Motorola AP-51XX - Manual (Page 205)

Network Management 5-57
3. Configure the Radio Settings field to assign a channel, antenna diversity setting, radio
transmit power level and data rate.
Radio Type The Radio Type parameter simply displays the radio type as
802.11a or 802.11b/g. This field is read only and always displays
the radio type selected from the access point menu tree under the
Radio Configuration item.
ERP Protection Extended Rate PHY (ERP) allows 802.11g MUs to interoperate with
802.11b only MUs. ERP Protection is managed automatically by the
access point and informs users when 802.11b MUs are present
within the access point’s coverage area. The presence of 802.11b
MUs within the 802.11g coverage area negatively impacts network
performance, so this feature should looked to as an indicator of
why network performance has been degraded.
Channel Setting The following channel setting options exist:
User Selection - If selected, use the drop-down menu to specify
the legal channel for the intended country of operation. The drop-
down menu is not available if this option is not selected.
Automatic Selection - When the access point is booted, the
access point scans non-overlapping channels listening for beacons
from other access points. For 802.11b, it scans channels 1, 6, and
11. For 802.11a, all channels are non-overlapping. After the
channels are scanned, it will select the channel with the fewest
access points. In the case of multiple access points on the same
channel, it will select the channel with the lowest average power
level.
The
Uniform Spreading option is available (and is the default
setting for the 802.11a radio). To comply with Dynamic Frequency
Selection (DFS) requirements in the European Union, the 802.11a
radio uses a randomly selected channel each time the access point
is powered on.
Antenna Diversity Specifies the antenna selection for the 802.11a radio. Options
include Primary Only, Secondary Only and Full Diversity. The default
setting is Primary. However, Diversity can improve performance
and signal reception in areas where interference is significant and
is recommended when two antennas are supported.
Power Level Defines the transmit power of the 802.11a or 802.11b/g antenna(s).
The values are expressed in dBm and mW.