Omnitron Systems Technology SAM3G User Manual

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Document history

18th May 2007 : Start version 1.0

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1

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Contents

1. Introduction

2. Safety precautions

3. Radio frequency exposur

e - SAR

4. WEEE Directive 2002/96/EC - disposal of old electronic equipment

5. Packaging

6. Functionality

a. General
b. The RJ45 socket
c. The MiniB USB connector
d. The SMB-Jack 50Ω antenna connector
e. The USIM holder
f. The LED status
g. The Data cabl

e

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7. Electrical characteristics

a. Power consum
b. RF bands
c. Receive sensitivity
d. Conducted transmit power tolerances
e. Main antenna specifications

8. Operation

a. Using the USB port
b. Using the serial RS232 port

ption

2

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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.

SIM holder

SMB-Jack antenna
connector

LED indicator

USB connector RJ45 for pow

er and serial

RS232

3

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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 regulation

s 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 th

For other applica

e body.

tions, the integrator is responsible for the local SAR requirements.

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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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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

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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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The SAM3G F

unctional Block Diagram

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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

3G ENGINE

SIM Interface

Switching

Power

Supply

uController

RS232

Serial Data

Interface

MiniB

USB

Connector

RJ45

Socket

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b. The RJ45 socket

Pin Signals Description

1 VIN Input voltage 5Vdc - 32Vdc
2

DCD Data Carrier Detect
3 N/U Not used
4 GND Common Ground
5 RXD Serial Data out of the SAM
6 TXD Serial Data into the SAM
7 RTS Ready to Send
8 CTS Clear to Send

c. The MiniB USB connector

Pin Signal

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1 VIN
2 D­3 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 t
complies with 3GPP standards

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he box. Voltage levels over this USIM interface

f. The LED statu

The LED indication has the

- LED on steady : The SAM3G is on and connect

s

following status :

ed, 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

1 DCD 2 Data Carrier D
2 RXD 5

Description

etect

Serial Data out of the SAM3G
3 TXD 6 Serial Data into the SAM3G
4 DTR 3 Not used
5 GND 4 Common Ground
6 DSR
7 RTS 7 Ready to Send
8 CTS 8 Clear to Send
9 RI

1 RED wire : Input voltage from 5Vdc to 32Vdc
4 BLACK wire : Power Ground

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7. Electrical characteristics

a. Power consumption

Vin = 12Vdc HSDPA/WCDMA GSM/GPRS/EDGE

Low Power mode 4mA 4mA
Normal mode 90mA 80mA

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@ 0dBm

Tx power 151mA ­@ 15dBm Tx power 200mA ­@ 21dBm Tx power 250mA -

Maximum peak 500mA

@ 5dBm Tx power - 151mA
@ 13dBm Tx power - 130mA
@ 33dBm Tx power - 170mA

Maximum peak - 830mA

b. RF bands

GSM850 : Tx

= 824MHz - 849MHz, Rx = 869MH

z - 894MHz
EGSM900 : Tx = 880MHz - 915MHz, Rx = 925MHz - 960MHz
DCS1800 : Tx = 1710MHz - 1785MHz, Rx = 1805MHz - 1880MHz
PCS1900 : Tx = 1850MHz - 1910MHz, Rx = 1930MHz - 1990MHz
UMTS2100 : Tx = 1920MHz - 1980MHz, Rx = 2110MHz - 2170MHz
UMTS1900 : Tx = 1850MHz - 1910MHz, Rx = 1930MHz - 1990MHz
UMTS850 : Tx = 824MHz - 849MHz, Rx = 869MHz - 894MHz

c. Receive sensitivity

Band T

ypical Rx

Sensitivity Maximum Rx Sensitivity

(dBm) (dBm)

GSM850 (2% ber) CS -107.5 -106
EGSM900 (2% ber) CS -107.5 -106
DCS1800 (2% ber) CS -106.5 -105
PCS1900 (2% ber) CS -106.5 -105
UMTS2100(.1% ber) 12.2Kbps -110.5 -109
UMTS1900(.1% ber) 12.2Kbps -110.5 -109
UMTS850(.1% ber) 12.2Kbps -110.5 -110

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d. Conducted Transmit Power tolerances

Parameter Conducted Tx Power Note

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GSM850 & GS

M900 CS +32dBm ±1dBm GMSK m

ode, connectorized (Cl.4)

+27dBm ±1dBm 8PSK mode, connectorized (Cl.E2)

DCS1800 & PCS1900 CS +29dBm ±1dBm GMSK mode, connectorized (Cl.1)

+626Bm ±1dBm 8PSK mode, connectorized (Cl.E2)

UMTS1900 & 850 12.2Kbps +23dBm ±1dBm connectorized (Cl.3)

UMTS2100 12.2Kbps +23dBm ±1dBm connectorized (Cl.3)

e. Main antenna specifications

Frequency band Netwo

rk type VSWR test frequen

cy

(MHz) (MHz)

824-894 GSM,GPRS,EDGE,UMTS Low : 824

CDMA Mid :

859

High : 894

880-960 GSM,GPRS,EDGE Low : 880

Mid : 920
High : 960

1710-1880 GSM,GPRS,EDGE Low : 1710

Mid : 1795
High : 1880

1850-1990 GSM,GPRS,EDGE,UMTS Low : 1850

CDMA Mid : 1920

High : 1990

1920-2170 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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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, follo

w these steps :

- Open the Control Panel

- Double click

System, Sy

stem 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

oments for the program to run.

m

Step2 : Connec

t 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 det

ected, 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 Ser

ial Bus Controllers : Sierra W

ireless 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 ste

ps :

- Open the Control Panel

- Double-click

-

Select Sierra Wireless 3G Watcher

Add or Remove programs

- 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 s

upported, 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. Ther

e 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 c

-

Connect the Antenna

ard into the SAM3G

- 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 :

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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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