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Chapter 2 – Installation
Multi-Tech Systems, Inc. MultiModem GPRS USB Wireless Modem User Guide 8
Specifications
General Specifications
Mechanical Dimensions & Weight
4.3" L x 2.4" W x 0.94" H; 4.2 oz.
(11 cm x 6.1 cm x 2.4 cm; 119 g)
Connectors & Fasteners Antenna Connection type: SMA jack
Interface Connector: USB Type B
Phone Handset: Modular handset jack
SIM receptacle: Standard 3V SIM receptacle
Operating Temperatures
-20° to +55°C
Storage Temperatures
-40° to +85°C
Humidity
Relative humidity 20% to 90% noncondensing
Certifications
CE Mark
EMC: FCC Part 2, 15, 22, 24, EN 55022 & EN 55024
Safety: UL 60950, EN 60950
Electrical Characteristics
Switching the GPRS modem on/off The device is permanently powered when connected to the USB port.
Voltage Voltage Range: 5 to 32V DC
GND: 0V
Current Requirements
GSM/GPRS 850/900 GSM/GPRS 1800/1900
Parameters
Typ. Typ.
Unit
Input average supply current in comm. mode at P
max
360 300 mA
Input average supply current in idle mode 30 30 mA
Antenna/RF Specifications
GSM 850
Frequency RX
869 to 894 MHz
Frequency TX
824 to 849 MHz
RF Power Stand
2W at 12.5% duty cycle
Impedance
50 ohms
VSWR
<2
Typical Radiated Gain
0 dBi on azimuth plane
GSM 1800 GSM 1900
Frequency RX
1805 to 1880 MHz 1930 to 1990 MHz
Frequency TX
1710 to 1785 MHz 1850 to 1910 MHz
RF Power Stand
1W at 12.5% duty cycle 1W at 12.5% duty cycle
Impedance
50 ohms
VSWR
<2
Typical Radiated Gain
0 dBi on azimuth plane