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HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide Figures
Issue 01 (2010-12-31)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
iv
Figures
Figure 2-1 Circuit block diagram of the EM820W module ........................................................... 4
Figure 2-2 Application block diagram of the EM820W module ................................................... 4
Figure 3-1 HUAWEI EM820W power supply time sequence. ..................................................... 9
Figure 3-2 USIM interface schematic on PC.................................................................................11
Figure 3-3 Pin definition of the SIM card Socket ..........................................................................11
Figure 3-4 LED_WWAN# signal reference circuit diagram........................................................ 15
Figure 3-5 LED typical electro-optical characteristics curves.................................................... 16
Figure 4-1 SATIMO microwave testing chamber......................................................................... 25
Figure 4-2 Recommended antenna positions.............................................................................. 26
Figure 4-3 ESD protection circuit recommended for the antenna interface ............................ 27
Figure 6-1 Dimensions of the EM820W........................................................................................ 36
Figure 6-2 Dimensions of the Mini PCI Express connector ....................................................... 37
Figure 7-1 Circuits of typical interfaces in the EM820W module .............................................. 40