E-4
Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide for Windows Vista
OL-16534-01
Appendix E 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 E-3
indicates the maximum EIRP
supported for all regulatory domains for each 5 GHz IEEE 802.11a data rate.
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 E-4
indicates the maximum EIRP
supported for all regulatory domains for each 2.4 GHz IEEE 802.11b data rate.
Table E-3
Maximum EIRP for IEEE 802.11a
Data Rate
Maximum EIRP for PC-Cardbus Card
with 0-dBi Antenna Gain and PCI Card
with 1-dBi Antenna Gain
mW
dBm
6 Mbps
40
16
9 Mbps
40
16
12 Mbps
40
16
18 Mbps
40
16
24 Mbps
40
16
36 Mbps
25.1
14
48 Mbps
20
13
54 Mbps
20
13
Table E-4
Maximum EIRP for IEEE 802.11b
Data Rate
Maximum EIRP for PC-Cardbus Card
with 0-dBi Antenna Gain and PCI Card
with 1-dBi Antenna Gain
mW
dBm
1 Mbps
100
20
2 Mbps
100
20
5.5 Mbps
100
20
11 Mbps
100
20