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RIM OEM Radio Modem for GSM/
GPRS Wireless Networks
RIM 1902G™ and RIM 1802G™
Integrator Guide
Version 1.2
Page 2
RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Version 1.2
Integrator Guide
Last revised: 22 August 2003
Part number: PDF-04522-005
MAT-05744-002
© 2003 Research In Motion Limited. All Rights Reserved. The BlackBerry and RIM families of
related marks, images and symbols are the exclusive properties of Research In Motion Limited.
RIM, Research In Motion, ‘Always On, Always Connected’, the “envelope in motion” symbol and
the BlackBerry logo are registered with the U.S. Patent and Trademark Office and may be pending
or registered in other countries. All other brands, product names, company names, trademarks and
service marks are the properties of their respective owners.
The handheld and/or associated software are protected by copyright, international treaties and
various patents, including one or more of the following U.S. patents: 6,278,442; 6,271,605; 6,219,694;
6,075,470; 6,073,318; D445,428; D433,460; D416,256. Other patents are registered or pending in
various countries around the world. Visit www.rim.net/patents.shtml for a current listing of
applicable patents.
While every effort has been made to achieve technical accuracy, information in this document is
subject to change without notice and does not represent a commitment on the part of Research In
Motion Limited, or any of its subsidiaries, affiliates, agents, licensors, or resellers. There are no
warranties, express or implied, with respect to the content of this document.
Research In Motion Limited
295 Phillip Street
Waterloo, ON N2L 3W8
Canada
Research In Motion UK Limited
Centrum House, 36 Station Road
Egham, Surrey TW20 9LF
United Kingdom
Published in Canada
Page 3
Important safety and compliance information
This section provides information on the following topics:
• FCC compliance statement (USA)
• Industry Canada Certification
• EU Regulatory Conformance
Page 4
Important safety and compliance information
FCC compliance statement (USA)
FCC Class B Part 15
This section applies to the RIM OEM Radio Modem for GSM/GPRS Wireless Networks (R6420GN).
The device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
• This device may not cause harmful interference, and
• This device must accept any interference received, including interference that may cause
undesired operation.
Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance
could void the user’s authority to operate this equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the manufacturer’s
instructions, may cause interference harmful to radio communications.
There is no guarantee, however, that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
4 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 5
Important safety and compliance information
Industry Canada Certification
This section applies to the RIM OEM Radio Modem for GSM/GPRS Wireless Networks (R6420GN).
The device complies with Industry Canada RSS 133, under certification number 2503A-R6420GN.
Class B compliance
The RIM OEM Radio Modem for GSM/GPRS Wireless Networks complies with the Class B limits
for radio noise emissions as set out in the interference-causing equipment standard entitled “Digital
Apparatus,” ICES-003 of Industry Canada.
EU Regulatory Conformance
This section applies to the RIM 1802G™ OEM Radio Modem for GSM/GPRS Wireless Networks
(R6420GE).
Research In Motion Limited hereby declares that the device is in compliance with the essential
requirements and other relevant provisions of Directive 1999/5/EC.
The original Declaration of Conformity made under Directive 1999/5/EC is available for viewing at
the following location in the EU community:
Research In Motion UK Limited
36 Station Road, Egham, Surrey
TW20 9LF
United Kingdom
Integrator Guide 5
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Important safety and compliance information
6 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 7
Contents
Important safety and compliance information ............................................3
FCC compliance statement (USA)....................................................................4
Industry Canada Certification..........................................................................5
Class B compliance .....................................................................................5
EU Regulatory Conformance............................................................................5
About this guide............................................................................................11
Related documentation....................................................................................11
CHAPTER 1 The RIM OEM Radio Modem for GSM/GPRS Wireless Networks................13
GPRS network technology ..............................................................................14
About the RIM 1902G and RIM 1802G radio modems...............................14
Range of applications............................................................................... 15
Receiver sensitivity...................................................................................16
Noise immunity ........................................................................................16
Powerful and efficient transmitter ......................................................... 17
Small size ...................................................................................................17
CHAPTER 2 Getting started..............................................................................................19
About the Integrator Kit ..................................................................................20
Working with RIM ...........................................................................................20
Integration overview........................................................................................21
CHAPTER 3 Setting up the Interface and Test Board .....................................................25
Interface and Test Board components ...........................................................26
Setting up the on-board SIM configuration..................................................27
Setting up the off-board SIM configuration .................................................32
Integrator Guide 7
Page 8
CHAPTER 4 Integrating the RIM OEM Radio Modem .....................................................37
Overview ........................................................................................................... 38
Mounting methods........................................................................................... 39
Bolts or standoffs ......................................................................................39
Tie wraps ................................................................................................... 40
Permanent industrial adhesive............................................................... 41
Cables and connectors ..................................................................................... 41
Radio interface cable and connector ......................................................41
SIM interface cable and connector .........................................................42
Antenna cable and connectors................................................................ 42
CHAPTER 5 Power requirements .....................................................................................45
Load specifications ...........................................................................................46
Power supply parameters .......................................................................46
Ripple specification ..................................................................................46
Power requirements ......................................................................................... 47
Batteries......................................................................................................47
Plug-in supplies ........................................................................................48
Automotive supplies................................................................................48
CHAPTER 6 Interface specification ..................................................................................49
RIM 1902G or RIM 1802G interface ...............................................................50
AT Commands..................................................................................................50
SIM interface pins............................................................................................. 51
Radio interface pins..........................................................................................52
Pins 1 to 4...................................................................................................52
Pins 5 to 22.................................................................................................52
Serial port...................................................................................................52
Pin descriptions ........................................................................................53
Turning on and turning off the radio ............................................................57
Turning on the radio ................................................................................ 57
Turning off the radio................................................................................ 57
Resetting the radio....................................................................................58
Loading firmware (optional) ..........................................................................58
8 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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CHAPTER 7 Antenna selection .......................... ...............................................................59
Antenna terminology .......................................................................................60
Selecting an antenna......................................................................................... 61
Antenna requirements .....................................................................................62
Antenna design considerations ......................................................................62
Shielding ............................................................................................................64
CHAPTER 8 Specifications ................................................................................................65
Power supply and typical current usage ..............................................66
RF properties .............................................................................................66
Serial communications............................................................................. 66
Mechanical and environmental properties ...........................................67
Audio.......................................................................................................... 67
Index...............................................................................................................69
Integrator Guide 9
Page 10
10 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 11
About this guide
This guide explains how to integrate the RIM OEM Radio Modem for GSM/GPRS Wireless
Networks into a variety of devices such as laptop computers, handhelds, vending
machines, point-of-sale terminals, vehicle-based mobile terminals, and alarm systems.
This guide includes the following topics:
• integration overview
• test board overview
• mounting requirements
• power (battery) requirements
• interfacing with the RIM radio modem
• antenna selection and placement
This guide provides suggestions and precautions to ease the implementation of a wireless
communication solution. To discuss the technical integration of this radio modem, contact
oemsupport@rim.net
RIM at
Related documentation
.
The Integrator Kit includes the
that apply to the RIM 1902G and RIM 1802G radio modems.
AT Command Reference Guide
, which lists the AT commands
Page 12
About this guide
12 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 13
Chapter 1
The RIM OEM Radio Modem for GSM/GPRS Wireless Networks
This section provides information on the following topics:
• GPRS network technology
• About the RIM 1902G and RIM 1802G radio modems
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Chapter 1: The RIM OEM Radio Modem for GSM/GPRS Wireless Networks
GPRS network technology
The Global System for Mobile Communication (GSM) has become the international voice
communication standard. The General Packet Radio Service (GPRS) supplement to the GSM
network was first proposed in 1992 to combine telecom and datacom, and the result has been wellreceived. For more information on GSM and GPRS, visit
GPRS is a packet switched overlay to the circuit-switched GSM network that gives a mobile device
on that network “always on” capabilities. GPRS technology enables for a theoretical maximum
transfer speed of 171.2 kbps. It is also IP-based, which means that a mobile device on the GPRS
network is Internet-aware.
GPRS/GSM networks are deployed worldwide. Enabling GPRS communication on GSM networks
requires only two additional hardware devices and a software upgrade. Many GSM network
providers have already supplemented their networks with GPRS capability.
http://www.gsm.org
.
About the RIM 1902G and RIM 1802G radio modems
The RIM OEM Radio Modem for GSM/GPRS Wireless Networks sets a new standard for radio
modem performance. The radio modem’s small size and weight makes it suitable for virtually any
wireless data and voice application, including handheld devices and mobile terminals. Its multislot
class allows for the highest allowable download rates using a single receiver on a GPRS network.
The RIM OEM Radio Modem for GSM/GPRS Wireless Networks consists of the following models:
• RIM 1902G™
• RIM 1802G™
Model Description
RIM 1902G™ This model is designed for use with GPRS and GSM wide-area wireless voice and data
networks operating in the 1900 MHZ and 850 MHz range in North America. The off-board SIM
card configuration has a 6-pin ZIF connection that enables you to position the SIM card in the
location that best suits your design.
A configuration with an on-board SIM card is also available.
RIM 1802G™ This model is designed for use with GPRS and GSM wide-area wireless voice and data
14 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
networks operating in the 900 MHz and 1800 MHz ranges outside of North America. The offboard SIM configuration has a 6-pin ZIF connection, which allows you to position the SIM
card in the location that best suits your design.
A configuration with an on-board SIM card is also available.
Page 15
About the RIM 1902G and RIM 1802G radio modems
The RIM 1902G and RIM 1802G offer the following features:
• range of applications
• radio performance
• receiver sensitivity
• noise immunity
• powerful and efficient transmitter
• small size
These benefits of these features are described below.
Range of applications
RIM radio modems are designed to integrate easily into computing devices for a wide range of
applications, such as the following ones:
• laptop computers
•vehicle tracking
• point-of-sale devices
• monitoring and telemetry applications
• ruggedized terminals
• vending machines
• handheld computers
• utility meters
• parking meters
• billboards
• dispatching applications
• security alarm panels
Integrator Guide 15
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Chapter 1: The RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Receiver sensitivity
Receiver sensitivity is a measure of how well the radio modem can receive and decode data from a
network base station. This figure is important when a device is used in areas where signal strength
is weak, such as inside buildings and in locations that are not close to a base station. A radio modem
with good receiver sensitivity can be used in more places than a radio modem with poor receiver
sensitivity.
The RIM 1902G and RIM 1802G typically have receiver sensitivities of -107 dBm with a 2.2439% bit
error rate (BER).
Note: BER is an industry standard error rate that is used to define sensitivity; it does not indicate that 2.2439%
of the data that is passed by the radio to the application is corrupted.
Noise immunity
The RIM 1902G and RIM 1802G are not desensitized by the electromagnetic interference (EMI) or
“noise” that is generated by the electronics of the terminal into which it is integrated. As a result, no
special shielding is required between the radio and your device.
Noise immunity offers several key benefits:
• easier integration
• longer battery life
• increased reliability
• improved RF performance
• more coverage from each base station
• no need for special RF shielding
16 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 17
About the RIM 1902G and RIM 1802G radio modems
Powerful and efficient transmitter
When necessary, the RIM 1902G can supply a full 1 watt at 1900 MHz and 0.8 watts at 850 MHz. The
RIM 1802G can supply a full 1 watt at 1800 MHz and 2 watts at 900 MHz. The RIM 1902G and RIM
1802G quickly decrease the output power when it is close to a base station, because a stronger signal
is needed only when the radio modem is far from a base station. By transmitting a strong signal only
when it is necessary, the RIM 1902G and RIM 1802G conserve battery power and provide a balanced
link.
The RIM OEM Radio Modem for GSM/GPRS Wireless Networks provides reliable transmission
efficiency across the entire operating voltage range of 3.5 to 4.75 volts. As a result, batteries can be
used even when they are near depletion. The transmission efficiency also maximizes the radio
coverage area throughout the life of the battery.
Small size
Because of its single board design, the RIM OEM Radio Modem for GSM/GPRS Wireless Networks
is very thin and, at only 42.0-by-67.5 mm, is smaller than a business card. This small size enables the
radio modem to meet most applications’ tight space requirements. The radio modem’s single-board
design is more reliable than multiboard designs, particularly in high-vibration environments (such
as vehicles) or in devices that can be dropped (such as handheld devices).
Integrator Guide 17
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Chapter 1: The RIM OEM Radio Modem for GSM/GPRS Wireless Networks
18 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 19
Chapter 2
Getting started
This section provides information on the following topics:
• about the Integrator Kit
•working with RIM
• integration overview
Page 20
Chapter 2: Getting started
About the Integrator Kit
RIM is committed to facilitating the integration of the RIM OEM Radio Modem for GSM/GPRS
Wireless Networks. RIM provides works closely with partners to evaluate the feasibility of
implementing a wireless communication solution and to develop an application in the shortest time
possible.
The Integrator Kit includes several tools to help streamline the evaluation and integration process.
Using the kit, you can quickly interface the radio modem to your computing device.
Note: The radio modem that is part of the Integrator Kit is not activated on the GPRS network until a SIM card,
which has been activated for GPRS communication, is attached to the device through the proper lines. Contact
your GPRS network provider to obtain a SIM card and activate the radio modem.
Working with RIM
RIM has an experienced team to help you design and implement your wireless communication
solutions. If you need help getting started, or if you have any questions about the radio technology
or its integration into your platform, contact the engineering development team:
Phone: (519) 888-7465 ext. 5200
Fax: (519) 883-4940
oemsupport@rim.net
Email:
Web site:
http://www.rim.net/oem
20 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 21
Integration overview
The following diagram illustrates the integration process.
Integration overview
Integrator Guide 21
Page 22
Chapter 2: Getting started
The following table describes each step in the integration process. For more information, contact
oemsupport@rim.net
RIM at
or visit
http://www.rim.net/oem
.
Step Description
Contact the RIM OEM team Email
Obtain Integrator Kit Request the Integrator Kit from Research In Motion. This kit includes the
Read the Integrator Guide Read the Integrator Guide first to make sure that you follow proper
Obtain SIM card Contact the appropriate network provider to obtain a SIM card.
Activate GPRS account Contact the appropriate network provider to activate the GPRS account.
Contact certification labs Learn about obtaining certification. Radio frequency (RF) emitting
Start development Plan your project carefully before you start development. You must
OEMinquiry@rim.net
information about RIM Radio Modem products and whether they are
suitable for your application.
radio modem, two mechanical samples of the radio, an Interface and Test
Board, AC to DC power supply, required cables, magnetic mount
antenna, and documentation.
procedures to prevent unnecessary delays and equipment damage. This
guide explains topics such as mounting requirements, battery power
characteristics, interfaces, and antenna selection and placement.
products cannot be sold until you have the necessary government
approvals. Understanding what you are permitted to do before
beginning your design will help you to avoid redesign costs.
address several important considerations when you pl an yo ur de sign. To
speed up the development process, you can often perform several
procedures simultaneously.
or call (519) 888-7465 x5200 to obtain more
Develop software Contact RIM if you encounter any problems with the communication
between the off-board processor and the radio.
Develop an antenna Start developing an antenna. The antenna that is provided with the
Integrator Kit has been certified for use with the RIM OEM Radio Modem
for GSM/GPRS Wireless Networks. If this antenna does not meet your
needs, develop an antenna for use with the final product.
Refer to the Integrator Guide for guidelines on selecting an antenna. You
can also contact RIM for general assistance and for recommendations of
antenna companies that can provide further assistance.
22 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Step Description
Integration overview
Develop a power supply Start developing the power supply for the product. Refer to the Integrator
Complete PCB and remaining
development
Conduct field trials Start product field trials to assess performance and reliability.
Perform certification Choose a testing lab to perform appropriate certification:
Guide for guidelines on the strict power requirements of the RIM radio
modem.
Start developing the housing and printed circuit board (PCB) for the
product. Refer to the Integrator Guide for guidelines on radio and antenna
placement.
• For RIM 1902G: FCC, Industry Canada, and PTCRB
• For RIM 1802G: R&TTE and GCF
Pilot/Beta release Contact RIM prior to the beta release of the product, especially if the
product has not been certified yet. There are specific guidelines that
must be followed prior to certification to confirm that the release
conforms to legal requirements.
Final release Contact RIM if you encounter any obstacles related to the RIM OEM Radio
Modem for GSM/GPRS Wireless Networks. Provide RIM with regular
updates on the progress of the release.
Integrator Guide 23
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Chapter 2: Getting started
24 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Chapter 3
Setting up the Interface and Test Board
This section provides information on the following topics:
• Interface and Test Board components
• Setting up the Interface and Test Board (on-board SIM configuration)
• Setting up the Interface and Test Board (off-board SIM configuration)
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Chapter 3: Setting up the Interface and Test Board
Interface and Test Board components
The RIM Interface and Test Board provides a standard RS-232 serial interface between a computer
and the radio modem. The Interface and Test Board enables you to connect the RIM OEM Radio
Modem for GSM/GPRS Wireless Networks to a standard computer using a COM port or to a
terminal device using a RS-232 serial port. The Interface and Test Board also provides access points
to the radio’s communication port, which enables you to monitor activity with a logic probe,
multimeter, or oscilloscope.
The Interface and Test Board includes the following components and functionality:
• RS-232 interface
• on/off switch
• test points
• power supply
• LED indicators
•standard SIM slot
• microphone/speaker jacks
• FPC cable connector
The following table describes Interface and Test Board components.
Component Description
RS-232 interface The serial (COM) port on a computer, and most terminal devices, operates at RS-232
signal levels, which are typically ±12V. This high voltage would damage the RIM OEM
Radio Modem for GSM/GPRS Wireless Networks, which is typically integrated into a
device that operates an asynchronous serial port at 3V. The RS-232 interface on the
Interface and Test Board enables you to produce an output from the radio that is easily
interpreted by a computer.
On/off switch When the switch is on, the radio turns on whenever power is applied to the Interface
and Test Board. When the switch is off, the radio turns off. Refer to "Turning on and
turning off the radio" on page 57 for more information.
Test points The Interface and Test Board is more than an RS-232 interface. It provides direct access
to each of the 22 pins on the radio interface cable, which enables connectivity to
analytical equipment, such as a logic probe, multimeter, or oscilloscope, and indicates
real-time data flow.
26 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Setting up the on-board SIM configuration
Component Description
Power supply The RIM OEM Radio Modem for GSM/GPRS Wireless Networks requires a clean, high-
LED indicators The Interface and Test Board includes LED indicators to indicate the flow of data to and
Standard SIM card holder The Interface and Test Board includes a SIM card holder for use with standard 3V or 5V
Microphone/speaker jacks The Interface and Test Board includes microphone and speaker jacks for use with the
FPC cable connector The flexible printed circuit (FPC) cable connector is used to connect the 22-pin FPC
current power source. RIM uses a standard plug-pack to provide the current that is
necessary to operate the radio. The voltage is converted into the necessary levels by the
power supply section of the Interface and Test Board.
from the host (in real time), the radio power status, power to the Interface and Test
Board, network coverage, and more.
SIM cards. The SIM card is necessary to access GSM/GPRS networks.
headset that is included in the Integrator Kit. The microphone and speaker jacks enable
you to use the GSM circuit-switched voice network that underlies the GPRS networks.
cable to the Interface and Test Board.
Setting up the on-board SIM configuration
To use the Interface and Test Board that is provided with your Integrator Kit, you must connect the
RIM 1902G or RIM 1802G to an antenna, SIM card, and a computer (or another device with a RS-232
serial interface). Use the Interface and Test Board and cables that are supplied with your Integrator
Kit.
To set up the Interface and Test Board, complete the following steps:
1. Connect the radio modem to the Interface and Test Board.
2. Connect the Interface and Test Board to the computer.
3. Insert the SIM card into the SIM card holder.
4. Connect the antenna to the radio modem.
5. Connect the Interface and Test Board to an AC outlet.
6. Turn on the system.
7. Connect the headset.
The following diagram illustrates the Interface and Test Board and major components for the onboard SIM card configuration.
Integrator Guide 27
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Chapter 3: Setting up the Interface and Test Board
Power jack
RS-232
interface
22-pin
connector
cable
GPRS
radio modem
Microphone and
speaker jacks
Mic Spkr
On/off switch
Test point
LED
indicator
Interface and Test Board for on-board configuration – top view
28 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 29
Setting up the on-board SIM configuration
To connect the radio modem to the Interface and Test Board
Note: This step is only necessary if the radio modem is not already connected to the Interface and Test Board.
The 22-pin flat interface cable supplies clean, regulated power to the radio and carries most of the
data and all of the voice between the Interface and Test Board and the radio modem. This cable also
carries control and status signals, such as ONI.
1. At the top of the radio modem, push the two black tabs up and away from the connector.
Connecting the 22-pin cable to the radio modem
2. With the blue side facing the Interface and Test Board, insert the end of the 22-pin cable into the
connector. Verify that the side with the bare pins is in direct contact with the pin side of the
connector.
Note: Do not force the cable into the connector.
3. At the top of the radio modem, push the black tabs down toward the connector to secure the
cable.
4. Repeat steps 1 through 3 for the 22-pin connector on the Interface and Test Board.
To connect the Interface and Test Board to the computer
Use the straight-through DB-9 serial cable to connect the Interface and Test Board to the computer.
Connect the male end of the cable to the Interface and Test Board. Connect the female end of the
cable to an available COM port on the computer.
Integrator Guide 29
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Chapter 3: Setting up the Interface and Test Board
To insert the SIM card into the SIM card holder
Warning: To prevent damage to your SIM card, do not scratch or bend the card or expose it to static electricity
or wet conditions.
Note: You must have a SIM card that is authorized for use by the appropriate GPRS network provider. The
authorization must also allow access to the Access Point Name (APN) that will be targeted.
1. Turn the test board over to reveal the cut-out that provides access to the SIM card holder on the
underside of the radio modem.
Underside of the test board showing the on-board SIM card holder
2. Slide the SIM card holder in the direction of the arrow to unlock it, and then lift the cover open.
30 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 31
Setting up the on-board SIM configuration
3. Slide the SIM card into the cover with the conductive side facing the leads on the board. The
notched end of the SIM card should align with the notch in the SIM card holder.
4. Close the cover. Slide the cover in the reverse direction of the arrow to lock it into place.
To connect the antenna to the radio modem
Note: If you connect the antenna before you connect the Interface and Test Board to an AC outlet, the radio
modem detects network coverage more reliably.
The Integrator Kit includes a high-performance, 3 dBd-gain magmount antenna, which is
terminated by a screw-on SMA plug. The radio modem includes a snap-on MMCX jack.
1. Insert the antenna into the base and turn the antenna until the two components are securely
fastened.
2. Insert the SMA cable connector into the MMCX connector and turn the SMA connector until the
two components are fastened securely.
Connecting the SMA cable to the MMCX connector
3. Insert the MMCX connector into the radio modem’s MMCX jack.
4. Position the antenna for optimal coverage. The magmount antenna provides optimum RF
performance when it is placed on a broad metal surface, such as the roof of a car. If you are
using the antenna inside a building, for improved performance, place it near a window with few
obstacles (such as a wall, furniture, or equipment) between the antenna and the window.
To connect the Interface and Test Board to an AC outlet
Plug the 5V DC, 2.4A, center-pin-positive power adapter into an electrical outlet. Connect the other
end to the Interface and Test Board’s power jack.
To turn on the system
Move the power switch to the
When the radio is on, the LED marked
page 57 for more information.
Integrator Guide 31
TURNON
position.
ONI
is lit. Refer to "Turning on and turning off the radio" on
Page 32
Chapter 3: Setting up the Interface and Test Board
To connect the headset
1. Insert the microphone plug into the microphone jack.
2. Insert the speaker plug into the speaker jack.
Setting up the off-board SIM configuration
To use the Interface and Test Board that is provided with your Integrator Kit, you must connect the
RIM OEM Radio Modem for GSM/GPRS Wireless Networks to an antenna, SIM card, and computer
(or another device with a RS-232 serial interface). Use the Interface and Test Board and cables that
are supplied with your Integrator Kit.
To set up the Interface and Test Board, complete the following steps:
1. Connect the SIM card to the Interface and Test Board.
2. Connect the radio modem to the Interface and Test Board.
3. Connect the Interface and Test Board to the computer.
4. Insert the SIM card into the SIM card holder.
5. Connect the antenna to the radio modem.
6. Connect the Interface and Test Board to an AC outlet.
7. Turn on the system.
8. Connect the headset.
The following diagram illustrates the Interface and Test Board and major components for the offboard SIM configuration.
32 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Setting up the off-board SIM configuration
Power jack
RS-232
interface
6-pin
connector
SIM card
holder
GPRS
radio modem
Microphone and
speaker jacks
Mic Spkr
On/off switch
22-pin
connector
cable
Test point
LED
indicator
Interface and Test Board for off-board configuration— top view
To connect the SIM card to the Interface and Test Board
Note: This task only applies to the off-board SIM configuration.
The 6-pin flat SIM interface cable carries the data and power between the Interface and Test Board
SIM slot and the radio modem.
1. Remove the radio modem from the Interface and Test Board: unfasten the nuts and lift the radio
modem up and away from the Interface and Test Board.
Integrator Guide 33
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Chapter 3: Setting up the Interface and Test Board
2. On the underside of the modem, on the connector, push the two black tabs up from the
connector to widen the opening.
Underside of radio modem showing the 6-pin connector
3. With the blue side facing the Interface and Test Board, insert the end of the cable 6-pin cable into
the connector. Verify that the side with the bare pins is in direct contact with the pin side of the
connector.
Note: Do not force the cable into the connector.
4. Push the black tabs down toward the connector to secure the cable.
5. Repeat steps 2 through 4 to connect the 6-pin connector to the Interface and Test Board.
6. Re-attach the radio modem to the Interface and Test Board.
To connect the radio modem to the Interface and Test Board
Note: This step is only necessary if the radio modem is not already connected to the Interface and Test Board.
The 22-pin flat interface cable supplies clean, regulated power to the radio and carries most of the
data and all of the voice between the Interface and Test Board and the radio modem. This cable also
ONI
carries control and status signals, such as
1. At the top of the radio modem, push the two black tabs up and away from the connector.
34 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
.
Page 35
Setting up the off-board SIM configuration
Connecting the 22-pin cable to the radio modem
2. With the blue side facing the Interface and Test Board, insert the end of the 22-pin cable into the
connector. Verify that the side with the bare pins is in direct contact with the pin side of the
connector.
Note: Do not force the cable into the connector.
3. At the top of the radio modem, push the black tabs down toward the connector to secure the
cable.
4. Repeat steps 1 through 3 for the 22-pin connector on the Interface and Test Board.
To connect the Interface and Test Board to the computer
Use the straight-through DB-9 serial cable to connect the Interface and Test Board to the computer.
Connect the male end of the cable to the Interface and Test Board. Connect the female end of the
cable to the computer’s COM port.
To insert the SIM card into the SIM card holder
Warning: To prevent damage to your SIM card, do not scratch or bend the card or expose it to static electricity
or wet conditions.
Note: You must have a SIM card that is authorized for use by the appropriate GPRS network provider. The
authorization must also allow access to the APN that will be targeted.
1. Slide the SIM card holder in the direction of the arrow to unlock it, and then lift the cover open.
2. Slide the SIM card into the cover with the conductive side facing the leads on the board. The
notched end of the SIM card should align with the notch in the SIM card holder.
3. Close the cover, and then slide the cover in the reverse direction of the arrow to lock it into place.
Integrator Guide 35
Page 36
Chapter 3: Setting up the Interface and Test Board
To connect the antenna to the radio modem
Note: If you connect the antenna before you connect the Interface and Test Board to an AC outlet, the radio
modem detects network coverage more reliably.
The Integrator Kit includes a high-performance, 3 dB-gain magmount antenna, which is terminated
by a screw-on SMA plug. The radio modem includes a snap-on MMCX jack.
1. Insert the antenna into the base and turn the antenna until the two components are securely
fastened.
2. Insert the SMA cable connector into the MMCX connector and turn the SMA connector until the
two components are fastened securely.
Connecting the SMA cable to the MMCX connector
3. Insert the MMCX connector into the radio modem’s MMCX jack.
4. Position the antenna for optimal coverage. The magmount antenna provides optimum RF
performance when it is placed on a broad metal surface, such as the roof of a car. If you are using
the antenna inside a building, for improved performance, place it near a window with few
obstacles (such as a wall, furniture, or equipment) between the antenna and the window.
To connect the Interface and Test Board to an AC outlet
Plug the 5V DC, 2.4A, center-pin-positive power adapter into an electrical outlet. Connect the other
end to the Interface and Test Board’s power jack.
To turn on the system
Move the power switch to the
When the radio is on, the LED marked
page 57 for more information.
TURNON
position to allow the radio modem to power up.
ONI
is lit. Refer to "Turning on and turning off the radio" on
To connect the headset
1. Insert the microphone plug into the microphone jack.
2. Insert the speaker plug into the speaker jack.
36 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Chapter 4
Integrating the RIM OEM Radio Modem for GSM/ GPRS Wireless Networks
This section provides information on the following topics:
•Overview
• Environmental properties
• Storage temperature
• Operating temperature
• Physical properties
•Mounting methods
• Cables and connectors
Page 38
Chapter 4: Integrating the RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Overview
This section provides you with information on issues that you should consider when you are
developing your application’s hardware. You can use this information and the additional
components provided with the Integrator Kit as a resource as you develop your application’s
hardware.
The Integrator Kit includes several components that can help you develop your product’s housing
and physically integrate the radio modem and associated hardware into your application. These
components consist of two 22-pin connector cables, two 6-pin connector cables (off-board SIM
configuration), and two radio modem mechanical samples.
Mechanical diagram of GPRS OEM radio modem
Refer to "Specifications" on page 65 for more information on mechanical and environmental
properties.
38 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 39
Mounting methods
Mounting methods
RIM OEM Radio Modem for GSM/GPRS Wireless Networks can be securely fastened using a variety
of methods; however, you must consider the operating environment when you choose a mounting
option. For example, extreme temperature, heavy vibration, or areas with high electromagnetic
interference can require a special mounting solution. You must make sure that the radio modem
remains securely attached in the environment in which it is used.
This section describes the following mounting methods:
• bolts or standoffs
•tie wraps
• permanent industrial adhesive
The following information is presented as a guide; however, applications can vary considerably. A
mechanical engineer can help you make sure that the mounting method that you choose is suitable
for your application.
Bolts or standoffs
The radio modem includes a hole in each corner, which can be used to bolt the device onto a circuit
board, device housing, standoffs, or other surface. The mounting hole pattern is four holes in a 62.5by-36.5 mm rectangle, with each hole 2.5 mm in diameter.
To allow room under the radio for components on your board, you can use standoffs instead of
bolts, as illustrated in the following diagram.
Integrator Guide 39
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Chapter 4: Integrating the RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Radio mounting details
Tie wraps
You can also use tie wraps as a secure but non-permanent means of attaching the radio modem to a
surface. Typically, each tie wrap passes through a hole drilled into the board’s surface on either side
of the radio modem. This enables the radio to be attached to a shell, a PCB, or other mounting
surface.
Warning: If you use tie wraps, make sure that the surface beneath the radio modem is flat. Otherwise, the
mounting surface can push up on the bottom surface of the radio case, and the tie wraps, when tightened, can
push down on the edge of the radio case. This pressure can cause the radio modem’s metal case to flex upward
and short circuit components inside the radio.
40 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 41
Cables and connectors
Permanent industrial adhesive
The RIM OEM Radio Modem for GSM/GPRS Wireless Networks is small and lightweight enough to
be attached to the host device using an industrial adhesive. For some applications, this mounting
method is preferable to bolts, because adhesive is easier to use in a manufacturing environment and
is more resistant to loosening than bolts. In many cases, an effective solution is to adhere the radio
modem to the inside surface of your product’s casing.
Choose an adhesive based on its ability to stick to the material that is used in the radio modem’s
outer casing and the surface to which the radio modem will be mounted. The RIM OEM Radio
Modem for GSM/GPRS Wireless Networks’s bottom casing is magnesium.
Note: You should choose foam tape for rough surfaces and adhesive tape for smooth surfaces.
Cables and connectors
The radio modem includes the following connectors:
• radio interface connector
• SIM interface connector (off-board SIM configuration)
• antenna connector
Radio interface cable and connector
The radio interface connector connects the radio modem to a serial computing device, speaker and
microphone, and power supply. Serial communication data, control signals, and power are carried
on a flat 22-conductor 0.30 mm (0.012 inches) thick flexible printed circuit (FPC) cable. This cable has
1-mm centerline spacing that can plug into a matching connector.
Because each application is unique, you might need to create a custom flat flex cable (FFC) jumper
that has the correct length and correct connector orientation for your application. Refer to the
following diagram for more information.
Note: The interface cable that is supplied with the Integrator Kit is a Type D 76.2 mm (3.0 inches) long FFC
Jumper with 1-mm centerline spacing, Molex part number 210390382. This cable can plug into a matching 22position 1.0 [0.039] horizontal FPC connector. Contact RIM at
appropriate connector for your application.
Integrator Guide 41
oemsupport@rim.net
for help with selecting an
Page 42
Chapter 4: Integrating the RIM OEM Radio Modem for GSM/GPRS Wireless Networks
SIM interface cable and connector
Note: The SIM interface cable and connector are required for the off-board SIM card configuration only.
The SIM interface cable and connector connects a SIM card to the radio modem. All SIM
communication data and power are carried on a flat 6-conductor 0.30 mm (0.012") thick flexible
printed circuit (FPC) cable. This cable has 1-mm centerline spacing that can plug into a matching
connector.
Because each application is unique, you might need to create a custom FFC jumper that has the
correct length and connector orientation for your application.
Note: The 6-pin interface cable supplied with the Integrator Kit is a 76.2 mm (3.0") long Flat Flex Cable (FFC)
Jumper with 1-mm centerline spacing and same side conductive surfaces, Parlex part number 100-6-76-B.
This cable can plug into a matching 6-position 1.0 [0.039] horizontal FPC connector. A variety of connectors are
available. Contact RIM at
application.
oemsupport@rim.net
for help with selecting an appropriate connector for your
Antenna cable and connectors
The antenna cable and connector connects the antenna to the radio modem. RIM uses the industrystandard MMCX connector for the RIM OEM Radio Modem for GSM/GPRS Wireless Networks. The
MMCX connector is very small, and it has the mating force to withstand heavy vibration.
Typically, an antenna does not plug directly into a RIM 1902G or RIM 1802G. Instead, a cable is used
between the radio’s antenna connector and a second connector at the device’s outer casing. This
enables the antenna to be removed from the system without opening the device, and it eliminates a
source of strain on the radio’s MMCX connector.
The antenna cable that you use should have low loss, an impedance of 50 Ohm, and an MMCX plug
that mates with the RIM 1902G or RIM 1802G MMCX jack. The other end of the cable can be any
connector with an impedance of 50 Ohm. An SMA screw-on connector is suitable and widely
available. TNC connectors are also suitable, but they are larger than SMA connectors.
Note: The antenna cable supplied with the Integrator Kit has an MMCX connector on one end and an SMA
connector on the other. The cable is built with strain reliefs to prevent damage.
The following cable is included with the Integrator Kit:
42 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 43
Cables and connectors
Integrator Kit antenna cable
Huber & Suhner provides antenna cables and connectors. The parts described below have an
impedance of 50 Ω and are suitable for use with the RIM 1902G or RIM 1802G.
Part number Cable or connector
11MMCX-50-2-1C/111 Straight MMCX connector
16MMCX-50-2-1C/111 Right-angle MMCX connector
25SMA-50-2-25/111 SMA connector
EZ Flex 405 Low-loss matching (50W) cable
133REEZ4-12-S2/1216 8” cable, straight MMCX to SMA
133REEZ4-12-S2/1699 8” cable, right-angle MMCX to SMA
Integrator Guide 43
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Chapter 4: Integrating the RIM OEM Radio Modem for GSM/GPRS Wireless Networks
44 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 45
Chapter 5
Power requi rements
This section provides information on the following topics:
• Load specifications
• Power requirements
• Batteries
• Plug-in supplies
• Automotive supplies
Page 46
Chapter 5: Power requirements
Load specifications
The RIM 1902G or RIM 1802G draw their power in bursts; the power required changes rapidly
depending on whether the radio is transmitting, receiving, or idle.
Power supply parameters
The RIM 1902G or RIM 1802G requires a clean, stable 3.5 to 4.75 volt source that is capable of
delivering a 577us burst every 4.616 ms of up to 1.2 A (for the RIM 1902G) or 2.0 A (for the RIM
1802G) when it is required by the transmitter. RIM recommends that you design a more robust
power supply that can provide adequate power under such non-ideal conditions as an improperly
matched antenna, under which this burst could be as high as 2.2 A.
If you want your RIM GPRS hardware integration to be compatible with the RIM 902M™ and RIM
802D™ radio modems, make sure that the power input to the radio modem is above 4.1 V. Contact
the RIM OEM Integration Specialist team for further details on backwards compatibility.
Ripple specification
For best performance, RIM recommends a ripple of less than 15 mV peak-to-peak (measured at the
radio end of the connector) across the frequency range 60 Hz to 1 MHz. The maximum ripple at the
connector that can be tolerated is 20 mV peak-to-peak.
Except in special cases where there are several sources of ripple, you should measure the ripple with
an oscilloscope set to 1-MHz bandwidth; the peak-to-peak value is not to exceed 15 mV.
Note: If there are several ripple components, or if the ripple is measured with a larger (typically 20-MHz)
bandwidth, the ripple appears to be worse than it is. If the ripple is still below 15 mV under these conditions, it
meets the ripple specification.
You can place a passive LC (series L, shunt C) power filter between your power supply and the RIM
radio modem to reduce ripple at the radio connector. The radio modem already has approximately
70 µF of on-board shunt capacity. The inductor cannot exceed 100 µH (otherwise, transients could
reset the radio), it must be rated to pass the maximum DC current of 2.2 A supply current at all
temperatures, and its resistance must be low enough to guarantee minimum voltage of 3.5V to the
radio modem at 2.2 A.
46 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 47
Power requirements
Power re quirements
The RIM 1902G or RIM 1802G requires a clean power source that is capable of delivering bursts of
high current. You can provide this power source through the following sources:
• a rechargeable battery pack or single-use batteries
• a plug-in power supply unit
• an automotive supply
These sources are discussed below.
Batteries
If the RIM 1902G or RIM 1802G is integrated into a handheld device, it can be powered by batteries.
This technology is easily available, and it eliminates the need for power supply components, such as
voltage regulators.
Rechargeable batteries
Nickel cadmium
For battery-operated applications that require a wide operating temperature range, RIM
recommends using rechargeable nickel cadmium (NiCad) batteries to power the radio modem. You
can also successfully use nickel metal hydride (NiMH) and lithium ion (Li+) cells. However, many of
these cells work poorly at temperatures below freezing. Battery specifications should be obtained
from the manufacturer.
The cells that you use must meet the radio modem load specifications (refer to page 46); for
transmission, they must provide 1.2 A (RIM 1902G) or 2.0 A (for the RIM 1802G) at 4.2V.
Rechargeable cells vary considerably; even if two cells have the same published capacity, one might
be less efficient than another when the radio transmitter is turned on. This is because some batteries
have a higher equivalent series resistance (ESR) at high current drain. The ESR should be low
enough that the battery can supply the transmission current required without a large voltage drop.
Integrator Guide 47
Page 48
Chapter 5: Power requirements
Alkaline
You can also use rechargeable alkaline batteries. These cells are typically rated for about 25
discharge cycles, far fewer than NiCads, but they provide longer life than NiCads. For the first 5 to
10 cycles, you will receive about 70 to 80 percent of the battery life that you would expect from a
single-use alkaline cell. After 25 discharges, this number might drop to 50 percent.
Warning: You must take precautions with alkaline rechargeable batteries. These cells are not intended to be
used to their full capacity, so their actual useful runtime is closer to 30 to 40 percent of a single-use alkaline cell,
and they require the user to pay closer attention to the battery state. If you fully discharge a rechargeable
alkaline battery, you may be able to recharge only a few times before the capacity decreases to the point where
it can no longer be used.
Single-use batteries
Of the single-use cells, only alkaline and lithium cells provide the high current necessary for
transmission. However, AA alkaline cells are likely the best choice. They are inexpensive, widely
available, and provide an excellent power source. Alkaline cells typically run for approximately four
times longer than similar-size NiCad cells and for approximately three times longer than similarsize NiMH cells.
Warning: RIM strongly discourages the use of general-purpose carbon-based batteries; this type of battery
cannot supply the power required by the transmitter. You should recommend that users of your product use
single-use batteries that are clearly identified as alkaline.
Plug-in supplies
A plug-in supply converts normal AC power (usually 110V or 220V) into a steady DC source that
can be used instead of batteries. You must design your plug-in supply to make sure that voltage
spikes, lightning, and other power fluctuations cannot damage the radio modem. To keep the inputs
within the load limits of the radio modem, you can add zener diodes or other spike arrestor circuits
for transient voltage protection. These should have a value of 20V and be placed on the supply side
of the regulator circuit. Refer to "Load specifications" on page 46 for more information.
Automotive supplies
If you plan to power the RIM 1902G or RIM 1802G from an automotive supply, you must take steps
to protect the radio modem from the intense power fluctuations that occur when an automobile
starts. You should use a circuit that consists of inductors, transorbs and voltage regulators to make
sure that the radio modem is protected from these power fluctuations.
Commonly, in automotive applications, voltages can be as high as 70V, especially on startup.
Commercial automotive adapters are available that safely convert the 12V automotive supply to a
regulated supply suitable for operating the radio modem.
48 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Chapter 6
Interface specification
This section provides information on the following topics:
• RIM 1902G or RIM 1802G interface
• AT Commands
•SIM interface pins
• Radio interface pins
• Turning on and turning off the radio
• Loading firmware (optional)
Page 50
Chapter 6: Interface specification
RIM 1902G or RIM 1802G interface
The asynchronous serial interface on the RIM 1902G or RIM 1802G operates at 3V, which means that
it is compatible with many existing system designs.
The radio modem can be controlled by a wide variety of microcontrollers and microprocessors, such
as the Intel 8051 or 80386, or Motorola 68000. In most cases, the RIM 1902G or RIM 1802G can be
connected directly to a microcontroller, or through a Universal Asynchronous Receiver/Transmitter
(UART) to a microprocessor data bus. If the radio modem is connected directly to a computer or
other RS-232 device, an interface must be provided to convert the signal voltage to the higher values
required.
The RIM 1902G or RIM 1802G is compliant with GSM Phase 2/2+ specifications. For detailed
information on the AT command structure, refer to the
included in the Integrator Kit.
AT Command Reference Guide
, which is
AT Commands
Command Description
V.25ter The V.25ter commands correspond to the basic commands of AT Hayes-compatible modems
applicable for GSM 07.07. These commands include answering incoming calls, switching
modes, and redialing.
GSM 07.07 The GSM 07.07 commands are used to remotely control GSM functionality, including phone
book functionality. These commands include selecting bearer service types, entering PINs,
and changing passwords.
GSM 07.05 for SMS The GSM 07.05 commands are used to perform operations related to short message service
(SMS) and and cell broadcast service (CBS) for both text and protocol data unit (PDU) modes.
These commands include deleting, transmitting, and saving SMS messages.
GSM 07.07 for GPRS The GSM 07.07 for GPRS AT commands are required for all GPRS functionality, including PDP
context definitions and activations, quality of service (QoS) definitions and requests for GPRS
attaches and detaches, PDP address retrieval, GPRS mobile station class retrieval, event
reporting, network registration status retrieval, and SMS.
50 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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SIM interface pins
SIM interface pins
Note: The SIM interface pins only appear on models with off-board SIM cards.
This section describes the purpose of each of the 6 lines that comprise the SIM interface to the RIM
1902G or RIM 1802G, with the off-board SIM card configuration. All SIM interface lines are 3V. The
RIM 1902G or RIM 1802G software polls the SIM card to confirm its presence.
Note: For proper operation, the SIM connector cable should be no more than 10 cm long.
The VPP line on the SIM card connector can be shorted with the VCC line to continue proper operation.
Pin Description
1 VCC.
This line supplies the SIM card with power. Verify that it leads to the VCC pin of the SIM card connector.
It might be necessary to filter noise on the line to prevent a fault from occurring. Refer to the following
diagram for an example.
2Reset.
3Clock.
4Input/Output.
5SIM Detect.
6Ground.
This is an output from the radio. Verify that it leads to the reset pin of the SIM card connector.
This is an output from the radio. Verify that it leads to the clock pin of the SIM card connector.
This is a two-way line between the SIM card connector and the RIM 1902G or RIM 1802G. Verify that it
leads to the I/O pin of the SIM card connector.
The active state of this line is high. This line should be asserted so that the radio modem can detect the
SIM card.
This is an input to the radio. Short this line to the GND pin of the SIM card connector.
The following diagram shows an example of how the SIM was incorporated onto the RIM Interface
and Test Board:
Integrator Guide 51
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Chapter 6: Interface specification
SIM Interface and Test Board integration
Radio interface pins
This section describes the purpose of each of the 22 lines that comprise the radio interface to the RIM
OEM Radio Modem for GSM/GPRS Wireless Networks.
Pins 1 to 4
Pins 1 to 4 were introduced to take advantage of the GPRS data network’s underlying GSM voice
infrastructure. The differential nature of the analog lines provides high voice quality and noise
immunity.
Pins 5 to 22
Input and output lines from pins 5 to 22 are 3V; however, they can also drive 3.3V systems.
All digital outputs will source a short circuit current of 3 mA. Digital inputs have a current leakage
of 1 mA.
Serial port
The serial port uses pins 20 and 21 to transmit and receive AT commands and data between the
radio modem and the computing device.
52 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Pin descriptions
Note: The symbol ~ before the label indicates that line is an active low digital signal.
Pin Label Description
Radio interface pins
1 MIC N Analog Microphone Input Negative
2 MIC P Analog Microphone Input Positive
3 SPK N Analog Speaker Negative
4 SPK P Analog Speaker Positive
5 AGND Analog Ground
6COV Coverage
7, 8 — Power supply
9GND Ground
This is an analog input to the radio.
This is an analog input to the radio.
This is an analog ground for the radio.
This line is a digital output from the radio.
The active state of this line is high and indicates that the radio modem is in network coverage,
as determined by the presence of a signal from the network base station.
When the radio modem does not have contact with the wireless network, this line is low.
An AT command is available to change the function of this pin, causing it to be asserted high
when the radio is GPRS-attached.
These pins supply power to the radio. Because the current requirement during transmission
exceeds the current rating of a single line, both lines 7 and 8 should be connected to the
power supply. Supplying power to these two lines enables the radio to turn on.
This line should be tied to the system ground of the computing device for proper operation.
Pin 18 should also be connected to a grounded source.
10 TURNON Turn Radio On
This line is an input to the radio.
This line turns on the radio unit. It is a digital signal that eliminates the need for an on/off
switch for the power supply to the radio modem. This is a 3V input to the radio, and is not 5V
tolerant.
Refer to "Turning on and turning off the radio" on page 57 for more information.
Integrator Guide 53
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Chapter 6: Interface specification
Pin Label Description
11 ONI On Indicate
12 TRI Transmit Indicate
13 TX2 Secondary Transmit
14 ~RI ~Ring Indicate
15 ~CTS ~Clear To Send
This line is a digital output from the radio that indicates that the radio is on and operational.
This line can be used by a computing device to qualify the handshaking outputs on the serial
interface. If CTS is low, and ONI is high, the unit is ready to receive data, but if CTS is low and
ONI is low, the radio modem is not ready to receive data because it is off.
When ONI is low, all inputs to the radio modem should be low or disconnected. Otherwise,
power is consumed and wasted.
The active (radio transmitting) state of this line is high.
This output from the radio modem is asserted while the radio is transmitting a packet to the
network base station. TRI has a built-in current limiter that enables it to directly drive an LED ,
which provides real-time visual feedback that the radio is transmitting packets. If this is not
necessary, you can leave the line disconnected.
This line supplies 3 mA to a standard LED, and is short-circuit protected. This line is low when
the radio modem is off.
This line is an input to the radio modem (for RIM internal use only).
This line is an output from the radio modem. It indicates an incoming call on the serial line.
When
~DTR
data waiting for the computing device. The radio modem does not transfer the data until
~DTR
the radio modem needs to communicate with it. If
radio modem has data to send the computing device,
This line is a digital output from the radio modem to the computing device. The active (clear
to send) state of this line is low.
When asserted low by the radio modem, this line indicates that it is ready to receive data from
the computing device. While this line is high, any data sent from the computing device to the
RIM 1902G or RIM 1802G may be lost. This line is a flow control mechanism that is normally
reacted to by the UART in your serial communication system. If you do not plan to use it, leave
~CTS
is not asserted (high), the radio modem asserts
is asserted (low). This line can be used to wake up a suspended computing device when
disconnected.
~RI
(low) to indicate that it has
~DTR
is already asserted (low) when the
~RI
is not asserted.
54 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Pin Label Description
Radio interface pins
16 ~RTS ~Request To Send
17 ~DSR ~Data Set Ready
18 GND Ground
19 ~DTR ~Data Terminal Ready
This line is an input to the radio modem. The active, request to send, state of this line is low.
This line should be asserted low by the computing device to indicate that it is ready to receive
data from the radio modem. This is a flow control mechanism that is normally handled by the
UART in your serial communication system. If you do not connect this line to your UART, it
must be tied low so that it is permanently asserted and enables communication.
If your device buffer overflows, it should set RTS inactive to signal the radio modem to pause
sending data. There might be a 16-byte overrun after the RTS line is made inactive, so your
device should set RTS inactive at least 16 bytes before any critical buffer overflows.
This line is a digital output from the radio modem.
The active, data set ready (DSR), state of this line is low. Your computing device can use DSR
as a confirmation that the radio modem knows the state of the terminal.
This line should be tied to the system ground of the host unit. Pin 9 should also be connected
to ground.
This line is a digital input to the radio.
The active, data terminal ready (DTR), state of this line is low, and indicates that the computing
device is ready to receive data from the radio modem. De-asserting this line high turns
communication off; the radio modem does not attempt to deliver data to the computing
device until ~DTR is again asserted low. Deasserting ~DTR also reduces power consumption
significantly even with the radio on.
If you do not intend to use ~DTR, tie it to ground so that it is always asserted during radio
modem operation.
This line should be deasserted when the radio modem is off. Driving ~DTR low when the radio
modem is off consumes unnecessary power.
Integrator Guide 55
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Chapter 6: Interface specification
Pin Label Description
20 TX Transmitted data
21 RX Received data
22 RX2 Secondary Receive
Warning: All unused inputs to the radio should be tied to ground, and any unused outputs from the radio
should be left disconnected.
This is an input to the radio modem. Its idle (no serial transmit activity) state is high.
This line is an asynchronous serial input to the radio modem, and should be connected to the
host terminal's transmit data output. This line carries data at a maximum of 115 200 bps.
Parameters are 8 bits, No parity, 1 stop bit. This baud rate can be changed using the
AT+IPR=<rate>
This line is an output from the radio modem. Its idle (no serial receive activity) state is high.
This line is an asynchronous serial output from the radio modem, and should be connected to
the host terminal’s receive data input. This line carries data at at a maximum of 115 200 bps.
Parameters are 8 bits, No parity, 1 stop bit. The baud rate can be changed using the
AT+IPR=<rate>
This line is an output from the radio modem (for RIM internal use only).
AT command.
AT command.
56 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
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Turning on and turning off the radio
Turning on and turning off the radio
To determine the current state of the radio, observe the ONI line. If ONI is high, the radio is on or is
in the process of turning off. If ONI is low, the radio is off or in the process of turning on. The
TURNON pin is a digital signal that turns the radio on and off. It eliminates the need for a power
switch across the power supply to the radio.
Turning on the radio
You can turn on the radio modem on by setting TURNON to high.
During the radio modem’s startup procedure, which can take several seconds, all changes to
TURNON are ignored by the operating system. If the radio fails to respond to a high TURNON line,
the radio might require service or the power supplied to the radio might be too low for proper
operation.
Do not use TURNON to indicate radio status. ONI must be used as the indicator of the radio status.
It is possible for the radio to be off even though TURNON is asserted. In this case, you can turn on
the radio by setting TURNON low and then high again.
Turning off the radio
The RIM 1902G or RIM 1802G requires a controlled shutdown. You can turn the radio modem off by
de-asserting
Data that has been received by the radio modem from the network, but has not been transferred to
the computing device, is not saved. The data is discarded when the radio modem turns off.
When the radio modem turns off, which can take several seconds, all changes to
by the operating system. To make sure that power consumption is reduced to the lowest possible
levels and sleep mode is achieved, all inputs to the radio should be inactive when the radio is turned
off. In particular, pin 19 (~DTR) should be inactive (3V).
Do not use the
possible for the radio to be on even though
radio by setting
If the application is very power constrained, you only need to remove power from pins 7 and 8.
TURNON
TURNON
TURNON
.
state to indicate radio status.
TURNON
high and then low again.
TURNON
are ignored
ONI
must be used to indicate radio status. It is
is de-asserted. In this case, you can turn off the
Integrator Guide 57
Page 58
Chapter 6: Interface specification
Resetting the radio
RIM recommends that you incorporate a method to remove power from pins 7 and 8 on the radio
modem during the development and prototype phase. This enables the device to perform a hard
reset of the radio modem, which can be useful in some debugging testing situations.
Loading firmware (optional)
RIM firmware controls the operation of the radio modem. RIM is committed to the quality of its
firmware, and might periodically make improvements or optimizations to it. The radio modem is
designed so that loading revised firmware is not required; two RIM GPRS radio modems with
different firmware revisions are always able to communicate with each other, and with the same
fixed servers, through the wireless network. Nevertheless, you might choose to design your
application in such a way that allows the RIM firmware to be updated after your product is
deployed in the field.
Because of its large size, firmware cannot be updated wirelessly. If you decide to implement the
ability to update the firmware after the radio modem is deployed, RIM can provide a command-line
programming utility that loads firmware into the radio modem. If your device is not based on a
command prompt, the programming utility must reside on a computer that is connected through its
COM port to the radio modem’s RX and TX lines. This means that the RX and TX lines are brought
out to an external connector, and a switch is required to select whether the radio modem is
connected to your processor or to the external programming computer. Other lines that are required
during reprogramming are DTR (must be asserted low) and GND.
This external serial port can also be useful for FCC certification testing, and RIM highly
recommends that this be incorporated into at least one device that is designated for testing
purposes.
58 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 59
Chapter 7
Antenna selection
This section provides information on the following topics:
• Antenna terminology
• Selecting an antenna
• Antenna requirements
• Antenna design considerations
•Shielding
Page 60
Chapter 7: Antenna selection
Antenna termin ology
This section introduces some of the terminology that is used to describe antennas, and expands on
the summary of antenna requirements that are described below (refer to page 62).
Gain and ERP
Antennas produce gain by concentrating radiated energy in certain areas, and radiating less energy
in other directions. The amount of gain depends on the radiation pattern, antenna match, and
antenna efficiency. Antenna gain is given as a rating of the maximum increase in radiated field
energy density relative to a dipole antenna, expressed in decibels of power gain (dBd).
A dipole is a balanced antenna consisting of two radiators that are each a quarter-wavelength,
making a total of a half-wavelength. The widespread use of half-wave dipole antennas at very high
frequency (VHF) and ultra high frequency (UHF) has led to the use of a half-wave dipole as the
reference element.
At the antenna port, the output power of the RIM 1902G or RIM 1802G can be as high as 1W at
1900 MHz and 1800 MHz, 0.8W at 850 MHz, or 2W at900 MHz. The antenna gain (or loss) results in
an increase (or decrease) in this value. The actual output from the antenna is called the effective
radiated power (ERP). For example, if the radio modem delivers 2W of power to a 2.3 dBd gain
antenna, the ERP is 2.0 × 10^((2.3 ÷10) = 3.4W, the actual power radiated by the antenna in the
direction of maximum gain and polarization.
Impedance matching, return loss, and VSWR
The antenna, cables, and connectors in a radio frequency system must all possess the same
impedance. The impedance required by the RIM 1902G or RIM 1802G is 50 ohm, which is a widely
available industry standard. Any deviation from this value might result in impedance mismatch
and signal loss.
Impedance mismatch can also be caused by cable connections, cable lengths, and imperfections in
the cables and connectors. The mismatch causes some of the radio frequency energy to be reflected
from the mismatch location. This reflection interferes with the signal and reduces its amplitude,
which results in power loss.
Antenna mismatch can be expressed as a return loss (RL), which is the ratio of reflected power to the
incident power, expressed in decibels.
P
RL =×
1010log
Return Loss equation
60 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
reflected
output
P
Page 61
Selecting an antenna
The voltage standing wave ratio (VSWR) is another way to express the ratio of incident power (from
the radio modem) to reflected power (into the radio modem).
P
reflected
+1
P
VSWR =
1 -
VSWR equation
VSWR=1 or RL=-∞ dB is a perfect match. In practice, imperfections are inevitable, which means
that VSWR is greater than 1 and RL is a negative number.
VSWR and RL normally vary as a function of frequency.
output
P
reflected
P
output
Antenna size
The optimal antenna radiation efficiency is produced by an antenna measuring one wavelength, l.
The value of l for the RIM 1902G or RIM 1802G is calculated by dividing the speed of light c = 3 x 10
m/s by the center frequency.
Antenna lengths of λ/2, λ/4, and λ/8 also work well, and usually result in a relatively well-matched
antenna. λ/2 or λ/4 can be electrically “shortened” by adding load matching elements to control the
antenna match. However, this shortening reduces the antenna efficiency and, therefore, the effective
radiated power.
Selecting an antenna
The antenna is one of the most important components of a wireless communication system. The
proper antenna maximizes the coverage area of the RIM 1902G or RIM 1802G.
The antenna that you choose should suit your project’s needs. There are many different antenna
types and options that can meet your engineering and user requirements and remain within budget
constraints. RIM strongly recommends that you use an experienced antenna provider to realize the
highest gain possible. A well-designed antenna solution can maximize your application’s efficiency,
coverage area, and battery life.
Antenna manufacturers have designed and manufactured a wide variety of antennas for use on the
GPRS network and for other radio frequency (RF) systems that operate in the same frequency range.
RIM does not recommend specific antennas because the choice of antenna is application-dependent.
8
Integrator Guide 61
Page 62
Chapter 7: Antenna selection
An antenna’s performance depends on its configuration and environment; the same antenna
behaves differently from device to device, even if these devices use the same RIM radio modem. For
example, a magmount antenna might be suitable for some applications, because it includes a
magnetic base that clamps the antenna onto a metal surface. This surface is called a ground plane,
and it reflects electromagnetic radiation that would otherwise be lost to the antenna. This reflection
effectively doubles the length of the antenna by creating a virtual “mirror image” of the antenna
beneath the plane.
Antenna requirements
The antenna system that is used with the RIM 1902G or RIM 1802G has the following minimum
requirements:
• For the RIM 1902G or RIM 1802G hardware integration to be fully compatible with the
RIM 902M™ and RIM 802D™ radio modems, the antenna must be modular.
• GPRS has several frequency bands, 1900, 1800, 900, and 850, each of which requires its own
antenna.
• GPRS, Mobitex, and DataTAC networks have different center frequencies. If the same antenna is
used for all three networks, receiver sensitivity is reduced. Contact the RIM OEM Integration
Specialist team for more information on backward compatibility.
• The RIM 1902G or RIM 1802G requires an impedance of 50 ohm.
Antenna design considerations
Proper antenna positioning maximizes the gain provided by the antenna. When you determine the
proper antenna position, consider the environment in which the device will be used. Physical
devices can vary significantly, and incorporating the antenna is an integral part of a successful
design.
When you are designing an antenna, you should consider the following issues:
• vertical polarization
• proximity to active electronics
• transmit interference
• device position
• antenna cable
62 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 63
Antenna design considerations
Vertical polarization
Because the GPRS network is based on a vertically polarized radio-frequency transmission, the
application’s antenna should be oriented vertically and upward when the radio modem is in use. In
small, handheld devices, a user-friendly design enables the antenna to be folded out of the way
when it is not in use.
Proximity to active electronics
You should position the antenna as far from the computing device’s active electronics as possible.
Metal construction in a computing device’s case and internal components may attenuate the signal
in certain directions, which reduces the radio modem’s sensitivity and transmit performance when
the computing device is held or oriented in certain ways. Using metal in the construction of a
ground plane for an antenna can significantly improve the antenna gain and the system’s coverage.
Transmission interference
To prevent interference from the antenna into the radio modem during transmission, the antenna
must be placed a minimum of 2 cm (0.8”) away from the radio modem. For best performance, the
antenna should be placed more than 5 cm (2”) away from the radio modem.
Device position
If the computing device is designed to sit on a surface, the antenna should be as far from the bottom
of the device as possible. This reduces radio frequency (RF) reflections when the device is placed on
a metal surface.
When the computing device is handheld or is worn next to the user’s body, the antenna should be
positioned to radiate away from the body. Otherwise, the body absorbs the radiated energy and the
effective coverage area of the radio is reduced. Positioning the antenna away from the body also
helps the device meet the FCC RF exposure (SAR/MPE) requirements.
Antenna cable
For best results, the antenna should be connected directly to the antenna cable. If you require an
extension cable, it should be low loss, as short as possible, and have an impedance of 50 ohms. You
must use a proper matching connector, because each connector in the signal path introduces a
return loss and reduces performance.
Integrator Guide 63
Page 64
Chapter 7: Antenna selection
Shielding
The RIM 1902G or RIM 1802G electrical design provides high immunity to radio frequency (RF)
noise, also called electromagnetic interference (EMI). The metal casing also acts as a shield that helps
to minimize the effect of RF interference that originates in the computing device to which it is
attached. The metal casing also prevents the RIM 1902G or RIM 1802G from emitting RF energy into
the computing device and disrupting the computing device’s operation.
Consequently, you do not need to provide any additional RF shielding between the radio modem
and a computing device, unless the environment contains an extreme level of RF noise. In fact,
additional RF shielding is less important than making sure that the radio modem’s power supply is
free of high-frequency electrical noise.
The antenna must be positioned so that the radiated energy is directed away from the computing
device. If your application does not permit this positioning, RF shielding might be required between
the antenna and the computing device.
Note: Circuits with a high impedance, and sensitive analog circuits, are especially vulnerable to nearby radio
frequency emissions, and might need to be shielded. Circuits such as cathode ray tubes (CRTs) and LCD display
drivers are most often affected.
64 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 65
Chapter 8
Specifications
This section provides information on the following topics:
• Power supply and typical current usage
•RF properties
• Serial communications
• Mechanical and environmental properties
•Audio
• Gain setting
• Frequency response (voiceband filter)
• Input/output impedance
• Signal to (noise + distortion) ratio
Page 66
Chapter 8: Specifications
Power supply and typical current usage
Power supp ly
Operating range
Transmit mode
single power supply
3.5 to 4.75V DC
up to 2.2A (at 4.2V, output 1W)
RF properties
RIM 1902G RIM 1802G
Transmit fr equency
Transmit power
Receive frequency
Receiver sensitivity
Multislot class
Note: As defined in the GSM specifications, the radio modem’s transmitter can reduce output power when it is
near a base station.
1850 - 1910 MHz
824 - 849 MHz
1W at 1900 MHz
0.8W at 850 MHz
1930 - 1990 MHz
869 - 894 MHz
-107 dBm (typically)
2.2439% BER
88
1710 - 1785 MHz
880 - 915 MHz
1W at 1800 MHz
2W at 900 MHz
1805 - 1880 MHz
925 - 960 MHz
-107 dBm (typically)
2.2439% BER
Serial communications
Serial ports
Link speed
66 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
3V asynchronous
1200 to 115 200 bps
Page 67
Mechanical and environmental properties
Weight
Dimensions
Thickness
3V interface connectors
Antenna cable connector
Casing
Recommended
operating temperature
Recommended storage
temperature
36 g (1.23 oz), including case
42.0 by 67.5 mm (1.65" x 2.66")
8.4 mm (.33")
22 pin Flexible Printed Circuit (FPC) connector
6 pin FPC connector (on-board SIM configuration only)
MMCX
metal
-30°C to +75°C (at 5-95% relative humidity, non-condensing)
-40°C to +85°C
Audio
The radio modem does not support the following functionality:
• automatic gain control (your design should include noise suppression)
• hands-free operation
• echo cancellation
Gain setting
Uplink
Downlink
0 to 22.5 dB in step of 1.5 dB
-36 to 9 dB in step of 1.5 dB
Integrator Guide 67
Page 68
Chapter 8: Specifications
Frequency response (voiceband filter)
0 -100 Hz max of -34 dB
200 Hz typ of -1.1
300 - 3350 Hz
3400 Hz typ of -0.7 dB
4000 Hz typ of -39 dB
>=4400 Hz -75 dB
Group
delay
500 - 2500Hz
Input/output impedance
Input
Output
124 kohm
minimum
maximum
330 ohm (single-ended)
15 ohm (differential)
470 pF (single-ended)
100 pF (differential)
Signal to (noise + distortion) ratio
Voiceband ADC
minimum 69 dB (PGA=0dB)
typical 77 dB
min -0.2 dB
max 0.1 dB
min 300
µ
max 600 µ
Voiceband DAC
minimum 47 dB (PGA=0dB)
68 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Page 69
Index
Numbers
22-pin interface cable
connecting
illustration
6-pin connector
illustration
6-pin interface cable
connecting
, 29, 34
, 29, 35
, 34
, 33
A
AC outlet
connecting the test board
adhesive, industrial
AGND pin
alkaline batteries
amplitude
antenna
, 53
, 60
, 62
cable
, 42, 62, 63
connectors
device position
distance from radio modem
, 60
ERP
extension cables
, 60, 63
gain
ground plane
impedance
introduction to terminology
magmount
matching
MMCX connector
modularity
orientation
position
positioning
proximity to active electronics
, 41
, 48
, 42
, 62
, 63
, 62
, 60
, 62
, 61
, 31, 36, 42
, 62
, 63
, 63
, 31, 36, 62
, 31, 36
, 63
, 60
, 63
radiation efficiency
return loss
RF exposure requirements
selecting
shielding
size
SMA plug
transmission interference
transmit interference
vertical polarization
VSWR
antenna development, overview
arrestor circuits
AT commands
attenuation
audio
frequency response
gain setting
input/output impedance
signal to (noise + distortion)
specifications
automotive supplies
adapters
power fluctuations
, 60
, 61
, 64
, 61
, 31, 36, 42
, 60
, 48
, 50
, 63
, 67
, 48
, 61
, 62
, 63
, 62, 63
, 68
, 68
, 67
, 48
B
batteries
alkaline
conserving power
equivalent series resistance (ESR)
nickel cadmium
overview
recommended
single-use
bolts
, 39
, 48
, 17
, 47
, 47
, 48
, 48
, 63
, 22
, 68
, 47
Integrator Guide 69
Page 70
Index
C
cable
antenna
radio interface
serial
SIM interface
certification
FCC
Industry Canada
Class B compliance
Clock SIM interface pin
compliance
Class B
FCC statement
contacting RIM
COV pin
coverage, antenna positioning
CTS pin
, 63
, 41
, 41
, 42
, 4
, 5
, 5
, 51
, 5
, 4
, 20
, 53
, 31, 36
, 54
D
development process
antenna development
field trials
power supply development
printed circuit board development
software development
development process, overview
DSR pin
DTR pin
, 23
, 55
, 55, 58
, 22
, 23
, 22
, 21
E
effective radiated power (ERP), 60
environmental properties
specifications
equations
return loss
voltage standing wave ratio (WSWR)
equivalent series resistance (ESR)
, 67
, 60
F
FCC
, 47
, 23
, 61
compliance statement
interference requirements
field trials, overview
firmware, loading
FPC cable
frequency response, specifications
, 41
, 58
, 4
, 4
, 23
, 68
G
gain, 63
gain setting
specifications
General Packet Radio Service
Global System for Mobile Communication
GND pin
GPRS radio modem
Ground SIM interface pin
GSM
, 53, 55, 58
batteries
bottom casing
GSM compliance
integration overview
integration possibilities
MMCX jack
mounting methods
noise immunity
power requirements
power supply parameters
radio interface
receiver sensitivity
serial interface
single board design
, 17
size
specifications
transmitter
, 14
, 67
, 14
, 47
, 41
, 50
, 38
, 15
, 31, 36
, 39, 40, 41
, 16
, 46, 47
, 46
, 52
, 16
, 50
, 17
, 66
, 17
, 51
H
headset
connecting
, 32, 36
I
illustrations
, 14
70 RIM OEM Radio Modem for GSM/GPRS Networks
Page 71
Index
22-pin interface cable, 29, 35
6-pin connector
antenna MMCX connector
radio modem underside
SIM test board integration
SMA connector
impedance
industrial adhesive
Industry Canada
input/output impedance, specifications
Input/Output, SIM interface pin
integration
integration process
Integrator Kit
interface
interface and test board
interface cable
interference
, 60
certification
Class B compliance
GPRS radio modem
illustrated
overview
process overview
antenna development
field trials
power supply development
printed circuit board development
software development
content
, 22
overview
connecting to
test board
components
set up overview (off-board SIM)
set up overview (on-board SIM)
, 29, 34
22-pin
6-pin
, 33
SIM
, 42
FCC requirements
shielding
, 34
, 31, 36
, 34
, 52
, 31, 36
, 41
, 5
, 5
, 51
, 15
, 21
, 38
, 21
, 22
, 23
, 23
, 22
, 20
, 41
, 27
, 26
, 32
, 27
, 4
, 64
, 68
, 23
L
LED indicators, 27
loading, firmware
, 58
M
magmount antenna, 31, 36
mechanical properties
specifications
MIC N pin
MIC P pin
microphone/speaker jack
minimum requirements
MMCX connector
mounting methods
, 53
illustrated
, 39
bolts
hole pattern
overview
permanent industrial adhesive
standoffs
tie wraps
, 67
, 53
, 27
, 62
, 42
, 31, 36
, 39
, 39
, 41
, 39
, 40
N
network coverage, antenna positioning, 31, 36
networks
GPRS
, 14
, 14
GSM
nickel cadmium batteries
noise immunity
noise shielding
, 16
, 64
, 47
O
on/off switch, 26
ONI pin
, 54, 57
P
PCB development, 23
permanent industrial adhesive
pins
, 53
AGND
COV
, 53
, 41
Integrator Guide 71
Page 72
Index
CTS, 54
, 55
DSR
, 55, 58
DTR
, 53, 55, 58
GND
MIC N
, 53
, 53
MIC P
ONI
, 54, 57
power supply
radio interface
RI
, 54
RTS
, 55
, 56, 58
RX
RX2
, 54
SPK N
, 53
SPK P
TRI
, 54
TURNON
, 56, 58
TX
TX2
, 56
plug-in supplies
transient voltage protection
polarization
vertical
power
automotive supples
LC filter
minimum voltage
plug-in supplies
requirements
shunt capacity
source requirements
supply parameters
power supply
alkaline batteries
automotive supplies
development
load specifications
plug-in supply
specifications
test board
printed circuit board development
overview
, 53
, 53
, 53
, 53
, 48
, 63
, 48
, 46
, 46
, 48
, 46
, 46
, 47
, 46
, 48
, 48
, 23
, 46
, 48
, 66
, 27
, 23
R
radio coverage,maximizing, 17
radio interface cable
radio interface pins
AGND
, 53
, 53
COV
CTS
, 54
description
, 55
DSR
DTR
, 55, 58
GND
, 53, 55, 58
, 53
MIC N
MIC P
, 53
ONI
, 54, 57
power supply
RI
, 54
, 55
RTS
, 56, 58
RX
RX2
, 54
, 53
SPK N
, 53
SPK P
TRI
, 54
TURNON
, 56, 58
TX
TX2
, 56
radio modem
antenna requirements
distance of antenna to
, 14
models
resetting
specifications
turning off
turning on
radio signal
attenuation
receiver sensitivity
requirements, antenna
Reset SIM interface pin
resetting the radio modem
return loss
RF properties
, 60
equation
, 41
, 53
, 53
, 53
, 62
, 63
, 58
, 66
, 57
, 57
, 63
, 16
, 62
, 51
, 58
, 60
72 RIM OEM Radio Modem for GSM/GPRS Networks
Page 73
Index
specifications, 66
, 54
RI pin
RIM firmware
RIM GPRS Radio Modem
advantages
integration possibilities
models
overview
RIM, contacting
RS-232 interface
RTS pin
RX pin
RX2 pin
, 58
, 15
, 15
, 14
, 14
, 20
, 26
, 55
, 56, 58
, 54
S
serial cable, connecting to the test board, 29,
35
serial communications
interface
port
specifications
setting up the interface and test board (offboard SIM)
setting up the interface and test board (onboard SIM)
setting up the test board (off-board SIM)
setting up the test board (on-board SIM)
shielding
shutting down the radio modem
signal to (noise + distortion), specifications
signal to noise ratio
SIM card
activation
holder
inserting into holder
SIM interface pins
warning
SIM interface pins
Clock
Ground
Input/Output
Reset
, 50
, 52
, 66
, 32
, 27
, 32
, 27
, 64
, 57
, 68
, 68
, 20
, 27
, 30, 35
, 51
, 30, 35
, 51
, 51
, 51
, 51
VCC
, 51
SIM test board incorporation
SIM, interface cable
single board design
single-use batteries
size, GPRS radio modem
SMA connector
SMA plug
software development
specifications
SPK N pin
SPK P pin
standoffs
Subscriber Identity Module
support, contacting
, 31, 36, 42
audio
, 67
environmental properties
frequency response
gain setting
input/output impedance
mechanical properties
minimum voltage
noise immunity
power supply
receiver sensitivity
RF properties
serial communications
shielding
signal to (noise + distortion)
size
, 17
transmitter range
, 53
, 53
, 39
, 42
, 17
, 48
, 17
, 31, 36
, 22
, 68
, 67
, 67
, 46
, 16
, 66
, 16
, 66
, 16
, 17
, 20
T
test board
antenna
components
connecting the antenna
connecting the headset
connecting to AC outlet
connecting to the computer
output to computer
power switch
, 31, 36
, 26
, 26
, 31, 36
, 52
, 67
, 68
, 66
, 68
, 20
, 31, 36
, 32, 36
, 31, 36
, 29, 35
Integrator Guide 73
Page 74
Index
radio interface cable, 41
setup (off-board SIM)
setup (on-board SIM)
SIM interface cable
turning off
turning on
test board components
LED indicators
microphone/speaker jack
on/off switch
power supply
RS-232 interface
SIM card
test points
test points
tie wraps
transmit interference
transmitter, efficiency
TRI pin
, 54
, 31, 36
, 31, 36
, 27
, 26
, 27
, 26
, 27
, 26
, 26
, 40
, 63
, 17
, 42
, 32
, 27
, 27
turning off the radio modem, 57
turning on the radio modem
TURNON pin
TX pin
TX2 pin
, 53
, 56, 58
, 56
, 57
V
VCC pin, 51
voltage
minimum requirements
regulators
, 48
, 46
W
workflow, integration, 21
Z
zener diodes, 48
74 RIM OEM Radio Modem for GSM/GPRS Networks
Page 75
Page 76
© 2002 Research In Motion Limited
Published in Canada
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