Chapter 1 – Product Description and Specifications

10 Multi-Tech Systems, Inc. MultiModem iCell Intelligent Wireless Modem User Guide

RF Specifications

GSM 850 EGSM 900 GSM 1800 GSM 1900

Frequency RX

869 to 894 MHz 925 to 960 MHz 1805 to 1800 MHz 1930 to 1990 MHz

Frequency TX

824 to 849 MHz 880 to 915 MHz 1710 to 1785 MHz 1850 to 1910 MHz

RF Power Stand 2W at 12.5% duty

cycle

2W at 12.5% duty

cycle

1W at 12.5% duty

cycle

1W at 12.5% duty

cycle

Antenna Specifications

GSM/EGSM Antenna Requirements/Specifications

Frequency Range: 824 – 960 MHz / 1710 – 1990 MHz

Impedance: 50 Ohms

VSWR: <2.0:1

Typical Radiated Gain: 3 dBi on azimuth plane

Radiation: Omni

Polarization: Vertical

Wave: Half Wave Dipole

Antennas Available from Multi-Tech Systems, Inc.

Description Part Number

Hinged Right Angle 900/1800 MHz Cellular Modem Antenna ANF1-1HRA

Hinged Right Angle 800/1900 MHz Cellular Modem Antenna ANF21HRA

Hinged Right Angle 850/900/1800/1900 MHz Cellular Modem Antenna ANQB-1HRA

PTCRB Requirements Note

There cannot be any alteration to the authorized antenna system. The antenna system must be the same type

with similar in-band and out-of-ban radiation patterns and maintain the same specifications.

FCC Requirements Note

The antenna gain, including cable loss, must not exceed 3.0 dBi at 1900 MHz / 1.6 dBi at 850 MHz for mobile

operating configurations and 7.0 dBi at 1900 MHz / 2.3 dBi at 850 MHz for fixed mounted operations, as defined

in 2.1091 and 1.1307 of the rules for satisfying RF exposure compliance.

RS232 9-Pin Functions of the Female End Connector

The following table explains the pin functions.

External Power

Serial Cable

Female Connector

Signal IN/OUT

Pin 1 CD O

Pin 2 RX O

Pin 3 TX I

Pin 4 DTR I

Pin 5 GND --

Pin 6 DSR O

Pin 7 RTS I

Pin 8 CTS O

Pin 9 RI O

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 26 27

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