Netgear ANT2409v2 Installation Guide download pdf (Page 9)

Installation Guide for the 9 dBi Omni-directional Antenna ANT2409

1-5

v1.0, April 2008

• Minimize obstructions around the antenna. Ideally there shall be a visual line

of sight between the ANT2409 and the client antenna(s).

• High ceiling: place the ANT2409 in the center of the room installed up side

down on a pole or on the ceiling with the L shape bracket.

• Outdoors: Place the ANT2409 on a roof fixed on a pole 2m above the roof

level, or fixed directly on the roof near the edge, or against a wall, or on top of

a telephone box. In most of the cases one ANT2409 is sufficient because the

multipath fading is low or acceptable. However in cases where the building

density is high, or narrow streets, or direct echo from another building, etc.

two ANT2409 can improve the wireless performance (throughput and range).

This latter is applicable only if the wireless device has two RF ports.

• NOTE: Ground cable is not provided but is required. Use AWG 10, UL 1015,

Standard 600 V, 105°C, green or green/yellow insulation, 2 clips with a 5.5

mm inner diameter clamped at both ends, and cable no longer than 5 meters.

• Indoors: Place the ANT2409 above cubicle level, at the center of large room

area preferred attached to the ceiling, a pole, or a column. Ideally, it should be

located outside an IT data center or outside a room with multiple metal

partitions. Use a NETGEAR antenna cable of up to 10 m length to connect the

antenna to the wireless access point/router. In some situations one ANT2409

is sufficient because the multipath fading is low or acceptable and/or the client

adapter wireless node provide spatial diversity. However in other cases where

the multipath fading effect is medium to high two ANT2409 spaced by a few

meters can improve the wireless performance (throughput and range). This

latter is applicable only if the wireless device has two RF ports.

Indoor wireless propagation loss increases as follows:

– Wood building -- relatively little loss

– Floors in concrete -- some loss

– Reinforced concrete -- more loss

– Metal floor or reinforced concrete with a lot of metal pipes, metal air

conditioning channel, etc. -- most loss

• The best performance is achieved with a short cable between the antenna and

the wireless device. The shortest approved cable to be used in conjunction

with the ANT2409 in North America is the NETGEAR 1.5 m (ACC-10314-

01) cable.

• The antenna should be installed so that it is a minimum of 30 cm (12 inches)

away from people.

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Netgear ANT2409v2 Installation Guide Page 9