In cases where the Main and Ext.Diversity antennas are going to be connected through extension cables and not dir-
ectly to the device, the minimum distance between them must be 7 cm and the maximum recommended distance is
25 cm.
In order to achieve optimum features, the installed radio frequency accessories (antennas and cables) should be
those recommended by Teldat.
Teldat has a series of accessories (90º mount antennas, exterior antennas, ceiling antennas, extension cables, etc.)
that allow the Teldat H Automotive to be installed in different locations.
2.1.4.1 Positioning the antenna
The antenna orientation and its location with respect to other wireless devices and radiation devices (such as com-
munication devices, personal computers, etc.) can influence significantly the device performance.
The antennas transmit and receive radio signals. Performance is also affected by environmental factors (such as the
distance between the device and the base station), physical obstacles and other interferences due to radio frequen-
cies (RF).
In order to achieve the best coverage, follow these steps:
• Whenever possible, place the antenna where there are no physical obstacles. Obstacles between the antenna and
the base station degrade the wireless signal. Situate the antenna above ground level and ensure that it is suitably
orientated towards the nearest base station.
• Density of materials also affects the antennas. Place them away from any type of wall, metal screens, mirrors, etc.
• Do not place the antenna near columns that can produce shadow areas and reduce the coverage zone.
• Keep the antenna away from metal pipes such as canals, air-conditioning, etc.
• Please bear in mind that other wireless devices such as telephones, microwaves, etc., can temporarily interfere
with the quality of the wireless signal.
• We do not recommend that you install the antennas near or between racks containing communication devices,
computers, etc. Use an extension cable and place the antenna outside.
The following recommendations are applicable to all wireless devices:
• Do not touch or move the antenna while the device is transmitting or receiving.
• When the antenna is transmitting, do not touch any equipment that contains devices that radiate very close to, or
touching, any exposed part of the body (particularly face and eyes).
• Do not install the device in areas where the atmosphere is potentially explosive.
• Wireless devices can cause interference in other devices. Do not use the device in areas where medical equip-
ment is installed.
• In order to ensure that you are complying with the R&TTE 1999/5/EC norm, the device must be at least 15 cm
away from any person when operating.
2.1.5 Connecting the WLAN antenna
The Teldat H Automotive routers have two connectors for external antennas that improve the quality of the signal
received and transmitted through the Wireless LAN module. This module is optional. Your device may not have Wire-
less LAN and, consequently, no antennas. To assemble and disassemble the antennas, simply screw them into the
connectors labeled WLAN (located at the front of the device).
2 Installation Teldat S.A.
6Teldat H Automotive Family