4/21/03
Airespace AP External and Internal Antennas
90-100xxx-000
Airespace AP Installation Guide
7
Airespace AP External and Internal Antennas
About Airespace AP External and Internal Antennas
The AS-1200-A Airespace AP enclosure contains one 802.11a radio which
drives two fully-enclosed high-gain antennas which provide a large
360-degree coverage area. When equipped with an optional factory-supplied
external antenna, the 802.11a radio supports receive and transmit diversity
between the internal antenna and the external antenna.
The diversity function provided by Airespace radios can result in lower
multipath fading, fewer packet retransmissions, and higher client throughput.
Note:
The Airespace APs must use the factory-supplied internal or
external antennas to avoid violating FCC requirements and voiding the
user’s authority to operate the equipment. Refer to
FCC Statements
for Airespace AP
for detailed FCC information.
The AS-1200-AB Airespace AP enclosure contains one 802.11a and one
802.11b radio and four fully-enclosed high-gain antennas which provide large
360-degree 802.11a and 802.11b coverage areas. Note that the 802.11b
radio supports receive and transmit diversity between the internal antennas,
while the 802.11a radio supports diversity between the internal antennas and
an optional factory-supplied external antenna.
The AS-1200-B Airespace AP enclosure contains one 802.11b radio and a slot
for an 802.11a radio card, and four high-gain antennas, which provide large
360-degree 802.11b (and future 802.11a) coverage areas. The 802.11b radio
supports receive and transmit diversity between the internal antennas. Note
that the 802.11a radio supports diversity between the internal antennas and
an optional factory-supplied external antenna.
The Airespace APs have reverse-polarity TNC jacks for installations requiring
factory-supplied external directional or high-gain antennas. The external
antenna option can create more flexibility in Airespace AP and antenna
placement.
Note that the Airespace System supports Antenna Sectorization, which can
be used to increase the number of clients and/or client throughput in a given
air space. Installers can mount two Airespace APs back-to-back and the
Airespace Switch operator can disable the second antenna in both Airespace
APs to create a 360-degree coverage area with two sectors.
