Fig. 10: Antenna connectors for Wireless WAN (with diversity)
As a general rule, in devices incorporating two WWAN antenna connectors (Main and Ext.Diversity), we recom-
mend you always install both antennas. You must always install an antenna for the Main connector. The Ext.Diversity
connector antenna is optional in some devices, depending on the technology used (e.g. Sierra Wireless HSUPA). In
devices where this is optional, and you are not going to install Ext.Diversity, you need to suitably configure the router,
disabling this antenna, in order to obtain optimum performance.
When the Main and Ext.Diversity antennas are not directly connected to the router, but are installed through exten-
sion cables, the minimum distance between the two must be 7 cm. Maximum recommended distance is 25 cms.
For optimum performance, use the radio frequency accessories (antennas and cables) recommended by Teldat.
Teldat has a range of accessories available (90º mount antennas, exterior antennas, ceiling antennas, extension
cables, etc.), allowing the Teldat H/L to be installed in different locations.
2.1.3.1 Placing the antenna
The orientation of the antenna and its location with respect to other wireless devices or other radiation sources (such
as communication 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).
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. Place the antenna above ground level and steer it towards the
nearest base station.
• The 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 throw shadows and reduce the coverage area.
• 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 antennas in 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 router is transmitting or receiving.
• Do not touch any equipment that contains devices that radiate where the antenna is very close to, or touching, any
exposed part of the body, particularly the face and eyes, when it is transmitting.
• Do not install the device in areas where the atmosphere is potentially explosive.
• Wireless devices can cause interferences with other devices. Do not use the router in areas where medical equip-
ment is installed.
• To ensure compliance with Directive R&TTE 1999/5/EC, the router must be at least 15 cm away from a person’s
body when operating.
2 Installation
Teldat S.A.
8
Teldat H/L Router Family
