Antenna Diversity; Installation Of Airlancer Extender Antennas - Lancom L-54g Wireless Manual

LANCOM L-54g Wireless - LANCOM L-54ag Wireless - LANCOM L-54 dual Wireless
Chapter 7: Options and accessories
7.1.1

Antenna Diversity

The transmission of radio signals can suffer from significant signal losses
because of reflection and scatter, among other reasons. In some areas, the
interaction with the reflected radio waves can cause a drop in signal strength,
or even cause it to be cancelled out completely.
Transmission quality can be improved with so-called "diversity" methods. The
principle of diversity methods relies on the fact that a transmitted signal is
often received multiple times (generally twice). With appropriate processing,
these signals can be re-combined into a single signal. The most common
methods are space diversity and polarization diversity.
LANCOM Systems supplies a variety of polarization-diversity antennas as
accessories for LANCOM Access Points and LANCOM Wireless Routers. These
models enable two orthogonally polarized signals to be received with a single
antenna. Further information about this technique is available in our "Polari-
zation Diversity" techpaper.
7.1.2

Installation of AirLancer Extender antennas

Polarization diversity antennas from LANCOM Systems:

For installation of an optional AirLancer antenna turn off the LANCOM by pul-
ling out the power supply cable of the device. Remove now carefully the two
diversity antennas on the back by screwing them out. Connect the AirLancer
antennas to the antenna connector with the inscription 'Antenna Main'.
LANCOM L-54 dual
Wireless
70
AirLancer Extender O-D80g (2.4 GHz band ), item no. 61221
AirLancer Extender O-D60a (5 GHz band ), item no. 61222
AirLancer Extender O-D9a (5 GHz), item no. 61224
Before mounting external antennas, please observe the information
on lightning protection in the LANCOM Outdoor Wireless Guide (avai-
lable as a download from www.lancom.eu). Mounting antennas wit-
hout adequate lightning protection could lead to serious damage to
the access point and the network infrastructure connected to it.
Aux 2 Aux 1
'Antenna Main' connector for AirLancer antenna
ETH 2 ETH 1 Config (COM)
Main 2 Main 1
Reset