AirPrime EM7355 Hardware Integration Guide 4112880 Rev 2 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 and MMP Portfolio Licensing. 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 . . . . . . . . . . . . .
Hardware Integration Guide 6 Proprietary and Confidential - Contents subject to change 4112880
1 1: Introduction The Sierra Wireless EM7355 Embedded Module is an M.2 modem that provides LTE, DC-HSPA+, HSPA+, HSDPA, HSUPA, WCDMA, GSM, GPRS, EDGE, CDMA, and GNSS connectivity for notebook, ultrabook, and tablet computers over several radio frequency bands. The device also supports 2G / 3G roaming. Accessories A hardware development kit is available for AirPrime M.2 modules.
Hardware Integration Guide 8 Proprietary and Confidential - Contents subject to change 4112880
2 2: Power Power supply The host provides power to the EM7355 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 EM7355 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 EM7355 operates on the frequency bands listed below.
Hardware Integration Guide Table 3-3: GSM frequency band support (Continued) Band Frequencies GSM 1800 Tx: 1710–1785 MHz Rx: 1805–1880 MHz GSM 1900 Tx: 1850–1910 MHz Rx: 1930–1990 MHz Table 3-4: CDMA frequency band support Band Frequencies Band Class 0 (Cellular 800 MHz) Tx: 824–849 MHz Rx: 869–894 MHz Band Class 1 (PCS) Tx: 1850–1910 MHz Rx: 1930–1990 MHz Tx: 817–824 MHz Band Class 10 (Secondary 800 MHz)1 Rx: 862–869 MHz 1.
RF Specifications Antenna and cabling When selecting the antenna and cable, it is critical to RF performance to match antenna gain and cable loss. Choosing the correct antenna and cabling When matching antennas and cabling: • The antenna (and associated circuitry) should have a nominal impedance of 50 : with a return loss of better than 10 dB across each frequency band of operation. • The system gain value affects both radiated power and regulatory (FCC, IC, CE, etc.) test results.
Hardware Integration Guide 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 module’s mounting hole. • Minimize ground noise leakage into the RF. Depending on the host board design, noise could potentially be coupled to the module from the host board.
RF Specifications Proximity of host electronics to the antenna in wireless devices can contribute to decreased Rx performance. Components that are most likely to cause this include: • Microprocessor and memory • Display panel and display drivers • Switching-mode power supplies Device-generated RF interference The module can cause interference with other devices. Wireless devices such as AirPrime embedded modules transmit in bursts (pulse transients) for set durations (RF burst frequencies).
Hardware Integration Guide Note: GSM spurious emissions are most likely to have RSE issues, but in general, RSE requirements must be met on all models with user-designed antennas. Radiated sensitivity measurement A wireless host device contains many noise sources that contribute to a reduction in Rx performance. To determine the extent of any receiver performance desensitization due to selfgenerated noise in the host device, over-the-air (OTA) or radiated testing is required.
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 Certification and Engineering Bureau of Industry Canada (IC) • The National Communications Commission (NCC) of Taiwan, Republic of China Upon commercial release, the following industry certifications will have been obtaine
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 EM7355 modem MUST BE POWERED OFF. Otherwise, the EM7355 modem can transmit signals that could interfere with this equipment. In an aircraft, the EM7355 modem 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.
Hardware Integration Guide The end product with an embedded EM7355 modem may also need to pass the FCC Part 15 unintentional emission testing requirements and be properly authorized per FCC Part 15. Note: If this module is intended for use in a portable device, you are responsible for separate approval to satisfy the SAR requirements of FCC Part 2.1093 and IC RSS-102.
5 5: Acronyms Table 5-1: Acronyms and definitions Acronym or term Rev 2 Feb.13 Definition 1xEV-DO Single Carrier (1X) EVolution – Data Only. A high-speed standard for cellular packet data communications. Supports Internet connections with data rates up to 3.1 Mbps (downlink from the network) and 1.8 Mbps (uplink to the network). Average data rates are roughly: for Rev. A: 600 1300 kbps (downlink from the network) and 300 400 kbps (uplink to the network); for Rev.
Hardware Integration Guide Table 5-1: Acronyms and definitions (Continued) Acronym or term Definition Decibel = 10 x log10 (P1/P2) P1 is calculated power; P2 is reference power dB Decibel = 20 x log10 (V1/V2) V1 is calculated voltage, V2 is reference voltage 22 dBm A logarithmic (base 10) measure of relative power (dB for decibels); relative to milliwatts (m). A dBm value will be 30 units (1000 times) larger (less negative) than a dBW value, because of the difference in scale (milliwatts vs.
Acronyms Table 5-1: Acronyms and definitions (Continued) Acronym or term Rev 2 Feb.13 Definition FSN Factory Serial Number—A unique serial number assigned to the mini card during manufacturing. GCF Global Certification Forum GLONASS Global Navigation Satellite System—A Russian system that uses a series of 24 satellites in middle circular orbit to provide navigational data.
Hardware Integration Guide Table 5-1: Acronyms and definitions (Continued) Acronym or term 24 Definition LPM Low Power Mode LPT Line Print Terminal LTE Long Term Evolution—a high-performance air interface for cellular mobile communication systems. MCS Modulation and Coding Scheme MHz Megahertz = 10e6 Hz MEID Mobile Equipment Identifier—The unique second-generation serial number assigned to the minicard for use on the wireless network.
Acronyms Table 5-1: Acronyms and definitions (Continued) Acronym or term Rev 2 Feb.13 Definition QOS Quality of Service QPSK Quadrature Phase-Shift Keying QPST Qualcomm Product Support Tools RAT Radio Access Technology RF Radio Frequency RI Ring Indicator roaming A cellular subscriber is in an area where service is obtained from a cellular service provider that is not the subscriber’s provider.
Hardware Integration Guide Table 5-1: Acronyms and definitions (Continued) Acronym or term 26 Definition SUPL Secure User Plane Location TIA/EIA Telecommunications Industry Association / Electronics Industry Association. A standards setting trade organization, whose members provide communications and information technology products, systems, distribution services and professional services in the United States and around the world. Consult www.tiaonline.org.
Index A accessories, 7 acronyms and definitions, 21– 26 antenna connection considerations, 12 custom, design, 13 diversity antenna, disabling, 13 limit, matching coaxial connections, 12 location, considerations, 13 matching, considerations, 13 maximum cable loss, 12 routing, 13 approvals, regulatory and industry, 17 B frequency band support CDMA, 12 GSM, 11, 12 LTE, 11 WCDMA, 11 G gain maximum, 18 grounding connection considerations, 14 GSM frequency band support, 11, 12 I bands supported, RF CDMA, 12
Hardware Integration Guide RF antenna cable loss, maximum, 12 antenna connection, considerations, 12 connectors, required, 7 desense device-generated, 14 harmonic energy, filtering, 15 mitigation suggestions, 15 shielding suggestions, 15 interference other devices, 15 wireless devices, 14 RF bands supported CDMA, 12 GSM, 11, 12 LTE, 11 WCDMA, 11 RF specifications, 11– 16 RSE, 15 S sensitivity radiated measurement, overview, 16 shielding module, compliance, 12 reducing RF desense, 15 SIM connector, require
