The SAM3G User Guide
Document history
18th May 2007 : Start version 1.0
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1. Introduction
The SAM3G is a compact, light-weight, UMTS based modem. It provides GSM, GPRS, EDGE
and WCDMA connectivity.
-
-
GSM, GPRS, EDGE : 850MHz, 900MHz, 1800MHz, 1900MHz
UMTS, WCDMA/HSDPA : 850MHz, 1900MHz, 2100MHz
The SAM3G is designed for both mobile and fixed M2M applications. It has an RJ45 socket for
both input voltage and serial RS232 signals, a MiniB USB connector, a SMB-Jack for antenna
connection, a SIM holder and an LED indicator.
The SAM3G is capable of sending/receiving SMS, Circuit switched data and Packet-switched
data.
SMB-Jack antenna
connector
SIM holder
LED indicator
USB connector
RJ45 for power and serial RS232
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Australia / Asia Pacific Office
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Tel: +44 (0)8700 434040
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2. Safety Precautions
The following safety precautions must be observed whenever the SAM3G modem is in operation
or in service. Failure to comply with these precautions violates the safety standards of the design,
manufacture and intended use of the product
-
Switch off the SAM3G modem :
In hospitals or places where medical equipments may be in use.
In an aircraft
Refueling points
Explosive areas
-
Restricted use of the SAM3G modem
Near any chemical plant
Near any Fuel depot
Areas with mobile phone warning signs
Respect national regulations on the use of cellular devices. Road safety always comes first
The SAM3G modem receives and transmit radio frequency energy while switched on,
therefore interference can occur if the SAM3G is near TVs, radios, PCs or any inadequately
shielded equipments.
3. Radio frequency exposure - SAR
The SAM3G modem is a low-power transceiver, similar to a typical handheld GSM/GPRS/UMTS
mobile phone. When it is turned on, it will emit low-level radio frequency energy.
There are different guidelines and standards around the world that govern the permitted levels of
radio frequency exposure for general population. The levels include a safety margin to a human
body.
The Specific Absorption rate (SAR) is a measure of the rate at which radio frequency energy is
absorbed by the body when exposed to radio frequency electromagnetic field. The SAR value is
determined at the highest certified power level in the laboratory conditions, but the actual SAR
level of the transceiver while operating can be well below this value. This is because the
transceiver is designed to use minimum power to connect to the network.
The SAM3G modem is approved to use in applications where the antenna is placed more than
20cm from the body.
For other applications, the integrator is responsible for the local SAR requirements.
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Australia / Asia Pacific Office
Tel +61 (0)282 442 363
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Tel: +44 (0)8700 434040
Fax: +44 (0)8700 434045
4. WEEE directive 2002/96/EC, disposal of old electronic equipment
This symbol
on the product indicates that this product shall not be treated as
household waste . It must be placed at an appropriate collection point for the recycling of
electrical and electronic equipments.
By ensuring the correct disposal of this equipment, it will help the environment and human’s
health. The recycling will help to conserve the natural resources.
The SAM3G product is RoHS compliant
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Australia / Asia Pacific Office
Tel +61 (0)282 442 363
Fax +61 (0)294 751 278
USA / Canada Office
Tel +1-866-849-3441
Fax +1-866-628-8055
Tel: +44 (0)8700 434040
Fax: +44 (0)8700 434045
5. Packaging
The SAM3G package consists of :
-
-
-
-
A SAM3G modem
A data cable
A one-page Specification of the SAM and its pinouts
A SAM3G User Guide
The carton box diameter is 120mm x 95mm x 60mm
The Data cable is 2m long
The Label diameter is 50mm x 33mm
The Power supply is available on request. It is recommended that the SAM3G is powered using a
12Vdc/1A power supply.
The Antenna is also availableon request. Make sure the correct antenna is used to get optimised
performance from the SAM3G.
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Australia / Asia Pacific Office
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Tel: +44 (0)8700 434040
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6. Functionality
a. General
The SAM3G modem consists of an RJ45 connector for serial port and input power, a miniB USB
connector, an SMB Jack antenna connector and a SIM holder. The LED indicator, located on top,
indicates the SAM operating status.
SMB connector
LED Indicator
MiniB
USB
Connector
Switching
Power
Supply
3G ENGINE
RJ45
Socket
uController
RS232
Serial Data
Interface
SIM Interface
The SAM3G Functional Block Diagram
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b. The RJ45 socket
Pin
Signals
Description
1
2
3
4
5
6
7
8
VIN
DCD
N/U
GND
RXD
TXD
RTS
CTS
Input voltage 5Vdc - 32Vdc
Data Carrier Detect
Not used
Common Ground
Serial Data out of the SAM
Serial Data into the SAM
Ready to Send
Clear to Send
c. The MiniB USB connector
Pin Signal
1 VIN
2 D-
3 D+
4 N/C
5 GND
Important Note : RS232 and USB ports must not be connected/operated simultaneously
Pin5
Pin1
Pin8
Pin1
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d. The SMB-Jack 50Ω antenna connector
e. The USIM holder
To insert the SIM card, remove the door by sliding it back toward the end. Make sure
the SIM card faces the right way as indicated on the box. Voltage levels over this USIM interface
complies with 3GPP standards
f. The LED status
The LED indication has the following status :
-
-
-
-
LED on steady : The SAM3G is on and connected, but not transmitting/receiving data
LED flashes slowly : The SAM3G is on and searching for network connection
LED flashes intermittently : The SAM3G is in use (transmit/receive data)
LED is off : No power
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g. The data cable
The data cable is 2m long. It consists of an RJ45 plug, a DB9-female connector and a 2-wire
input power.
5
4
3
2
1
9
8
7
6
DB9
Signals
RJ45 Description
1
2
3
4
5
6
7
8
9
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
2
5
6
3
4
Data Carrier Detect
Serial Data out of the SAM3G
Serial Data into the SAM3G
Not used
Common Ground
7
8
Ready to Send
Clear to Send
1
4
RED wire : Input voltage from 5Vdc to 32Vdc
BLACK wire : Power Ground
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7. Electrical characteristics
a. Power consumption
Vin = 12Vdc HSDPA/WCDMA
Low Power mode 4mA
GSM/GPRS/EDGE
4mA
Normal mode
90mA
80mA
@ 0dBm Tx power
@ 15dBm Tx power
@ 21dBm Tx power
151mA
200mA
250mA
-
-
-
Maximum peak
500mA
@ 5dBm Tx power
@ 13dBm Tx power
@ 33dBm Tx power
-
-
-
151mA
130mA
170mA
Maximum peak
-
830mA
b. RF bands
GSM850 :
Tx = 824MHz - 849MHz, Rx = 869MHz - 894MHz
Tx = 880MHz - 915MHz, Rx = 925MHz - 960MHz
Tx = 1710MHz - 1785MHz, Rx = 1805MHz - 1880MHz
Tx = 1850MHz - 1910MHz, Rx = 1930MHz - 1990MHz
Tx = 1920MHz - 1980MHz, Rx = 2110MHz - 2170MHz
Tx = 1850MHz - 1910MHz, Rx = 1930MHz - 1990MHz
Tx = 824MHz - 849MHz, Rx = 869MHz - 894MHz
EGSM900 :
DCS1800 :
PCS1900 :
UMTS2100 :
UMTS1900 :
UMTS850 :
c. Receive sensitivity
Band
Typical Rx Sensitivity Maximum Rx Sensitivity
(dBm)
(dBm)
GSM850 (2% ber) CS
EGSM900 (2% ber) CS
DCS1800 (2% ber) CS
PCS1900 (2% ber) CS
UMTS2100(.1% ber) 12.2Kbps
UMTS1900(.1% ber) 12.2Kbps
UMTS850(.1% ber) 12.2Kbps
-107.5
-107.5
-106.5
-106.5
-110.5
-110.5
-110.5
-106
-106
-105
-105
-109
-109
-110
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d. Conducted Transmit Power tolerances
Parameter
Conducted Tx Power
Note
GSM850 & GSM900 CS
DCS1800 & PCS1900 CS
+32dBm ±1dBm
+27dBm ±1dBm
GMSK mode, connectorized (Cl.4)
8PSK mode, connectorized (Cl.E2)
+29dBm ±1dBm
+626Bm ±1dBm
GMSK mode, connectorized (Cl.1)
8PSK mode, connectorized (Cl.E2)
UMTS1900 & 850 12.2Kbps
UMTS2100 12.2Kbps
+23dBm ±1dBm
+23dBm ±1dBm
connectorized (Cl.3)
connectorized (Cl.3)
e. Main antenna specifications
Frequency band
Network type
VSWR test frequency
(MHz)
(MHz)
824-894
GSM,GPRS,EDGE,UMTS
CDMA
Low : 824
Mid : 859
High : 894
880-960
GSM,GPRS,EDGE
GSM,GPRS,EDGE
Low : 880
Mid : 920
High : 960
1710-1880
1850-1990
1920-2170
Low : 1710
Mid : 1795
High : 1880
GSM,GPRS,EDGE,UMTS
CDMA
Low : 1850
Mid : 1920
High : 1990
UMTS
(Tx : 1920-1980)
Low : 1920
Mid : 1950
High : 1980
(Rx : 2110-2170)
Mid : 2110
Mid : 2140
Mid : 2170
The maximum antenna gain recommended, for consideration against RF exposure and
ERP/EIRP limits, is :
-
-
In Cellular band : 8dBi
In PCS band : 4dBi
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Tel +1-866-849-3441
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8. Operation
The SAM3G can support either the USB port or the Serial RS232 port. The port
configuration is done at the point of sale. Do not operate these 2 ports at the same time !
8.1 Using the USB port
a. Installing the USB driver
Note : If the old driver version has been installed, it must be removed, before installing the latest
driver. To uninstall the old driver, follow these steps :
-
-
-
-
-
-
-
Open the Control Panel
Double click System, System Properties window appears
Select the Hardware tab
Select the Device Manager
Expand the Universal Serial Bus controllers to show the installed devices.
Right click the Sierra Wireless MC87xx device entry and choose Uninstall.
Click OK to confirm.
Step1 : Locate and run the DriverInstaller.exe . Note that there is no feedback, just wait a few
moments for the program to run.
Step2 : Connect the SAM3G to the PC, using the supplied USB cable. Several Found New
Hardware balloons appear above the tool tray as the system detects the new devices. After the
devices are detected, the Device Manager will show, in the following categories :
-
-
Network Adapters : Sierra Wireless HSDPA Network adapter.
Port (COM&LPT) :
Sierra Wireless AT Command port (UMTS)
Sierra Wireless CNS port (UMTS)
Sierra Wireless Data Port (UMTS)
Sierra Wireless DM Port (UMTS)
-
Universal Serial Bus Controllers : Sierra Wireless MC87xx device
b. Installing the 3G_Watcher
Note : If the old Watcher has been installed, it must be removed before installing the latest
Watcher. To uninstall the old Watcher, follow these steps :
-
-
-
-
Open the Control Panel
Double-click Add or Remove programs
Select Sierra Wireless 3G Watcher
Click Change/Remove
Step 1 : Run the 3G_Watcher.exe, the 3G_Watcher welcome-window, appears, click Next
Step 2 : Select Australia region, click Next
Step 3 : Select “ I accept the terms in the license agreement” , click Next
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Step 4 : Use the default folder, click Next
Step 5 : Click Install, then Finish
c. Connection
Connect the SAM3G to the PC using the supplied USB cable. After connection, the PC will
automatically detect the SAM3G and run the 3G_Watcher.
To set up the data profile, go to the “Tools” option, select “Connections” -> “Profile” then enter
Profile name, User name, Password, Access Point Name (APN) and Connection type. PDP type
default is IP.
8.2 Using the Serial RS232 port
The SAM3G has 2 different configurations for the serial port : General configuration and Meter
configuration.
a. General configuration :
In this configuration, the SAM3G’s default terminal speed is 115200bps, data format is 1+8+1.
There are only 4 serial data signals supported, namely RXD, TXD, RTS and CTS.
b. Meter configuration :
In this configuration, the SAM3G will be controlled by an internal micro-controller, its default
terminal speed is 9600bps, 1+8+1. There are 5 serial data signals supported, namely RXD,TXD,
RTS,CTS and DCD.
c. Connection :
To test the serial port configuration, follow these steps :
-
-
-
-
Insert the USIM card into the SAM3G
Connect the Antenna
Connect the SAM3G to the PC’s COM port using the supplied serial cable (RJ45-DB9).
On the PC, run a terminal program, ex. HyperTerminal, set the program speed at either
115200bps, or 9600bps.
-
Connect the 12Vdc to the SAM3G Red+Black wires
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SAM3G typical connection to test the serial RS232 configuration
d. AT commands :
The SAM3G modem supports most of the AT commands specified in the following standards :
-
-
-
3GPP TS 27.005 : Control SMS functions for devices on GSM/WCDMA networks
3GPP TS27.007 : Control devices operating on GSM/WCDMA networks
ITU-T V.250 : Control serial communications over an asynchronous interface
For details of the AT commands, refer to the “Supported AT command reference” manual.
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