AirPrime EM7700 Hardware Integration Guide 4112206 Rev 2
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.
AirPrime EM7700 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 © 2012 Sierra Wireless. All rights reserved. Trademarks Sierra Wireless™, AirPrime™, Watcher™, and the Sierra Wireless logo are trademarks of Sierra Wireless.
Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 The Universal Development Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Required connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Power Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Overview of operation . . . . . . . . . . . . . . . . .
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1 1: Introduction Sierra Wireless’ AirPrime Intelligent Embedded Modules form the radio component for the products in which they are embedded. The AirPrime EM7700 is available for use on LTE and HSPA+ networks. Note: An understanding of network technology, and experience in integrating hardware components into electronic equipment is assumed.
AirPrime EM7700 Hardware Integration Guide Required connectors Table 1-1 describes the connectors used to integrate the EM7700 Module into your host device. Table 1-1: Required host-module connectors a Connector type Description • Mate with I-PEX MHF-A13 connectors • Two connector jacks FPC (70-pin) • Hirose Flexible Printed Circuit (FPC) connector FH29BJ-70S-0.2SHW(05) SIM • Industry-standard connector.
2 2: Power Interface Overview of operation AirPrime embedded modules are designed to use a 3.7V (nominal) power supply provided by the host. It is the host’s responsibility to provide safe and continuous power to the module at all times; the module does NOT have an independent power supply, or protection circuits to guard against electrical issues. The module’s power state is controlled by the host’s assertion/ deassertion of POWER_ON and RESET_N.
AirPrime EM7700 Hardware Integration Guide Module power states The module has five power states, as described in Table 2-1. Module is active • Module is capable of placing/receiving calls, or establishing data connections on the wireless network • Current consumption is affected by several factors, including: • • Default state.
3 3: RF Integration The AirPrime EM7700 operates on the frequency bands listed below. Table 3-1: LTE frequency band support Band Frequencies Band 4 (AWS) Tx: 1710–1755 MHz Rx: 2110–2155 MHz Band 17 Tx: 704–716 MHz Rx: 734–746 MHz Table 3-2: HSPA+ frequency band supporta 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 a.
AirPrime EM7700 Hardware Integration Guide Note: If the antenna connection is shorted or open, the modem will not sustain permanent damage. Ground connection When connecting the module to system ground: • Prevent noise leakage by establishing a very good ground connection to the module through the host connector. • Connect to system ground using the three mounting holes at the top and bottom of the module. • Minimize ground noise leakage into the RF.
RF Integration Determining the antenna’s location When deciding where to put the antennas: • Antenna location may affect RF performance. Although the module is shielded to prevent interference in most applications, the placement of the antenna is still very important—if the host device is insufficiently shielded, high levels of broadband or spurious noise can degrade the module’s performance. • Connecting cables between the module and the antenna must have 50 impedance.
AirPrime EM7700 Hardware Integration Guide In most instances, it is necessary to employ shielding on the components of the host device (such as the main processor and parallel bus) that have the highest RF emissions. • Filter out unwanted high-order harmonic energy by using discrete filtering on low frequency lines. • Form shielding layers around high-speed clock traces by using multi-layer PCBs. • Route antenna cables away from noise sources.
RF Integration • The Tx power and corresponding broadband noise of other wireless devices may overload or increase the noise floor of the module’s receiver, resulting in Rx desense. The severity of this interference depends on the closeness of the other antennas to the module’s antenna. To determine suitable locations for each wireless device’s antenna, thoroughly evaluate your host device’s design.
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A A: Regulatory Information This module is designed to and, upon commercial release, will be certified to meet carrier requirements (e.g. AT&T). Upon commercial release, the following regulatory approvals will have been attained: • FCC Upon commercial release, the following industry approvals will have been obtained: • PTCRB Additional approvals may be obtained upon customer request— contact your Sierra Wireless account representative for details.
AirPrime EM7700 Hardware Integration Guide In an aircraft, the EM7700 modem MUST BE POWERED OFF. Otherwise, the EM7700 modem can transmit signals that could interfere with various onboard systems and may be dangerous to the operation of the aircraft or disrupt the cellular network. Use of a cellular phone in an aircraft is illegal in some jurisdictions. Failure to observe this instruction may lead to suspension or denial of cellular telephone services to the offender, or legal action or both.
Device Technology Frequency (MHz) Maximum Conducted Power (dBm) Maximum Antenna Gain (dBi) EM7700 module UMTS 824–849 24 6.5 UMTS 1850–1910 24 9.0 LTE 704–716 24 6.0 LTE 1710–1755 24 6.0 WLAN 2400–2500 29 5.0 WLAN 5150–5850 29 5.0 WiMAX 2300–2400 29 5.0 WiMAX 2500–2700 29 5.0 WiMAX 3300–3800 29 5.0 BT 2400–2500 15 5.0 Co-located transmittersa a. Valid co-located transmitter combinations: WLAN+BT; WiMAX+BT. WLAN+WiMAX+BT is not permitted. 4.
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B B: Acronyms and Definitions . Table B-1: Acronyms and definitions Acronym or term Definition AGC Automatic Gain Control BER Bit Error Rate - a measure of receive sensitivity BLER Block Error Rate Call Box Base Station Simulator - Agilent E8285A or 8960, Rohde & Schwarz CMU200 CDMA Code Division Multiple Access dB Decibel = 10 x log10 (P1/P2) P1 is calculated power; P2 is reference power Decibel = 20 x log10 (V1/V2) V1 is calculated voltage, V2 is reference voltage Rev 2 Apr.
AirPrime EM7700 Hardware Integration Guide Table B-1: Acronyms and definitions Acronym or term 22 Definition MC8xxx Any of the following GSM/UMTS AirPrime embedded modules: MC8700/ MC8704/MC8705/MC8790/MC8790V/MC8791V/MC8792V/MC8795V/ MC8801 MHz MegaHertz = 10E6 Hertz (Hertz = 1 cycle/second) MIO Module Input/Output MPE Maximum Permissible Exposure—the level of radiation to which a person may be exposed without hazardous effect or adverse biological changes OTA Over-The-Air or Radiated through
Index A H acronyms and definitions, 21– 22 antenna connection considerations, 11 custom, considerations, 12 diversity antenna, disabling, 13 limit, matching coaxial connections, 11 location, considerations, 13 matching, considerations, 12 maximum cable loss, 11 HSPA+ frequency band support, 11 B bands supported, RF HSPA+, 11 LTE, 11 I impedance module-antenna, 13 interference device generated, 15 host-generated, 15 power supply noise, 14 wireless devices, 14 L LTE C frequency band support, 11 cable
Document SubTitle RF antenna cable loss, maximum, 11 antenna connection, considerations, 11 connectors, required, 8 desense device-generated, 15 harmonic energy, filtering, 14 mitigation suggestions, 13 shielding suggestions, 13 integration, 11– 15 interference other devices, 15 power supply, 14 wireless devices, 14 RF bands supported HSPA+, 11 LTE, 11 RSE, 14 S sensitivity radiated measurement, overview, 14 shielding module, compliance, 12 reducing RF desense, 13 SIM connector, required, 8 U UDK (Univer
