User manual
GTR64  http://www.matrix.es/GTR64 
Tip! 
Before installing the modem, use an ordinary mobile telephone to check a possible location for it. 
s to GTR64 Terminal 
 instance, improperly made connections or 
 or 
quipment. 
.1.4 Network and Subscription 
.2 How to install the modem 
it is powered from a battery or a high current supply, connect a fast 1.25A fuse in line 
ith the positive supply. This protects the power cabling and modem. 
.2.2 Securing the modem 
ss is restricted, it may be easier to connect all the cables to the modem prior to securing it 
 the application. 
l modem to the host application using two 3mm diameter pan-head 
rews 
he antenna is the component in your system that maintains the radio link between the network and the 
nd receives electromagnetic energy, its efficient function will 
epend on: 
for example, circular or directional); 
the placement of the antenna; 
ble, and possible 
s, connectors, antenna 
lacement, and the surrounding area. 
ou should also determine whether the antenna needs to be grounded or not. Your local antenna 
In determining the location for the modem and antenna, you should consider signal strength as well as 
cable length. 
7.1.3 Connections of component
The integrator is responsible for the final integrated system. Incorrectly designed or installed, external 
components may cause radiation limits to be exceeded. For
improperly installed antennas can disturb the network and lead to malfunctions in the modem
e
7
Before your application is used, you must ensure that your chosen network provides the necessary 
telecommunication services. Contact your service provider to obtain the necessary information. 
• If you intend to use SMS in the application, ensure this is included in your (voice) subscription. 
• Consider the choice of the supplementary services 
7
7.2.1 Power supply 
• Use a high-quality power supply cable with low resistance. This ensures that the voltages at the 
connector pins are within the allowed range, even during the maximum peak current. 
• When the un
w
7
Before securing the modem take into account the amount of additional space required for the mating 
connectors and cables that will be used in the application. 
• Where acce
in
• Securely attach the GTR64 Termina
sc
7.3 Antenna 
7.3.1 General 
T
modem. Since the antenna transmits a
d
• the type of antenna (
• 
• communication disturbances in the vicinity in which the antenna operates. 
In the sections below, issues concerning antenna type, antenna placement, antenna ca
communication disturbances are addressed. In any event, you should contact your local antenna 
manufacturer for additional information concerning antenna type, cable
p
Y
manufacturer might be able to design a special antenna suitable for your the application. 
GTR64 Integrators Manual V.1.2  Pag. 28 
Preliminary. Subject to change without prior notice 










