User Manual

CISCO CONFIDENTIAL—DRAFT 1
5-2
Channels and Maximum Power Settings for Cisco Aironet Autonomous Access Points and Bridges
OL-11142-01
Chapter 5 Cisco Aironet 1250 Series Autonomous Access Point
Channels and Maximum Power Levels
Channels and Maximum Power Levels
Note The access point has been designed to operate with the antennas listed in the product hardware
installation guide and having a maximum gain of 10 dBi for 2.4 GHz and 6 dBi for 5 GHz. Antennas not
included in this list or having a higher gain are strictly prohibited for use with the access point. The
required antenna impedance is 50 ohms.
Note To reduce potential radio interference to other users, the antenna type and its gain should be chosen so
that the equivalent isotropically radiated power (e.i.r.p.) is not more than required for successful
communication.
2.4 GHz Band (pre-n IEEE 802.11n)
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 5-1 indicates the channel
identifiers, channel center frequencies, and maximum power levels for each channel allowed by the
–A regulatory domain for a 2.4-GHz radio with up to 10-dBi antennas.
Table 5-1 Channels and Maximum Conducted Power in the –A Regulatory Domain with up to 10-dBi Antennas
Maximum Conducted Power Levels (dBm) in the –A Regulatory Domain for the 2.4-GHz Radio with up to 10-dBi Antennas
Freq
(MHz)
Center
Channel
802.11b
Single Antenna
1 to 11 Mbps
802.11g
Single Antenna
6 to 54 Mbps
802.11g
Dual Antennas
6 to 54 Mbps
802.11g
Dual Antennas
with Beam
Forming
HT-20 MHz
Dual Antennas
M0 to M15
HT-40 MHz
Dual Antennas
M0 to M15
20
MHz
40
MHz
Tx
A
Tx
B
Total
Power
Tx
A
Tx
B
Total
Power
Tx
A
Tx
B
Total
Power
Tx
A
Tx
B
Total
Power
Tx
A
Tx
B
Total
Power
Tx
A
Tx
B
Total
Power
2412 1 3 20 OFF 20 17 OFF 17 17 17 20 17 17 20 17 17 20 14 14 17
2417 2 4 20 OFF 20 17 OFF 17 17 17 20 17 17 20 17 17 20 14 14 17
2422 3 5 20 OFF 20 17 OFF 17 17 17 20 17 17 20 17 17 20 14 14 17
2427 4 6 20 OFF 20 17 OFF 17 17 17 20 17 17 20 17 17 20 14 14 17
243253, 720OFF2017OFF17171720171720171720141417
243764, 823OFF2320OFF20202023202023171720171720
244275, 920OFF2017OFF17171720171720171720141417
2447 8 6 20 OFF 20 17 OFF 17 17 17 20 17 17 20 17 17 20 14 14 17
2452 9 7 20 OFF 20 17 OFF 17 17 17 20 17 17 20 17 17 20 14 14 17
245710820OFF2017OFF17171720171720171720141417
246211920OFF2017OFF17171720171720171720141417
2467––––––––––––––––––––
2472––––––––––––––––––––
2484––––––––––––––––––––