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Huawei EM820W, Hardware Manual

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HUAWEI EM820W HSPA+ PC Embedded Module 
Hardware Guide   

RF Specifications

 

Issue 01 (2010-12-09) 

Huawei Proprietary and Confidential 

Copyright © Huawei Technologies Co., Ltd. 

24

 

This device is to be used only for mobile and fixed application. The antenna(s) used 
for this transmitter must be installed to provide a separation distance of at least 20 
cm from all persons and must not be co-located or operating in conjunction with any 
other antenna or transmitter. End-Users must be provided with transmitter operation 
conditions for satisfying RF exposure compliance. OEM integrators must ensure that 
the end user has no manual

 

instructions to remove or install the UC864-E/G/WD 

/WDU module. Antennas used for this OEM module must not exceed 3dBi gain for 
mobile and fixed operating configurations. 

4.4.4 Radio Test Environment 

The antenna efficiency, antenna gain, radiation pattern, total radiated power (TRP), 
and TIS can be tested in a microwave testing chamber. 

Huawei has a complete set of OTA test environment (SATIMO microwave testing 
chambers and ETS microwave testing chambers). The testing chambers are certified 
by professional organizations and are applicable to testing at frequencies ranging 
from 380 MHz to 6 GHz. The test items are described as follows: 

Passive Tests 

z

 

Antenna efficiency 

z

 

Gain 

z

 

Pattern shape 

z

 

Envelope correlation coefficient 

Active Tests 

z

 

TRP:

 GSM, WCDMA, CDMA, TD-SCDMA, and LTE systems 

z

 

TIS:

 GSM, WCDMA, CDMA, TD-SCDMA, and LTE systems 

Figure 4-1 shows the SATIMO microwave testing chamber. 

Summary of Contents for EM820W

Page 1: ...HUAWEI EM820W HSPA PC Embedded Module Hardware Guide Issue 01 Date 2010 12 09 ...

Page 2: ...emarks product service and company names mentioned are the property of their respective owners Notice Some features of the product and its accessories described herein rely on the software installed capacities and settings of local network and may not be activated or may be limited by local network operators or network service providers thus the descriptions herein may not exactly match the produc...

Page 3: ...bedded Module Hardware Guide About This Document Issue 01 2010 12 09 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd About This Document History Version Date Chapter Descriptions 01 2010 12 09 Creation ...

Page 4: ...3 2 Mini PCI Express Interface 5 3 3 Power Sources and Grounds 8 3 4 Power Supply Time Sequence 8 3 5 USB Signals 9 3 6 USIM Signals 10 3 6 1 USIM Interface Schematic Reference 10 3 6 2 Design Guide 11 3 6 3 Certification Test 13 3 7 W_DISABLE Signal 14 3 8 LED_WWAN Signal 14 3 9 WAKE_NB_N Signal 16 3 10 NC Pins 16 4 RF Specifications 17 4 1 Operating Frequencies 17 4 2 Conducted RF Measurement 17...

Page 5: ...ditions 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 C...

Page 6: ...3 10 Radio operational states 14 Table 3 11 LED_WWAN signal 15 Table 4 1 RF bands 17 Table 4 2 EM820W conducted Rx sensitivity unit dBm 18 Table 4 3 EM820W conducted Tx power unit dBm 19 Table 4 4 Isolation between the master antenna and the Wi Fi antenna 20 Table 4 5 GSM WCDMA antenna requirements 23 Table 5 1 Working and storage temperatures and humidity for the EM820W module 29 Table 5 2 Electr...

Page 7: ...e 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...

Page 8: ...erfaces and air interfaces that are provided when the Huawei EM820W HSPA PC Embedded module hereinafter referred to as the EM820W module is used This document helps you to understand the interface specifications electrical features and related product information of the EM820W module To facilitate its use in different fields relevant development guides document are also provided with the module wh...

Page 9: ...able 2 1 Feature Feature Description Working bands GSM GPRS EDGE 850 900 1800 1900 MHz HSPA HSUPA HSDPA WCDMA 2100 1900 900 850 MHz Normal working temperature 10 C to 55 C Working temperature Extreme working temperatures 20 C to 10 C and 55 C to 70 C Ambient temperature for storage 40 C to 85 C Power voltage 3 3 V 9 3 3 V is recommended AT commands See the HUAWEI EM820W HSPA PC Embedded Module Sof...

Page 10: ...4 kbps GPRS EDGE Multi slot Class 12 Class B WCDMA CS UL 64kbps DL 64kbps WCDMA HSDPA PS UL384kbps DL3 6Mbps HSDPA Category 6 8 9 10 12 14 Data services HSPA Rel7 Physical features Dimensions L W H 50 95 mm 30 mm 4 5 mm Weight 15 g Certification information Restriction of the use of certain Hazardous Substances RoHS European Conformity CE Federal Communications Commission FCC 2 3 Circuit Block Dia...

Page 11: ...verall Description Issue 01 2010 12 09 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 4 Figure 2 1 Circuit block diagram of the EM820W module 2 4 Application Block Diagram Figure 2 2 Application block diagram of the EM820W module ...

Page 12: ...and Grounds z Power Supply Time Sequence z USB Signals z USIM Signals z W_DISABLE Signal z LED_WWAN Signal z WAKE_NB_N Signal z NC Pins 3 2 Mini PCI Express Interface The EM820W has a standard Mini PCI Express interface which consists of several major signals as shown in the following table Table 3 1 Pin definitions of the Mini PCI E Interface Definition of the EM820W Mini PCI Express pins Pin No ...

Page 13: ...ted 7 CLKREQ NC Not connected 8 UIM_PWR UIM_PWR Power source for the external UIM SIM card Output 9 GND GND Mini Card ground 10 UIM_DATA UIM_DATA External UIM SIM data signal Input output 11 REFCLK NC Not connected 12 UIM_CLK UIM_CLK External UIM SIM clock signal Output 13 REFCLK NC Not connected 14 UIM_RESET UIM_RESET External UIM SIM reset signal Output 15 GND GND Mini Card ground 16 UIM_Vpp NC ...

Page 14: ...NC Not connected 31 PETn0 NC Not connected 32 SMB_DATA NC Not connected 33 PETp0 NC Not connected 34 GND GND Mini Card ground 35 GND GND Mini Card ground 36 USB_D USB_D USB signal D Input output 37 GND GND Mini Card ground 38 USB_D USB_D USB signal D Input output 39 3 3Vaux VCC_3V3 3 3V DC supply rail from the PC side Input 40 GND GND Mini Card ground 41 3 3Vaux VCC_3V3 3 3V DC supply rail from th...

Page 15: ... Mini Card provides two power sources one is 3 3 Vaux 3 3 Vaux and the other is 1 5 V 1 5 V For the EM820W however 3 3 Vaux is the only voltage supply that is available The input voltage is 3 3 V 9 as specified by PCI Express Mini CEM Specifications 1 2 Table 3 2 Power and ground specifications Name Pins Minimum Type Maximum VCC 2 24 39 41 and 52 3 0 V 3 3 V 3 6 V GND 4 9 15 18 21 26 27 29 34 35 3...

Page 16: ...t The USB 2 0 specifications allow peripherals to support any one or more of these speeds To ensure best performance the PC USB host controller should support high speed mode when using the EM820W USB high speed mode Table 3 3 USB pins Name Pin Description Direction to Module USB D 36 USB data signal D Input output USB D 38 USB data signal D Input output To minimize the RF radiation through the PC...

Page 17: ...res as well as authentication methods for network authentication during the process of attaching to a network Table 3 5 USIM pins Pin Name Description Direction to Module 8 UIM_PWR Power source for the external UIM SIM Output 10 UIM_DATA External UIM SIM data signal Input output 12 UIM_CLK External UIM SIM clock signal Output 14 UIM_RESET External UIM SIM reset signal Output It is recommended that...

Page 18: ... Technologies Co Ltd 11 Figure 3 2 USIM interface schematic on PC Figure 3 3 Pin definition of the SIM card Socket pin1 SIM_VCC pin4 GND pin2 SIM_RESET pin5 NULL pin3 SIM_CLK pin6 SIM_DATA 3 6 2 Design Guide The USIM signals are connected to the Mini PCI Express card connector the card edge connector and pass through an EMI filtering and ESD protection circuit on the ...

Page 19: ...e is always on However the clock signal is only activated when data is actually being transmitted The USIM signals from the module are connected to the level translators and then to the Mini Card host connector The UIM_DETECT pin is optional depending on whether this function is required For UIM_DATA it does not need to add a pull up resistor because it has been pulled up to UIM_PWR with a 15 kΩ r...

Page 20: ...an be programmed to generate a clock of 1 625 MHz 2 6 MHz or 3 25 MHz z Routing recommendations The SIM interface signals consist of four signals that are UIM_PWR UIM_RST UIM_CLK and UIM_DATA UIM_Vpp is neither connected nor used in many applications Due to the relatively low clock frequencies involved the concern is not the degradation of the SIM signals but that of routing of the SIM interface s...

Page 21: ...emains disabled unless both the hardware and software are set to enable the RF features of the card Table 3 9 W_DISABLE_N signal Pins Name Description Direction to Module 20 W_DISABLE_N Close wireless communications Input Table 3 10 Radio operational states W_DISABLE SW Control Setting Radio Operation High Enabled Enabled High Disabled Low Enabled Low Disabled Disabled This control setting is impl...

Page 22: ...he LED is on and when disabled the LED is off The wink mode of the LED can be customized according to the requirement of the client For resistance of R placed on PC choose the value that satisfies the following equation IF R VF IF 100 VCC VF Forward Voltage IF Forward current Take the LED 19 213 GVC AMNB 3T as an example its manufacturer is Everlight Electronics Ltd and the website is http www eve...

Page 23: ...al electro optical characteristics curves 3 9 WAKE_NB_N Signal WAKE_NB_N signal that the module uses to activate the PC Support software controls the signal WAKE_NB_N that the module uses to activate the PC This signal is used for 3G module to wake up the host It s designed as a OC gate so it should be pulled up by the host and it s active low 3 10 NC Pins The NC pins are not internally connected ...

Page 24: ...UMTS 2100 BandⅠ 1920 1980 MHz 2110 2170 MHz UMTS 1900 Band Ⅱ 1850 1910 MHz 1930 1990 MHz UMTS 900 Band Ⅷ 880 915 MHz 925 960 MHz UMTS 850 Band Ⅴ 824 849MHz 869 894 MHz GSM 850 824 849 MHz 869 894 MHz GSM 900 880 915 MHz 925 960 MHz GSM 1800 DCS 1710 1785 MHz 1805 1880 MHz GSM 1900 PCS 1850 1910 MHz 1930 1990 MHz 4 2 Conducted RF Measurement 4 2 1 Test Environment Test instrument R S CMU200 Power s...

Page 25: ...cted Rx Sensitivity and Tx Power 4 3 1 Conducted Receive Sensitivity The conducted receive sensitivity is a key parameter that indicates the receiver performance of EM820W The conducted receive sensitivity means the weakest signal that the module at the antenna port can receive The BER must meet the 3GPP protocol requirements in the case of the minimum signal The 3GPP Protocol Claim column in Tabl...

Page 26: ...31 35 32 GSM900 31 35 32 GSM1800 28 32 29 5 GSM1900 28 32 29 5 W2100 21 25 23 W1900 21 25 23 900 21 25 23 W850 21 25 23 4 4 Antenna Design Requirements 4 4 1 Antenna Design Indicators Antenna Efficiency Antenna efficiency is the ratio of the input power to the radiated or received power of an antenna The radiated power of an antenna is always lower than the input power due to the following losses ...

Page 27: ...ced farther away from the EM820W Antenna isolation can be measured with a two port vector network analyzer The following antenna isolation is recommended for the antennas on laptops z Isolation between master and slave antennas 12 dB z Isolation between the master antenna and the GPS antenna 15 dB z Isolation between the slave antenna and the Wi Fi antenna 15 dB If a Wi Fi module is installed on t...

Page 28: ...na 10 dB Polarization The polarization of an antenna is the orientation of the electric field vector that rotates with time in the direction of maximum radiation The linear polarization is recommended for the antennas on laptops Envelope Correlation Coefficient The envelope correlation coefficient indicates the correlation between different antennas in a multi antenna system master antenna diversi...

Page 29: ...ary with that of the master antenna The following radiation patterns are recommended for the antennas on laptops z Master antenna omnidirectional z Slave antenna complementary with the radiation pattern of the master slave z GPS antenna omnidirectional z Wi Fi antenna omnidirectional Gain and Directivity The radiation pattern of an antenna represents the field strength of the radiated electromagne...

Page 30: ...sen the effects of interference sources on the module you can use an LCD with optimized performance shield the LCD interference signals shield the signal cable of the board or design filter circuits Huawei is capable of making technical suggestions on radio performance improvement of the module 4 4 3 GSM WCDMA Antenna Requirements The antenna for EM820W must fulfill the following requirements Tabl...

Page 31: ...l the UC864 E G WD WDU module Antennas used for this OEM module must not exceed 3dBi gain for mobile and fixed operating configurations 4 4 4 Radio Test Environment The antenna efficiency antenna gain radiation pattern total radiated power TRP and TIS can be tested in a microwave testing chamber Huawei has a complete set of OTA test environment SATIMO microwave testing chambers and ETS microwave t...

Page 32: ...ded that the module antennas are designed at the upper edge left edge or right edge of the laptop screen Designing the antenna at the upper edge is better z Take the isolation and envelope correlation between the master antenna and the slave antenna into account when designing the antennas Keep the slave antenna away from the master antenna as far as possible Install the slave antenna perpendicula...

Page 33: ...er laptop antennas should be considered Ensure that proper distance is maintained between antennas if possible To reduce the interference between antennas it is recommended that an antenna is not designed close to another one z Carefully design the metallic components such as the external frame of the metallic shell in and near the antenna area by considering the effects on the antenna performance...

Page 34: ...dential Copyright Huawei Technologies Co Ltd 27 Figure 4 3 ESD protection circuit recommended for the antenna interface It is recommended that you pay attention to the junction capacitance of the TVS diode when you choose the model of the TVS diode Ensure that the junction capacitance of the TVS diode is lower than 1 pF ...

Page 35: ...module including z Extreme Working Conditions z Working and Storage Temperatures and Humidity z Electrical Criteria of Application Interfaces z Power Supply Features z Reliability Features z EMC and ESD Features 5 2 Extreme Working Conditions Table 5 1 lists the extreme working conditions for the EM820W module Using the EM820W module beyond these conditions may result in permanent damage to the mo...

Page 36: ...re all its RF indexes comply with the 3GPP TS 45 005 specifications 2 When the EM820W module works at this temperature certain RF indexes do not comply with the 3GPP TS 45 005 specifications 5 4 Electrical Criteria of Application Interfaces Table 5 2 lists electrical features typical values Table 5 2 Electrical features of application interfaces Parameter Description Minimum Value Maximum Value Un...

Page 37: ...Table 5 3 Power requirements Power Voltage Tolerance Peak Maximum Normal Maximum 3 3 V 9 2750 mA1 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 o...

Page 38: ...wer Band I IMT2100 585 mA 24 dBm Tx Power 350 1 dBm Tx Power 409 10 dBm Tx Power Band II PCS 1900 646 mA 24 dBm Tx Power 361 1 dBm Tx Power 380 10 dBm Tx Power Band V 850M 552 mA 24 dBm Tx Power 343 1d Bm Tx Power 365 10 dBm Tx Power HSDPA Band Ⅷ 900M 560 mA 24 dBm Tx Power 378 1 dBm Tx Power 424 10 dBm Tx Power Band I IMT2100 610 mA 24 dBm Tx Power 357 1 dBm Tx Power 407 10 dBm Tx Power Band II P...

Page 39: ...mA 15 2 Up 1 Down 345 1 Up 1 Down 514 mA 5 2 Up 1 Down 143 1 Up 1 Down GPRS900 195 mA 15 2 Up 1 Down 236 1 Up 1 Down 355 mA 0 2 Up 1 Down 128 1 Up 1 Down GPRS1800 166 mA 10 2 Up 1 Down 217 1 Up 1 Down 318 mA 0 2 Up 1 Down 131 1 Up 1 Down GPRS1900 167 mA 10 2 Up 1 Down 250 1 Up 1 Down 351 2 Up 1 Down 488 mA 8 4 Up 1 Down 165 1 Up 1 Down 217 2 Up 1 Down EDGE850 293 mA 15 4 Up 1 Down 229 1 Up 1 Down ...

Page 40: ... Up 1 Down EDGE1900 218 mA 10 4 Up 1 Down Table 5 6 DC power consumption Idle and Suspend Idle Suspend Scenario Offline Enabled Offline Disabled Offline Enabled Offline Disabled Unit WCDMA 2100MHz DRX 8 2 56 s 66 3 72 7 4 1 5 8 mA GSM 900MHz MFRM 5 1 18 s 70 6 73 1 4 1 7 8 mA z In idle mode the module is registered to the network USB bus is active and no voice or data call connection is ongoing z ...

Page 41: ... h IEC60068 Damp heat cycling High temperature 55 2ºC Low temperature 25 2ºC Humidity 95 Repetition times 4 Test duration 12 h 12 h IEC60068 Temperature shock Low temperature 40 2ºC High temperature 85 2ºC Temperature change interval 30s Test duration 15 min Repetition times 100 IEC60068 Salty fog test Temperature 35 C Density of the NaCl solution 5 1 Spraying interval 8 h Duration of exposing the...

Page 42: ...atures EMC tests have to be performed on the application as soon as possible to detect any potential problems When designing special attention should be paid to z Possible spurious emissions radiated by the application to the RF receiver in the receiver band z ESD protection that is mandatory on all signals which are externally accessible Typically ESD protection is mandatory for the SIM if access...

Page 43: ... Interfaces of EM820W The dimensions of EM820W are 50 95 mm length 30 mm width 4 5 mm height Figure 6 1 shows the dimensions of EM820W in detail Figure 6 1 shows the appearance of the interfaces on the EM820W Figure 6 1 Dimensions of the EM820W 6 2 Dimensions of the Mini PCI Express Connector The EM820W adopts a standard Mini PCI Express connector that has 52 pins and complies with the PCI Express...

Page 44: ...ini PCI Express connector take the Molex 67910002 as an example Figure 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 To install the EM820W on the main board of the PC do the following Step 1 Insert the Mini PCI Express connector of the EM820W into the WWAN Mini PCI Express interface on the main board o...

Page 45: ...abel of the EM820W Insert the connector of the auxiliary antenna into the AUX antenna interface A of the c EM820W in the same way z Insert the antenna connectors vertically into the antenna interfaces of the EM820W z Do not press or squeeze the antenna cable or damage the connectors Otherwise the wireless performance of the EM820W may be reduced or the EM820W cannot work normally z Ensure that the...

Page 46: ...cal Specifications Issue 01 2010 12 09 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 39 Step 2 Remove the two screws with the screwdriver Step 3 Slide backwards the two clips to release the EM820W from the slot Then lift up the EM820W ...

Page 47: ...uide Appendix A Circuits of Typical Interfaces Issue 01 2010 12 09 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 40 7 Appendix A Circuits of Typical Interfaces Figure 7 1 Circuits of typical interfaces in the EM820W module ...

Page 48: ...DC direct current DCE data circuit terminating equipment DMA direct memory access DTE data terminal equipment EIA Electronic Industries Association EMC electromagnetic compatibility ESD electrostatic discharge EU European Conformity FCC Federal Commnications Commission FDD TDMA frequency division duplexing time division multiple access GMSK Gaussian minimum shift keying GPRS general packet radio s...

Page 49: ...NTC negative temperature coefficient PBCCH Packet Broadcast Control Channel PCB printed circuit board PDU protocol data unit PMU Power manage Unit RF radio frequency RoHS Restriction of the use of certain Hazardous Substances RTC real time clock SIM Subscriber Identity Module TTL transistor transistor logic TVS transient voltage suppressor UART universal asynchronous receiver transmitter VSWR volt...

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