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HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide Contents
Issue 01 (2010-12-31)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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4.4.1 Antenna Design Indicators ............................................................................................... 20
4.4.2 Interference......................................................................................................................... 23
4.4.3 GSM/WCDMA Antenna Requirements........................................................................... 23
4.4.4 Radio Test Environment.................................................................................................... 24
4.5 Design Recommendations ........................................................................................................ 25
4.5.1 Recommendations for Designing the Module Antennas ............................................. 25
4.6 ESD Protection for the Antenna Interface............................................................................... 26
5 Electrical and Reliability Features ................................................................................................28
5.1 About This Chapter..................................................................................................................... 28
5.2 Extreme Working Conditions .................................................................................................... 28
5.3 Working and Storage Temperatures and Humidity................................................................ 28
5.4 Electrical Criteria of Application Interfaces ............................................................................. 29
5.5 Power Supply Features ............................................................................................................. 30
5.5.1 Power Supply ..................................................................................................................... 30
5.5.2 Power Consumption.......................................................................................................... 30
5.6 Reliability Features..................................................................................................................... 33
5.7 EMC and ESD Features ............................................................................................................ 35
6 Mechanical Specifications.............................................................................................................36
6.1 Dimensions and Interfaces........................................................................................................ 36
6.1.1 Dimensions and Interfaces of EM820W......................................................................... 36
6.2 Dimensions of the Mini PCI Express Connector.................................................................... 36
6.3 Specification Selection for Fasteners ...................................................................................... 37
6.3.1 Installing the EM820W on the Main Board of PC ......................................................... 37
6.3.2 Romoving the EM820W from the Main Board of PC.................................................... 39
7 Appendix A Circuits of Typical Interfaces...................................................................................40
8 Appendix B Acronyms and Abbreviations...................................................................................41