and 2450 MHz. (The authorized frequency bands in the United States are 902 to 904 MHz and 909.75 to 921.75 MHz.)

Tag Lifetime

The housing and internal elec tronics of the IT2200-series tags, excluding the battery, have an operational life of at least 10 years.

Tag Read/Write Accuracy Rate

By using the specified equipment and system configuration outlined in this chapter, a tag read/write accur acy rate greater than 99.97% has been achieved with the IT2200 Reader System with Multimode Capabil ity.

Amtech® RF Technology

The Amtech® system operates on the principle of modulated backscatter. The system sends an unmodulated RF signal toward the tag, whic h acts as a field disturbance device. The tag signal is varied in a coded fashion so that the tag reflects a coded signal back toward the antenn a at the same fre quency transmitted by the RF module.

Modulated backscatter technology is similar to systems used in air-traffic control and police radar systems, as well as in marine sonar systems.

To provide enhanced lane-to-lane selectivity and the ability to isolate and operate in noisy RF environments, the IT2200 Reader System with Multimode Capability uses backscatter tech nology for tag-to-reader communications. In this system, the reader

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

communicates the initia l polling message to the tag. It then transmits an unmodulated continuous RF wave so that when a tag is within range of the ante nna, it can backscatter its data to the reader. The reader and tag continue this two-way communications until the transaction has been completed. Normally, at this point, the reader transmits an encoded acknowledgment (sign-off) message to the ta g, an d the tag does not respond t o further reader request messages for a programmable period of time—from 1 to 128 second s—allowing the vehic le time to t ravel thr ough the antenna pattern. During this time-out period, the reader starts communications with the next tag in the same lane.

In ATA mode, the tags are read-only and do not use a reader-to-tag modulated signal. When powered, and in the presence of an unmodulated signal, ATA tags always attempt to backscatter.

Signal Transm ission and Acquisition

Amtech® technology uses a single frequ ency, continuous-wave signal, transmitte d from the reader to the tag, and receives an amplitude modulated form of the same signal from the tag. This homodyne system uses a sensitive multi-channel preamplifier to distinguish the return signal from the transm itte d signal.

Automatic Vehicle Identification Transaction Process

Operationally, each tagged vehicle is processed identically whether the toll is collected on a ticket or barrier system, or the lane is a confined plaza lane or an open, high-speed e xpress lane. Typical automatic vehicle identification (AVI) operations are performed as follows:

1. The reader polls for a tag to respond with an identification (ID) number.

2. Once a tag enters the read zone, it responds with its ID number.

3. The reader sends single or multiple reques ts to the tag to return data or write to tag me mory.

4. At the end of the transaction, the reader sends an acknowledge (ACK) message.

5. The tag goes into a time-out state.

6. The reader polls for the next tag.

If the IT2200 tags respond in ATA mode, the tag identif ica tion is read. This completes the transaction.

Types of RFID Transactions

2-12

There are two types of RFID transactions: read-only and read/write. A read-only transaction i s the simple st and co nsists of a tagged it em entering an RF field whe re th e reader queries the tag’s information. The exchange of information is from the tag to the reader , no information is returned to the tag.

Theory of Operation

A read/write transaction consists of the following processes:

• The re ader mod ulat es a mess age to all tags until it receives a response from a sin-

gle tag that has been activated by the reader message

• The reader communicates with that individ ual tag by using the tag’s unique identi-

fication.

• The reader retrieves data from any of that tag’s memory location, and can also

write data to any of that tag’s memory locations.

This process is called read/write because the reader needs to write a message to the tag to obtain a response. The reader can then write data to memory also, if required.

A read/write transaction is more complicated because not only does it entail communication between the tag and a reader, but the reader can also modify information that is stored in the tag memory.

The total transacti on time for this RFID system is less than one-tenth of a second. Within that timeframe, a number of transactions occur. Figure 2-5 shows a timeline for a representative read/write transaction using the IT2200 Reader System with Multimode Capability and an IT2200-se ries tag that is controlled by an IT2200 reader with multimode capabili ty housed in a lane controller.

Figure 2-5 Typical Read/Write Transaction Using the IT2200 Reader System and

an IT2200-series Tag

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Each sequence is equal to one valid transaction, and is composed of six RF data packets. If the amount of time it takes to complete one tra nsaction is equal to the total length of the RF pa yment zone, then, because of a 95% ef f ective RF link coverage, the

probability of comple ting that transaction is 73.51% (.95

). The probability of obtaining each transaction if the RF footprint is greater than the time for one transaction is shown in Table 2-1.

Table 2-1 Time and Distance Req uired to Com plet e Payment Zon e

Number of

Transactions

1 24 ms 0.4 (1.4) 0.7 (2.3) 1.1 (3.5) 73.5092 2 48 ms 0.8 (2.8) 1.4 (4.6) 2.1 (7.0) 98.5093 3 72 ms 1.3 (4.2) 2.1 (6.9) 3.2 (10.5) 99.9250 4 96 ms 1.7 (5.6) 2.8 (9.2) 4.3 (14) 99.9963 5 120 ms 2.1 (7.0) 3.5 (11.5) 5.3 (17.5) 99.9998

Time to

Complete

Payment Zone

Distance to Complete Payment Zone (in

meters (feet))

64 kph (40

mph)

105 kph (65

mph)

161 kph

(100 mph)

The value of 95% RF effective coverage is derived from variables such as nulls and multipath in the RF field because of reflections and various forms of interference. A properly mounted ta g in a vehic le exhibit s a t least t his 95 % value. A 95% c over age for a 3m (10-ft) zone would mean that 0.15 m (0.5 ft) of the 3 m (10 ft) is a null or no RF.

As shown in T able 2-1, the minimum footprints or payment zones f or each la ne to achieve an accuracy of 99.97% are 1.7 m (5.6 ft) at 64 kph (40 mph), 2.8 m (9.2 ft) at 105 kph (65 mph), and 4.3 m (14 ft) at 161 kph (100 mph).

Figure 2-6 illus trates that a minimum of four transactions must be allowed to occur to achieve the required accuracy. The minimum time for these four transactions is 96 ms.

Probability (%)

2-14

Figure 2-6 Four Transactions Can Occur Within 96 Milliseconds

Figure 2-7 shows a timeline for a sample read-only transaction using the IT2200 reader system with Multimode Capability operating in ATA mode and an ATA-type tag.

Theory of Operation

Figure 2-7Typical Read-only Transaction Using the IT2200 Reader System in

ATA Mode Operation with an ATA-Type Tag

Figure 2-8 shows a timeline for a sample read-only transaction using the IT2200 Reader System with Multimode Capabil ity operating in multimode and an ATA-type tag.

Figure 2-8Typical Dedicated Read-Only Tr ansaction Using the IT2200 Reader

System in Multimode Operation with an ATA-Type Tag

Figure 2-9 shows a timeline for a sample read-only transaction using the IT2200 Reader System with Multimode Capabil ity in ATA mode and an ATA-type tag.

2-15

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Figure 2-9Typical Read-Only Transaction Using the IT2200 Reader System in ATA Mode Operation with an ATA-Type Tag

2-16

System Components

Overview

Chapter 3

System Components

This chapter presents an overview of the IT2200 Reader System with Multimode Capability and then describes the individual components of the reader system and their relationship to each other.

The components of the IT2200 Reader System with Multi mode Capability are as follows (Figure 3-1):

• IT2020 Reader Logic Card

• IT2611 RF Module

• AA3152 Universal Toll Antenna (UTA) or AA3153 Beacon Antenna

• IT2502 Check Tag Antenna

• IT2221, IT2211, IT2235, and ATA-type Tags

• IT2410 Tag Programmer

Figure 3-1 Relationship of the IT2200 Reader System Components (Bistatic Installation Shown)

The IT2200 Reader System with Multimode Capability consists of the reader, RF module, antennas, tags, and tag programmer. The reader's RF source is a separate

3-3

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

compone nt. The rea d er bro adcas t s RF en ergy ov er an adjus t abl e area called the read zone or reader footprint. The tag on the vehicle reflects a small part of this RF energy back to the antenna. The reflecte d radio waves denote the tag's unique identification code and other stored data.

The antenna relays the signal to the reader, which can add information such as date/ time to the tag's identific ation code, and stores it in a buffer. The reader can transmit the tag's identific ation code to the customer's information management system. The entire process take s only milliseconds.

The IT2020 Reader Logic Card is housed within a lane controller or PC chassis, eliminating the need for a stand-alone reader. The reader logic card uses applicationspecific software to communicate with the lane controller or host computer. All reader commands and logic functions are inc orporated into a single IT2020 Reader Logic Card.

The IT2611 RF Module is connected to and works in conjunction with the IT2020 Reader Logic Card to provide two-way RF communications with tags. It is mounted near the antennas to reduce signal losses to and from the antennas. The RF module attaches to the antenn as w i th low-l os s coax ia l cables .

The antennas, along with the RF module, provide the radio signal required to achieve the bidirectional wir eless communications link between the tag and the reader.

A check tag is a special purpose tag that can be permanently installed in an antenna or is installed near an ante nna that doe s not have an internal check tag. For the IT2200 Reader System, the check tag is integrated into the RF module and has a separate check tag antenna.

The check tag can simulate a toll tra nsaction, thereby pr ovi ding a means for the reader to check the system operation. The check tag, activated on command by the lane controller or host compute r, provides a test of the ant enn as, RF source, preamplifier , encoder/decoder, microprocessor, communications port, and input/output (I/O) control.

The IT2502 Check Tag Antenna is used to communicate with a check tag that is located inside the RF module. The check tag ant enna is placed directly in front of the transmit antenna.

IT2200-series tag s are self -contained RFID devices that are capable of bidir ectional communications with a reader. ATA tags are read-only that communicate from tag to reader. Tags are available for interior or exterior installation.

The IT2410 Tag Programmer is used to read data from and write data to tags used in an RFID system.

Each of the system components liste d above is des cribed in detail in this chapter.

3-4

IT2020 Reader Logic Card

The IT2020 Reader Logic Card is a full-size ISA card, bus-operated, modular component (see Figure 3-2). The IT2020 Reader Logic Card communicates with a governing device, such as a lane controller or personal computer (PC), using application- specific software. Readers co ntrol the two-way communications with any tags that are compatible with the IT220 0 protocol. All reader commands and logic functions are incorpor ated into a single IT2020 Reader Logic Card. The IT2020 Reader Log ic Card is hou sed with i n a lane co n tro ller or PC chassi s , elim in ating the need for stand-alone readers. The IT2020 Reader Logic Card requires two adjacent slots in the host PC.

System Components

Figure 3-2 IT2020 Reader Logic Card

Functions

The IT2020 Reader Logic Card establishes a direct interface with the lane controlle r or PC and acts as a switchboard for communicati ons between the ground-based electronics and the mobile tags. The instructions executed by the reader logic card determine the data flow and processing rates and perform read-only and read/write transactions with tags.

The reader communicates with the tags over a radio frequency (RF) communications link generated by t he RF modul e and t ransmitted by the ant enna. The communicati ons link uses a protocol spe cifically de signed to minimi ze tr ansacti on ti me and provi de the

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

most flexible set of capabilities available in electronic toll collection (ETC) equipment.

Features

The IT2020 Reader Logic Card provides the following features:

• Program memory—The reader logic card contains 2 MB of flash memory.

• Data memory—The reader logic card contains 1 MB of RAM.

• Battery-backed data memory—The reader logic card uses battery backup to

preserve data in the event of a power loss for 512K of SRAM in Bank1.

• Password s ecuri t y—T h e read er logi c car d contai n s circ u itry to en cryp t /d ecry pt

the tag password.

• Direct access protocol—The reader logic card uses this protocol to communicate

with a target tag even if many tags are present between the target tag and the reader.

• Internal synchron ization—Multiple readers can be placed in close proximity

without requiring RF synchronization by the lane controller.

• Extensive self-diagnostic capability— Extensive self-diagnostics are built into the

hardware an d soft w are .

• Expandable for future options—Both hardware and firmware features can be

expanded in the reader.

• Processor—The process ing is based on the Motorola MC68EN360

microprocessor.

• Frequency operatio n—The reader operates in the 902 to 904 MHz and 909.75 to

921.75 MHz bands.

• Multiple tag—The reader with multimode capability can read IT2200-series tags

alone, ATA tags alone, and/or a mixed population of IT2200-series and ATA tags.

• FCC compliant—The reader is Part 15 verified and Part 90 type accepted.

• Host interface—The host int erf ace is a 16-bit ISA interface.

By using the reader logic card approach, as opposed to a stand-alone reader, the user can employ available ISA card slots in existing lane controllers. This approach eliminates or diminishes expense s associat ed with stand-alone reader packaging, suc h as additional power supplies, electrostatic discharge (ESD) protection, and more robust environmenta l design factor s, which requ ire more expensi ve component s and a higher level of maintenanc e.

3-6

Additionally, the IT2020 Reader Logic Card is designed for integration into an industrial-le vel processor, such as a host computer or lane controller.

System Components

Because the IT2020 Reader Logic Card is integrated into the lane controller or host computer, lightning protection is unnecessary at the reader logic card; however, lightning protection is provided with the RF module. The RF module is contained in the vicinity of the antenna housing for simplified installation and maintenance. External signals are optically isolated to ensure that any potentially damaging transients do not propagate into the reader. A block diagram of the IT2020 Reader Logic Card is shown in Figure 3-3.

Figure 3-3 IT2020 Reader Logic Card Block Diagram

The reader logic c ard acts as the carri er for industry pac k (IP) modules that expand th e reader’s functionality. The IP modules are expansion boards that interface to other processing, status, and control components, such as the RF module. One spare IP slot allows for an additional module to interface with the reader logic card.

IT2611 RF Module (Bistatic and Monostatic)

The IT2611 RF Module communicates with the IT2020 Reader Logic Card and the antennas to provide two-way RF communications with tags. It is mounted near the antennas to reduce signal losses to and from the antennas.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

The RF module housing consists of the following components:

• Fiberglass encl os ur e

• Bulkhead Type N connectors for antenna connections

• Bulkhead circular waterproof connectors for power and interface

• Stainless steel mounting hardware

The RF module connects to a 19- to 28-VAC or 16- to 28-VDC power source and interfaces back to the lane controller and the IT2020 Reader Logic Card. These connections are ill ustrated in Figure 3-4 (bistatic) and Figur e 3-5 (monostatic).

3-8

Figure 3-4 IT2611 RF Module Connections (Bistatic Configuration)

System Components

Figure 3-5 IT2611 RF Module Connections (Monostatic Configuration)

The interface connector connects to the reader logic card to supply tag data information and communicat ion to the RF module.

RF Module Connections

Connections to the IT2200 Rea der System devic es are made through connec tors at the front of the RF module.

Transmit Connector (Bistatic RF Module)

This Type N RF connector connects the RF module to the transmitt ing (downlink) antenna through a short low-loss coaxial RF flexible cable.

Receive Connector (Bistatic RF Module)

This Type N RF connector connects the RF module to the receiving (u plink) antenna through a short low-loss coax ial RF flexible cable.

Transmit/Receive Connector (Monostatic RF Module)

This Type N RF connector connects the RF module to the transmitt ing/receiving antenna through a short low-loss coaxial RF flexible cable.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Check Tag Connector

This Type N RF connector links the check tag, which is housed inside the RF module and is used to test the reader system, to its accompanying antenna.

Data Connector

This connector li nks the RF module to t he reader logic card. Data tra nsfer betwe en the reader logic card and the tag occurs through this data connector. The interface to the reader logic card is connected using the RF module interface connector.

Power Supply Connector

This connector provides the primary power for the RF module. The power inte rface is 19 to 28 VAC or 16 to 28 VDC. It typica lly connec ts t o a power sup ply in the host l ane controller syst em.

Functions

The RF module sends the RF signa l to the antenna, recei ves the modulated tag signal, demodulates, amplifies, and filters the received tag signal, then forwards the digital data to the reader for processing. This technique is known as modulated backscatter. The RF module transmits the modulated sig nal at a reader-set discrete frequency within the 902- to 904-MHz and 909.75- to 921.75-M Hz frequency bands. The transmitted signal is the n received by a selected tag that backscatters or re-radiates the signal and modulates the sign al to refle ct tag information.

Features

The RF module features include the fol lowing:

• FCC Part 90 type accepted and Part 15 verified

• Two RF sources, one to downlink (write) and one to uplink (read)

• Programmable RF—The transmitted carrier frequency can be adjusted. However,

this can be performed only by trained, au thorized dealers or service personnel.

• Programmable RF power —Programmable control of RF output power is possi ble.

• RF operation—Two-antenna (bis tatic) operation for enhanced perfor mance

• Phase-lock loop (PLL) synth esizer with 250-kHz steps programmable

• One-watt (W) maximum power output to each channel (downlink and uplink)

• Power attenuation is progr ammable in 1dB steps to -15dB by digital-to-analog

converter control of each chann el

• Check tag integrated int o RF module with separ ate check tag antenna

• Three-channel differential receiver with pre-amplifier

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System Components

• Interface-to-ISA reader logic board used to control RF module sources and

functions

The generated RF levels fall well below IEEE C95.1- 1991 a nd international health limits. The RF module transmits radio energy at a fixed frequency and is cla ssified as a low-power radio transmitter. Maximum peak RF power is 1W for each channel— less than the power generate d by many common radios, including ham radios and citizen band radios.

A PLL crystal-controlle d oscillator of the RF module makes degradation over time unlikely. The PLL is resistant to te mperature, humidity, and power fluctuations. Trans mitter failure does not result in the generation of more than the maximum specified power output of 1 W.

Type Testing

The RF module has passed testing for type accep ta nce of FCC Part 90 as a location and monitoring service tr ansceiver and verification of FCC Part 15 as Class A equipment, unintentional radiator. The end user will be required to obtain and maintain site licen ses.

RF Emissions

To confine the read/write coverage to a single lane, the RF module can be adjusted to emit much less than the maximum 1 W. Depending on the particular installation site, typical RF emission is an estimat ed 0. 05 to 0.5 W. The RF module connects to an automatic vehic le identi fi cation a ntenna tha t has a gain o f approxi mately 10. 5dB. Th is gain produces energy levels and specific absorption rates far be low IEEE C95.1-1991specified limits at any point around the antenna.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

T able 3-1 shows the downlink and uplink specifications.

Table 3-1 IT2611 RF Module Uplink and Downlink Specifications

Description Specification Comments

Downlink frequency selection Adjustable from 912 to 918.75

MHz

Downlink frequency stability ≤20 ppm Minimizes lane-to-lane

Downlink frequency control step size ≤250 kHz N/A Downlink RF power output 1 W maximum Minimum attenuation/

Downlink RF power control 0 to ≥15dB

attenuation control

Downlink RF power control steps 1dB nominal N/A Downlink modulation depth/spectrum Tailored to meet tag

requirements

Uplink frequency selection Adjustable from 902 to 904

MHz and from 909.75 to

921.75 MHz

Uplink frequency sta bilit y ≤20 ppm Minimizes lane-to-lane

Other frequencies locked out by software control. Set by qualified technicians at the time of installation.

interference for ATA tag mode.

Maxim um gain Set by host computer

command; facilitates lane tuning

An example is Title 21

Other frequencies locked out by software control. Set by qualified technicians at the time of installation.

interference for ATA tag

mode. Uplink frequency control step size ≤250 kHz N/A Uplink RF power output (transmit) 1 W maximum N/A Uplink RF power control (transmit) 0 to ≥15dB attenuation Set by host computer

command; facilitates lane

tuning Uplink RF power control steps

(transmit)

1dB nominal N/A

3-12

Antennas

System Components

The antennas transmit and rece ive the radio signal generated by the RF module and receive the backscatter signal from the tag.

The IT2200 Reader System with Multimode Capability uses either a pair of AA3152 or AA3153 Antennas for bistatic con figuration or a single AA3152 or AA3153 Antenna for monostatic configuration depending on the install ation. The AA3152 Antennas are used in overhead inst allations and AA3153 Antennas are used in sidemount installations.

Ideally, in any RFID system, th e tag to be read is oriented such that the polarization of its internal antenna is aligned favorably with the polarization of the system antenna. Figure 3-6 illustrates the linear polarization of an antenna and tag.

Figure 3-6 Tag Orientation with Lin e ar Polariz ed Antenna

AA3152 Universal Toll Antenna

The IT2200 Reader System with Multimode Capability uses either one or two AA3152 Universal Toll Antennas (UTA) for overhead and gantry plaza installations.

Functions

In a monostatic configuration, the AA3152 UTA acts as the downlink antenna transmitting signa ls to the tag, and also acts as the uplink antenna receiving signals from a vehicle tag. In a bistatic configuration, an AA3152 UTA acts as the downlink antenna transmitt ing signals to the tag, and another AA3152 UTA acts as the uplink antenna receiving signa ls from a vehicle tag.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Features

This antenna is specifi cally designed for use in toll lane applicati ons, and it transmits and receives RF signals in the 902- to 928-MHz RF range. The AA3152 UTA transmission patt ern has virtually no side or back lobes, which helps to confi ne antenna coverage to a single lane width. The antenna is enclosed in a weatherproof radome, which is made of materials selected for favorable electrical characteristics and resistance to ultra violet radiation.

The AA3152 UTA is designed for outdoor use. The antenna operates without performance degradation in hot or cold temperature extremes, strong wind, or vibrations caused by pass ing vehicles.

AA3153 Beacon Antenna

The IT2200 Reader System with Multimode Capability uses either one or two AA3153 Beacon Antennas for pillbox-type plaza installations.

Functions

In a monostatic configuration, the AA3153 Beacon Antenna acts as the downlink antenna transmi tting sig nal s to the tag, and the upl ink a ntenna r eceivi ng sig nals f rom a vehicle tag. In a bistatic configuration, an AA3153 Antenna acts as the downlink antenna transmitt ing signals to the tag, and another AA3153 Antenna acts as the uplink antenna receiving signals from a vehicle tag.

Check Tag

Features

This antenna is specifically designed for use in toll lane applications, and transmits and receives RF signals in the 902- to 928-MHz RF range. The AA3153Antenna broadcast patter has virtually no side or back lobes, which helps to confine ante nna coverage to a single lane width. The antenna is enclosed in a weatherproof radome, which is made of materials selected for favorable electrical characteristics and resistance to ultraviolet radiation.

The beacon antenna is designed for outdoor use. The antenna operates without performance degradation in hot or cold temperature extremes, strong wind, or vibrations caused by pass ing vehicles.

IT2502 Check Tag Antenna

The IT2502 Check Tag Antenna is used to communicate with the check tag that is located inside the RF module.

A check tag is a special-purpose tag that is integrated in the RF module and has a separate check tag antenna.

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Tag Programmer

T ag programmers are used to write data to and read data from tags that are use d in an RFID system .

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

IT2410 Tag Programmer

The IT2410 Tag Programmer1 is part of a system that is used to program IT2200series tags (F igure 3-12). The IT2410 Tag Pr ogrammer cannot program ATA tags.The IT2410 Tag Programmer can be used to select a number of standard formats or develop a unique, customized format to meet specific application needs.

3-24

Figure 3-12 IT2410 Tag Programmer System

Functions

Programmer functi ons include programming tag data pages, locking fixed data pages, and interrogating all data pages. T a g data pages can be easily programmed and locked with a password.

Transferring programmed data to the tag is simple. Once the code is downloaded or entered into the host, the user issues a command to initiate code transfer to the tag programmer. The programmer then automatically transfers data to or reads data from the tag.

1. For complete installation and programmi ng ins tructions for the tag pr ogrammer, refer to Amtech

® document Intellitag IT2000 Programmer User Guide (Document No. 411013).

System Components

The tag programmer is connected to a PC port that complies with the RS-232 communications interface standard.

Features

The programming hea d on the top of the programmer provides a mechanical interface to the tag. The programming head includes a drop- in tag well that is compatible with the IT2200-series tags. By placi ng the tag in the tag well on the head, the tag is correctly positioned to the programmer’s inter nal antenna. Figure 3-13 illustrates the tag programming head.

Figure 3-13 Tag Programming Hea d

The IT2410 Tag Programmer includes a simple inte rface that is compatible with computing equipment used i n ho st com puter s. The link be twee n the programmer and a patron account workstati on is provided by an RS-232 communications por t running at 19200 bps. The programmer is de signed to r ead from and wr ite to a tag at dis ta nces up to 5.08 cm (2 in) from the programmer head. The IT2410 T a g Programmer provides a highly reliable and focuse d RF pattern for programming only the tag on the programming head without inte racting with any other tags in the area. The RF transmission of the progra mmer is active only during the read/write operation.

All control and monitor accessories are easily available to the user from the outside of the programmer.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

As shown in Figure 3- 13, all indicators are located on the top face of the programmer. The functional indica tors of the tag programmer are listed in Table 3-4.

Table 3-4 IT2410 Tag Programmer Indicator LEDs and Descriptions

Indicator LED Description

PROGRAM (GREEN)

VERIFY (GREEN)

ERROR (RED) The tag programmer has detected an error in the programming

POWER (GREEN)

READY (GREEN)

The tag is being programmed with user-specified data.

The tag programmer has read valid data from the specified tag frame.

or verifying process or during other operations. Power is being supplied to the tag programmer.

The tag programmer is ready to accept commands from the PC.

The tag programmer also has the following features:

• FCC compliant—The programmer has been tested and found to comply with the

limits established by the FCC for a Class A computing device.

• AC power—The programmer is powered from a standard 120 VAC outlet. A UL-

approved 12 VDC power module is included.

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Installing the IT2200 Reader System

Chapter 4

Installing the IT2200 Reader System

This chapter includes information on:

Assessing the Site — Instructions for conducting an RF survey of the chosen site and formulating a frequency plan.

Preparing the Site — Checklist of tasks involved in preparing a site for installation.

Installing the System — Checklist of required components and a checklist of installation tasks. Description of where to mount the reader system components for several typic al site configurations. Step-by-step inst r u ctions fo r i n stalling the sy stem.

Assessing the Site and Formulating a Frequency Plan

Perform an RF site survey to check for RF noise sources near the toll plaza or toll lane being installed . Use a spec tr u m anal y zer and a horizontally pol arized whip antenn a. (TransC ore recommends a Agilent Technologies Model 8523 spectrum analyzer.)

• Set up the tes t equipment under the pla z a canopy , if possible, or within a 15m (50-

ft) radius of the plaza.

• Record any frequencies operating in the 902 to 904 MHz or the 909.75 to 921.75

MHz bands.

• If you find frequencies within these bands, check the power level. Power levels

exceeding -10dBm could possib ly alter the consideration of install ing the system at this site or the freque n cy plan fo r the sy stem . Con s ul t wi th Amt ec h encounter this problem.

Formulate a frequency plan for the plaza. There are two frequencies for each reader: downlink (reader -to-tag communication) and uplink (tag-to- rea der response). For this system, all readers share the same downlink frequency, which is generally set to

918.75 MHz. Uplink frequencies should alternate between adjacent lanes. For example, a four-lane plaza would have the frequencies shown in Table 4-1.

® if you

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Table 4-1 Example Frequency Plan for Four-Lane Plaza

Lane D ownlink Frequency Uplink Fre quency

1 918.75 MHz 903.00 MHz 2 918.75 MHz 912.00 MHz 3 918.75 MHz 903.00 MHz 4 918.75 MHz 912.00 MHz

Site Preparation Checklist

Prepare the site according to the design parameters determined by your system inte grator. Some of the tasks you should complete, depending on the individual site, are

Acquire a construction license.

Acquire an FCC license.

Acquire an environmental assessment permit.

Ensure that you have assembled all the lights, buzzers, and vehicle detectors that will in t er face w it h the s y ste m.

Ensure that you have software that allows a PC or laptop to interface with the reader firmware.

Pull communications, coaxial, and power cables through outdoor-grade conduit.

Ensure that construction work required for mounting the equipment is completed.

Ensure that 120 V AC service is available.

Components Checklist

Ensure you have the following components available for each lane to be installed:

IT2020 Reader Logic Card

One or two AA3152 or AA3153 antennas (depending on whether the installation is monostatic or bistatic, and plaza type)

IT2502 Check Tag Antenna

IT2611 RF Module

4-4

One or two RF-grade coaxial cables with Type N connectors to link the antennas to the RF module (depending on whether installation is monostatic or bistatic)

Tag data/control cable (data cable) to link the RF module to the reader logic card. The cable must have a DB-25 plug connector and a 26-pin circular socket connector (Souriau 851-06RJ16-26S50 or equivalent).

Task Checklis t

This checkli st su mm ari ze s th e insta l latio n procedure. Inst ruct i on s for eac h tas k are provided in the “Instal ling the IT2200 Reader System” section later in this chap ter.

Installing the IT2200 Reader System

Test data cable for proper continuity and isolation. Install reader logic card in host computer. Connect data cable to reader logic

card. Mount RF module. Connect either 19 to 28 VAC or 16 to 28 VDC power to RF

module. Verify voltage with RF module powered (loaded voltage measurement). Proper voltage is 19 to 28 VAC or 16 to 28 VDC.

Connect data cable to RF module. Mount transmit and receive antennas (bistatic installation) or transmit/receive

antenna (monostatic installation), and check tag antennas. Connect antenna(s) to RF module.

After installi ng a reader system in each lane, it is necessary to tune each lane as described in Chapter 5, “Tuning the Lane.”

Where to Mount the Components

The location for mounting the compone nts is designated in the site installation plan. Most Electronic Toll Collection (ETC) site layouts are similar. Four typical mounts are the canopy, overhead gantry, overpass, and cantilever arm mounts. A fifth configuration is the laneside or pillbox antenna mount.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Canopy Mount

The canopy mount is typically used for covered toll plazas. The reader logic card is installed in the host computer. The RF module, Universal Toll Antenna (s) (UTA), and check tag antenna are attached to a 5.0 to 7.6cm (2- to 3-i n) pipe that is supported from the plaza canopy. The pipe is located approximately 4.5 to 5.5 m (15 to 18 ft) above the r oad surface and 1.8 m (6 ft) downstream of the collection point. The collection point is the centerline of the toll booth door, coin basket, or light curtain, depending on the site configuration. Figure 4-1 illustrates a typical canopy mount.

4-6

Figure 4-1 Ca n opy Mount

Installing the IT2200 Reader System

Overhead Gantry Mount

In the overhead gantry mount, the read er logic card is installed in the host computer, and the RF module, UTA(s), and check t ag antenna are attached to a 5.0- to 7.6- cm (2to 3-in) pipe that is supported from a gantry that spans the lanes. These components are mounted approximately 4.5 to 5.5 m (15 to 18 ft) above the road surface. Figure 4-2 illustrates a typical overhead gantry mount.

Figure 4-2 Ove rhead Gantry M ount

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Overpass Mount

In the overpass mount, the reader logic card is installed in the host computer, and the RF module, UTA(s), and check tag antenna are at tached to a 5.0 to 7.6cm (2- to 3-in) pipe that is supported from an overp ass. These components are mounted approximately 4.5 to 5.5 m (15 to 18 ft) above the road surface.

Figure 4-3 Overpass Mount

4-8

Installing the IT2200 Reader System

Cantilever Arm Mount

In the cantilever arm mount, the reader logic card is installed in the host computer, and the RF module, UTA(s), and check tag antenna are attached to a 5.0 to 7.6cm (2- to 3in) pipe at the end of the cantilever arm. These components are mounted approximately 4.5 to 5.5 m (15 to 18 ft) above the ro ad surface. Figur e 4-4 il lustrate s a typical bistatic laneside cantilever arm mount with two antennas.

Figure 4-4 Cantilever Arm Mount (Bistatic Configuration)

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Figure 4-5 illustra tes a typical monostatic laneside cantilever arm mount with one antenna.

Figure 4-5 Cantilever Arm Mount (Monostatic Configuration)

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Installing the IT2200 Reader System

Laneside “Pillbox” Mount

The laneside mount is typically use d with the AA3153 Beacon Antenna for pillbox installati ons. The reader logic card is installed in the host computer. For bistatic configuration, the receive antenna is mounted on a horizontal section of 5.0 to 7.6cm (2to 3-in) wide by 56-cm (22 in) long horizontal pipe mounted 3m (10 ft) above the ground on a vertical pole. The transmi t antenna is mounted to a horizontal section of 76cm (30-in) long pipe that is 69 cm (27 in) below the upper pipe. The check tag antenna is m ounted next to the transmit ante nna. The RF module can be mounted next to the antenna s or in a shel tered lo cation ne arby. F igure 4-6 illustr ate s a typica l bi static laneside mount.

Figure 4-6 Bistatic Laneside Mount

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

For monostatic configurati on, the transm it/rec eive antenna is mounted on a horizontal section of 5.0 to 7.6cm (2- to 3-in) wide by 56cm (22-in) long horizontal pipe mounted 3m (10 ft) above the ground on a vertical pole. The check tag antenna is mounted next to the transmit/rece ive antenna. The RF mo dule can be mounted next to the antenna or in a sheltered location nearby . Figure 4-6 illustrates a typical monostatic laneside mount.

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Figure 4-7 Monostatic Laneside Mount

The exact placement of the antenna for a pillbox installation depends on the site configuration. The placement is the same for both bistatic and monostatic configurations. Figure 4-8 shows the antenna placement for a typical pillbox installation.

Installing the IT2200 Reader System

Figure 4-8 Antenna Placement for Pillbox Mount

Installing the IT2200 Reader System

This section contains instructions for installing each component of the reader system. In addition to standard tools, you need the following equipment to install the system:

• Wrist str ap for electrostatic discharge (ESD) protection

• Hydraulic lift

• To rque wrench

• Inclinometer

• Multimeter, Fluke 87 or equivalent

• Loopback connector for testing data cable. Use a DB-25 connector to make the

loopback connector. Short the pins listed in Table 4-2. Refer to Table D -13, “LEDs,” on page 18 in Appendix D to this manual for a complete listing of IT2611 RF Module-to-IT2020 Reader Logic Card interface connector pin-outs.

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IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Table 4-2 Listin g of Sh orted Pi ns for Loo pback Connect o r

1 - 15 3 - 14 4 - 18 6 - 17 8 - 22 9 - 20 11 - 25 12 - 23

Installing the IT2020 Reader Logic Card

This section desc ribes the installation of the IT2020 Reader Logic Card in a host computer or lane cont roller. Details of install ation may vary slightly d epending on the site configuration.

Caution

W ear a wrist strap when handling and inst all ing the reader logi c card. Failure to do so can result in ESD damage to the card.

Figure 4-9 shows a reader logic card installed in a typical host computer or lane controller chassis. Because of its daughterboard and two connector panels, the reader logic card occupies two slots. One ISA slot provides power and communications through the card’s edge connector and provides access to the frequency mode switch and RS-232 port on the back of the card. The other slot provi des space for the RF module interface.

4-14

Figure 4-9 IT2020 Reader Logic Card Installed in Typical Host Computer or

Lane Controller Chassis (top view)

Installing the IT2200 Reader System

To install the reader logic card

1. Connect the loopback connector to the data cable, then test the cable for

continuity and isolation.

2. Remove the reader logic card, which is still in its ESD protective bag, from the

shipping box.

3. Put on the protective wrist strap; be sure it is properly grounded.

4. Remove the reader logic card from the ESD protective bag.

5. Verify tha t dipswitc hes S 2, S3, and S4 a re sti ll set t o the f actory sett ings s hown in

Figure 4-10. Refer to page D-3 in Appendix D to thi s document for conf iguration settings information.

Figure 4-10 IT2020 Reader Logic Card Factory Dipswitch Settings

6. Set the frequency-enable switch (S1) to the left (normal) position as shown in

Figure 4-11.

4-15

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Figure 4-11 Frequency Enable Switch on Rear of IT2020 Reader Logic Card

7. Locate the bat tery jumper (might be on J8 or be loose in the ESD bag) a nd install

over both J8 pins (see Figure 4-12).

4-16

Figure 4-12 Location of Battery Jumper (J8) in Relation to Battery

8. Turn off the host computer.

9. Insert the reader logic card in an ISA slot in the host computer. Be sure the card’s

edge connect or is fi rmly se ated , the n secur e the car d with the ret ainin g sc rew.

10. Insta ll the read er logi c ca rd ’s RF interface con n ecto r in a slo t next to the rea d er

logic card, then secure the conn ector with the retaining screw.

11. Do not turn on the host computer until ready to test the system as described in

Chapter 5.

Installing the IT2200 Reader System

Installing the IT2611 RF Module

The IT2611 RF Module should be mounted on a 5.0 to 7.6cm (2- to 3-in) pipe. A mounting kit is provided with each RF module that includes:

• RF module

• Two U-bolts

• Two brackets

• Four spacers

• Eight nuts

• Four lock washers

• Shrink tubing

Figure 4-13 shows the correct way to mount the RF module.

4-17

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

4-18

Figure 4-13 IT2611 RF Module Mounting and Components for Both Monostatic

and Bist at ic C o nf ig urations

Installing the IT2200 Reader System

To install the RF module

1. Locate the RF module atop the mount ing pipe and inse rt a U-bolt around t he pole

and up through the bracket. Place a space r over each section of the U-bolt protruding through the bracket and place a lock washer and nut over each side of the U-bolt. Repeat for the other U-bolt.

Note: Depending on pole diameter, spacers may or may not be needed.

2. Tighten nuts with torque wrench to 68 N-m (50 ft-lb). Tighte n second nut over

first nut to lock it in place.

3. Check that 19 to 28 VAC or 16 to 28 VDC power is available at the module end

of the power cable. Measure the voltage across pins A and C of the power cable connector.

4. Connect the power cable to the RF module’s power supply plug (Figure 4-14).

5. Connect the data cable to the RF module’s data connector.

Figure 4-14 IT2611 RF Module Connectors (Monostatic RF Module Shown)

Installing the AA3152 UTA

The UTA is mounted on a 5.0 to 7.6cm (2- to 3-in) pipe to accommodate various angles for lane tuning. Two UTAs are required for each dedicated or mixed-use lane in a bistatic configur ation. One UT A is required for each dedicated or mixed-use lane

4-19

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

in a monostatic configuration. A mounting kit is provided with each antenna that includes:

• Antenna

• Two U-bolts

• Two brackets

• Four spacers

• Eight nuts

• Four lock washers

• One length of heat-shrink tubing

Figure 4-15 shows the correct way to mount and connect a UTA.

4-20

Figure 4-15 AA3152 UTA Mounting and Connections

Note: When installing the UTA use only the mounting har dware provided. Do not use oversized washers to secure the plastic radome to the bracket. This practice can weaken the ra dome material.

Installing the IT2200 Reader System

To install the UTA

1. Locate the UTA that will be used as the transmit anten na below the mounting

pipe and insert a U-bolt around t he pole and down thr ough t he bracket on the sid e of the antenna closest to the cent er of the lane. Place a lock washer and nut over each side of the U-bolt, but do not tighten the nuts. Repeat for the other U-bolt, but install two of the supplie d spacers between the bracket and the antenna to angle the anten na tow a rd the cent er o f the lan e.

2. For bistatic installation, mount the second UTA the same way, but mount it on

the other side of the RF module from the transmit antenna and do not add spacers.

3. Rotate each antenna up and toward oncoming traffic. Rotate up 15° from

horizontal for a dedicate d lane or 10° up for a mixed-use lane. Use an inclinom eter to ch ec k th e angle.

4. Tighten nuts with torque wrench to 68 N-m (50 ft-lb).

5. Slide the shrink tubing over the coaxial cable, but do not heat it.

6. Connect the coaxial cable to the antenna and to the appropriate connector on the

RF module. Leave the shrink t ubing loose until you have finis hed tuning the lane.

Installing the AA3153 Beacon Antenna

Two beacon antennas are required for each lane in a bistatic configuration. One beacon antenna is required for each lane in a monostatic configuration.

A mounting kit is provided with each antenna that includes:

• Antenna

• Two U-bolts

• Two brackets

• Four spacers

• Eight nuts

• Four lock washers

• One length of heat-shrink tubing

Figure 4-16 shows the correct way to mount an AA3153 antenna.

4-21

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

4-22

Figure 4-16 AA3153 Beacon Antenna Mounting

Note: The location an d posit ionin g of the beac on ant enna(s) can v ary de pending on the site configuration. These instructions provide a starting point that will work for many typical installations.

To install the beacon antenna

1. Locate the antenna along the mounting pipe and inser t a U-bolt around the pole

and through the bracket. Place lock washer and nut over each side of U-bolt. Repeat for the other U-bolt.

Note: For installations requiring horizon tal polarization, mount the beacon antenna with the Amtech polarization, rotate the antenna 90° so that the Amtech horizon.

® label horizontal to the horizon. For installations requiring vertical

® label is pe rpendicular to the

Installing the IT2200 Reader System

2. Rotate the ant enna 10° down from vertical. For a pi llbox mount, aim the antenna

toward oncoming traffic as shown in Figure 4-8. If there is no pillbox, rotate the antenna 45° toward oncoming traffic. Use an inclinometer to check the angle.

3. Tighten nuts with torque wr e nch to 68 N-m (50 ft-lb) to pr event slippage.

Tighten second nut over first nut to lock it in place.

4. Slide the shrink tubing over the coaxial cable, but do not heat it.

5. Connect the coaxial cable to the antenna and to the appropriate connector on the

RF module. Leave the shrink t ubing loose until you have finis hed tuning the lane.

Installing the IT2502 Check T ag Antenna with a UTA

For bistatic configuration, ins tall the check tag antenna on the mounting pipe between the transmit and receive antennas. For monostatic configuration, install the check tag antenna on the mounting pipe next to the transmit/receive antenna. Figure 4-17 shows the correct way to mount a check tag antenna.

Figure 4-17 IT2502 Check Tag Antenna Mounting

4-23

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

To install the check tag antenna

1. Locate the check t ag ante nna along the mounting pipe and insert a U-bo lt around

the pole and through the bracket. Place lock washer and nut over each side of Ubolt. Repeat for the other U-bolt.

2. For bistatic configu ratio n, adjus t the check ta g ante nna so it is about 2. 5 cm (1 in)

from and centered on the transmit antenna. It should extend across about one third of the transmit antenna’s width.

3. For monostatic configurat ion, adjust the check tag antenna so it is about 2.5 cm

(1 in) from and centered on the transmit/receive antenna. It should extend acros s about one third of the transmit /receive antenna’s width.

4. Tighten th e nuts with a torque wrench to 68 N-m (50 ft-lb). Tighten a second nut

over the first nut to lock it in place.

5. Slide the shrink tubing over the check tag antenna cable, but do not heat it. Leave

the shrink tubing loose until you ha ve finished tuning the lane.

6. Connect the cable to the check tag antenna connect or on the RF module. See

Figure 4-14 for the location of the RF module connectors.

Installing the IT2502 Check T ag Antenna with a Beacon Antenna

Install the check tag antenna on the same mounting pipe as the transmit antenna (bistatic configur ation) and transmit/receive antenna (monostatic configuration). Figure 4-17 shows the correct way to mount a check tag antenna.

To install the check tag antenna

1. Locate the check t ag ante nna along the mounting pipe and insert a U-bo lt around

the pole and through the bracket. Place lock washer and nut over each side of Ubolt. Repeat for the other U-bolt.

2. For bistatic configu ratio n, adjus t the check ta g ante nna so it is about 2. 5 cm (1 in)

from the transmit antenna and extends across about one third of the transmit antenna’s width.

3. For monostatic configurat ion, adjust the check tag antenna so it is about 2.5 cm

(1 in) from the transmit/r eceive ant enna and extends acros s about one third of the transmit/rec eive antenna’s width.

4. Tighten nuts with torque wrench to 68 N-m (50 ft-lb) to prevent slippage.

Tighten second nut over first nut to lock it in place.

5. Slide the shrink tubing over the check tag antenna cable, but do not heat it. Leave

the shrink tubing loose until you ha ve finished tuning the lane.

4-24

6. Connect the cable to the check tag antenna connect or on the RF module. See

Figure 4-14 for the location of the RF module connectors.

Tuning the Lane

This chapter provides instructions for tuning the lane for optimum performance and for verif y ing t ha t t he insta lle d IT2200 Reader System is functioning correctly.

Why You Need to Tune a Lane

You tune a lane to:

• Test the installed reader system

• Adjust the read/write zone footprint to guarantee reliable tag performance and

proper transaction framing

• Minimize the RF power output to decrease interference with adjacent lanes

Chapter 5

Tuning the Lane

The read/write zone is adjusted by changing the antenna position, antenn a mounting angle, and uplink and downlink RF power. The nominal antenna angle is 15° up from horizontal in a dedicated lane and 10° up in a mixed-use lane.

Note: TransC ore r ecommends that two people accomplish this procedur e .

Warning

Switch off RF power before working on antennas .

The following procedure as sumes tha t the equipment to be tested and commissioned has been properly installed and that host computer power is available.

This lane tuning procedur e tests the following equipment:

• IT2611 RF Module

• AA3152 or AA3153 antennas

• IT2502 Check Tag Antenna

• IT2020 Reader Logic Card

• Reader-t o-RF module tag data/control cable (data cable)

• RF module power supply

• RF module power supply cable

5-3

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Required Equipment

You need the following equipment to complete the tuning procedure:

• One IT2221 and one IT2235 tag to use as baseline tags for testing all lanes

• One ATA-type tag to use as a baseline tag for te sting multimode lanes

Note: The ATA-type tag is required only if you are tuning a multimode lane.

• Plastic or wood stick. (A plastic kitchen spatula works well.)

• Rubber bands or hook-and-loo p fastener to mount tag to stick

• Tape measure and masking tape

• T est computer (PC or lunch box type ) with version 1. 03 of the IT2200 e ngineer ing

host software (P/N 11254-00) and an available ISA slot for installing a reader logic card

• Diskette with custom autonomous mode (CAM) files

• Data cable to use as an extension cable to the installe d data cable. Use a 2m (6-ft)

DB-25, fully wired, plug and socket e nd cable

• One pair of walkie talkie radio s, pr efe rably UHF band

• Multimeter, Fluke 87 or equivalent

• Vehicle. Use a car or truck for interior tags or a truck for exterior tags

• Commerci al gr ad e heat gun

• Protective electrostatic device bag

Optional Equipment

Trans Core manufactures diagnostic tools that you can use to check the reader system functions.

• Breakout Box for the IT2020 Reader Logic Card. The breakout box is used to

access IT2020-series Reader Logic Card internal signals for analysis, and uses light-emitting diodes (LEDs) to display various software signals. In addition, the breakout box can set the RF signal modulat ion high.

5-4

• External Modulation Box for the IT2611 RF Module. The mod box is used to con-

trol radio f requency ( RF) m odulati on and m easure maxim um downli nk power and depth of modulation using diagnostic equipment.

• Beeper Box for the IT2200 Reader System. The beeper box is used to verify tag

reads when diagnosing a reader system. The beeper box has internal audio/visua l indicators an d can also power remote light or audible buzzer for la ne-side tag testing.

Tuning the Lane

If you have installed multimode lanes (those using IT2200-series and ATA-type tags), then y ou must follow all of the directions out line d in t his lane tuning section. If you have installed single-mode lanes (IT2200series tags only), you can ignore the ATA tag testing instructions.

This section provides instructions for installing and starting the IT2200 engineering host software diagnostic tool to check the reader system status.

Starting the Engineering Host

To run the engineering host

1. Disconnect the data cable from the reader logic card in the host computer.

2. Remove the reader logic card from the host computer and insta ll it in the test

Tuning the Lane

computer.

3. Connect the data cable to the extension data cable, then connect the extension

data cable to the reader logic card in the test computer.

4. Start the test computer, then double-click the Host icon to start the host software.

Upon startup, the Background status information screen displays (see Figure 5-1).

5-5

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

Figure 5-1 B ackground Stat us Information S cre en

If the system is operating correctly, all Passed blocks on the diagnost ic s page are checked. Figure 5-1 shows a fail ur e of the RF Data EEP ROM, RF PLL Loc k, a nd RF Serial Link tests. Any condition that results in a Fail status must be corrected before the testing proc eeds. See Chapter Chapter 6, “Troubleshooting the Installation,” for corrective actions.

5. Click Cancel to clear the B ackground status information screen.

Lane Tag Test

This procedure determines the correct RF attenuation settings for the installed reader system.

If more than one lane is to be tuned, the other lane s should be op erating t o obtain va lid attenuation para meters. This might not be practical for the initial tuning, but final tuning must be performed with all lanes operating. For untuned lanes, set the attenuation to 9dB uplink and downlink. When these lanes are finally tuned, if their attenuation settings dif fer by more than 2dB from the selected 9dB, some repeat tuning might be necessary in other lanes.

5-6

Tuning the Lane

1. From the Reader menu, select RF Attenuation. When the RF Attenuation

Parameters screen appears, set the downlink and uplink attenuation to 0, then

click Apply.

2. From the Options menu, select Diagnostics, then Attenuation Statistics. When

the Attenuatio n Statistics Control screen appears, click Read Frame #07, All Tags, then click Run.

3. After about two minutes, a table of result s displays (see Figure 5-2 for sample

results). Sav e the table using sc reen cap ture (pre ss Al t-P rin t Scrn ), paste it into a word processing program such as Microsof t Word, and assign it a title.

An attenuation r espons e coun t of 9 or 10 is ideal. A count of 5 a t 14dB uplin k and downlink attenuation is a cceptable.

If the count at 14d B uplink a nd downl ink attenua ti on is less than 5, or if the count at 15dB uplink and downlink attenuat ion is 0, go to Chapte r Chapter 6, “Troubleshooting the Installation.”

Figure 5-2 Sample RF Attenuation Statistics for Check Tag

4. From the Reader menu, select Check Tag Control. Wh en the Check Tag

Control screen app ears, select Check Tag Disabled, then click Apply.

5-7

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

5. Mount an IT2221 or IT2235 tag on the i nside of the ve hicle’s windshield. The tag

must be at least 5 cm (2 in) from the windshield frame or rear view mirror post, and it must be below the tint line at the top of the windshield.

6. Park the vehicle with the tag exactly 3 m (10 ft) upstream of the ante nna.

7. Run the attenuation statistics program (see Step 1 of this instructions section).

Save and label the tables.

8. Compare the attenuation statistics to those shown in Figure 5-3 and Figure 5-4.

Figure 5-3 sho ws an exam p le of ac cep tab l e resu l ts. No tic e that the s cre en sho ws attenuation response counts of 9 or 10 at al most all attenuation settings. Figure 54 shows attenuation response counts that range from acceptable to marginal to unacceptable. If your results look like these, choose attenuation settings in the acceptable range.

If the r esults are un accept able, m ove th e ve hicle upst ream 15 t o 30 c m (6 to 12 in) and repeat attenuati on statistics. Then move the vehicle downstr eam of the original position 15 to 30 cm (6 to 12 in) and repeat attenuation statistics. If moving the vehicle r esults in a good r eport, the vehic le was in a small hol e or poor read area as a result of a standing wave pattern, and you can proceed with the tuning.

If you are unable to achieve good attenuation statistics by mov ing the vehicle, go to Chapter Chapter 6, “Troubleshooting the Installation.”

5-8

Figure 5-3 Acceptable RF Attenuation Statistics

Tuning the Lane

Acceptable RF Attenuation Settings

Figure 5-4 Ranges of RF Attenuation Statistics

Marginal RF Attenuation Settings

Unacceptable RF Attenuation Settings

9. Select a pair of attenuation settings that give acceptable attenuation response

counts. (Do not use 15dB attenuation.) Attenuation settings cl ose to 8dB downlink and 12dB uplink are typical in many insta llations. In Figure 5-3, settings of 13dB dow nl i nk and 7dB upl ink are an acce p tab le choice.

Check Tag Test

The check tag works be st if the ch eck ta g ant enn a wh ip is p laced d irect ly in front of the active elements of the transmit antenna. If a UT A or beacon antenna is used for the transmit antenna, the patches on the antenna lie directly down the center of the radome, equidistant from the long edges. If the check tag antenna is mounted on the same rail as t he trans mit an tenna, the c heck tag ante nna shoul d be ro tated down so tha t the whip is directly in front of the cente r of the transmit antenna radome. This is a good approximation for the chec k tag antenna placement. Ensure that the uplink and downlink RF power levels are set at the lane tuning levels previously set in the Lane Tag Test.

IT2000 Check Tag Test

This test verifies tha t the IT2000 check tag and check tag antenna are working correctly.

5-9

IT2200 Reader System with Multimode Capability Installation & Maintenance/Servic e Guide

1. Remove any tag from the read/write zone.

2. From the Reader menu, select Check Tag Control. Wh en the Check T ag

Control screen app ears, select IT-2000 Check Tag Enabled, then click Apply.

3. From the Reader menu, select RF Attenuation. When the RF Attenuation

Parameters screen appears, set the downlink and uplink attenuation to 6, then click Apply.

4. From the Tag Requests menu, select Read. When the Read Request scree n

appears, set Execution Mode to Continuous.

5. Click Run. Click the Raw Responses tab, if necessary. The tag read counter

should increment fast and steady, and the tag serial number should be 0xFFFFFFFE, the check tag signature as shown in Figure 5-5.

Check Tag

Signature

5-10

Figure 5-5 Sample Continuous Check Tag Read Request Display

6. In Executi o n Mo de, select Continuous.

7. Rotate the check tag antenna to find the high-angle and low-angle points where

the check tag begins to get continuous reads. Note the high- and low-angle positions of the check tag antenna.

If the check tag test fails, check that the check tag antenna is correctly positioned and connected. If it is, repla ce the check tag antenna. See "Check Tag Antenna" on page 6-19.

TransCore 2611SS Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

List of Figures

List of Tab les

Purpose

Intended Audience

Before You Begin

Guide Topics

Related Documents

Typographical Conventions

Licensing Requirements

U.S. Licensing

Health Limits

Overview of RFID Theory

Theory of Operation

Components

Reader

RF Module

Antennas

Tags

Read-Only and Read/Write Tags

Beam-Powered and Battery-Powered Tags

Host Computer

Operational Characteristics

Reading Range

Reading Speed

Number of Characters Stored in Tag

Number of Characters Written to an IT2200-Series Tag

Coding Format of the Tag Data

Tag Orientation and Placement

Noise and Interference Immunity

Electrical Noise and Interference

Physical Obstructions

Multipath and Signal Diffraction

Frequency and Power

Tag Lifetime

Tag Read/Write Accuracy Rate

Amtech® RF Technology

Signal Transm ission and Acquisition

Automatic Vehicle Identification Transaction Process

Types of RFID Transactions

Overview

System Components

IT2020 Reader Logic Card

Functions

Features

IT2611 RF Module (Bistatic and Monostatic)

RF Module Connections

Transmit Connector (Bistatic RF Module)

Receive Connector (Bistatic RF Module)

Transmit/Receive Connector (Monostatic RF Module)

Check Tag Connector

Data Connector

Power Supply Connector

Functions

Features

Type Testing

RF Emissions

Antennas

AA3152 Universal Toll Antenna

Functions

Features

AA3153 Beacon Antenna

Functions

Check Tag

Features

IT2502 Check Tag Antenna

Tags

IT2221 Tag

Functions

Features

IT2211 Exterior Tag

IT2235 Tag

Functions

Features

ATA Tag

Tag Programmer