HUAWEI EM820W HSPA+ PC Embedded Module

 

Hardware Guide

Electrical and Reliability Features

5.5 Power Supply Features

5.5.1 Power Supply

The EM820W receives its power supply from a 3.3 V power source, which must satisfy all requirements of PCI Express Mini CEM specifications, such as voltage tolerance and peak and normal current. The detailed requirements are listed in Table 5-3.

Table 5-3Power requirements

Power

Voltage Tolerance

Peak (Maximum)

Normal (Maximum)

 

 

 

 

3.3 V

±9%

2750 mA

1100 mA

 

 

 

 

In burst transmit mode of GSM/GPRS/EDGE, the instantaneous current of the module will exceed 2.75 A, which will pull down the power voltage transitorily and perhaps result in the reset of the module or host. In order to prevent this situation, you can add a large bulk capacitor beside the module on the host side (at least two 330uF capacitors).

5.5.2 Power Consumption

The power consumptions of the EM820W in different scenarios are listed in Table 5-4, Table 5-5 and Table 5-6 respectively.

Table 5-4DC power consumption (HSPA/WCDMA)

Description

Band

Test Value

Units

Power (dBm)

 

 

 

 

 

WCDMA

Band I

284

mA

1 dBm Tx Power

 

 

 

 

 

 

 

336

 

10 dBm Tx Power

 

 

 

 

 

 

 

544

 

24 dBm Tx Power

 

 

 

 

 

 

Band II

289

mA

1 dBm Tx Power

 

 

 

 

 

 

 

340

 

10 dBm Tx Power

 

 

 

 

 

 

 

606

 

24 dBm Tx Power

 

 

 

 

 

 

Band V

293

mA

1 dBm Tx Power

 

 

 

 

 

 

 

317

 

10 dBm Tx Power

 

 

 

 

 

 

 

501

 

24 dBm Tx Power

 

 

 

 

 

 

Band VIII

291

mA

1 dBm Tx Power

 

 

 

 

 

 

 

310

 

10 dBm Tx Power

 

 

 

 

 

 

 

517

 

24 dBm Tx Power

 

 

 

 

 

Issue 01 (2010-12-31)

Huawei Proprietary and Confidential

30

Copyright © Huawei Technologies Co., Ltd.

 

 

Page 37
Image 37
Huawei EM820W manual Power Supply Features, Power Consumption, Power Voltage Tolerance Peak Maximum Normal Maximum

EM820W specifications

The Huawei EM820W is a cutting-edge mobile broadband device that exemplifies Huawei's commitment to innovation and excellence in the telecommunications sector. Designed for seamless connectivity, the EM820W caters primarily to users who demand high-speed data access while on the move.

One of the standout features of the Huawei EM820W is its support for high-speed 4G LTE connectivity. With download speeds that can reach up to 150 Mbps and upload speeds of up to 50 Mbps, users can enjoy smooth streaming, rapid downloads, and responsive online gaming experiences. This capability makes the device an ideal choice for both individual users and business professionals who rely on robust internet access.

The EM820W is equipped with a compact and lightweight design, making it highly portable. This device can be easily carried in a pocket or bag, allowing users to stay connected wherever they go. Its plug-and-play feature simplifies the setup process, ensuring that even those who are not tech-savvy can easily get online.

Another notable aspect of the Huawei EM820W is its compatibility with a wide range of operating systems, including Windows, macOS, and various distributions of Linux. This versatility means that users can connect the device to their preferred platforms without facing compatibility issues, enhancing the overall user experience.

The device also incorporates advanced security features to safeguard user data, including built-in encryption protocols. This is particularly important for business users who require secure connections for sensitive transactions and communications.

In addition to its connectivity capabilities, the EM820W showcases energy-efficient technologies that optimize battery performance. The device is designed to consume minimal power, allowing users to prolong usage times without frequently recharging.

The Huawei EM820W comes with a user-friendly interface, enabling users to easily manage their connections and monitor data usage. This feature is valuable for those who need to track their internet consumption to avoid exceeding data limits imposed by service providers.

With its blend of speed, portability, and user-oriented features, the Huawei EM820W stands out as a reliable solution for those seeking robust mobile broadband capabilities. Whether for personal use or professional needs, this device ensures that users remain connected in an increasingly digital world.