D-4
Cisco Aironet 340, 350, and CB20A Wireless LAN Client Adapters Installation and Configuration Guide for Windows
OL-1394-07
Appendix D Channels, Power Levels, and Antenna Gains
Maximum Power Levels and Antenna Gains
Maximum Power Levels and Antenna Gains
IEEE 802.11a
An improper combination of power level and antenna gain can result in equivalent isotropic radiated
power (EIRP) above the amount allowed per regulatory domain.
Table D-3
indicates the maximum
power levels and antenna gains allowed for each IEEE 802.11a regulatory domain.
IEEE 802.11b
An improper combination of power level and antenna gain can result in equivalent isotropic radiated
power (EIRP) above the amount allowed per regulatory domain.
Table D-4
indicates the maximum
power levels and antenna gains allowed for each IEEE 802.11b regulatory domain.
Table D-3
Maximum Power Levels Per Antenna Gain for IEEE 802.11a
Regulatory Domain
Maximum Power Level (mW)
with 6-dBi Antenna Gain
Americas (-A)
(160 mW EIRP maximum on channels 34-48,
800 mW EIRP maximum on channels 52-64)
20
Japan (-J)
(10 mW/MHz EIRP maximum)
20
Singapore (-S)
(100 mW EIRP maximum)
20
Taiwan (-T)
(800 mW EIRP maximum)
20
Table D-4
Maximum Power Levels Per Antenna Gain for IEEE 802.11b
Regulatory Domain
Antenna Gain (dBi)
Maximum Power Level (mW)
Americas (-A)
(4 W EIRP maximum)
0 100
2.2
100
5.2
100
6 100
8.5 100
12
100
13.5
100
21
20
