User guide

Chapter 1 – Product Description and Specifications
10 Multi-Tech Systems, Inc MultiModem iCell Intelligent 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 ANF2-1HRA
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-band radiation patterns and maintain the same specifications.
FCC Requirements Note
The antenna gain, including cable loss, for the radio you are incorporating into your product design must not exceed the
requirements at 850 MHz and 1900 MHz as specified by the FCC grant for mobile operations and fixed mounted operations
as defined in 2.1091 and 1.1307 of the FCC rules for satisfying RF exposure compliance. The antenna used for transmitting
must be installed to provide a separation distance of at least 20cm from all persons and must not transmit simultaneously
with any other antenna transmitters. User and installers must be provided with antenna installation instructions and
transmitter operating conditions to 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