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Access Point Placement
For optimal performance, install the Access Point away from transformers, heavy-duty motors,
fluorescent lights, microwave ovens, refrigerators and other industrial equipment. Signal loss can occur
when metal, concrete, walls or floors block transmission. Install the Access Point in an open area or add
Access Points as needed to improve coverage.
Antenna coverage is analogous to lighting. Users might find an area lit from far away to be not bright
enough. An area lit sharply might minimize coverage and create dark areas. Uniform antenna placement
in an area (like even placement of a light bulb) provides even, efficient coverage.
Place the Access Point using the following guidelines:
Install the Access Point at an ideal height of 10 feet from the ground.
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Orient the Access Point antennas vertically for best reception.
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Point the Access Point antennas downward if attaching to the ceiling.
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To maximize the Access Point's radio coverage area, Extreme Networks recommends conducting a site
survey to define and document radio interference obstacles before installing the Access Point.
Site Surveys
A site survey analyzes the installation environment and provides users with recommendations for
equipment and placement. The optimum placement of 802.11a/n Access Points differs from
802.11b/g/n Access Points, because the locations and number of Access Points required are different to
support the radio coverage area.
Extreme Networks recommends conducting a new site survey and developing a new coverage area
floor plan when switching from legacy Access Points (Altitude 3500 models) to a new Altitude 4700
series model, as the device placement requirements could be significantly different.
Antenna Options
Extreme Networks supports two antenna suites for Altitude 4700 series models. One antenna suite
supporting the 2.4 GHz band and another antenna suite supporting the 5 GHz band. Select an antenna
model best suited to the intended operational environment of your Access Point. If a three radio
Altitude 4750 is purchased, the Access Point ships with a single antenna connected to the Access Point
chassis (next to the existing R1-A connector). This antenna is in addition to the other six antennas
available to the Access Point's other two radios. The single antenna supporting the Altitude 4750 Access
Point's third radio supports sensor mode only and can not function as a WLAN radio.
NOTE
On a dual-radio model, Radio 1 refers to the 2.4 GHz radio and Radio 2 refers to the 5 GHz radio.
However, there could be some cases where a dual-radio Access Point is performing a Rogue AP detector function.
In this scenario, the Access Point is receiving in either 2.4 GHz or 5 GHz over the Radio 1 or Radio 2 antennae
depending on which radio is selected for the scan.
Altitude 4700 Series Access Point Product Reference Guide
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