User's Manual

GM862-QUAD / PY Hardware User Guide

1vv0300748 Rev. 1 - 24/10/06

2.5 Mounting the GM862 Modules on your Board

In order to electrically connect your board to the Telit GM862 Family modules, use a CSTP 2x25 pin

vertical SMD SCH–SCH Molex 53748 - 0504 (female, low profile) as a counterpart to the CSTP 50

pin vertical SMD Molex 52991–0508 (male) of your Telit GM862 Family modules.

When mounting the Telit GM862 Family modules on your board, take care of soldering the GM862

shielding reeds on a ground plane or signal.

NOTE: be very careful when connecting the Telit GM862 module RF connector. The Telit GM862

module RF connector can be damaged if not connected with the proper antenna RF connector. The

minimum number of insertion cycles is recommended.

2.5.1 Antenna Coaxial Cable Fixing

The following constraints must be respected in the Telit GM862 Family modules antenna cable

connection:

• The fixing point of the coaxial cable must not be placed too close to the antenna connector of the

GM862 module, leaving at least 30mm of flexible cable between the fixed point and the plug end.

• The fixing point must be at the same height of the GM862 module antenna connector, eventually

using a wedge between the PCB and the cable if it is directly fixed to the PCB.

• The flexible cable must never be bent with a radius lower than 25mm (RG174 cable).

• The cable must be a RG174 type or more flexible ones.