Wireless LAN – WLAN
BAT54-Rail/F..
Release
7.54
06/08
3.4
Configuration of WLAN parameters
69
Turbo mode
Using two neighboring, vacant channels for wireless transmissions can in-
crease the transfer speeds up to 108 Mbps. Set this option for the 2.4-GHz
band by selecting the drop down list '2.4 GHz mode', for the 5-GHz band in
the appropriate list '5 GHz mode' below.
Antenna gain
Transmission power reduction
Where the transmission power of an antennae exceeds the levels permitted
in the country of operation, the power must be attenuated accordingly.
D The field 'Antenna gain' is for the gain of the antenna minus the actual ca-
ble loss. For an AirLancer Extender O-18a antenna with a gain of 18dBi
and a 4m cable with a loss of 1dB/m, the 'Antenna gain' would be entered
as 18 - 4 = 14. This value for true antenna gain is dynamically used to cal-
culate and emit the maximum permissible power with regards to other pa-
rameters such as country, data rate and frequency band.
D In contrast to this, the entry in the field 'Tx power reduction' causes a static
reduction in the power by the value entered, and ignores the other param-
eters. Also see ’Establishing outdoor wireless networks’ → page 112.
Note: The transmission power reduction simply reduces the emitted power.
The reception sensitivity (reception antenna gain) remains unaffected.
This option is useful, for example, where large distances have to be
bridged by radio when using shorter cables. The reception antenna gain
can be increased without exceeding the legal limits on transmission pow-
er. This leads to an improvement in the maximum possible range and, in
particular, the highest possible data transfer rates.
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