User's Manual

Chapter 11 – SocketModem EDGE (MTSMC-E)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342D) 141
Peripheral Devices
Antenna
The integrated modem antenna connector is a MMCX connector. The MMCX connector incorporates a
'Snap On' latching action in order to make the connection easier with an excellent RF performance. An
additional advantage is its small physical size, which is 50% of the standard MCX connector.
This type of connector is suitable for the standard ranges of flexible and semi-rigid cables. The characteristic
impedance of the MMCX coaxial connector is 50 ohm. The antenna manufacturer must guarantee that the
antenna will be working according to the radio characteristics presented in the table below.
RF performances are compliant with the ETSI recommendation 05.05 and 11.10.
The main parameters are:
Ordering an Antenna
An antenna with matting connector can be ordered, for example, from Multi-Tech or GMBH:
6-Inch Antenna Cable – SMA Jack to MMCX Plug
Multi-Tech Systems, Inc.
http://www.multitech.com
Part Number: 45009630
IMS Connectors Systems GMBH
http://www.imscs.com/
MMCX Plug
The SocketModem requires an MMCX plug to connect to an antenna.
MMCX Connector Example (right angle type)
A small MMCX / SMA adapter can be ordered from:
Amphenol
http://www.amphenol.com/
Part Number: 908-31100
SIM Connector
The internal SIM interface of the SocketModem supports the standard 3V SIM only.