7
Using an External Antenna with the 170wl Radio Card
Installation Procedure
3. Configure the Radio Transmit Power Control Levels
The access point must be configured for the type of radio card and transmit
(TX) power must be limited to conform to local regulations. Use the regional
settings for each antenna as provided in the TX Power Control table below.
For more information on access point configuration, refer to "Configuring the
AP using CLI Commands" section, of Appendix C, of the
HP ProCurve Wireless
Access Point 520wl User’s Guide,
which is on the Documentation CD-ROM
that came with your access point.
C a u t i o n
An improper combination of transmit power and antenna gain may result in
an EIRP (equivalent isotropically radiated power) power level in excess of the
legally imposed limit. The transmit power reduction required for each antenna
is listed in the following table. Failure to adhere to these guidelines may violate
the radio laws for your region. For additional information on setting radio
transmit power, refer to "Configuring the AP using CLI Commands" section,
of Appendix C, of the
HP ProCurve Wireless Access Point 520wl User’s Guide
.
Table 2.
TX Power Control Setting and Required Insertin Loss
.
Antenna Type
European Union
Power Level Setting (%)
Required Insertion Loss (dB)
5 dBi Indoor/Outdoor Omni, J8441A
100%
50%
0.7
none
7 dBi Indoor/Outdoor Directional, J8443A 100%
50%
3
none
8 dBi Outdoor Omni, J8444A
100%
50%
3.7
0.7
11 dBi Indoor/Outdoor wide angle directional,
J8446A
100%
50%
6.7
3.7
14 dBi yagi, J8448A
100%
50%
10.1
7.1