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-5
CreataLink2 XT Hardware Integrator’s Guide Appendix B
Desense Measurement Techniques
Even if a narrowband noise source is separated in frequency from a receive channel,
it might move around due to temperature, load conditions, power supply variations,
and other factors. The indirect method is not an effective way to determine
desensitization at IF frequencies or from mixed product sources.
The measurement equipment should measure signals as low as –120 dBm. Use a
preamplifier to enable the spectrum analyzer to achieve these levels. Use the
smallest resolution bandwidth that the analyzer supports, typically 1 kHz, to
improve the dynamic range of the measurement.