Modem User Manual

LZT 123 1834 74

6 Antenna Connector

The wireless modem’s antenna connector allows transmission of the radio frequency

(RF) signals from the wireless modem to an external customer supplied antenna. The

connector is a micro-miniature coaxial MMCX through hole mounted socket.

A number of suitable MMCX type, mating plugs are available from the following

manufacturers:

• Amphenol

• Suhner

• IMS Connector Systems

The nominal impedance of the antenna interface is 50 ohms.

Feature GSM850 E-GSM900 GSM1800 GSM1900

Frequency range (MHz)

824-894 880-960 1710-1880 1850-1990

Maximum power

33dBm (2W)

30dBm (1W)

Antenna Connector impedance 50 ohms

Antenna VSWR 2.5:1 max

To bypass the MMCX connector, a pair of PCB landing pads are

available on the underside of the module. You can probe these pads or

solder a coaxial cable directly to them. Sony Ericsson; however, cannot

guarantee absolute performance when connecting to the antenna in

this way due to the attenuation such a connection could potentially

cause. When connecting in this way, proceed with care.

5.20-4 RF Antenna Pad Dimensions

NOTE