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
July 23, 2002 B-1
CreataLink2 XT Hardware Integrator’s Guide Appendix B
Desense Overview
Desense Overview
The CreataLink2 XT device is a board-level product. This discussion of desense is
included to ensure that integrators are aware of its effects.
This section details the following aspects of desense:
• Desense Defined
• Noise Sources
• Receiver Susceptibilities
• Measurement Techniques
• Preparing the Device under Test
• Performance Goals
• Radio Performance Capabilities
• FCC Part 15 Level Comparison
• Determining Emission Level Goals
• Prediction of Sources
• Desense Scenarios
• Methods of Controlling Emissions
• Shielding Approach
• Alternate EMI Reduction Methods
• Antenna
• Field Strengths from the Antenna
• Antenna Interactions
• Summary
Desense Defined
Receiver desensitization occurs when an unwanted signal is present in the receiver
at a frequency that causes interference (see Figure B-1). The sources can be difficult
to locate and difficult to correct. This noise desensitizes or lowers the sensitivity
threshold of the receiver.
BAppendix B