Xplore Technologies MC7750 CELLULAR/PCS GSM/EDGE/WCDMA/CDMA+ 700 MHz LTE MODEM User Manual
Xplore Technologies CELLULAR/PCS GSM/EDGE/WCDMA/CDMA+ 700 MHz LTE MODEM
User Manual
Product Technical Specification
& Customer Design Guidelines
AirPrime MC7750
2400074
Rev 4
Distribution under NDA only
Contents subject to change
Preface
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 3
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. Although significant delays or losses of data are rare when wireless
devices such as the Sierra Wireless modem are used in a normal manner with a
well-constructed network, the Sierra Wireless modem should not be used in
situations where failure to transmit or receive data could result in damage of any
kind to the user or any other party, including but not limited to personal injury,
death, or loss of property. Sierra Wireless accepts no responsibility for damages
of any kind resulting from delays or errors in data transmitted or received using
the Sierra Wireless modem, or for failure of the Sierra Wireless modem to
transmit or receive such data.
Safety and
Hazards
Do not operate the Sierra Wireless modem in areas where blasting is in progress,
where explosive atmospheres may be present, near medical equipment, near life
support equipment, or any equipment which may be susceptible to any form of
radio interference. In such areas, the Sierra Wireless modem MUST BE
POWERED OFF. The Sierra Wireless modem can transmit signals that could
interfere with this equipment.
Do not operate the Sierra Wireless modem in any aircraft, whether the aircraft is
on the ground or in flight. In aircraft, the Sierra Wireless modem MUST BE
POWERED OFF. When operating, the Sierra Wireless modem can transmit
signals that could interfere with various onboard systems.
Note: Some airlines may permit the use of cellular phones while the aircraft is on the
ground and the door is open. Sierra Wireless modems may be used at this time.
The driver or operator of any vehicle should not operate the Sierra Wireless
modem while in control of a vehicle. Doing so will detract from the driver or
operator's control and operation of that vehicle. In some states and provinces,
operating such communications devices while in control of a vehicle is an offence.
Limitation of
Liability
The information in this manual is subject to change without notice and does not
represent a commitment on the part of Sierra Wireless. SIERRA WIRELESS AND
ITS AFFILIATES SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL
DIRECT, INDIRECT, SPECIAL, GENERAL, INCIDENTAL, CONSEQUENTIAL,
PUNITIVE OR EXEMPLARY DAMAGES INCLUDING, BUT NOT LIMITED TO,
LOSS OF PROFITS OR REVENUE OR ANTICIPATED PROFITS OR REVENUE
ARISING OUT OF THE USE OR INABILITY TO USE ANY SIERRA WIRELESS
PRODUCT, EVEN IF SIERRA WIRELESS AND/OR ITS AFFILIATES HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR THEY ARE
FORESEEABLE OR FOR CLAIMS BY ANY THIRD PARTY.
Notwithstanding the foregoing, in no event shall Sierra Wireless and/or its
affiliates aggregate liability arising under or in connection with the Sierra Wireless
product, regardless of the number of events, occurrences, or claims giving rise to
liability, be in excess of the price paid by the purchaser for the Sierra Wireless
product.
Product Technical Specification & Customer Design Guidelines
4 Proprietary and Confidential - Contents subject to change 2400074
Patents This product may contain technology developed by or for Sierra Wireless Inc.
This product includes technology licensed from QUALCOMM® 3G.
This product is manufactured or sold by Sierra Wireless Inc. or its affiliates under
one or more patents licensed from InterDigital Group.
Copyright ©2011 Sierra Wireless. All rights reserved.
Trademarks AirCard® and Watcher™ are registered trademarks of Sierra Wireless. Sierra
Wireless™, AirPrime™ and the Sierra Wireless logo are trademarks of Sierra
Wireless.
Windows® and Windows Vista® are registered trademarks of Microsoft
Corporation.
Macintosh and Mac OS X are registered trademarks of Apple Inc., registered in
the U.S. and other countries.
QUALCOMM® is a registered trademark of QUALCOMM Incorporated. Used
under license.
Other trademarks are the property of their respective owners.
Contact
Information
Consult our website for up-to-date product descriptions, documentation,
application notes, firmware upgrades, troubleshooting tips, and press releases:
www.sierrawireless.com
Sales Desk: Phone: 1-604-232-1488
Hours: 8:00 AM to 5:00 PM Pacific Time
E-mail: sales@sierrawireless.com
Post: Sierra Wireless
13811 Wireless Way
Richmond, BC
Canada V6V 3A4
Fax: 1-604-231-1109
Web: www.sierrawireless.com
Preface
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 5
Revision
History
Revision
number Release date Changes
1August 2010 Initial release.
2January 2011 Resolved most TBDs.
Removed references to dial-up networking.
Updated Figure 4-1, System block diagram, on page 24;
Figure 4-2, Expanded RF block diagram, on page 25;
Figure 8-2, Dimensioned view, on page 54.
Updated Table 5-5, Conducted Rx (Receive) sensitivity, on page 43; Table 6-1,
Averaged standby DC power consumption, on page 45;
Table 6-3, Averaged call mode DC power consumption (LTE), on page 46;
Table 6-4, Averaged Call Mode DC power consumption (GSM / EDGE), on page 70.
Added a list of tables and list of figures.
Removed unused glossary entries.
3May 2011 General review and redraft
4September 2011 Updated LED table
Removed UMTS/GSM references
Updated LTE power consumption
Added suggested antenna part number
Product Technical Specification & Customer Design Guidelines
6 Proprietary and Confidential - Contents subject to change 2400074
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 7
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Supported RF bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Physical features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Application interface features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Packet mode features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
LTE features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Short Message Service (SMS) features. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Position location (GPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Warranty and support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Supporting documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Required connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Integration requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Technology Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
LTE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CDMA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1xEV-DO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
1X and IS-95A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Host interface pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
USB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
USB high / full speed throughput performance . . . . . . . . . . . . . . . . . . . . .29
User-developed drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
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SIM interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SIM implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Control interface (Signals) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
W_DISABLE_N — Wireless disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
WLAN_LED_N — LED output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Digital interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
RF Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
RF connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Antenna and cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Ground connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Interference and sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Interference from other wireless devices . . . . . . . . . . . . . . . . . . . . . . . . . 39
Host-generated RF interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Device-generated RF interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Methods to mitigate decreased Rx performance . . . . . . . . . . . . . . . . . . . 40
Radiated Spurious Emissions (RSE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Radiated sensitivity measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Sierra Wireless’ sensitivity testing and desensitization investigation . . . 41
Sensitivity vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Supported frequencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Conducted Rx sensitivity / Tx power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
GPS specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Module power states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Power state transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Contents
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 9
Power interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Power ramp-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Power-up timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Power supply noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
SED (Smart Error Detection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Software Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Support tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
USB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
TCP window size (Windows XP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Mechanical and Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . .53
Device views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Labeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Electrostatic discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Regulatory and Industry Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Safety and hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Important compliance information for North American users . . . . . . . . . . . . 60
OEM integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Application of regulatory guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
OEM device classification process . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Antenna Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Recommended GPS antenna specifications . . . . . . . . . . . . . . . . . . . . . . . . 67
Antenna tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Design Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
AT command entry timing requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
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Acceptance testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Acceptance test requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Acceptance test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Certification testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Production testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Functional production test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Production test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Testing CDMA RF Receive path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
LTE RF receive path test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
GPS standalone connector test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Quality assurance testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Suggested testing equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Testing assistance provided by Sierra Wireless . . . . . . . . . . . . . . . . . . . . . 81
IOT/Operator testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Extended AT commands for testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Web site support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Sierra Wireless documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Command documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Other Sierra documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Industry / other documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 11
List of Tables
Table 1-1: Supported RF bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 1-2: Required host-module connectors . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 3-1: Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 4-1: Connector pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 4-2: Power and ground specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 4-3: USB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 4-4: SIM interface signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 4-5: Module control signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 4-6: LED states (Default behavior) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 4-7: GPIO signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 5-1: LTE frequency band support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 5-2: LTE bandwidth support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 5-3: CDMA frequency band support . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 5-4: Conducted Rx (Receive) sensitivity — LTE bands . . . . . . . . . . . . . . 42
Table 5-5: Conducted Rx (Receive) sensitivity — CDMA bands . . . . . . . . . . . . 42
Table 5-6: Conducted Tx (Transmit) power tolerances . . . . . . . . . . . . . . . . . . . 43
Table 5-7: GPS specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 6-1: Averaged standby DC power consumption . . . . . . . . . . . . . . . . . . . 45
Table 6-2: CDMA DC power consumption (+3.3V) . . . . . . . . . . . . . . . . . . . . . . 46
Table 6-3: Averaged call mode DC power consumption (LTE) . . . . . . . . . . . . . 46
Table 6-4: Miscellaneous DC power consumption . . . . . . . . . . . . . . . . . . . . . . 47
Table 6-5: Module power states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 6-6: Power state transitions (including voltage / temperature trigger levels). .
48
Table 8-1: Mechanical and environmental specifications . . . . . . . . . . . . . . . . . 53
Table A-1: Antenna requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table A-2: GPS standalone antenna requirements. . . . . . . . . . . . . . . . . . . . . . 67
Table B-1: Hardware integration design considerations . . . . . . . . . . . . . . . . . . 69
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Table C-1: Test settings — Receive path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Table C-2: Extended AT commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Table F-1: Acronyms and definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
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List of Figures
Figure 4-1: System block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 4-2: Expanded RF block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 4-3: SIM application interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 4-4: SIM card contacts (contact view) . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 4-5: Recommended wireless disable connection . . . . . . . . . . . . . . . . . . 33
Figure 4-6: Example LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 5-1: Module connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 6-1: Voltage / temperature monitoring state machines . . . . . . . . . . . . . . 49
Figure 6-2: Power-up timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 8-1: Top and bottom views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 8-2: Dimensioned view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 8-3: Unit label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 8-4: Shield locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 4-1: Device placement in module tray . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Figure 4-2: Shipping package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Product Technical Specification & Customer Design Guidelines
14 Proprietary and Confidential - Contents subject to change 2400074
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 15
1
1: Introduction
The Sierra Wireless MC7750 PCI Express Mini Card is a compact,
lightweight, wireless LTE - and CDMA-based modem, designed to be
Verizon Wireless certified.
The MC7750 provides LTE, CDMA, and GPS connectivity for
portable and handheld computers, point-of-sale devices, telemetry
products and other machine-to-machine and vertical applications
over several radio frequency bands.
Supported RF bands
The modem, based on Qualcomm's MDM9600 baseband processor,
supports data operation on LTE and CDMA networks.
Physical features
•Small form factor—conforms to F1 as specified in PCI Express
Mini Card Electromechanical Specification Revision 1.2.
•Operating temperature range: -30 °C to +60 °C
Application interface features
•USB interface (QMI )
•NDIS NIC interface support for Windows 7, Windows Vista, and
Windows XP platforms
•Multiple non-multiplexed USB channel support
•USB selective suspend to maximize power savings
•AT command interface ([1] AT Command Set for User Equipment
(UE) (Release 6) (Doc# 3GPP TS 27.007), plus proprietary
extended AT commands)
•Software Development Kit (SDK) including a Linux API (Appli-
cation Program Interface)
Table 1-1: Supported RF bands
Technology Bands Diversity
LTE •Band 13: 700 MHz
(MIMO)
CDMA •Cellular (800 MHz)
•PCS (1900 MHz)
GPS •1575.42 MHz n/a
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•WMC DLL support for Verizon Wireless PC-OEM (Windows)OMA DM (Open
Mobile Alliance Device Management)FOTA (Firmware Over The Air)
Packet mode features
•LTE data rates (category 3, MIMO)
·100 Mbps DL within 20 MHz bandwidth
·50 Mbps UL within 20 MHz bandwidth
•CDMA IS-856 (1xEV-DO Rev. A) data rates
·Up to 3.1 Mbps forward channel
·Up to 1.8 Mbps reverse channel
•CDMA IS-2000 data rates — Up to 153 kbps, simultaneous forward and
reverse channel
•Circuit-switched data bearers (up to 14.4 for CDMA)
LTE features
•Basic cell selection and system acquisition
·PSS / SSS / MIB decode
·SIB1, SIB2, SIB3 decoding
•NAS / AS security procedures
·Snow 3G/AES security
•CQI / RI reporting
•Paging procedures
·Paging in Idle and Connected mode
•Dedicated bearer
·Network-initiated dedicated bearer
·UE-initiated dedicated bearer
•Multiple PDN connections (IPv4 and IPv6 combinations)
•Connected mode intra-LTE mobility
•Idle mode intra-LTE mobility
•iRAT between LTE / 2G (future release)
iRAT between LTE / 3G for idle and connection release with redirection (future
release)
•Detach procedure
·Network-initiated detach with reattach required
·Network-initiated detach followed by connection release
•LTE eHRPD redirection with data continuity (IPv4/IPv6)
Short Message Service (SMS) features
•Mobile-terminated SMS for CDMA
•Mobile-originated SMS for CDMA
•Mobile-terminated SMS over IMS for LTE / eHRPD
Introduction
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 17
•Mobile-originated SMS over IMS for LTE / eHRPD
Position location (GPS)
•Standalone mode
•GLONASS support on GPS connector 1 (future release)
•DC bias on GPS connector 1 to support external active GPS antenna
Warranty and support
The MC7750 offers the following support features:
•Standard 1-year warranty
•Enabling software (drivers, SDK, etc.) for Android, Linux, Windows 7,
Windows Vista, and Windows XP
Supporting documents
Several additional documents describe Mini Card design, usage, integration, and
other features. See References on page 87.
Accessories
The Universal Development Kit (UDK) is a hardware development platform for
AirPrime MC-series modules. It contains hardware components for evaluating
and developing with the module, including:
•Development board
•Cables
•Antennas (Bands 17, 13, and 7 are not supported by supplied antennas)
•Documentation suite
•Initial allotment of support hours
•Other accessories
For instructions on setting up the UDK, see [4] PCI Express Mini Card Dev Kit
Quick Start Guide (Doc# 2130705).
For over-the-air LTE testing, ensure that suitable antennas are used. (Two
antennas are required for this testing; Sierra Wireless offers an LTE-capable
antenna covering 700–2600 MHz BW — please order part number 6000492
(Qty 1 — this contains two antennas).)
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Required connectors
Tab l e 1-2 describes the connectors used to integrate AirPrime MC-series
modules into your host device.
Ordering information
To order, contact the Sierra Wireless Sales Desk at +1 (604) 232-1488 between
8 AM and 5 PM Pacific Time.
Integration requirements
Sierra Wireless provides, in the document suite, guidelines for successful Mini
Card integration and offers integration support services as necessary.
When integrating the MC7750 PCI-Express Mini Card, the following items need to
be addressed:
•Mounting—Effect on temperature, shock, and vibration performance
•Power supply—Impact on battery drain and possible RF interference
•Antenna location and type—Impact on RF performance
•Regulatory approvals—As discussed in Regulatory and Industry Approvals on
page 59.
•Service provisioning—Manufacturing process
•Software—As discussed in Software Interface on page 51.
•Host Interface, compliance with interface voltage levels
Table 1-2: Required host-module connectors1
1. Manufacturers/part numbers are for reference only and are subject to change. Choose
connectors that are appropriate for your own design.
Connector type Description
RF cables •Mate with Hirose U.FL connectors
(model U.FL #CL331-0471-0-10)
•Two or three connector jacks, depending on module
support for diversity and GPS functionality. (Note: The
UDK has two connector jacks.)
EDGE (52-pin) •Industry-standard mating connector
•Some manufacturers include Tyco, Foxconn, Molex
•Example: UDK board uses Molex 67910-0001
SIM •Industry-standard connector. Type depends on how host
device exposes the SIM socket
•Example: UDK board uses ITT CCM03-3518
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 19
2
2: Technology Overview
LTE
LTE (Long Term Evolution) is a 4th-generation wireless standard.
The 3GPP Release 8 specification outlines the features and
requirements.
Key features include.
•Peak data rate:
·100 Mbps DL within 20 MHz bandwidth
(Peak DL data rate in 10 MHz bandwidth: 70 Mbps (approx.) for
Cat 3 device)
·50 Mbps UL within 20 MHz bandwidth
Actual throughput is dependent on the network configuration,
bandwidth assigned to the UE, the number of users, and RF sig-
nal conditions.
•Up to 200 active users in a cell (5 MHz)
•Less than 5 ms user-plane latency
•Supported bandwidths: 5 MHz / 10 MHz
•Spectrum flexibility: 1.4–20 MHz (3–20 MHz in future F/W
release)
•Enhanced support for end-to-end QOS
•Physical layer uses:
·DL: OFDMA (Orthogonal Frequency Division Multiple Access).
Modulation: QPSK, 16QAM, and 64QAM
·UL: Single Carrier FDMA (single carrier modulation and
orthogonal frequency multiplexing)
Modulation: QPSK, 16QAM
•MIMO (Multi-Input Multi-Output) antenna support
CDMA
1xEV-DO
1xEV-DO is backwards compatible to both 1X and IS-95A/B
standards. However, 1xEV-DO represents an evolutionary
enhancement, specifically designed and optimized for high-speed
wireless data access. This was driven by fundamental differences
between voice and data traffic characteristics.
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eHRPD (Enhanced High Rate Packet Data) is an enhancement of 1xEV-DO that
enables LTE to CDMA handover.
To optimize for data, there are some fundamental characteristics and differences
between 1X and 1xEV-DO, including:
•The network has dedicated spectrum (1.25 MHz) for data traffic using
1xEV-DO standard, so resources don’t compete with 1X data/voice (hybrid
mode used to monitor 1X carriers)
•BTS always transmits at maximum available power
•Each user receives data from only one base station at a time (no forward link
soft handoff)
•1xEV-DO lets each user use 100% of available resources, while dynamically
allocating time resources among users for maximum efficiency
•1xEV-DO uses time-division multiplexing of users on forward link (slots
assigned for packet transmission)
•Forward link supports higher order modulation (QPSK, 8-PSK and 16-QAM)
•Reverse link (1xEV-DO Revision A) supports higher order modulation
(8-PSK)
•Mobile supports dynamic channel estimation using measured S/N to set the
highest rate it can decode (uses Data Rate Control channel to communicate
to network access point)
•Mobiles can support Rx diversity for S/N enhancements particularly in multi-
path/fading environments
1X and IS-95A
The type of data connection made at any given time depends on the services
available from the carrier in the given coverage area. If 1X packet services are not
available, the modem connects using circuit-switched data over IS-95A
technology. The modem automatically selects the fastest connection mode
available when a data call is connecting.
When roaming, the modem does not automatically change connection modes. If
the modem connects using 1X and then roams outside of the packet service area,
the connection is dropped. To resume data communication, a new connection
using IS-95A has to be created. Similarly, an IS-95A call established in one area
does not automatically transition to 1X when the unit enters the 3G coverage
area.
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 21
3
3: Standards Compliance
The MC7750 Mini Card complies with the mandatory requirements
described in the following standards. The exact set of requirements
supported is carrier-dependent.
Table 3-1: Standards compliance
Technology Standards
LTE •3GPP Release 8
CDMA •TIA/EIA/IS-2000.1 through .6. cdma2000®
Standards for Spread Spectrum Systems.
Release 0. April 2000
•TIA/EIA/IS-2000.1-1 through .6-1. cdma2000®
Addendum 1. April 2000
•TIA/EIA/IS-2000.1-2 through .6-2. cdma2000®
Addendum 2. June 2001
•TIA/EIA/IS-95-B. Mobile Station-Base Station
Compatibility Standard for Dual-Mode Spread
Spectrum Systems. December 4, 1998
•TIA/EIA/IS-. cdma2000® High Rate Packet Data
Air Interface Specification. November 2000
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Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 23
4
4: Electrical Specifications
The system block diagram in Figure 4-1 represents the MC7750
module integrated into a host system. The module includes the
following interfaces to the host:
•Power — Supplied to the module by the host.
•W_DISABLE_N — Active low input from a hardware switch to the
MC7750 that disables the main RF radio.
•WLAN_LED_N — Active-low LED drive signal provides an
indication of RADIO ON state, either WAN or GPS.
•Antenna — Three U.FL RF connectors (two for Rx / Tx, and one for
GPS). For details, see RF Specifications on page 37.
Note that GPS can use either the dedicated GPS port, or the
diversity/MIMO port. GLONASS is supported only on the
dedicated GPS port.
•SIM — Supported through the interface connector. The SIM
cavity / connector must be placed on the host device for this
feature.
•USB — Interface to the host for data, control, and status infor-
mation.
•GPIO — Six GPIOs reserved for future use.
The MC7750 has two main interface areas — the host I/O connector
and the RF ports. Details of these interfaces are described in the
sections that follow.
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24 Proprietary and Confidential - Contents subject to change 2400074
Figure 4-1: System block diagram
External NAND
1Gb NAND EBI2
GPIO55
GPIO56
GPIO57
PCB ID
GPIO65
GPIO66
GPIO67
GPIO68
GPIO69
GPIO70
HW Rev ID
HW_ID_0
HW_ID_1
HW_ID_2
HW_ID_3
HW_ID_4
HW_ID_5
PCB_ID_0
PCB_ID_1
PCB_ID_2
W_DISABLE_N
VCC_3.3V
GPIO_1
USIM
HS-
USB
GPIO25
GPIO24
GPIO23
MFG MODE
MFG_MODE0_N
MFG_MODE1_N
MFG_MODE2_N
GPIO_2
GPIO_3
GPIO_4
USIM VPH/
VBAT
KPD_PWR_N
BATT_ID/MPP8
BATT_THERM/MPP7
WLAN_LED_N
GPIO102
PS_HOLD
GPIO8 PM_INT_N
MPM_GPIO_1
MPM_GPIO_2 PMIC_SSBI
TCXO_EN
RF + GRFC_GPIO
RF
BLOCK
MDM9600
PM8028
INTERFACE CONNECTOR
VGA_MONITOR
VGA_UMTS_MONITOR
MPP11
PWM_OUT
MPP4
PA_BOOST_EN
XTAL_19M_IN
XO_OUT_D0
XO_OUT_A0
VCTCXO_DFF
TCXO_RTR
VCTCXO
XO_OUT_EN
PM_INT_N
SSBI
Internal
64MB DDR
SDRAM
USIM
GPIO_5
GPIO_6
Electrical Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 25
Figure 4-2: Expanded RF block diagram
Host interface pin assignments
The MC7750 host I/O connector provides pins for power, serial communications,
and control. Pin assignments are listed in Tabl e 4-1. See the following tables for
pin details based on interface types:
•Tab l e 4-2, Power and ground specifications, on page 29
•Tab l e 4-3, USB interface, on page 29
•Tab l e 4-4, SIM interface signal, on page 30
•Tab l e 4-5, Module control signals, on page 33
Note: On any given interface (USB, SIM, etc.), leave unused inputs and outputs as no-
connects.
Diplexer
SP5T
DRX_LB2
B8
B8
PRX_LB1
BC0+B5+GSM850
B8+GSM900
PRX_LB2
PRX_MB2
PRX_MB1
DRX_MB1
B13
B13
DRX_LB1
DRX_MB2
DRX_HB B1d
BC0/B5
GSM850/900
GSM1800/1900
TX_LB4
TX_MB1
TX_LB2
TX_LB1
TX_LB3
TX_MB3
RF Diversity/GPS
Connector 2
SP2T
GPS
LNA
GNSS
SP2T
PA
RF Main
Connector
SP10T
RTR8600
B1
BC1/B2
SP2T
PRX_I
DRX_Q
PRX_Q
DRX_I
BASEBAND:
MDM9600 or
PMIC8028
GNSS_I
GNSS_Q
TX_I
TX_Q
Jammer Det
TCXO
DAC_REF
RTR_SSB
GNSS
Connector 1
B13d
BC1d + B2d
BC0d + B5d + B8d
Power Det
B1d
GSM1800 + GSM1900
TX_MB4
B1
BC1 + B2
BC0 + B5
B13
BC1/B2
B1 PA
PA
PA
PA
PA
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Note: The following table describes the internal structure of the module.
GPIO pins are reserved for future use. For applications not requiring GPIO functionality,
leave these pins not connected on the host.
Table 4-1: Connector pin assignments1
Pin Signal name Pin
type2Description Direction
to module Active
state
Voltage levels (V)
Min Typ Max
1NC -No connect
Reserved for future
use.
- - - - -
2VCC V3.3 V supply Input Power 3.0 3.3 3.6
3NC -No connect
Reserved for future
use
- - - - -
4GND VGround Input Power - 0 -
5NC -No connect
Reserved for future
use
- - - - -
6GPIO1 -General purpose I/O Input high -1.17 1.80 2.10
Input low --0.3 -0.63
Output high -1.35 -1.80
Output low - 0 - 0.45
7NC -No connect - - - - -
8USIM_PWR -SIM VCC supply Output Power 2.95 (3V SIM)
1.75 (1.8V SIM)
3.00 (3V SIM)
1.8 (1.8V SIM)
3.05 (3V SIM)
1.85 (1.8V SIM)
9GND VGround Input Power - 0 -
10 USIM_DATA -SIM IO pin Input Low -0.3 (3V SIM)
-0.3 (1.8V SIM)
-1.05 (3V SIM)
0.63 (1.8V SIM)
High 1.95 (3V SIM)
1.17 (1.8V SIM)
3.0 (3V SIM)
1.8 (1.8V SIM)
3.3 (3V SIM)
2.1 (1.8V SIM)
Output Low 0 - 0.45
High 2.55 (3V SIM)
1.35 (1.8V SIM)
-3.0 (3V SIM)
1.8 (1.8V SIM)
11 NC -No connect - - - - -
12 USIM_CLK -SIM Clock Output Low 0 - 0.45
High 2.55 (3V SIM)
1.35 (1.8V SIM)
-3.0 (3V SIM)
1.8 (1.8V SIM)
13 NC -No connect - - - - -
Electrical Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 27
14 USIM_RST -SIM Reset Output Low 0 - 0.45
High 2.55 (3V SIM)
1.35 (1.8V SIM)
-3.0 (3V SIM)
1.8 (1.8V SIM)
15 GND VGround Input Power - 0 -
16 GPIO2 -General purpose I/O Input high -1.17 1.80 2.10
Input low --0.3 -0.63
Output high -1.35 -1.80
Output low - 0 - 0.45
17 NC -No connect - - - - -
18 GND VGround Input Power - 0 -
19 NC -No connect - - - - -
20 W_DISABLE_N -Wireless Disable (main
RF radio) Input Low - - 0.4
21 GND VGround Input Power - 0 -
22 NC -No connect - - - - -
23 NC -No connect - - - - -
24 VCC V3.3 V supply Input Power 3.0 3.3 3.6
25 NC -No connect - - - - -
26 GND VGround Input Power - 0 -
27 GND VGround Input Power - 0 -
28 GPIO3 -General purpose I/O Input high -1.17 1.80 2.10
Input low --0.3 -0.63
Output high -1.35 -1.80
Output low - 0 - 0.45
29 GND VGround Input Power - 0 -
30 NC -No connect - - - - -
31 NC -No connect - - - - -
32 NC -No connect - - - - -
33 NC -No connect - - - - -
34 GND VGround Input Power - 0 -
35 GND VGround Input Power - 0 -
36 USB_D- -USB data negative Input/Output Differential - - -
Table 4-1: Connector pin assignments1 (Continued)
Pin Signal name Pin
type2Description Direction
to module Active
state
Voltage levels (V)
Min Typ Max
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37 GND VGround Input Power - 0 -
38 USB_D+ -USB data positive Input/Output Differential - - -
39 VCC V3.3 V supply Input Power 3.0 3.3 3.6
40 GND VGround Input Power - 0 -
41 VCC V3.3 V supply Input Power 3.0 3.3 3.6
42 WLAN_LED_N -LED Driver Output Low 0 - 0.45
43 GND VGround Input Power - 0 -
44 GPIO4 -General purpose I/O Input high -1.17 1.80 2.10
Input low --0.3 -0.63
Output high -1.35 -1.80
Output low - 0 - 0.45
45 NC -No connect - - - - -
46 GPIO5 -General purpose I/O Input high -1.17 1.80 2.10
Input low --0.3 -0.63
Output high -1.35 -1.80
Output low - 0 - 0.45
47 NC -No connect - - - - -
48 GPIO6 -General purpose I/O Input high -1.17 1.80 2.10
Input low --0.3 -0.63
Output high -1.35 -1.80
Output low - 0 - 0.45
49 NC -No connect - - - - -
50 GND VGround Input Power - 0 -
51 NC -No connect
Reserved for future
use
- - - - -
52 VCC V3.3 V supply Input Power 3.0 3.3 3.6
1. The host should leave all ‘NC’ (‘no connect) pins unconnected.
2. A —Analog; I — Input; NP — No pull; O — Digital output; PU — Digital input (internal pull up); PD — Digital output (internal pull down);
V — Power or ground
Table 4-1: Connector pin assignments1 (Continued)
Pin Signal name Pin
type2Description Direction
to module Active
state
Voltage levels (V)
Min Typ Max
Electrical Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 29
Power supply
The host provides power to the MC7750 through multiple power and ground pins
as summarized in Ta bl e 4-2.
The host must provide safe and continuous power at all times; the module does
not have an independent power supply, or protection circuits to guard against
electrical issues.
USB interface
The USB interface is the path for communication between the host and module.
The interface complies with the [12] Universal Serial Bus Specification, Rev 2.0,
and the host device must be designed to the same standard. (When designing
the host device, careful PCB layout practices must be followed.)
USB interface features include:
•Data rate: Full-speed (12 Mbps) / High-speed (480 Mbps)
•Module enumeration:
·Windows: Modem or COM ports, using host Windows drivers
·Linux: / dev / ttyUSBn devices for Linux systems with the Sierra Wireless
driver installed
•USB-compliant transceivers
•Selective suspend mode
•Resumption initiated by host or module
USB high / full speed throughput performance
This device has been designed to achieve optimal performance and maximum
throughput using USB high speed mode. Although the device may operate with a
full speed host, throughput performance will be on an “as is” basis and needs to
Table 4-2: Power and ground specifications
Name Pins Specification Min Typ Max Units
VCC 2, 24, 39, 41, 52 Voltage range See Table 4-1 on page 26.
Ripple voltage --100 mVpp
GND 4, 9, 15, 18, 21, 26,
27, 29, 34, 35, 37,
40, 43, 50
- - 0 - V
Table 4-3: USB interface
Name Pin Description
USB_D- 36 USB data negative
USB_D+ 38 USB data positive
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be characterized by the OEM. Note that throughput will be reduced and may vary
significantly based on packet size, host interface, and firmware revision. Sierra
Wireless does not recommend using this device in USB full speed mode.
User-developed drivers
If you will be developing your own USB drivers, see [5] AirCard / AirPrime USB
Driver Developer’s Guide (Doc# 2130634).
SIM interface
The module supports one SIM (Subscriber Identity Module) (1.8 V or 3 V). The
SIM holds account information, allowing users to use their account on multiple
devices.
The SIM pins (Ta b l e 4-4) provide the connections necessary to interface to a SIM
socket located on the host device as shown in Figure 4-3 on page 31. Voltage
levels over this interface comply with 3GPP standards.
Table 4-4: SIM interface signal
Name Pin Description SIM contact
number1Notes
USIM_PWR 8SIM voltage 1Power supply for SIM
USIM_DATA 10 Data I/O 7Bi-directional SIM data line
USIM_CLK 12 Serial clock 3Serial clock for SIM data
USIM_RST 14 Reset 2Active low SIM reset
USIM_GND Ground 5Ground reference
USIM_GND is common to module ground
1. See Figure 4-4 on page 31 for SIM card contacts.
Electrical Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 31
Figure 4-3: SIM application interface
Figure 4-4: SIM card contacts (contact view)
AirPrime
embedded
module
SIM card connector
(Optional.
Locate near the
SIM socket)
47 pF, 51
4.7uF
X5R
typ
(C1)
USIM_PWR
USIM_CLK
USIM_DATA
USIM_RST
Located near
SIM socket
Located near SIM socket.
NOTE: Carefully consider if ESD
protection is required – it may
increase signal rise time and
lead to certification failure
USIM_GND
ESD
protection
(C3)
(C7)
(C2)
(C5)
(Optional.
Locate near the
SIM socket)
15 k - 30 k
0.1uF
C8
C7
C6
C5
C4
C3
C2
C1
GND VCC
VPP RST
I/O CLK
RFU RFU
Contact View (notched corner at top left)
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SIM implementation
Note: For interface design
requirements, refer to:
(2G) 3GPP TS 51.010-1,
section 27.17, or
(3G) ETSI TS 102 230
V5.5.0, section 5.2.
When designing the remote SIM interface, you must make sure that SIM signal
integrity is not compromised.
Some design recommendations include:
•Total impedance of the VCC and GND connections to the SIM, measured at
the module connector, should be less than 1 to minimize voltage drop
(includes any trace impedance and lumped element components — inductors,
filters, etc.).
•Position the SIM connector 10 cm from the module. If a longer distance is
required because of the host device design, use a shielded wire assembly —
connect one end as close as possible to the SIM connector and the other end
as close as possible to the module connector. The shielded assembly may
help shield the SIM interface from system noise.
•Reduce crosstalk on the USIM_DATA line to reduce the risk of failures during
GCF approval testing.
•Avoid routing the USIM_CLK and USIM_DATA lines in parallel over distances
2 cm — cross-coupling of these lines can cause failures.
•3GPP has stringent requirements for I / O rise time (<1 µs), signal level limits,
and noise immunity — consider this carefully when developing your PCB
layout.
·Keep signal rise time <1 µs — keep USIM signals as short as possible, and
keep very low capacitance traces on the USIM_DATA and USIM_CLK
signals. High capacitance increases signal rise time, potentially causing
your device to fail certification tests.
•Add external pull-up resistors (15 k–30 k), if required, between the
USIM_DATA and USIM_PWR lines to optimize the signal rise time.
•VCC line should be decoupled close to the SIM socket.
•SIM is specified to run up to 5 MHz (SIM clock rate). Take note of this speed
in the placement and routing of the SIM signals and connectors.
•You must decide whether additional ESD protection is required for your
product, as it is dependent on the application, mechanical enclosure, and SIM
connector design. The SIM pins will require additional ESD protection if they
are exposed to high ESD levels (i.e. can be touched by a user).
•Putting an optional decoupling capacitor at USIM_PWR near the SIM socket
is recommended — the longer the trace length (impedance) from the socket to
the module, the greater the capacitance requirement to meet compliance
tests.
•Putting an optional series capacitor and resistor termination (to ground) at
USIM_CLK at the SIM socket to reduce EMI and increase signal integrity is
recommended if the trace length between the SIM socket and module is
long — 47 pF and 50 resistor are recommended.
•Test your first prototype host hardware with a Comprion IT3 SIM test device at
a suitable testing facility.
Electrical Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 33
Control interface (Signals)
The MC7750 provides signals for:
•Power control of the module from the host
•LED driver output
These signals are summarized in Ta b l e 4-5 and paragraphs that follow.
W_DISABLE_N — Wireless disable
The host device uses W_DISABLE_N (pin 20) to enable / disable the WWAN or
radio modem. When disabled, the modem cannot transmit or receive information.
Letting this signal float high allows the module to operate normally. This switch
follows the behavior described in [11] PCI Express Mini Card Electromechanical
Specification Revision 1.2. This pin has a 20 k pull-up resistor. See Figure 4-5
on page 33 for a recommended implementation.
When integrating with your host device, keep the following in mind:
•The signal is an input to the module and should be driven LOW only for its
active state (controlling the power state); otherwise it should be floating or
(High impedance). It should never be driven to a logic high level. The module
has an internal pull-up resistor to Module Power (3.3V) in place, so if the
signal is floating or (high impedance), the module will power on.
•Wait for two seconds after asserting W_DISABLE_N before disconnecting
power.
•If the host never needs to assert this power state control to the module, leave
this signal unconnected from the host interface.
Figure 4-5: Recommended wireless disable connection
Table 4-5: Module control signals
Name Pin Description Type1
1. O — Digital pin Output; PU — Digital pin Input, internal pull up
W_DISABLE_N 20 Wireless disable (Main RF) PU
WLAN_LED_N 42 LED driver O
MiniCard
R
Wireless
disable control 1
2
3
Q
20k
Host
3.3V PMIC for W_DISABLE_N
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WLAN_LED_N — LED output
The module drives the LED output according to [11] PCI Express Mini Card
Electromechanical Specification Revision 1.2, as described in Tab le 4-6 (below).
If desired, LED behavior can be configured using AT!LEDCTRL.
Figure 4-6: Example LED
Table 4-6: LED states (Default behavior)
State
LED behavior
Description !LEDCTRL
index
Period (s) On Off
Off 00% 100% Module is not powered.
(W_DISABLE_N asserted with PCOFFEN=1) N/A
Airplane mode 250% 50% Module is in low power mode.
(W_DISABLE_N asserted with PCOFFEN=0) 4
Power up 5.2 96% 4% Module is performing initial power up activities. N/A
Searching 96% 4% Module is searching service. 1
Connected 0.5 80% 20% Module has an active context. 3
Connected, with data
transfer occuring 0.5 80% 20% Module has an active context and data is being
transferred. 5
Error 1.6 20% 80% Device error has occurred. N/A
Attached 1 100% 0% Module has attached to a network and is not
currently in a call. 2
Current limiting Resistor
LED
VCC 3.3V
MIO
MiniCard
Electrical Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 35
Digital interface
The MC7750 Mini Card provides the general purpose digital I/O (GPIO) signals
listed in Tabl e 4-7:
•By default, all GPIO pins are set as inputs.
•Voltage should not be applied until > 1s after VCC is applied to the minicard.
•GPIO pins are available for OEM-defined purposes but may, in future
firmware releases, be allocated by Sierra Wireless for specific functionality.
•For applications not requiring GPIO functionality, leave these pins not
connected on the host.
Table 4-7: GPIO signals
Name Pin Description Type1,2
1. GPIO pins are initialized as PD by the firmware.
2. PD — Digital pin Input, internal pull down
GPIO1 6General purpose IO PD
GPIO2 16 General purpose IO PD
GPIO3 28 General purpose IO PD
GPIO4 44 General purpose IO PD
GPIO5 46 General purpose IO PD
GPIO6 48 General purpose IO PD
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Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 37
5
5: RF Specifications
The MC7750 includes three RF connectors for use with host-supplied
antennas:
•Main RF connector — Rx / Tx path
•GPS connector 1 — Standalone GPS
•Diversity / MIMO / GPS connector 2 — Diversity, MIMO, or GPS
The module does not have integrated antennas.
Figure 5-1: Module connectors
RF connections
When attaching antennas to the module:
Note: To disconnect the
antenna, make sure you
use the Hirose U.FL
connector removal tool
(P / N UFL-LP-N-2(01)) to
prevent damage to the
module or coaxial cable
assembly.
•Use Hirose U.FL connectors (3 mm x 3 mm, low profile; model
U.FL #CL331-0471-0-10) to attach antennas to connection points
on the module, as shown in Figure 5-1 on page 37.
•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 holes to attach (ground) the device to the main PCB
ground or a metal chassis.
Note: If the antenna connection is shorted or open, the modem will not
sustain permanent damage.
Shielding
The module is fully shielded to protect against EMI and must not be
removed.
I/O connector
Main RF connector
GPS connector 1
Diversity/MIMO/GPS
connector 2
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Antenna and cabling
When selecting the antenna and cable, it is critical to RF performance to match
antenna gain and cable loss.
Note: For detailed electrical performance criteria, see Appendix A: Antenna Specification
on page 65.
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.
Designing custom antennas
Consider the following points when designing custom antennas:
•A skilled RF engineer should do the development to ensure that the RF
performance is maintained.
•If both CDMA and UMTS modules will be installed in the same platform, you
may want to develop separate antennas for maximum performance.
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 perfor-
mance.
•Connecting cables between the module and the antenna must have 50
impedance. If the impedance of the module is mismatched, RF performance
is reduced significantly.
•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. See Interference from other wireless devices on page 39.
Disabling the diversity antenna
•For LTE bands, use the AT command !RXDEN=0 to disable receive diversity or
!RXDEN=1 to enable receive diversity.
•For CDMA bands, use the AT command !DIVERSITY to enable or disable
receive diversity.
RF Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 39
Note: A diversity antenna is used to improve connection quality and reliability through
redundancy. Because two antennas may experience difference interference effects (signal
distortion, delay, etc.), when one antenna receives a degraded signal, the other may not be
similarly affected.
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 two mounting holes at the top of the
module (shown in Figure 5-1 on page 37).
•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. This is mainly an issue for host designs that
have signals traveling along the length of the module, or circuitry operating at
both ends of the module interconnects.
Interference and sensitivity
Several interference sources can affect the module’s RF performance
(RF desense). Common sources include power supply noise and device-
generated RF.
RF desense can be addressed through a combination of mitigation techniques
(Methods to mitigate decreased Rx performance on page 40) and radiated
sensitivity measurement (Radiated sensitivity measurement on page 41).
Note: The MC7750 is based on ZIF (Zero Intermediate Frequency) technologies. When
performing EMC (Electromagnetic Compatibility) tests, there are no IF (Intermediate
Frequency) components from the module to consider.
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.
•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.
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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.
Host-generated RF interference
All electronic computing devices generate RF interference that can negatively
affect the receive sensitivity of the module.
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). Hearing aids and speakers convert these burst
frequencies into audible frequencies, resulting in audible noise.
Methods to mitigate decreased Rx performance
It is important to investigate sources of localized interference early in the design
cycle. To reduce the effect of device-generated RF on Rx performance:
•Put the antenna as far as possible from sources of interference. The
drawback is that the module may be less convenient to use.
•Shield the host device. The module itself is well shielded to avoid external
interference. However, the antenna cannot be shielded for obvious reasons.
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.
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:
•(CDMA) Refer to CDMA standards for receive-only mode, and local
regulatory bodies for transmit mode (transmitter is operating).
RF Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 41
Note that antenna impedance affects radiated emissions, which must be
compared against the conducted 50-ohm emissions baseline. (AirPrime
embedded modules meet the 50-ohm conducted emissions requirement.)
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 self-
generated noise in the host device, over-the-air (OTA) or radiated testing is
required. This testing can be performed by Sierra Wireless or you can use your
own OTA test chamber for in-house testing.
Sierra Wireless’ sensitivity testing and
desensitization investigation
Although AirPrime embedded modules are designed to meet carrier requirements
for receiver performance, they are still susceptible to various performance
inhibitors.
As part of the Engineering Services package, Sierra Wireless offers modem OTA
sensitivity testing and desensitization (desense) investigation. For more
information, contact your account manager or the Sales Desk (see Contact
Information on page 4).
Note: Sierra Wireless has the capability to measure TIS (Total Isotropic Sensitivity) and
TRP (Total Radiated Power) according to CTIA's published test procedure.
Sensitivity vs. frequency
For CDMA bands, sensitivity is defined as the input power level in dBm that
produces a FER (Frame Error Rate) of 0.5%. Sensitivity should be measured at
all CDMA frequencies across each band.
For LTE bands, sensitivity is defined as the RF level at which throughput is 95% of
maximum.
Supported frequencies
The MC7750 supports:
•Single-band LTE — See Ta bl e 5-1 on page 42.
•Dual-band CDMA — See Ta ble 5-3 on page 42.
•GPS
•Radio transceiver requirements for 3GPP Release 7
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•Inter-RAT and inter-frequency cell reselection and handover between
supported frequency bands
Conducted Rx sensitivity / Tx power
Table 5-1: LTE frequency band support
Band Frequencies
Band 13 Tx: 777–787 MHz
Rx: 746–756 MHz
Table 5-2: LTE bandwidth support1
1. Table contents are derived from 3GPP TS 36.521-1 v9.4.1, table 5.4.2.1-1.
Band 1.4 MHz 3 MHz 5 MHz 10 MHz 15 MHz 20 MHz
Band 13 2
2. Bandwidth for which a relaxation of the specified UE receiver sensitivity requirement
(Clause 7.3 of 3GPP TS 36.521-1 v9.4.1) is allowed.
2
Table 5-3: CDMA frequency band support
Band Frequencies
PCS Tx: 1850–1910 MHz
Rx: 1930–1990 MHz
Cellular Tx: 824–849 MHz
Rx: 869–894 MHz
Table 5-4: Conducted Rx (Receive) sensitivity — LTE bands
LTE bands
Conducted Rx sensitivity (dBm)
Primary
(Typical) Secondary
(Typical) SIMO
(Typical) SIMO1
(Worst case)
LTE Band 13 Full RB
BW: 10 MHz2-97.03-96.53-100.03-93.3
1. Per 3GPP specification
2. Sensitivity values scale with bandwidth:
x_MHz_Sensitivity = 10 MHz_Sensitivity - 10*log(10 MHz/x_MHz)
3. Verizon Test Method
Table 5-5: Conducted Rx (Receive) sensitivity — CDMA bands
CDMA bands Conducted Rx sensitivity (dBm)
Typical Worst case
Cellular (800 MHz)
CDMA 1x
0.5% FER -108.0 -104.0
EVDO rev A
0.5% PER -110.0 -105.5
RF Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 43
GPS specifications
Note: For detailed electrical performance criteria, see Recommended GPS antenna speci-
fications on page 67.
PCS (1900 MHz)
CDMA 1x
0.5% FER -107.5 -104.0
EVDO rev A
0.5% PER -109.5 -105.5
Table 5-6: Conducted Tx (Transmit) power tolerances
Parameter Conducted
transmit power
(dBm)1
1. Preliminary values
Notes
LTE
LTE, Band 13 +23 dBm 1dB
CDMA
CDMA Band Class 0
(Cellular) +24 dBm 1dB
CDMA Band Class 1 (PCS) +23.5 dBm 1dB
(channel 1175)
+24 dBm 1dB
(other channels)
Table 5-7: GPS specifications 1
Parameter/feature Description
Satellite channels 12 channel, continuous tracking
Protocols NMEA 0183 V3.0
Acquisition time Hot start: 1 s
Warm start: 29 s
Cold start: 32 s
Accuracy Horizontal: < 2 m (50%); < 5 m (90%)
Altitude: < 4 m (50%); < 8 m (90%)
Velocity: < 0.2 m/s
Table 5-5: Conducted Rx (Receive) sensitivity — CDMA bands
CDMA bands Conducted Rx sensitivity (dBm)
Typical Worst case
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Sensitivity
Tracking2: -161 dBm
Acquisition3 (Assisted, non-LTE): -158 dBm
Acquisition (Assisted, LTE): -153 dBm
Acquisition (Standalone): -145 dBm
Operational limits Altitude <6000 m or velocity <100 m/s
(Either limit may be exceeded, but not both.)
1. All values are preliminary.
2. Tracking sensitivity is the lowest GPS signal level for which the device can still detect an
in-view satellite 98% of the time when in sequential tracking mode.
3. Acquisition sensitivity is the lowest GPS signal level for which the device can still detect
an in-view satellite 50% of the time.
Table 5-7: GPS specifications (Continued)1
Parameter/feature Description
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 45
6
6: Power
Power consumption
Note: All specifications in
these tables are prelim-
inary, based on chipset
published expectations.
Power consumption measurements in the tables below are for the
MC7750 Mini Card module connected to the host PC via USB.
The module does not have its own power source and depends on the
host device for power. For a description of input voltage
requirements, see Power supply on page 29.
Table 6-1: Averaged standby DC power consumption1
Signal Description Bands2Current3Notes /
configuration
Typ Max4Unit
VCC Standby current consumption (Sleep mode activated5)
LTE LTE Bands 5.5 8mA
CDMA EVDO CDMA bands 69.5 mA
Standby current consumption (Sleep mode deactivated5)
LTE LTE bands 55 65 mA
CDMA EVDO CDMA bands 58 65 mA
Low Power Mode (LPM) / Offline Mode (Sleep mode activated5)
RF disabled, but module is operational 2.5 3.0 mA
Low Power Mode (LPM) / Offline Mode (Sleep mode deactivated5)
RF disabled, but module is operational 67 80 mA
1. 3.3V supply voltage
2. For supported bands, see Table 5-1, LTE frequency band support, on page 42 and Table 5-3, CDMA frequency
band support, on page 42.
3. All measurements are preliminary.
4. Measured at 30ºC / nominal voltage.
5. Assumes USB bus is fully suspended during measurements
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Table 6-2: CDMA DC power consumption (+3.3V)
Description Bands Typ Max Units Notes / configuration
IS-2000 1X Data current PCS 366 -mA SO32, RC3 (Fwd) / RC3 (Rvs),
153.6 kbps (Fwd) / 76.8 kbps
(Rvs), CDG Urban Profile, USB
active
423 -mA SO32, RC3 (Fwd) / RC3 (Rvs),
153.6 kbps (Fwd) / 76.8 kbps
(Rvs), CDG Suburban Profile, USB
active
Cellular 327 -mA SO32, RC3 (Fwd) / RC3 (Rvs),
153.6 kbps (Fwd) / 76.8 kbps
(Rvs), CDG Urban Profile, USB
active
370 -mA SO32, RC3 (Fwd) / RC3 (Rvs),
153.6 kbps (Fwd) / 76.8 kbps
(Rvs), CDG Suburban Profile, USB
active
IS-856 1xEV-DO
Revision 0 Data current PCS 404 -mA CDG Urban Profile, USB active
475 -mA CDG Suburban Profile, USB active
Cellular 324 -mA CDG Urban Profile, USB active
377 -mA CDG Suburban Profile, USB active
IS-856A 1xEV-DO
Revision A Data current PCS 408 -mA CDG Urban Profile, USB active
479 -mA CDG Suburban Profile, USB active
Cellular 331 -mA CDG Urban Profile, USB active
386 -mA CDG Suburban Profile, USB active
Maximum peak current
– operational PCS or Cellular 1.2 AMax RF output power, full rate, full
operating temperature range.
Maximum peak current
– call connected 1.0 AMax RF output power, full rate, full
operating temperature range
Table 6-3: Averaged call mode DC power consumption (LTE)1
Signal Description Band2Current Notes / configuration
Max3Unit
VCC Data current consumption
(includes USB bus current)
LTE category 3 LTE bands 550 mA 100 / 50 Mbps — 0 dBm Tx power
1. All measurements are preliminary values
2. For supported bands, see Table 5-1, LTE frequency band support, on page 42 and Table 5-3, CDMA frequency
band support, on page 42.
3. Measured at 30ºC / nominal voltage.
Power
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 47
Module power states
The module has five power states, as described in Ta b l e 6-5.
Table 6-4: Miscellaneous DC power consumption1
Signal Description Current Unit Notes / configuration
Typ Max
VCC
Module OFF leakage
current 490 830 AFull operating temperature range
USB active current 18 25 mA High speed USB connection, CL = 50 pF
on D+ and D- signals
Inrush current 750 3000 mA
•Assumes power supply turn on time
> 100µs
•Dependent on host power supply
rise time.
GPS signal
connector Active bias on GPS port 3.3
(100 mA) VGPS connector 1 in Figure 5-1 on
page 37.
1. All measurements are preliminary values
Table 6-5: Module power states
State Details
Host is powered
Module is powered
USB interface active
RF enabled
Normal
(Default
state)
•Module is active
•Default state when VCC is first applied in the absence of W_DISABLE_N control
•Module is capable of placing / receiving calls, or establishing data connections on the
wireless network
•Current consumption is affected by several factors, including:
•Radio band being used
•Transmit power
•Receive gain settings
•Data rate
•Number of active Tx time slots
Low power
(‘Airplane
mode’)
•Module is active
•State is controlled by host interface using software commands:
•+CFUN=0 ([1] AT Command Set for User Equipment (UE) (Release 6)
(Doc# 3GPP TS 27.007)))
Sleep •Normal state of module between calls or data connections
•Module cycles between wake (polling the network) and sleep, at network provider-
determined interval.
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Power state transitions
The module uses state machines to monitor supply voltage and operating
temperature, and notifies the host when critical threshold limits are exceeded.
(See Tabl e 6-6 for trigger details and Figure 6-1 for state machine behavior.)
Power state transitions may occur:
•Automatically, when critical supply voltage or module temperature trigger
levels are encountered.
•Under host control, using available AT commands in response to user choices
(for example, opting to switch to airplane mode) or operating conditions.
Off •Host keeps module powered off by driving W_DISABLE_N low
•Module draws minimal current
•See W_DISABLE_N — Wireless disable on page 33 for more information.]
Disconnected •Host power source is disconnected from the module and all voltages associated with
the module are at 0 V.
Table 6-5: Module power states (Continued)
State Details
Host is powered
Module is powered
USB interface active
RF enabled
Table 6-6: Power state transitions (including voltage / temperature trigger levels)
Transition Voltage Temperature1
Notes
Trigger V2Trigger °C
Normal to Low Power VOLT_HI_CRIT 3.6 TEMP_LO_CRIT -25 •RF activity suspended
VOLT_LO_CRIT 2.9 TEMP_HI_CRIT 95
Low Power to Normal VOLT_HI_NORM 3.5 TEMP_NORM_LO -15
•RF activity resumed
Low Power to Normal
or
Remain in Normal
(Remove warnings)
VOLT_LO_NORM 3.1 TEMP_HI_NORM 80
Normal (Issue warning) VOLT_LO_WARN 3.0 TEMP_HI_WARN 85
Power off / on
(Host-initiated) ----
•Power off recommended when
supply voltage or module
operating temperature is critically
low or high.
1. Module-reported temperatures at the printed circuit board.
2. Supply voltage — 3.3V
Power
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 49
Figure 6-1: Voltage / temperature monitoring state machines
Power interface
Power ramp-up
On inital power up, inrush current depends on the power supply rise time — turn
on time >100 µs is required for < 3A inrush current.
The supply voltage must remain within specified tolerances while this is occurring.
Power-up timing
The unit is ready to enumerate with a USB host within a maximum of 3–5
seconds after power-up. Figure 6-2 on page 49 illustrates the power-up timing
sequence.
Figure 6-2: Power-up timing diagram
Note: Startup time is the time after power-up when the modem is ready to begin the
enumeration sequence.
Off mode
Handled by Power
State state machine.
Normal mode
Low power mode
Handled by Power
State state machine.
current_vcc > VOLT_LO_NORM
current_temp <= TEMP_HI_NORM current_vcc < VOLT_LO_CRIT
current_temp > TEMP_HI_CRIT
current_vcc > VOLT_LO_NORM
current_temp < TEMP_HI_NORM
current_vcc < VOLT_LO_WARN
current_temp > TEMP_HI_WARN
current_vcc < VOLT_HI_NORM
current_temp > TEMP_NORM_LO
current_vcc > VOLT_HI_CRIT
current_temp < TEMP_LO_CRIT
(Manual transition)
Host asserts
W_Disable#
Normal mode
Low supply voltage warning
or
High temperature warning
Enumeration
3.3V
W_Disable#
USB D+
Startup time
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Power supply noise
Noise in the power supply can lead to noise in the RF signal.
The power supply ripple limit for the module is no more than 200 mVp-p 1 Hz to
100 kHz. This limit includes voltage ripple due to transmitter burst activity.
Additional decoupling capacitors can be added to the main VCC line to filter noise
into the device.
SED (Smart Error Detection)
The module uses a form of SED to track premature modem resets.
•Module tracks consecutive resets occuring soon after power-on.
•After a sixth consecutive reset, the module waits in boot-and-hold mode for a
firmware download to resolve the power-cycle problem.
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7
7: Software Interface
Support tools
The MC7750 is compatible with the following support tools from
Sierra Wireless and authorized third parties:
•Firmware update utilities from Sierra Wireless
•Sierra Wireless Product Support Tool (SW-PST)
•CDMA Air Interface Tool (CAIT) from QUALCOMM
•QXDM from QUALCOMM
•QUALCOMM Product Support Tool (QPST)
USB interface
The device supports the Qualcomm QMI interface.
Please contact your Sierra Wireless account representative for QMI
interface documentation.
MTU size
The MTU (Maximum Transmission Unit) size is configured using a
driver installer command line option:
MTUSize=<value> (<value> is the size in bytes)
Verizon Wireless requires the MTU size to be 1428 bytes.
Example:
driverinstaller /MTUSize=1428
TCP window size (Windows XP)
The TCP window size for Windows XP is 128 kB (131072 bytes).
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8
8: Mechanical and Environmental Specifi-
cations
The MC7750 module complies with the mechanical and
environmental specifications in Ta b le 8-1. Final product conformance
to these specifications depends on the OEM device implementation.
Table 8-1: Mechanical and environmental specifications
Mode Details
Temperature Operational -30ºC to +60ºC – Full RF compliance
Non-operational -40ºC to +85ºC, 96 hours
(from MIL-STD 202 Method 108)
Relative humidity Non-operational 85ºC, 85% relative humidity for 48 hours
(non-condensing)
Vibration Non-operational Random vibration, 10 to 1000 Hz, nominal
6 G rms in each of three mutually perpendicular axes.
Test duration of 60 minutes for each axis, for a total test
time of three hours.
Shock Non-operational Half sine shock, 2 ms, 180 in/s (375 g).
Tested in each of three mutually perpendicular axes,
positive and negative (5 x 6, 30 bumps total).
Drop Non-operational 1 m on concrete on each of six faces, two times (module
only).
(Electrostatic discharge
(See Electrostatic
discharge (ESD) on
page 55.)
Operational The RF port (antenna launch and RF connector) complies
with the IEC 61000-4-2 standard:
•Electrostatic Discharge Immunity: Test: Level3
Contact Discharge: ±6 kV
Air Discharge: ±8 kV
Non-operational The host connector Interface complies with the following
standards only:
•+/- 1 kV Human Body Model (JESD22-A114-B)
•+/- 125 V Charged Device Model (JESD22-C101)
Thermal considerations See Thermal considerations on page 56.
Form factor PCI-Express Mini Card shielded with metal and metalized
fabric
Dimensions Length: 50.95 mm
Width: 30 mm
Thickness: 4.75 mm
Weight: Approximately 10 g
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Device views
Figure 8-1: Top and bottom views
Figure 8-2: Dimensioned view
Top view Bottom view
Top view Bottom view
Mechanical and Environmental Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 55
Labeling
Figure 8-3: Unit label
Note: The displayed label is an example only. The production label will vary by SKU.
The MC7750 label is non-removable and contains:
•Sierra Wireless logo and product name
•IMEI number in Code-128 barcode format
•SKU number (when required)
•Factory Serial Number (FSN) in alphanumeric format
•Manufacturing date code (incorporated into FSN)
•Licensed vendor logo
•Certification marks/details
Note: The MC7750 supports OEM partner-specific label requirements.
Electrostatic discharge (ESD)
The OEM is responsible for ensuring that the Mini Card host interface pins are not
exposed to ESD during handling or normal operation. (See Ta b le 8-1 on page 53
for specifications.)
ESD protection is highly recommended for the SIM connector at the point where
the contacts are exposed, and for any other signals from the host interface that
would be subjected to ESD by the user of the product. (The device includes ESD
protection on the antenna.)
FCC ID: N7Nxxxxxx
PRODUCT OF CHINA
FPPDDDYNNNNHH |||||||||||||||||||||||||||||||||||
BB
IMEI # 352678011234569
MC77XX
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Thermal considerations
Embedded modules can generate significant amounts of heat that must be
dissipated in the host device for safety and performance reasons.
Figure 8-4: Shield locations
The amount of thermal dissipation required depends on:
•Supply voltage — See Chapter 6: Power on page 45 for details of max power
dissipation for various operating modes.
•Usage — Typical power dissipation values depend on the location within the
host, amount of data transferred, etc.
Specific areas requiring heat dissipation are shown in Figure 8-4:
•Transmitter — Top face of module near RF connectors. Likely to be the hottest
area.
•Baseband 1 —Top face of module, below the transmitter.
•Receiver — Bottom face of module, behind the transmitter.
•Baseband 2 — Bottom face of module, behind Baseband 1.
To enhance heat dissipation:
•Maximize airflow over / around the module.
•Locate the module away from other hot components.
•If possible, use the mounting holes to attach (ground) the device to the main
PCB ground or a metal chassis.
Note: Adequate dissipation of heat is necessary to ensure that the module functions
properly, and to comply with the thermal requirements in [11] PCI Express Mini Card
Electromechanical Specification Revision 1.2.
Caution: Thermal putty is not recommended — incorrect application of the material could
require exessive pressure to be applied when seating the board, resulting in damage to the
board.
Transmitter
Baseband 1 Baseband 2
Receiver
Top Bottom
Pin 1
Pin 1
Mechanical and Environmental Specifications
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 57
Module integration testing
When testing your integration design:
•Test to your worst case operating environment conditions (temperature and
voltage)
•Test using worst case operation (transmitter on 100% duty cycle, maximum
power)
•Monitor temperature at all shield locations. Attach thermocouples to the areas
indicated in Figure 8-4 on page 56 (Transmitter, Baseband 1, Receiver,
Baseband 2).
Note: Make sure that your system design provides sufficient cooling for the module. RF
shield temperature should be kept below 90°C when integrated to prevent damage to the
module’s components.
(For acceptance, certification, quality, and production (including RF) test
suggestions, see Testing on page 71.)
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Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 59
9
9: Regulatory and Industry Approvals
This module is designed to and, upon commercial release, will be
certified to meet carrier requirements (e.g. Verizon Wireless).
Upon commercial release, the following regulatory approvals will
have been attained:
•FCC
•IC (Industry Canada)
Upon commercial release, the following industry approvals will have
been obtained:
•GCF-CC (may be obtained upon customer request)
Additional approvals may be obtained upon customer request —
contact your Sierra Wireless account representative for details.
Additional testing and certification may be required for the end
product with an embedded MC7750 modem and are the
responsibility of the OEM. Sierra Wireless offers professional
services-based assistance to OEMs with the testing and certification
process, if required.
Important notice
Because of 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. Although significant
delays or losses of data are rare when wireless devices such as the
Sierra Wireless modem are used in a normal manner with a well-
constructed network, the Sierra Wireless modem should not be used
in situations where failure to transmit or receive data could result in
damage of any kind to the user or any other party, including but not
limited to personal injury, death, or loss of property. Sierra Wireless
and its affiliates accept no responsibility for damages of any kind
resulting from delays or errors in data transmitted or received using
the Sierra Wireless modem, or for failure of the Sierra Wireless
modem to transmit or receive such data.
Safety and hazards
Do not operate your MC7750 modem:
•In areas where blasting is in progress
•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 inter-
ference. In such areas, the MC7750 modem MUST BE
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POWERED OFF. Otherwise, the MC7750 modem can transmit signals that
could interfere with this equipment.
In an aircraft, the MC7750 modem MUST BE POWERED OFF. Otherwise, the
MC7750 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.
Some airlines may permit the use of cellular phones while the aircraft is on the
ground and the door is open. The MC7750 modem may be used normally at this
time.
Important compliance information for
North American users
The MC7750 modem has been granted modular approval for mobile applications.
Integrators may use the modem in their final products without additional FCC / IC
(Industry Canada) certification if they meet the following conditions. Otherwise,
additional FCC / IC approvals must be obtained.
•Although the MC7750 modem has been granted module approval, there are
many conditions attached to this approval; final host integration will likely
require additional testing. Detailed guidelines are described in OEM device
classification process on page 61 to assist OEM module integrators in deter-
mining the extent of additional testing necessary to comply with FCC require-
ments.
•The end product with an embedded MC7750 modem must be evaluated for
simultaneous transmission requirements. See Simultaneous transmission
evaluation on page 62 for details.
•A user manual with the end product must clearly indicate the operating
requirements and conditions that must be observed to ensure compliance
with current FCC / IC RF exposure guidelines. See OEM product instruction
manual content on page 63 for details.
•To comply with FCC / IC regulations limiting both maximum RF output power
and human exposure to RF radiation, the maximum antenna gain including
cable loss in a mobile-only exposure condition must not exceed:
·Part 22 (Cellular): 7.3 dBi
·Part 24 (PCS): 3 dBi
·Part 27 (Band 13): 9 dBi
•A label must be affixed to the outside of the end product into which the
MC7750 modem is incorporated, with a statement similar to the following:
· This device contains FCC ID: N7NMC7750
This equipment contains equipment certified under IC: 2417C-MC7750
The end product with an embedded MC7750 modem may also need to pass the
FCC Part 15 unintentional emission testing requirements and be properly
authorized per FCC Part 15.
Regulatory and Industry Approvals
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 61
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.
OEM integration
Application of regulatory guidelines
Because ‘near-body’ devices (handhelds, laptops, tablets, scanners, etc.) vary
widely in design features, physical configurations, and use-models, module
integrators shall follow the guidelines below regarding device classification and
simultaneous transmission, and seek guidance from their preferred regulatory
test lab to determine how regulatory guidelines will impact the device compliance.
Proactive management of the regulatory process will minimize unexpected
schedule delays and costs due to unplanned testing activities.
Device classifications
The OEM integrator must determine the minimum distance required between their
device and the user’s body.
The FCC provides device classification definitions to assist in making the correct
determination. Note that these classifications are guidelines only; strict
adherence to a device classification may not satisfy the regulatory requirement as
near-body device design details may vary widely.
FCC definitions:
Portable: (§2.1093) — A portable device is defined as a transmitting device
designed to be used so that the radiating structure(s) of the device is / are
within 20 centimeters of the body of the user.
Mobile: (§2.1091) (b) — A mobile device is defined as a transmitting device
designed to be used in other than fixed locations and to generally be used in
such a way that a separation distance of at least 20 centimeters is normally
maintained between the transmitter’s radiating structure(s) and the body of
the user or nearby persons.
Per §2.1091d(d)(4) In some cases (for example, modular or desktop transmitters),
the potential conditions of use of a device may not allow easy classification of that
device as either Mobile or Portable. In these cases, applicants are responsible for
determining minimum distances for compliance for the intended use and
installation of the device based on evaluation of either specific absorption rate
(SAR), field strength, or power density, whichever is most appropriate.
OEM device classification process
The primary factor in determining whether a device will be classified as a Portable
product or as a Mobile product is antenna separation distance (body to radiating
antenna element).
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The review process between the OEM module integrator and the preferred
regulatory test lab is a crucial step in determining the appropriate device
classification, as it is impractical for Sierra Wireless to define all possible
combinations of design features, antennas, physical configurations, and use-
models.
1. Perform a device review with the preferred regulatory test lab to confirm
device classification.
2. Determine the Certification type (Standalone or C2PC from an existing
Modular Grant).
3. If the device classification is:
·Portable: Preferred regulatory test lab to determine if a PBA or KDB is
required.
·Mobile: Preferred regulatory test lab to determine if a PBA is required.
(Note: A PBA or KDB will likely be required for new technologies such as LTE
or WiMAX.)
4. If the device classification is Mobile, confirm the antenna does not violate the
Gain Limits specific to the module grant as specified in Important compliance
information for North American users on page 60.
5. Outline and execute a test plan with the preferred regulatory test lab.
Testing is likely to include some or all of Parts 15, 22, 24, 27, and either SAR
(for Portable devices) or MPE (for Mobile devices).
6. Follow product labeling requirements as described in Important compliance
information for North American users on page 60. (Ref §2.925)
7. Include the OEM product instruction manual content on page 63 boilerplate
text within the host product’s instruction manual.
Simultaneous transmission evaluation
The MC7750 modem has not been evaluated or approved for simultaneous
transmission as the number of possible multi-transmission scenarios for this
device is large. Any simultaneous transmission condition established through
module integration into a customer-specific product must be evaluated per the
requirements in KDB447498D01(8) and KDB616217D01,D03 (for laptop,
notebook, netbook, and tablet applications).
These requirements include, but are not limited to:
•Transmitters and modules certified for mobile or portable exposure conditions
can be incorporated in mobile host devices without further testing or certifi-
cation when:
·The closest separation among all simultaneous transmitting antennas is
20 cm,
or
·Antenna separation distance and MPE compliance requirements for All
simultaneous transmitting antennas have been specified in the application
filing of at least one of the certified transmitters within the host device. In
addition, when transmitters certified for portable use are incorporated in a
mobile host device, the antenna(s) must be 5 cm from all other simulta-
neous transmitting antennas.
Regulatory and Industry Approvals
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 63
•All antennas in the final product must be at least 20 cm from users and
nearby persons.
OEM product instruction manual content
Consistent with §2.909(a), the following text must be included within the user’s
manual or operator instruction guide for the final commercial product. (OEM-
specific content is displayed in italics.)
Operating Requirements and Conditions
The design of (Product Name) complies with U.S. Federal Communications Commission
(FCC) guidelines respecting safety levels of radio frequency (RF) exposure for (OEM to
insert device classification: Mobile or Portable) devices.
FCC ID: (Include Standalone FCC ID or Module FCC ID as required)
Note: Include the following RF Exposure statement for Mobile devices only.
RF Exposure - This device is only authorized for use in a mobile application. At least
20 cm (8 inches) of separation distance between the (Product Name) device and the user's
body must be maintained at all times.
Note: Include the following RF Exposure statement for Portable devices only.
RF Exposure - This device has been tested for compliance with FCC RF exposure limits
in a portable configuration. At least (Insert Required Separation Distance from RF
Exposure Evaluation) cm of separation distance between the (Product Name) device and
the user's body must be maintained at all times. This device must not be used with any
other antenna or transmitter that has not been approved to operate in conjunction with this
device.
Note: Always include the following Caution statement.
CAUTION: Any changes or modifications not expressly approved by (Company Name)
or Sierra Wireless could void the user’s authority to operate the equipment.
Note: Include the following statement if Part 15 of the FCC Rules is required. Integration
into host devices containing unlicensed devices may require additional comments in this
section. The OEM should confirm the extent of their user’s guide content with their
preferred regulatory test lab.
Note: This equipment has been tested and found to comply with the limits for a (OEM to
insert device type: Class A or Class B) digital device, pursuant to Part 15 of the FCC
Rules. (OEM must follow Part 15 guidelines (§15.105 and §15.19) to determine
additional statements required in this section for their device class)
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A
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 65
A: Antenna Specification
This appendix describes recommended electrical performance
criteria for main path, diversity path, and GPS antennas used with
AirPrime embedded modules.
The performance specifications described in this section are valid
while antennas are mounted in the host device with antenna feed
cables routed in their final application configuration.
Note: Antennas should be designed before the industrial design is finished
to make sure that the best antennas can be developed.
Table A-1: Antenna requirements a
Parameter Requirements Comments
Antenna system External multi-band 2x2 MIMO
antenna system (Ant1 / Ant2)bIf Ant2 includes GPS, then it must also satisfy
requirements in Table A-2 on page 67.
Operating bands of Ant1
and Ant2c700–960 MHz
1710–1990 MHz
2110–2170 MHz
2500–2700 MHz
VSWR of Ant1 and Ant2 1:1 (ideal)
< 2.5:1 (recommended) On all bands including band edges
Total radiated efficiency of
Ant1 and Ant2 > 50% on all bands •Measured at the RF connector.
•Includes mismatch losses, losses in the
matching circuit, and antenna losses,
excluding cable loss.
•Sierra Wireless recommends using
antenna efficiency as the primary
parameter for evaluating the antenna
system.
Peak gain is not a good indication of
antenna performance when integrated
with a host device (the antenna does not
provide omni-directional gain patterns).
Peak gain can be affected by antenna
size, location, design type, etc. — the
antenna gain patterns remain fixed unless
one or more of these parameters change.
Radiation patterns of Ant1
and Ant2 Nominally Omni-directional
radiation pattern in azimuth plane.
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Envelope correlation
coefficient between Ant1
and Ant2
< 0.4 on 730–960 MHz band
< 0.3 on 1800–1990 MHz and
2110–2170 MHz bands
< 0.2 on 2600–2700 MHz band
Mean Effective Gain of
Ant1 and Ant2 (MEG1,
MEG2)
-3 dBi
Ant1 and Ant2 Mean
Effective Gain Imbalance I
MEG1 / MEG2 I
< 2 dB for MIMO operation
< 6 dB for diversity operation
Maximum antenna gain Must not exceed antenna gains
due to RF exposure and ERP /
EIRP limits, as listed in the
module’s FCC grant.
See Important compliance information for
North American users on page 60.
Isolation between Ant1 and
Ant2 (S21) > 10 dB •If antennas can be moved, test all
positions for both antennas.
•Make sure all other wireless devices
(Bluetooth or WLAN antennas, etc.) are
turned OFF to avoid interference.
Power handling •> 2 W RF power on low bands
•> 1 W on high bands
•Measure power endurance over 4 hours
(estimated talk time) using a 2 W CW
signal — set the CW test signal frequency
to the middle of the PCS Tx band
(1880 MHz for PCS).
•Visually inspect device to ensure there is
no damage to the antenna structure and
matching components.
•VSWR / TIS / TRP measurements taken
before and after this test must show
similar results.
a. These worst-case VSWR figures for the transmitter bands may not guarantee RSE levels to be within regulatory limits. The
device alone meets all regulatory emissions limits when tested into a cabled (conducted) 50 ohm system. With antenna
designs with up to 2.5:1 VSWR or worse, the radiated emissions could exceed limits. The antenna system may need to be
tuned in order to meet the RSE limits as the complex match between the module and antenna can cause unwanted levels of
emissions. Tuning may include antenna pattern changes, pahse/delay adjustment, passive component matching. Examples of
the application test limits would be included in FCC Part 22 and Part 24, test case 12.2.1 for GSM (3GPP TS 51.010), and test
case 4.2.2 for WCDMA (ETSI EN 301 511).
b. Ant1 — Primary, Ant2 — Secondary (Diversity / MIMO / GPS connector 2)
c. Stated band ranges satisfy requirements for both Ant1 and Ant2.
Table A-1: Antenna requirements (Continued)a
Parameter Requirements Comments
Antenna Specification
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 67
Recommended GPS antenna
specifications
Antenna tests
The following guidelines apply to the requirements described in Tabl e A-1 on
page 65 and Ta bl e A-2 on page 67:
•Perform electrical measurements at room temperature (+20°C to +26°C)
unless otherwise specified
•For main and diversity path antennas, make sure the antennas (including
contact device, coaxial cable, connectors, and matching circuit with no more
than six components, if required) have nominal impedances of 50 across
supported frequency bands.
•All tests (except isolation / correlation coefficient) —Test the main or diversity
antenna with the other antenna terminated.
Table A-2: GPS standalone antenna requirements
Parameter Requirements Comments
Frequency range •1575.42 MHz ±2 MHz
minimum
•1565–1606 MHz recom-
mended
Field of view (FOV) •Omni-directional in azimuth
•-45° to +90° in elevation
Polarization
(average Gv/Gh) > 0 dB Vertical linear polarization is
sufficient.
Free space average gain
(Gv+Gh) over FOV > -6 dBi (preferably > -3 dBi) Gv and Gh are measured and
averaged over -45° to +90° in
elevation, and 180° in azimuth.
Gain •Maximum gain and uniform
coverage in the high elevation
angle and zenith.
•Gain in azimuth plane is not
desired.
Average 3D gain > -5 dBi
Isolation between GPS and
Ant1 > 10 dB in all uplink bands
Typical VSWR < 2.5:1
Polarization Any other than LHCP (left-hand
circular polarized) is acceptable.
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•Any metallic part of the antenna system that is exposed to the outside
environment needs to meet the electrostatic discharge tests per IEC61000-4-
2 (conducted discharge +8kV).
•The functional requirements of the antenna system are tested and verified
while the embedded module’s antenna is integrated in the host device.
Note: Additional testing, including active performance tests, mechanical, and accelerated
life tests can be discussed with Sierra Wireless’ engineering services. Contact your Sierra
Wireless representative for assistance.
B
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B: Design Checklist
This chapter provides a summary of the design considerations
mentioned throughout this guide. This includes items relating to the
power interface, RF integration, thermal considerations, cabling
issues, and so on.
Note: This is NOT an exhaustive list of design considerations. It is expected
that you will employ good design practices and engineering principles in your
integration.
Table B-1: Hardware integration design considerations
Suggestion Section where discussed
Component placement
Protect the SIM socket so the SIM cannot be removed while the
host is powered up.
SIM implementation on
page 32
If an ESD suppressor is not used, allow space on the SIM
connector for series resistors in layout. (Up to 100 may be
used depending on ESD testing requirements).
SIM implementation on
page 32
Minimize RF cable losses as these affect performance values
listed in product specification documents.
RF connections on page 37
Antennas
Match the module / antenna coax connections to 50 —
mismatched antenna impedance and cable loss negatively
affect RF performance.
RF connections on page 37
If installing CDMA and UMTS modules in the same device,
consider using separate antennas for maximum performance.
Antenna and cabling on
page 38
Power
Make sure the power supply can handle the maximum current
specified for the module type.
Power consumption on
page 45
Limit the total impedance of VCC and GND connections to the
SIM at the connector to less than 1 (including any trace
impedance and lumped element components — inductors, filters,
etc.). All other lines must have a trace impedance less than 2 .
SIM implementation on
page 32
Decouple the VCC line close to the SIM socket. The longer the
trace length (impedance) from socket to module, the greater the
capacitance requirement to meet compliance tests.
SIM implementation on
page 32
EMI / ESD
Investigate sources of localized interference early in the design
cycle.
Methods to mitigate decreased
Rx performance on page 40
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Provide ESD protection for the SIM connector at the exposed
contact point (in particular, the CLK, VCC, IO, and RESET lines).
SIM implementation on
page 32
Keep very low capacitance traces on the USIM_DATA and
USIM_CLK signals.
SIM implementation on
page 32
To minimize noise leakage, establish a very good ground
connection between the module and host.
Ground connection on page 39
Route cables away from noise sources (for example, power
supplies, LCD assemblies, etc.).
Methods to mitigate decreased
Rx performance on page 40
Shield high RF-emitting components of the host device (for
example, main processor, parallel bus, etc.).
Methods to mitigate decreased
Rx performance on page 40
Use discrete filtering on low frequency lines to filter out unwanted
high-order harmonic energy.
Methods to mitigate decreased
Rx performance on page 40
Use multi-layer PCBs to form shielding layers around high-speed
clock traces.
Methods to mitigate decreased
Rx performance on page 40
Thermal
Test to worst case operating conditions — temperature, voltage,
and operation mode (transmitter on 100% duty cycle, maximum
power).
Thermal considerations on
page 56
Use appropriate techniques to reduce module temperatures (for
example, airflow, heat sinks, heat-relief tape, module placement,
etc.).
Thermal considerations on
page 56
Host / Modem communication
Make sure the host USB driver supports remote wakeup,
resume, and suspend operations, and serial port emulation.
[5] AirCard / AirPrime USB
Driver Developer’s Guide
(Doc# 2130634)
When no valid data is being sent, do not send SOF tokens from
the host (causes unnecessary power consumption).
[5] AirCard / AirPrime USB
Driver Developer’s Guide
(Doc# 2130634)
Table B-1: Hardware integration design considerations (Continued)
Suggestion Section where discussed
C
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C: Testing
Note: All AirPrime embedded modules are factory-tested to ensure they
conform to published product specifications.
Developers of OEM devices integrating Sierra Wireless AirPrime
embedded modules should include a series of test phases in their
manufacturing process to make sure that their devices work properly
with the embedded modules.
Suggested phases include:
•Acceptance testing — Testing of modules when they are received
from Sierra Wireless
•Certification testing — Testing of completed devices to obtain
required certifications before beginning mass production
•Production testing — Testing of completed devices with the
modules embedded
•Quality assurance testing — Post-production
AT command entry timing
requirement
Some AT commands require time to process before additional
commands are entered. For example, the modem will return “OK”
when it receives AT!DAFTMACT. However, if AT!DASBAND is received
too soon after this, the modem will return an error.
When building automated test scripts, ensure that sufficient delays
are embedded where necessary to avoid these errors.
Acceptance testing
Note: Acceptance testing is typically performed for each shipment received.
When you receive a shipment from Sierra Wireless, you should make
sure it is suitable before beginning production.
From a random sampling of units, test that:
•Units are operational
•Units are loaded with the correct firmware version
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Acceptance test requirements
To perform the suggested tests, you require a test system in which to temporarily
install the module, and you must be able to observe the test device’s LED
indicator.
Acceptance test procedure
The following is a suggested acceptance testing procedure using Sierra Wireless’
Watcher™ software:
Note: You can perform
these tests using appro-
priate AT commands.
Test 1: Check power-up and initialization
1. After installing the module, start the test system.
2. Launch Watcher.
3. Check the LED — If the LED is off, there is a problem with the module or with
the connection to the LED.
Test 2: Check version numbers
1. From Watcher, select Help > About.
2. Verify that the firmware version in the About window is correct.
3. Close the About window.
If the module fails either of these tests, or is not recognized by Watcher:
1. Replace the module with one that is known to work correctly and repeat the
tests.
2. If the tests are successful, reinstall the original module and repeat the tests.
If the module still does not work correctly, contact your account manager.
Certification testing
Note: Typically, certification testing of your device with the integrated module is required
one time only.
The AirPrime embedded module has been certified as described in Regulatory
and Industry Approvals on page 59.
When you produce a host device with a Sierra Wireless AirPrime embedded
module, you must obtain certifications for the final product from appropriate
regulatory bodies in the jurisdictions where it will be distributed.
The following are some of the regulatory bodies from which you may require
certification — it is your responsibility to make sure that you obtain all necessary
certifications for your product from these or other groups:
•FCC (Federal Communications Commission — www.fcc.gov)
•Industry Canada (www.ic.gc.ca)
•CSA (Canadian Standards Association — www.csa.ca)
Testing
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 73
•Factory Mutual (FM Global — www.allendale.com)
•Underwriters Laboratories Inc. (www.ul.com)
•CDG (CDMA Development Group — www.cdg.org)
•GCF (Global Certification Forum — www.globalcertificationforum.org) outside
of North America
•PTCRB (PCS Type Certification Review Board — www.ptcrb.com) in North
America
Production testing
Note: Production testing typically continues for the life of the product.
Production testing ensures that, for each assembled device, the module is
installed correctly (I / O signals are passed between the host and module), and the
antenna is connected and performing to specifications (RF tests).
Typical items to test include:
•Host connectivity
•Baseband (GPIO, host / module connectors)
•RF assembly (Tx and / or Rx, as appropriate)
•Network availability
•Host / device configuration issues
Note: The amount and types of tests to perform are your decision — the tests listed in this
section are guidelines only. Make sure that the tests you perform exercise functionality to
the degree that your situation requires.
Use an appropriate test station for your testing environment (see Acceptance test
requirements on page 72 for suggestions) and use AT commands to control the
integrated module.
Note: Your test location must be protected from ESD to avoid interference with the module
and antenna(s), assuming that your test computer is in a disassembled state.
Also, consider using an RF shielding box — local government regulations may prohibit
unauthorized transmissions.
Functional production test
This section presents a suggested procedure for performing a basic manual
functional test on a laboratory bench using an AirPrime embedded module and a
Mini Card Dev Kit. When you have become familiar with the testing method, use it
to develop your own automated production testing procedures.
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Suggested production tests
Consider the following tests when you design your production test procedures for
devices with the AirPrime module installed.
•Visual check of the module’s connectors and RF assemblies
•Module is operational
•USB connection is functional
•LED is functional
•W_DISABLE_N (module power down)
•Firmware revision check
•Rx tests on main and auxiliary paths
•Tx test
Production test procedure
The following is a suggested test plan — you must decide which tests are
appropriate for your product. You may wish to add additional tests that more fully
exercise the capabilities of your product.
Using an appropriate Dev Kit-based test station, and referring to the appropriate
AT command references:
1. Visually inspect the module’s connectors and RF assemblies for obvious
defects before installing it in the test station.
2. Ensure that the module is turned off before beginning your tests — Drive
W_DISABLE_N low.
3. If using Linux, determine if any USB devices are currently connected to the
computer:
a. Open a shell window and enter the command ls / dev / tty / USB*.
b. Record the ttyUSBn values that are returned; these are the currently
connected USB devices. If the command returns “no such file or
directory”, there are no devices currently connected.
4. Tes t W_DISABLE_N — Turn on the module by letting W_DISABLE_N float
(high impedance).
5. Test USB functionality — Check for USB enumeration.
·(Windows systems) The Device Manager shows Sierra Wireless items
under Ports (COM & LPT). The devices shown depend on the module type.
For example:]
·(Linux systems) Enter the command ls / dev / tty / USB* and then record and
compare the results with those from Step 3. If there are any new ttyUSBn
devices, then the modem has enumerated successfully. (There should be
seven new devices) For example:
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·With one other USB device already connected and assigned to
ttyUSB1:
(Note: The AT port is the fourth new device — / dev / ttyUSB4.)
6. Make sure your modem is connected and running, and then establish contact
with the module:
·Windows systems: Use a terminal emulation / communications program
such as Microsoft HyperTerminal® to connect over the COM port reserved
for AT commands (see listings in Step 5):
a. Start HyperTerminal.
b. Select File > Connection Description. The Connection Description dialog
box appears.
i. Typ e Sierra in the Name box and click OK. The Connect To dialog box
appears.
ii. Click OK without changing any of the displayed information. The
Connect dialog box appears.
iii. Click Cancel.
Note: If necessary, use
AT E1
to enable echo.
iv. Typ e ATZ in the HyperTerminal window. If the connection is
established, the message OK appears.
·Linux systems: Use a terminal emulation / communications program such
as minicom to connect over the device handle for AT commands (see
listings in Step 5):
Note: If the command
“minicom” is not found,
then use a different
program, or download
minicom and repeat this
step. See Downloading
and configuring minicom
for Linux systems on
page 76 for details.
i. Start minicom:
·First use of the modem: From the command line, type
minicom -s. (The ‘-s’ switch shows the configuration menu.)
·Subsequent uses: From the command line, type minicom. (The
‘-s’ switch is assumed.)
The minicom configuration details appear and the message OK
appears when the connection is established.
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7. Display the firmware version:
·AT!GVER
8. Test the LED — Set the LED in blinking mode using this command, then
visually verify that the LED turns off and on:
·AT!LEDCTRL
9. Unlock the extended AT command set:
·AT!ENTERCND
10. Put the module in diagnostic / factory test mode:
·AT!DAFTMACT
11. Communicate with the SIM using +CPIN or +CIMI.
When performing RF tests, use a test platform as described in Suggested
testing equipment on page 81.
12. Test RF transmission, if desired:
·(LTE) To test the LTE transmission path, use a call box.
13. Test RF reception, if desired:
·(CDMA) See Testing CDMA RF Receive path on page 77.
·(LTE) See LTE RF receive path test on page 78.
14. Test standalone GPS functionality — See GPS standalone connector test on
page 80.
15. Drive W_DISABLE_N low and confirm that the module powers down:
·Windows systems — The Sierra Wireless items under the Ports (COM &
LPT) entry in Device Manager disappear as the module powers off.
·Linux systems — Enter the command ls / dev / tty / USB*. The devices
enumerated in Step 5 will not appear after the module powers off.
Downloading and configuring minicom for Linux systems
Note: This procedure is for Ubuntu systems. If you are using a different Linux distribution,
use the appropriate commands for your system to download minicom.
To download and configure minicom in a Ubuntu system:
Note: To install minicom,
you must have root
access, or be included in
the sudoers list.
1. Download and install minicom — enter the following command:
sudo apt-get install minicom
2. When prompted, enter your user password to begin the download and instal-
lation. When minicom is installed, the shell prompt appears.
3. Configure minicom to communicate with your modem:
a. Start minicom with the following command:
minicom -s
4. Use the down-arrow key to select the Serial port setup option.
5. Refer to Step 5 on page 74 to identify the device file handle ( / dev / ttyUSBn)
used for AT commands.
6. Indicate the file handle to use for AT commands — Enter A and then replace
the serial device string with the AT file handle (for example, / dev / ttyUSB4 as
shown in the example in Step 5 on page 74).
7. Press Enter twice.
Testing
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8. Use the down-arrow key to select Save setup as dfl.
9. Select Exit.
Testing CDMA RF Receive path
Note: This procedure segment is performed in Step 13 of the Production test procedure on
page 74.
To test the DUT’s receive path:
Note: This procedure
describes steps using the
Agilent 8648C signal
generator — the Rohde &
Schwarz SML03 is shown
for reference only.
1. Set up the signal generator:
Note: This example setup
uses a 200 kHz offset from
band center for testing
using a continuous wave —
you can use any appro-
priate baseband frequency
offset (for example,
100 kHz, 300 kHz, etc.).
If using a modulated
signal, set the frequency to
band center with no offset.
a. Press the Frequency button to set the frequency to 1960.200 MHz for PCS
band, Channel 600, or 881.720 MHz for Cellular band, Channel 384
b. Press the Amplitude button to set the amplitude to -55.0 dBm.
c. Press the RF ON / OFF button to enable or disable the RF port of the signal
generator.
2. Read back the power level from the main receiver:
a. AT!ENTERCND (Unlock the extended AT command set.)
b. AT!DAFTMACT (Enter test mode.)
c. AT!CHAN=600,1 (PCS band, channel 600)
or
AT!CHAN=384,0 (Cellular band, channel 384)
d. AT!RX=1 (Turn on the main receiver.)
e. AT!RXAGC? (Read back the power level, in dBm, from the main receiver.)
Response examples:
·RXAGC = 0xFFFFFF33 = -77 dBm (Signal generator’s RF port is
OFF)
·RXAGC = 0x0021 = -60 dBm typical (Signal generator’s RF port is
ON)
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Note: The dBm value displayed is calculated to reflect the power at the input connector.
f. AT!RX2=1 (Turn on diversity receiver.)
g. AT!RX2AGC? (Read back the power level, in dBm, from the diversity
receiver.)
Response examples:
·RX2AGC = 0xFFFFFF76 = -84 dBm (Signal generator’s RF port is
OFF)
·RX2AGC = 0xFFFFFFC6 = -69 dBm typical (Signal generator’s RF
port is ON)
h. AT!RX=0 (Turn off main receiver.)
i. AT!RX2=0 (Turn off diversity receiver.)
3. Test limits — Run ten or more good DUTs through this test procedure to
obtain a nominal received power value.
·Apply a tolerance of 5 to 6 dB to each measurement (assuming a good
setup design).
·Make sure the measurement is made at a high enough level that it is not
influenced by DUT-generated and ambient noise.
·The Signal Generator power level should be at least -50 dBm.
·Monitor these limits during mass-production ramp-up to determine if further
adjustments are needed.
Note: The value measured by the DUT depends on the test setup and DUT design. Host
RF cabling loss, antenna efficiency and pattern, test antenna efficiency and pattern, and
choice of shield box all significantly influence the measurement.
Note: When doing the same test over the air in an RF chamber, values are likely to be
significantly lower.
LTE RF receive path test
Note: This procedure segment is performed in Step 13 of the Production test procedure on
page 74.
Tab l e C-1 contains parameters used in the suggested test procedure that follows.
Table C-1: Test settings — Receive path
Mode Test category Bands
B13 B17 B4
LTE
Frequencya (MHz) 753.0 742.0 2134.5
Band 36 37 42
Channelb23230 23790 20175
Testing
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To test the DUT’s receive path (or diversity path, while connected to the diversity
antenna):
Note: This procedure
describes steps using the
Agilent 8648C signal
generator — the Rohde &
Schwarz SML03 is shown
for reference only.
1. Set up the signal generator:
a. Set the amplitude to -70 dBm
b. Set the frequency for the band being tested. See Ta bl e C-1 for frequency
values.
2. Set up the DUT:
a. AT!ENTERCND (Unlock extended AT command set.)
b. AT!DAFTMACT (Put modem into factory test mode.)
c. AT!DASBAND=<band> (Set frequency band.)
·See Ta b l e C-1 on page 78 for <band> values
d. AT!DASCHAN=<channel> (Set modem channel)
·See Ta b l e C-1 on page 78 for <channel> values
e. AT!DALGAVGAGC=<channel>,0 (Get averaged Rx AGC)
·See Ta b l e C-1 on page 78 for <channel> values
3. Test limits — Run ten or more good DUTs through this test procedure to
obtain a nominal received power value.
·Apply a tolerance of 5 to 6 dB to each measurement (assuming a good
setup design).
·Make sure the measurement is made at a high enough level that it is not
influenced by DUT-generated and ambient noise.
·The Signal Generator power level can be adjusted and new limits found if
the radiated test needs greater signal strength.
·Monitor these limits during mass-production ramp-up to determine if further
adjustments are needed.
a. All values offset from actual center channel by +2 MHz
b. Channel values shown are at the center of the corresponding bands.
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Note: The value measured from the DUT is significantly influenced by the test setup and
DUT design (host RF cabling loss, antenna efficiency and pattern, test antenna efficiency
and pattern, and choice of shield box).
GPS standalone connector test
GPS testing should be done on devices that support a dedicated GPS connector.
If the MC7750 supports a dedicated GPS connector/path (that is, not shared with
the diversity connector), then GPS testing may be done by characterizing some
known-good MC devices and checking for carrier to noise levels.
To test the GPS path:
1. Inject a carrier signal at -110dBm, frequency 1575.52 MHz into the GPS Rx
path. (Note that this is 100kHz higher than the actual GPS frequency.)
2. Test the signal carrier-to-noise level at the GPS receiver:
a. AT!ENTERCND (Unlock extended AT command set.)
b. AT!DAFTMACT (Put modem into factory test mode.)
c. AT!DACGPSTESTMODE=1 (Start CGPS diagnostic task.)
d. AT!DACGPSSTANDALONE=1 (Enter standalone RF mode.)
e. AT!DACGPSMASKON (Enable log mask.)
f. AT!DACGPSCTON (Return signal-to-noise and frequency measurements.)
g. Repeat AT!DACGPSCTON five to ten times to ensure the measurements
are repeatable and stable.
3. Leave the RF connection to the Mini Card device intact, and turn off the
signal generator.
4. Take several more !DACGPSCTON readings. This will demonstrate a 'bad'
signal in order to set limits for testing, if needed. This frequency offset should
fall outside of the guidelines in the note below, which indicates that the CtoN
result is invalid.
5. (Optional) Turn the signal generator on again, and reduce the level to -
120dBm. Take more !DACGPSCTON readings and use these as a reference
for what a marginal / poor signal would be.
Note: The response to AT!DACGPSCTON for a good connection should show CtoN within
58 +/- 5dB and Freq (frequency offset) within 100000 Hz +/- 5000 Hz .
Quality assurance testing
Note: QA is an ongoing
process based on random
samples from a finished
batch of devices.
The quality assurance tests that you perform on your finished products should be
designed to verify the performance and quality of your devices.
The following are some testing suggestions that can confirm that the antenna is
interfaced properly, and that the RF module is calibrated and performs to
specifications:
•Module registration on cellular networks
Testing
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•Power consumption
•Originate and terminate data and voice (if applicable) calls
•Cell hand-off
•Transmitter and receiver tests
•FER (Frame Error Rate) as an indicator of receiver sensitivity / performance
•Channel and average power measurements to verify that the device is trans-
mitting within product specifications
•RF sensitivity tests
•CDMA:
·FER testing — Test receiver sensitivity for conditions of minimum cell power.
FER can be measured for the specified receiver sensitivity of -104 dBm.
The objective of this test is to determine if the FER measured is within the
acceptable limits for the specified receiver sensitivity of the module. Unlike
the FER tests performed during production testing, this test determines the
receiver performance without the influence of the noise factor (AWGN), but
with extremely low cell power. The reported FER and the confidence level
must be <1% and >95% respectively for the test to be considered a pass.
Suggested testing equipment
To perform production and post-production tests, you will require appropriate
testing equipment. A test computer can be used to coordinate testing between the
integrated module (on the development kit or host) and the measurement
equipment, usually with GPIB connections. The suggested setup includes a
power meter to test RF output power and a signal generator to evaluate the
receiver.
Testing assistance provided by Sierra
Wireless
Extended AT commands have been implemented to assist with performing FTA
GCF tests and portions of CE Mark tests requiring radio module access. These
are documented in the [2] AirCard / AirPrime UMTS Devices Supported AT
Command Reference (Doc# 2130617) and [3] AirPrime MC8xxx Embedded
Modules Extended AT Command Reference (Doc# 2130616).
Sierra Wireless offers optional professional services based assistance to OEMs
with regulatory approvals.
IOT/Operator testing
Interoperability and Operator/Carrier testing of the finished system is the
responsibility of the OEM. The test process will be determined with the chosen
network operator(s) and will be dependent upon your business relationship with
them, as well as the product's application and sales channel strategy.
Sierra Wireless offers assistance to OEMs with the testing process, if required.
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Extended AT commands for testing
Sierra Wireless provides proprietary AT commands that may help in hardware
integration design and testing (these commands are NOT intended for use by end
users):
•[3] AirPrime MC8xxx Embedded Modules Extended AT Command Reference
(Doc# 2130616)
•[2] AirCard / AirPrime UMTS Devices Supported AT Command Reference
(Doc# 2130617)
Some useful commands from these documents for use in hardware integration
are listed in Tabl e C-2 on page 82.
Table C-2: Extended AT commands
Command Description
Password commands
!ENTERCND Enable access to password-protected commands
!SETCND Set AT command password
Modem reset and status commands
!GRESET Reset the modem
!GSTATUS Return the operation status of the modem (mode, band,
channel, and so on)
Diagnostic commands
!BAND Select a set of frequency bands or reports current selection
!GBAND Read / set the current operating band
Test commands
!ALLUP Turn transmitter on / off and simulate ‘All UPs’
!CHAN Tune synthesizer to channel / band
!DAFTMACT Put the modem into FTM (Factory Test Mode)
!DAFTMDEACT Put the modem into online mode
!DAGGRSSI Return the RSSI (Received Signal Strength Indicator) in
dBm (GSM mode)
!DAGGAVGRSSI Return an averaged RSSI (Received Signal Strength
Indicator) in dBm (GSM mode)
!DAGGRSSIRAW Return the raw RSSI (GSM mode)
!DAGINFO Return GSM mode RF information
!DAGSLOCK Return the RF synthesizer lock state
!DAGSRXBURST Set the GSM receiver to burst mode
!DAGSRXCONT Set the GSM receiver continually on
Testing
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!DAGSTXBURST Set the GSM transmitter to burst mode
!DAGSTXFRAME Set the GSM Tx frame structure
!DALGAVGAGC Return averaged Rx AGC value (LTE)
!DALGRXAGC Return Rx AGC value (LTE)
!DALGTXAGC Return Tx AGC value and transmitter parameters (LTE)
!DAOFFLINE Place modem offline
!DASBAND Set the frequency band (UMTS / GSM)
!DASCHAN Set the modem channel (frequency) (UMTS / GSM)
!DASLNAGAIN Set the LNA (Low Noise Amplifier) gain state
!DASPDM Set the PDM (Pulse Duration Modulation) value
!DASTXOFF Turn off the Tx PA (Power Amplifier)
!DASTXON Turn on the Tx PA (Power Amplifier)
!DAWGAVGAGC Return averaged RX AGC value (WCDMA)
!DAWGRXAGC Return the Rx AGC (Automatic Gain Control) value (UMTS)
!DAWINFO Return WCDMA mode RF information
!DAWSCONFIGRX Set the UMTS receiver to factory calibration settings
!DAWSPARANGE Set the PA range state machine (UMTS)
!DAWSCHAINTCM Place receive chain in test call mode (WCDMA)
!DAWSSCHAIN Enable secondary receive chain (WCDMA)
!DAWSTXCW Set the waveform used by the transmitter (UMTS)
!DAWSTXPWR Set desired Tx power level (WCDMA)
!IMSTESTMODE Enable / disable IMS test mode
!KEYOFF Key off the transmitter
!KEYON Key on the transmitter
!OSDSM Display memory usage for DSM (Distributed Shared
Memory) buffer pools
$QCAGC Read Rx AGC (CDMA / WCDMA)
!RX2 Turn second receiver on / off
!RX2AGC Read second receiver Rx AGC
!RXAGC Read first receiver Rx AGC
Table C-2: Extended AT commands (Continued)
Command Description
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!TX Turn transmitter on / off
!TXAGC Set desired Tx AGC
Table C-2: Extended AT commands (Continued)
Command Description
D
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D: Packaging
Sierra Wireless AirPrime Mini Cards are shipped in sealed boxes.
The standard packaging (see Figure 4-1), contains a single tray with
a capacity of 100 modules . (Note that some SKUs may have custom
packaging — contact Sierra Wireless for SKU-specific details.)
In the standard packaging, Mini Cards are inserted, system
connector first, into the bottom portion (T1) of a two-part tray. all
facing the same direction. This allows the top edge of each Mini Card
to contact the top of the triangular features in the top portion (T2) of
the tray (see Detail A).
The top and bottom portions of the tray snap together at the four
connection points.
Figure 4-1: Device placement in module tray
The tray is placed in a manufacturing box (T2 at the top), sealed with
a security tape (P1), and a manufacturing label is placed on the
bottom-right corner, above the security tape. (See Figure 4-2.)
Figure 4-2: Shipping package
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E
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E: References
This guide deals specifically with hardware integration issues that are
unique to AirPrime embedded modules.
Web site support
For additional documents describing embedded module design,
usage, and integration issues (AT command references, integration
guides, etc.), visit www.sierrawireless.com/minicard. To obtain access
permission, contact your Sierra Wireless account representative.
Sierra Wireless documents
The following Sierra Wireless documents are available from
www.sierrawireless.com.
Command documents
[1] AT Command Set for User Equipment (UE) (Release 6)
(Doc# 3GPP TS 27.007)
[2] AirCard / AirPrime UMTS Devices Supported AT Command
Reference (Doc# 2130617)
[3] AirPrime MC8xxx Embedded Modules Extended AT Command
Reference (Doc# 2130616)
Other Sierra documents
[4] PCI Express Mini Card Dev Kit Quick Start Guide
(Doc# 2130705)
[5] AirCard / AirPrime USB Driver Developer’s Guide (Doc# 2130634)
Industry / other documents
The following non-Sierra Wireless references are not included in your
documentation package:
[6] CDMA 1x Standard (CDMA 200 Series Release A (2000))
(Doc# TIA/EIA/IS-2000 Series, Release A)
[7] FCC Regulations - Part 15 - Radio Frequency Devices
[8] IEC-61000-4-2 level 3
[9] IEC-61000-4-2 level (Electrostatic Discharge Immunity Test)
[10]Mobile Station (MS) Conformance Specification; Part 4:
Subscriber Interface Module (Doc# 3GPP TS 11.10-4)
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[11] PCI Express Mini Card Electromechanical Specification Revision 1.2
[12] Universal Serial Bus Specification, Rev 2.0
[13] JESD22-A114-B
[14] JESD22-C101
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F
F: Acronyms
Table F-1: Acronyms and definitions
Acronym or term 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. 0: 400 700 kbps (downlink from the network) and 40 80
kbps (uplink to the network). Actual speed depends on the network conditions.
Compare to 1X.
1X Single Carrier (1X) Radio Transmission Technology. A high-speed standard for
cellular packet data communications.
Supports Internet connections with data rates up to 153 kbps (simultaneously in
each direction—downlink and uplink). Actual speed depends on the network
conditions. Compare to 1xEV-DO.
3GPP 3rd Generation Partnership Project
8PSK Octagonal Phase Shift Keying
AGC Automatic Gain Control
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
CAIT CDMA Air Interface Tool
CDG CDMA Development Group—a consortium of companies that develop and
promote the products and services for CDMA wireless systems.
CDMA Code Division Multiple Access.
A wideband spread spectrum technique used in digital cellular, personal
communications services, and other wireless networks. Wide channels (1.25
MHz) are obtained through spread spectrum transmissions, thus allowing many
active users to share the same channel. Each user is assigned a unique digital
code, which differentiates the individual conversations on the same channel.
CQI Channel Quality Indication
COM Communication port
CS Circuit-switched
CSA Canadian Standards Association
CW Continuous waveform
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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
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. watts).
DCS Digital Cellular System
A cellular communication infrastructure that uses the 1.8 GHz radio spectrum.
DL Downlink (network to mobile)
DRX Discontinuous Reception
DSM Distributed Shared Memory
DUT Device Under Test
EDGE Enhanced Data rates for GSM Evolution
eHRPD Evolved High Rate Packet Data — Enhances traditional 1xEV-DO to enable LTE
to CDMA handover.
EIRP Effective (or Equivalent) Isotropic Radiated Power
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. The FCC regulates commercial and private radio spectrum
management, sets rates for communications services, determines standards for
equipment, and controls broadcast licensing. Consult www.fcc.gov.
FDMA Frequency Division Multiple Access
FER Frame Error Rate — A measure of receive sensitivity.
firmware Software stored in ROM or EEPROM; essential programs that remain even when
the system is turned off. Firmware is easier to change than hardware but more
permanent than software stored on disk.
FOTA Firmware Over The Air — Technology used to download firmware upgrades
directly from the service provider, over the air.
FOV Field Of View
FSN Factory Serial Number—A unique serial number assigned to the mini card during
manufacturing.
GCF Global Certification Forum
Table F-1: Acronyms and definitions (Continued)
Acronym or term Definition
Acronyms
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GLONASS Global Navigation Satellite System
GMSK Gaussian Minimum Shift Keying modulation
GND Ground
GPRS General Packet Radio Service
GPS Global Positioning System
A system that uses a series of 24 geosynchronous satellites to provide
navigational data.
GSM Global System for Mobile Communications
Host The device into which an embedded module is integrated
Hz Hertz = 1 cycle / second
IC Industry Canada
IF Intermediate Frequency
IMEI International Mobile Equipment Identity
IMS IP Multimedia Subsystem — Architectural framework for delivering IP multimedia
services. (MC7750 supports MO / MT SMS over IMS for LTE / eHRPD.)
inrush current Peak current drawn when a device is connected or powered on
inter-RAT Radio Access Technology
IOT Interoperability Testing
IS Interim Standard.
After receiving industry consensus, the TIA forwards the standard to ANSI for
approval.
IS-2000 3G radio standards for voice and data (CDMA only)
IS-95 2G radio standards targeted for voice (cdmaONE)
LED Light Emitting Diode.
A semiconductor diode that emits visible or infrared light.
LHCP Left-Hand Circular Polarized
LNA Low Noise Amplifier
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
Table F-1: Acronyms and definitions (Continued)
Acronym or term Definition
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MEID Mobile Equipment Identifier — The unique second-generation serial number
assigned to the minicard for use on the wireless network.
MIMO Multiple Input Multiple Output—wireless antenna technology that uses multiple
antennas at both transmitter and receiver side. This improves performance.
NAS / AS Network Access Server
NC No Connect
NDIS Network Driver Interface SpecificationSpecification—a programming interface
specification for connecting network interface cards in Windows.
NIC Network Interface Card
NMEA National Marine Electronics Association
OEM Original Equipment Manufacturer—a company that manufactures a product and
sells it to a reseller.
OFDMA Orthogonal Frequency Division Multiple Access
OMA DM Open Mobile Alliance Device Management — A device management protocol.
OTA ‘Over the air’ (or radiated through the antenna)
PA Power Amplifier
packet A short, fixed-length block of data, including a header, that is transmitted as a unit
in a communications network.
PCB Printed Circuit Board
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.
This form of modulation uses amplitude, frequency, and phase to transfer data on
the carrier wave.
QMI Qualcomm MSM/Modem Interface
QOS Quality of Service
QPSK Quadrature Phase-Shift Keying
QPST Qualcomm Product Support Tools
RAT Radio Access Technology
Table F-1: Acronyms and definitions (Continued)
Acronym or term Definition
Acronyms
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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.
RSE Radiated Spurious Emissions
RSSI Received Signal Strength Indication
SDK Software Development Kit
SED Smart Error Detection
Sensitivity
(Audio) Measure of lowest power signal that the receiver can measure.
Sensitivity (RF) Measure of lowest power signal at the receiver input that can provide a prescribed
BER / BLER / SNR value at the receiver output.
SIB System Information Block
SIM Subscriber Identity Module. Also referred to as USIM or UICC.
SIMO Single Input Multiple Output—smart antenna technology that uses a single
antenna at the transmitter side and multiple antennas at the receiver side. This
improves performance and security.
SISO Single Input Single Output—antenna technology that uses a single antenna at
both the transmitter side and the receiver side.
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.
A feature that allows users of a wireless device on a wireless network to receive
or transmit short electronic alphanumeric messages (up to 160 characters,
depending on the service provider).
S/N Signal-to-noise (ratio)
SNR Signal-to-Noise Ratio
SOF Start of Frame — A USB function.
SSS Secondary synchronisation signal.
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.
TIS Total Isotropic Sensitivity
Table F-1: Acronyms and definitions (Continued)
Acronym or term Definition
Product Technical Specification & Customer Design Guidelines
94 Proprietary and Confidential - Contents subject to change2400074
TRP Total Radiated Power
UDK Universal Development Kit (for PCI Express Mini Cards)
UE User Equipment
UICC Universal Integrated Circuit Card (Also referred to as a SIM card.)
UL Uplink (mobile to network)
UL Underwriters Laboratory
UMTS Universal Mobile Telecommunications System
USB Universal Serial Bus
USIM Universal Subscriber Identity Module (UMTS)
VCC Supply voltage (3.3 V)
VSWR Voltage Standing Wave Ratio
WAN Wide Area Network
WCDMA Wideband Code Division Multiple Access (also referred to as UMTS)
WLAN Wireless Local Area Network
ZIF Zero Insertion Force
Table F-1: Acronyms and definitions (Continued)
Acronym or term Definition
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 95
Index
Numerics
1X
overview, 20
1xEV-DO
overview, 19
3D gain, average
gain
3D average (GPS), 67
3GPP compliance
LTE, 21
A
acceptance tests, 71
accessories, 17
accuracy (GPS), 43
acquisition time (GPS), 43
acronyms and definitions, 89– 94
antenna
connection considerations, 37
connectors, 23
custom, design, 38
diversity antenna, disabling, 38
GPS, specifications, recommended, 67
limit, matching coaxial connections, 37
location, considerations, 38
matching, considerations, 38
maximum cable loss, 37
routing, 38
specification, 65– 68
specifications, recommended, 65
testing, 67
antennas
design checklist, 69
application interface features, 15
approvals, regulatory and industry, 59
AT commands, 82
averaged call mode LTE / WCDMA / HSPA / HSPA+ DC
power consumption, 46
averaged standby DC power consumption, 45
B
bands supported, RF
summary, 15
CDMA, 42
LTE, 42
bearers, dedicated, 16
block diagram
expanded RF, 25
system, 24
bottom view, 54
C
cable loss
antenna, maximum, 37
CAIT support, 51
capacitors
with SIM, 32
with XIM_DATA / XIM_CLK, 32
carrier/operator testing, 81
CDMA
bands supported, 15
overview, 19
frequency band support, 42
TIA / EIA / IS compliance, 21
cell selection, 16
certification tests, 72
checklist, design, 69
communications, host to modem
design checklist, 70
conducted Tx power tolerances, 43
connection
grounding, 39
connectors, 37
connectors, required
host-module, 18
control interface, 33
CQI, 16
D
DC power consumption
averaged call mode LTE / WCDMA / HSPA /
HSPA+, 46
averaged standby, 45
CDMA, 46
desense. See RF
design checklist
antennas, 69
component placement, 69
EMI/ESD, 69
host/modem communications, 70
power, 69
thermal, 70
detach procedure, 16
Development Kit contents, 17
digital interface, 35
dimensioned view, 54
dimensions, 53, 54
Direct IP interface, 51
diversity antenna
disabling, 38
diversity connector, location, 37
drop specifications, 53
Product Technical Specification & Customer Design Guidelines
96 Proprietary and Confidential - Contents subject to change 2400074
E
EDGE
connector, required, 18
electrical specifications, 23
electrostatic discharge specifications, 53
electrostatic discharge. See ESD
envelope correlation coefficient, 66
environmental specifications, 53– 55
ESD
design checklist, 69
protection requirements, 55
ESD specifications, 53
EVDO
overview, 19
expanded RF block diagram, 25
F
FCC approval, 59
FER (Frame Error Rate), 41
field of view, 67
filtering, RF desense, 40
form factor, 53
FOV, 67
frame error rate (FER)
measure of sensitivity, 41
free space average gain, 67
frequencies supported, 41
frequency band support
CDMA, 42
LTE, 42
G
gain
GPS, 67
maximum, 60, 66
mean effective, 66
mean effective imbalance, 66
GCF-CC approval, 59
General purpose IO (GPIO), 35
GLONASS, 17
GPIO (General purpose IO), 35
GPS
antenna specifications, recommended, 67
connector location, 37
DC bias on connector, 17
features supported, 17
specifications, 43
ground specifications, 29
grounding
connection considerations, 39
H
host interface
pin assignments, 25
humidity specifications, 53
I
I/O connector location, 37
I/O rise time requirements, 32
impedance
module–antenna, 38
SIM, 32
industry approvals, 59
Industry Canada approval, 59
integration requirements, 18
interface
control interface, 33
digital interface, 35
Direct IP, 51
feature summary, 15
host, pin assignments, 25
QMI, 51
SIM, 30
software, 51
USB, 29
interference
device generated, 40
host-generated, 40
power supply noise, 50
wireless devices, 39
Interoperability testing, 81
intra-LTE mobility, 16
IOT testing, 81
iRAT, 16
IS-95A
overview, 20
isolation, 66, 67
L
labeling, 55
LED
example, 34
states, 34
LED output, 23, 33, 34
LTE
3GPP compliance, 21
overview, 19
bands supported, 15
bandwidth support, 42
features, 16
frequency band support, 42
M
mean effective gain, 66
mean effective gain imbalance, 66
mechanical specifications, 53– 55
MIB, 16
MIMO support, 15
Index
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 97
minicom
downloading and installing, 76
module
power states, 47– 49
N
NAS/AS security, 16
NDIS NIC interface support, 15
NIC interface support, 15
noise
leakage, minimizing, 39
RF interference, power supply, 50
O
OEM
assistance with testing, 81
labeling, 55
operator/carrier testing, 81
ordering information, 18
P
packaging, 85
packet mode features, 16
paging procedures, 16
PCB
multi-layer, shielding for RF desense, 40
PDN connections, multiple, 16
pin assignments, host interface, 25
PMI, 16
polarization, 67
position location, 17
power
design checklist, 69
handling, 66
power-up timing, 49
ramp-up timing, 49
state machines, 48
states, module, 47– 49
supply, RF interference, 50
supply, ripple limit, 50
power consumption, DC
averaged call mode LTE / WCDMA / HSPA / HSPA+, 46
averaged standby, 45
CDMA, 46
power specifications, 29
power tolerances, conducted Tx, 43
Product Support Tool, QUALCOMM (QPST), 51
Product Support Tool, Sierra Wireless (PST), 51
production tests, 73
PSS, 16
PST (Product Support Tool, Sierra Wireless), 51
PTCRB approval, 59
Q
QMI interface, 51
QPST (QUALCOMM Product Support Tool), 51
QUALCOMM Product Support Tool (QPST), 51
quality assurance tests, 80
QXDM support, 51
R
radiated efficiency, total, 65
radiated sensitivity measurement, 41
radiated spurious emissions, 40
radiation patterns, 65
references, 87– 88
regulatory approvals, 59
regulatory information, 59– 63
FCC, 60
limitation of liability, 59
safety and hazards, 59
resistors, external pull-up, 32
RF
antenna cable loss, maximum, 37
antenna connection, considerations, 37
connectors, required, 18
desense
device-generated, 40
harmonic energy, filtering, 40
mitigation suggestions, 40
shielding suggestions, 40
interference
other devices, 40
power supply, 50
wireless devices, 39
RF bands supported
summary, 15
CDMA, 42
LTE, 42
RF block diagram, expanded, 25
RF connector location, 37
RF specifications, 37– 44
RI, 16
RSE, 40
Rx sensitivity
conducted, 42
S
sales
ordering, 18
SED
see Smart Error Detection
See also W_DISABLE_N, 33
sensitivity
conducted, RF parameter, 42
defined, 41
radiated measurement, overview, 41
testing, overview, 41
Product Technical Specification & Customer Design Guidelines
98 Proprietary and Confidential - Contents subject to change 2400074
shielding
module, compliance, 37
reducing RF desense, 40
shock specifications, 53
SIB, 16
signals, 33
WLAN_LED_N, 34
SIM
capacitor recommendations, 32
card contacts, 31
clock rate, 32
connector, required, 18
electrical specifications, 32
impedance, connectors, 32
interface, 30
interface diagram, 31
operation, 32
Smart Error Detection
detecting module reset, 50
SMS features, 16
Snow 3G/AES security, 16
software interface, 51
specifications
electrical, 23
environmental specifications, 53– 55
GPS, 43
mechanical, 53– 55
RF, 37– 44
SSS, 16
standalone mode, GPS, 17
standby DC power consumption, averaged, 45
state machines, 48
support
features, 17
testing assistance by Sierra Wireless, 81
tools, 51
system acquisition, 16
system block diagram, 24
T
temperature specifications, 53
temperature, module. See thermal
testing
overview, 71
acceptance tests, 71
assistance provided by Sierra Wireless, 81
certification tests, 72
equipment, suggested, 81
interoperability and operator/carrier testing, 81
manual functional test, suggested, 73
production tests, 73
quality assurance tests, 80
RF receive path, CDMA, 77
RF receive path, LTE, 78
suggestions, 71– 84
thermal
considerations, 56– 57
design checklist, 70
dissipation, factors affecting, 56
dissipation, suggestions, 56
RF shield temperature, maximum, 57
testing, module, 57
TIA / EIA / IS compliance
CDMA, 21
timing
power ramp-up, 49
power-up, 49
top view, 54
Tx power tolerances, conducted, 43
U
UDK, 17
Universal Development Kit, 17
USB
drivers, user-developed, 30
enumeration, power-up, 49
high / full speed throughput performance, 29
interface, 29
V
vibration specifications, 53
VSWR, 65, 67
W
W_DISABLE_N, 33
warranty, 17
Wireless Disable, 23, 33
Wireless Disable (Main RF), 33
WLAN_LED_N, 33, 34
WMC DLL support, 16
Z
ZIF (Zero Intermediate Frequency), 39
