NB3000-Line-Hd User Manual 4.2
better location offering an adequate signal. In doubt, please contact us and we would be
pleased to assist you in figuring out the best matching antenna setup for your application.
Keep in mind that effects caused by Faraday cages such as large metal surfaces (elevators,
machine housings, etc.), close meshed iron constructions and others may reduce signal re-
ception significantly.
The mounted antennas or antenna cables should be fixed with a wrench.
The following table shows how to connect the LTE/UMTS antennas. Generally, LTE interfaces
use both main and auxiliary antenna ports. but UMTS requires only the main antenna port.
Antenna Port
Type
MOB 1
A1
Main
MOB 1
A2
Auxiliary
MOB 2
A3
Main
MOB 2
A4
Auxiliary
MOB 3
A5
Main
MOB 3
A6
Auxiliary
MOB 4
A7
Main
MOB 4
A8
Auxiliary
Table 4.1.: LTE/UMTS antenna port types
Attention:
Following points must be observed when installing the antennas:
• A minimum clearance of at least 40 cm between people and the antennas
must always be ensured.
• If one mobile inerface transmit simultaneously with other collocated radio
transmitters the separation distance of 20 cm between the antennas must
be maintained at all times.
• Antennas which are installed outside a building or the vehicle hull must limit
transient overvoltages (according to IEC 62368-1) to below a peak of 1500 V
through external protection circuits.
• Mobile communications antennas may have an amplification of maximum
2.5dBi, including the cable attenuation, in the relevant frequency range.
4.3. Installation of the WLAN Antennas
The following table shows how to connect the WLAN antennas. The number of attached an-
tennas can be configured with the NetModule router "Enhanced-RF-Configuration" software
license. If only one antenna is used, it must be attached to the main port. However, for
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