Huawei EM820W manual

HUAWEI EM820W HSPA+ PC Embedded Module

Hardware Guide

Issue 01

Date 2010-12-31

Contents

Main Hardware Guide Huawei Technologies Co., Ltd. Copyright Huawei Technologies Co., Ltd. 2009. All rights reserved. Trademarks and Permissions Notice NO WARRANTY About This Document History Contents Page Tables Figures 1 1.1 Overview 2 2.1 About This Chapter 2.2 Function Overview 2.3 Circuit Block Diagram 2.4 Application Block Diagram 3 3.1 About This Chapter 3.2 Mini PCI Express Interface Page Page 3.3 Power Sources and Grounds Express Mini CEM Specifications 1.2 3.4 Power Supply Time Sequence 3.5 USB Signals 3.6 USIM Signals 3.6.1 USIM Interface Schematic Reference 3.6.2 Design Guide Page 3.6.3 Certification Test 3.7 W_DISABLE# Signal 3.8 LED_WWAN# Signal Page 3.9 WAKE_NB_N Signal OC gate, so it should be pulled up by the host and its active-low. 3.10 NC Pins 4 4.1 Operating Frequencies 4.2 Conducted RF Measurement 4.2.1 Test Environment L08-C014-350 of DRAKA COMTEQ or Rosenberger 4.2.2 Test Standards 4.3 Conducted Rx Sensitivity and Tx Power 4.3.1 Conducted Receive Sensitivity 4.3.2 Conducted Transmit Power 4.4 Antenna Design Requirements 4.4.1 Antenna Design Indicators Antenna Efficiency Isolation S11 or VSWR Polarization Envelope Correlation Coefficient Radiation Pattern Gain and Directivity 4.4.2 Interference 4.4.3 GSM/WCDMA Antenna Requirements 4.4.4 Radio Test Environment Passive Tests Active Tests 4.5 Design Recommendations 4.5.1 Recommendations for Designing the Module Antennas the slave antenna antenna away from the master antenna as far as possible. Install the slave 4.6 ESD Protection for the Antenna Interface Page 5 5.1 About This Chapter 5.2 Extreme Working Conditions 5.3 Working and Storage Temperatures and Humidity 5.4 Electrical Criteria of Application Interfaces 5.5 Power Supply Features 5.5.1 Power Supply 5.5.2 Power Consumption Page Page 5.6 Reliability Features Page 5.7 EMC and ESD Features analog/digital/RF grounds. except for areas around the antenna. 6 6.1 Dimensions and Interfaces 6.1.1 Dimensions and Interfaces of EM820W 6.2 Dimensions of the Mini PCI Express Connector 6.3 Specification Selection for Fasteners 6.3.1 Installing the EM820W on the Main Board of PC Page 6.3.2 Romoving the EM820W from the Main Board of PC 7 8