Huawei ME909 Series - Page 60

HUAWEI ME909 Series LTE LGA Module
Hardware Guide
Electrical and Reliability Features
Issue V0.3 (2013-05-21)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
60
− USIM
− UART
− USB

Length of the USIM interface lines (preferably <10 cm).

EMC protection on audio input/output (filters against 900MHz emissions).

Biasing of the microphone inputs.

Ground plane: HUAWEI recommends a common ground plane for
analog/digital/RF grounds.

A metallic or plastic case with conductive paint is recommended, except for the
area around the antenna.
The HUAWEI ME909 Module does not include any protection against over voltage.