Teldat M1 Installation Manual page 20

Teldat S.A.
Note
The WWAN antennas should be connected to the router at all times in order to deliver high-quality per-
formance.
The corresponding software license must be installed in the router for the cellular interface to work.
Some cellular telephony technologies use the antenna diversity technique to improve the quality of the signal re-
ceived (HSUPA, CDMA EV-DO, etc.). For this reason, the Teldat M1 router family is equipped with several WWAN
connectors:
Fig. 16: Fig. 17:
If the Main and Aux 1 antennas are connected via extension cables rather than being directly screwed into the router,
the minimum distance between them must be 7 cm. The maximum recommended distance between the two anten-
nas is 25 cm.
To achieve an optimum performance, any radio frequency accessories installed (antennas and cables) should be as
per our recommendations.
We offer a range of accessories (90-degree antenna mounts, exterior antenna mounts, ceiling mounts, extension
cables, etc.) that allow you to install the devices in different locations.
3.7.3.1 Positioning the antenna
Device performance can be significantly influenced by antenna orientation and location with respect to other wireless
devices and radiation sources (such as communication devices, personal computers, etc.).
Antennas transmit and receive radio signals. Performance is also affected by environmental factors (such as the dis-
tance between the device and base station), physical obstacles and radio-frequency (RF) interference.
In order to receive better coverage, follow the instructions given below:
• Whenever possible, place the antenna away from physical obstacles. Obstacles between the antenna and the
base station degrade the wireless signal. Place the antenna above ground level and direct it towards the nearest
base station.
• Antennas are affected by the density of materials so place them away from walls, metal screens, mirrors, etc.
• Do not place the antenna near columns; these might throw shadows and reduce the coverage area.
• Keep the antenna away from metal pipes such as canalization, air-conditioning etc.
• Bear in mind that other wireless devices such as telephones, microwaves, etc., can temporarily interfere with the
quality of the wireless signal.
• Installing the antennas in racks alongside communication devices, computers, etc, is not recommended. 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 equipment containing devices that radiate very close to, or touch-
ing, 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 interferences in other devices. Do not use the device in areas where medical equip-
ment is installed.
• In order to comply with the R&TTE 1999/5/EC directive, the device must be at least 15 cm away from a person's
body when operating.
Teldat Router M1/M1L
WWAN Main WWAN Aux1 antennas
and
3 Components and power supply
15