Specifications

Part 1 - Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342P) 31
Cellular Information
Antenna System for Cellular Devices
The cellular/wireless performance is completely dependent on the implementation and antenna design. The
integration of the antenna system into the product is a critical part of the design process; therefore, it is essential to
consider it early so the performance is not compromised. If changes are made to the certified antenna system of the
SocketModem, then recertification will be required by specific network carriers such as Sprint. The Antenna System
is defined as the UFL connection point from the SocketModem to the specified cable specifications and specified
antenna specifications.
Antenna Specifications
CDMA RF Specifications
CDMA 800
CDMA 1900
Frequency RX
869 to 894 MHz
1930 to 1990 MHz
Frequency TX
824 to 849 MHz
1850 to 1910 MHz
CDMA Antenna Requirements/Specifications
Frequency Range
824 – 894 MHz / 1850 – 1990 MHz
Impedance
50 Ohms
VSWR
VSWR shall not exceed 2.0:1 at any point across the bands of operation
Typical Radiated Gain
2 dBi on azimuth plane
Radiation
Omni-directional
Polarization
Vertical
Antenna Loss
Free space not to exceed -3dB
TRP/TIS
The total radiated power (TRP) at the antenna shall be no less than
+21/20 dBm for PCS/CELL channels respectively, and the total isotropic
sensitivity (TIS) at the antenna shall be no less than -104/104 dBm for
PCS/CELL channels respectively.
PTCRB Requirements for the Antenna
There cannot be any alteration to the authorized antenna system. The antenna system must maintain the same
specifications. The antenna must be the same type, with similar in-band and out-of-band radiation patterns.
GSM/EGSM RF Specifications
GSM 850
EGSM 900
GSM 1800
GSM 1900
Frequency RX
869 to 894 MHz
925 to 960 MHz
1805 to 1880 MHz
1930 to 1990 MHz
Frequency TX
824 to 849 MHz
880 to 915 MHz
1710 to 1785 MHz
1850 to 1910 MHz