User's Manual
Table Of Contents
- Foreword
- Important Safety Information
- Contents
- About this Document
- Related Publications
- Product Description
- Features
- Specifications
- Air Interface
- Product Functionality
- Contents
- Integration Goal and Objectives
- Customer Problem Isolation
- Wireline and Wireless Communications
- Design Tips for Serviceability
- Environmental Issues
- Regulatory Requirements
- Contents
- Power Supply
- Host Interface
- Power Management
- Antenna Systems
- Hardware Recommendations
- Battery Selection Criteria
- Contents
- Hardware Integration
- Application Software
- Final Assembly
- Installation
- Troubleshooting
- End User Problem Resolution
- Service Depot Repair
- Contents
- Accessories and Options
- Abbreviations and Acronyms
- Desense Overview
- Desense Measurement Techniques
- Preparing the Device Under Test
- Performance Goals
- Methods of Controlling Emissions
- Antenna
- Summary
- FLEX Application Protocol Licensing
- Licensing
B-10 July 23, 2002
Appendix B CreataLink2 XT Hardware Integrator’s Guide
Antenna
Antenna
The CreataLink2 XT transceiver is configured for use with an external antenna kit.
You can purchase the antenna from SmartSynch, Inc., or it can be supplied by the
customer.
Field Strengths from the Antenna
Field strengths from the wireless data transceiver transmitter can reach as high
as 100 V/m 2 in. away. Field strength levels vary as a function of 1/R
2
; doubling the
distance, R, decreases the strength level by a factor of 4. The host device must be
capable of withstanding these levels. LCD displays and switching power supplies
are susceptible to RF. Reference voltage points on power supplies, reset lines on
processors, and keyboard scanning circuitry require decoupling.
Antenna Interactions
The following two interactions affect antenna performance:
• Placing a hand near the antenna can detune the antenna and absorb energy.
Position the antenna so as to minimize interaction.
• The host device can interact with the antenna, especially WAN data
transceivers that have high output power. Cabling for other peripherals must
not interfere with this region. Provide a clear space around the antenna of 12
to 18 inches. This clear space should be free of cabling and metallic objects
other than a ground plane. For fixed units, consider the antenna mounting
location when you determine antenna position.