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Chapter 2
802.11 Standards
Channel
Identifier
128
132
136
140
149
153
157
161
i
Users are responsible for ensuring that the channel set configuration is in compliance with the
regulatory standards of the country they are residing.
Spectral mask
The spectral mask or Power Spectral Density (PSD) mask for the 802.11a standard is shown in the following
figure:
Available channels
In the U-NII 1 and 2 bands, eight non-overlapping channels are available. Bear in mind that the centre
frequencies of the edge channels are 30 MHz from the band edge and the spacing between the centre
frequencies is 20 MHz.
In the U-NII 3 band, four non-overlapping channels are available. In contrast to the other bands, the centre
frequencies are only 20 MHz from the edge band. The spacing between the other centre frequencies remains
20 MHz.
E-DOC-CTC-20060609-0001 v2.0
Centre
Frequency
America
(GHz)
5.640
-
5.660
-
5.680
-
5.700
-
5.745
-
5.765
-
5.785
-
5.805
-
f
-22
f
-11
c
c
Regulatory Domain
ETSI
Japan
Y
-
Y
-
Y
-
Y
-
-
-
-
-
-
-
-
-
0 dBr
-30 dBr
f
f
+11
f
+22
c
c
c
Taiwan
Singapore
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MHz
17
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