Teldat M1 Installation Manual page 21

Teldat S.A.
Note
To achieve high-quality performance, the router should always have the WWAN antennas installed.
The router must have the corresponding software license installed 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.). Due to this, the Teldat M1 router family is equipped with several WWAN con-
nectors:
WWAN Main antenna
Fig. 16:
When the Main and Aux 1 antennas are not directly connected to the router but installed through extension cords,
the minimum distance between the two of them must be 7 cm. The maximum recommended distance between the
two is 25 cm.
To achieve an optimum performance, the radio frequency accessories installed (antennas and cables) should be
those recommended by Teldat.
Teldat has a series of accessories (90º mount antennas, antennas for exterior installation, antennas for ceiling install-
ation, extension cables, etc) that allow you to install the devices in different locations.
3.7.3.1 Placing the Antenna
Antenna orientation, its location with respect to other wireless devices and radiation devices (such as communication
devices, personal computers, etc.) can significantly influence device performance.
Antennas transmit and receive radio signals. Performance is also affected by environmental factors such as distance
between the device and the base station, physical obstacles and other interferences due to radiofrequencies (RF).
For optimum coverage, carry out the following instructions:
• 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 facing the nearest base sta-
tion.
• Density of materials also affects the antennas. Place them away from any type of walls, metal screens, mirrors,
etc.
• Do not place the antenna near columns, which may throw shadows and reduce the coverage area.
• Keep the antenna away from metal ducts such as canalization, air-conditioning etc.
• Please bear in mind that other wireless devices such as telephones, microwaves, etc., can temporarily interfere
with the quality of the radio signal.
• We do not recommend installing antennas near, or between, racks containing communication devices, computers,
etc. Use an extension cable and place the device outside.
The following recommendations are applicable to all wireless devices:
• Do not touch or move the antenna while the device is transmitting or receiving.
• Do not touch any equipment containing devices that radiate, where the antenna is very close to (or touching) any
exposed part of the body, particularly the face and eyes, while transmitting.
• 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.
• To ensure the R&TTE 1999/5/EC directive is complied with, the device must be at least 15 cm away from a per-
son's body when operating.
Teldat Router M1/M1L
WWAN Aux1 antenna
and Fig. 17:
3 Components and Power Supply
15