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User Manual

User Manual Access Point /Client

Access Point /Client

Access Point /Client V 3.0.3

V 3.0.3

802.11

WLAN-1

802.11h is an extension of the IEEE 802.11 WLAN standard, introduced to avoid, particularly
in  Europe,  interference  with  satellite  and  radar  systems  employing  the  5  GHz  band.  The
standard  consists  of  two  chief  components:  DFS  (Dynamic  Frequency  Selection)  and  TPC
(Transmission  Power  Control).  DFS  settings  for  this  device  can  be  configured  on  the
standard WLAN configuration page.

TPC:

The objective of Transmission Power Control is to reduce the device’s average transmission
power as much as possible. TPC is always active when a 5 GHz channel is used – it cannot
be turned off in such cases. By default, TPC is not active in the 2.4 GHz band, but it may be
enabled if desired.

Power Profiles:

• Standard: Optimises transmission power for a data rate of 48 MBit/s.

• Max. Power: Optimises transmission power for a data rate of 54 MBit/s.

• Min. Power: Optimises transmission power for a data rate of 11/12 MBit/s.

TPC Update Rate:

Clients moving quickly should use the higher update rate in order to prevent connection
losses. The lower rate may be used for static connections.

DFS Scan Time:

DFS requires the WLAN to be deactivated once every 24 hours in order to scan all available
channels for radar signals (this process takes at least one minute). To avoid occurrence of
this obligatory connection loss at critical times, you may specify a particular time at which to
perform the DFS radar scan.

( FCC-Version )