Multi-Tech Systems MTCBA-G-F4 manual RF Specifications, Antenna Specifications, Interfaces

Chapter 1 – Product Description and Specifications

RF Specifications

	GSM 850	EGSM 900
Frequency RX	869 to 894 MHz	925 to 960 MHz
Frequency TX	824 to 849 MHz	880 to 915 MHz
RF Power Stand	2W at 12.5% duty	2W at 12.5% duty
	cycle	cycle

GSM 1800

1805 to 1800 MHz

1710 to 1785 MHz

1W at 12.5% duty cycle

GSM 1900

1930 to 1990 MHz

1850 to 1910 MHz

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.

Interfaces

The Wireless MultiModem has several interfaces:

•LED function indicating operating status

•External antenna (via SMA connector)

•Serial and control link (via 15 pins SUB D)

•Power supply (via 2.5mm miniature power jack)

•SIM card holder

LEDs

	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.

Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide 8