AirPrime EM8805 Hardware Integration Guide 4112940 Rev 1 Distribution under NDA only Contents subject to change
Preface Important Notice Due to the nature of wireless communications, transmission and reception of data can never be guaranteed. Data may be delayed, corrupted (i.e., have errors) or be totally lost.
Hardware Integration Guide Patents This product may contain technology developed by or for Sierra Wireless Inc. This product includes technology licensed from QUALCOMM®. This product is manufactured or sold by Sierra Wireless Inc. or its affiliates under one or more patents licensed from InterDigital Group. Copyright ©2013 Sierra Wireless. All rights reserved. Trademarks AirCard® is a registered trademark of Sierra Wireless.
Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Required connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Power supply . . . . . . . . . . . . .
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1 1: Introduction The Sierra Wireless EM8805 Embedded Module is an M.2 wireless module that provides DC-HSPA+, HSPA+, HSDPA, HSUPA, WCDMA, GSM, GPRS, EDGE, and GNSS connectivity for notebook, ultrabook, and tablet computers over several radio frequency bands. The device also supports 2G / 3G roaming. The EM8805 is designed to be carrier-certified (AT&T), Androidcompliant, and Windows 8 Mobile Broadband Interface Model (MBIM) compliant. Accessories A hardware development kit is available for AirPrime M.
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2 2: Power Power supply The host provides power to the EM8805 through multiple power and ground pins. The host must provide safe and continuous power (via battery or a regulated power supply) at all times; the module does not have an independent power supply, or protection circuits to guard against electrical issues. For detailed pinout and voltage / current requirements of this module, see the AirPrime EM8805 Product Technical Specification & Customer Design Guidelines.
Hardware Integration Guide Disconnected 10 Normal state of module between calls or data connections • Host keeps module powered off by asserting Full_Card_Power_Off# (signal pulled low or left floating) • Module draws minimal current • Host power source is disconnected from the module and all voltages associated with the module are at 0 V.
3 3: RF Specifications The EM8805 operates on the frequency bands listed below: Table 3-1: WCDMA frequency band support1 Band Frequencies Band 1 WCDMA 2100 Tx: 1920–1980 MHz Rx: 2110–2170 MHz Band 2 WCDMA 1900 Tx: 1850–1910 MHz Rx: 1930–1990 MHz Band 5 WCDMA 850 Tx: 824–849 MHz Rx: 869–894 MHz Band 8 WCDMA 900 Tx: 880–915 MHz Rx: 925–960 MHz 1. WCDMA channel spacing is 5 MHz, but this can be adjusted to optimize performance in a particular deployment scenario.
Hardware Integration Guide (911-002-0006R), Speedtech (C87P101-00001-H), Murata (MM4829-2702RA4 (HSC)), IPEX (20449-001E (MHF4)) • Match coaxial connections between the module and the antenna to 50 . • Minimize RF cable losses to the antenna; the recommended maximum cable loss for antenna cabling is 0.5 dB. • To ensure best thermal performance, if possible use the mounting hole to attach (ground) the device to a metal chassis.
RF Specifications • Antenna cables should be routed, if possible, away from noise sources (switching power supplies, LCD assemblies, etc.). If the cables are near the noise sources, the noise may be coupled into the RF cable and into the antenna. Disabling the diversity antenna • Use the AT command !RXDEN=0 to disable receive diversity or !RXDEN=1 to enable receive diversity. Note: A diversity antenna is used to improve connection quality and reliability through redundancy.
Hardware Integration Guide Interference from other wireless devices Wireless devices operating inside the host device can cause interference that affects the module. To determine the most suitable locations for antennas on your host device, evaluate each wireless device’s radio system, considering the following: • Any harmonics, sub-harmonics, or cross-products of signals generated by wireless devices that fall in the module’s Rx range may cause spurious response, resulting in decreased Rx performance.
RF Specifications • Form shielding layers around high-speed clock traces by using multi-layer PCBs. • Route antenna cables away from noise sources. Radiated Spurious Emissions (RSE) When designing an antenna for use with AirPrime embedded modules, the host device with an AirPrime embedded module must satisfy the radiated spurious emission (RSE) test cases described in: • CE/ETSI EN 301 908 (WCDMA), test numbers 5.3.1 (‘Radiated Emissions (UE)’) • CE/ETSI EN 301 511 (GSM), test 5.2.
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4 4: Regulatory Compliance and Industry Certifications This module is designed to meet, and upon commercial release, will meet the requirements of the following regulatory bodies and regulations, where applicable: • Federal Communications Commission (FCC) of the United States • The National Communications Commission (NCC) of Taiwan, Republic of China • Radio Equipment and Telecommunications Terminal Equipment (R&TTE) Directive of the European Union Upon commercial release, the following industry cert
Hardware Integration Guide • Where explosive atmospheres may be present including refuelling points, fuel depots, and chemical plants • Near medical equipment, life support equipment, or any equipment which may be susceptible to any form of radio interference. In such areas, the EM8805 wireless module MUST BE POWERED OFF. Otherwise, the EM8805 wireless module can transmit signals that could interfere with this equipment. In an aircraft, the EM8805 wireless module MUST BE POWERED OFF.
Regulatory Compliance and Industry Certifications · The output power and antenna gain must not exceed the limits and configurations stipulated in the following table. Device EM8805 Embedded Module Technology UMTS GSM Collocated transmitters1 WLAN WiMAX BT Band Frequency (MHz) Maximum conducted power (dBm) Maximum antenna gain (dBi) 2 1850–1910 23.5 3 5 824–849 23.5 3 850 824–849 33 3 1900 1850–1910 30 3 2400–2500 29 5.0 5150–5850 29 5.0 2300–2400 29 5.
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5 5: Acronyms Table 5-1: Acronyms and definitions Acronym or term Definition 3GPP 3rd Generation Partnership Project 8PSK Octagonal Phase Shift Keying AGC Automatic Gain Control A-GPS Assisted GPS A-GNSS Assisted GNSS API Application Programming Interface BER Bit Error Rate — A measure of receive sensitivity BLER Block Error Rate bluetooth Wireless protocol for data exchange over short distances CQI Channel Quality Indication COM Communication port CS Circuit-switched CW Continuo
Hardware Integration Guide Table 5-1: Acronyms and definitions (Continued) Acronym or term 22 Definition EMC Electromagnetic Compatibility EMI Electromagnetic Interference ERP Effective Radiated Power ESD Electrostatic Discharge FCC Federal Communications Commission The U.S. federal agency that is responsible for interstate and foreign communications.
Acronyms Table 5-1: Acronyms and definitions (Continued) Acronym or term Rev 1 Jan.13 Definition IF Intermediate Frequency IMEI International Mobile Equipment Identity IMS IP Multimedia Subsystem — Architectural framework for delivering IP multimedia services. inrush current Peak current drawn when a device is connected or powered on inter-RAT Radio Access Technology IOT Interoperability Testing IS Interim Standard.
Hardware Integration Guide Table 5-1: Acronyms and definitions (Continued) Acronym or term 24 Definition PCS Personal Communication System A cellular communication infrastructure that uses the 1.9 GHz radio spectrum. PDN Packet Data Network PMI Pre-coding Matrix Index PSS Primary synchronisation signal PST Product Support Tools PTCRB PCS Type Certification Review Board QAM Quadrature Amplitude Modulation.
Acronyms Table 5-1: Acronyms and definitions (Continued) Acronym or term Rev 1 Jan.13 Definition SKU Stock Keeping Unit—identifies an inventory item: a unique code, consisting of numbers or letters and numbers, assigned to a product by a retailer for purposes of identification and inventory control. SMS Short Message Service.
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Index A G accessories, 7 acronyms and definitions, 21– 25 antenna connection considerations, 11 custom, design, 12 diversity antenna, disabling, 13 limit, matching coaxial connections, 12 location, considerations, 12 matching, considerations, 12 maximum cable loss, 12 routing, 13 approvals, regulatory and industry, 17 gain B bands supported, RF GSM, 11 WCDMA, 11 C I impedance module–antenna, 12 industry approvals, 17 interference device generated, 14 host-generated, 14 wireless devices, 14 M module p
Hardware Integration Guide RF antenna cable loss, maximum, 12 antenna connection, considerations, 11 connectors, required, 7 desense device-generated, 14 harmonic energy, filtering, 14 mitigation suggestions, 14 shielding suggestions, 14 interference other devices, 14 wireless devices, 14 RF bands supported GSM, 11 WCDMA, 11 RF specifications, 11 RSE, 15 S sensitivity radiated measurement, overview, 15 shielding module, compliance, 12 reducing RF desense, 14 SIM connector, required, 7 specifications RF, 1
