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Cisco Aironet 1250 Series Access Point Hardware Installation Guide
OL-8247-03
Chapter 1 Overview
Hardware Features
Maximum Ratio Combining
The radio modules use three receivers to support maximum ratio combining (MRC) to enhance receiver
performance. MRC is a technique that combines the signals from multiple receivers in a manner to
optimize the signals. MRC can provide up to 3 dB of increased receive signal strength in all modes of
operation.
Antennas Supported
Table 1-1 lists the supported access point antennas.
Warning
The access point, antennas, and all interconnected equipment including the associated LAN
connections must be located indoors within the same building.
Statement 375
Note The access point has been designed to operate with the antennas listed below 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.
Table 1-1 Supported Antennas
2.4-GHz Antennas
Gain
(dBi) 5-GHz Antennas
Gain
(dBi)
AIR-ANT5959
1
diversity ceiling omnidirectional
1. The antenna has an attached UL2043 rated antenna cable.
2 AIR-ANT5135DG-R non-articulated omnidirectional 3.5
AIR-ANT2422DG-R non-articulated dipole 2.2 AIR-ANT5135D-R articulating dipole 3.5
AIR-ANT4941 articulating dipole 2.2 AIR-ANT5140V-R omnidirectional 4
AIR-ANT2430V-R omnidirectional 3 AIR-ANT5145V-R
1
diversity ceiling omnidirectional 4.5
AIR-ANT1728 ceiling omnidirectional 5.2 AIR-ANT5160V-R
1
omnidirectional 6
AIR-ANT2506 mast mount omnidirectional 5.2
AIR-ANT3213 diversity pillar omnidirectional 5.2
AIR-ANT2460P-R
1
ceiling omnidirectional 6
AIR-ANT2465P-R
1
diversity patch directional 6.5
AIR-ANT2485P-R
1
patch directional 8.5
AIR-ANT2410Y-R
yagi directional 10