Antenna Specifications

Chapter 2 – Installation

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-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.

Interfaces

The Wireless MultiModem has several interfaces:

•LED function indicating operating status

•External antenna (via SMA connector)

•Serial and control link (via USB connector)

•Microphone and speaker (via handset jack)

•SIM card holder

LED Interface

	LED Indicators
TD	Transmit Data. Lit when modem is transmitting data.
RD	Receive Data. Lit when modem is receiving data.
CD	Carrier Detect. Lit when data connection has been established.
LS	Line Status.
	Continuous “on” state indicates that the wireless modem is not registered on the network.
	Flashing state indicates registration on network.
	Off state. Modem is off (not ready) or in download mode.
TR	Terminal Ready. Commonly called “Data Terminal Ready.” This is a readiness signal from the PC.
PWR	Power. Indicates presence of DC power when lit.

AT Command Reference Guides

AT commands for the GPRS USB wireless modem are published in a separate GPRS AT Commands Reference Guide included on the MultiModem CD and posted on the Multi-Tech web site.

Multi-Tech Systems, Inc. MultiModem GPRS USB Wireless Modem User Guide