3Com 3CRWEASY96A Manual de início rápido - Página 4

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309-2273-001AA.fm Page 4 Monday, February 3, 2003 4:54 PM

has metal siding. If necessary, you can mount an antenna inside a building; however, indoor

placement reduces the antenna's effective range.

To ensure the physical safety of anyone near the antenna and to prevent damage to the

bridge, follow the building codes for antenna installations in your area.This is another good

reason to make sure that only a professional performs the installation.

Keep in mind that In order to comply with FCC radio-frequency radiation exposure

guidelines, a minimum body to antenna distance of 2 meters (6 feet) must be maintained

while operating this device.

Ensure that access is available for routing the Ethernet cable from the bridge to the Ethernet

connection inside.

Make certain that the antenna mast is appropriately grounded. Proper grounding can

prevent injury or damage from lightning strikes.

After installing the bridge, the highest allowable power level is automatically set when

country selection is conﬁgured. Adhering to this conﬁguration ensures compliance with

national laws.

Align and Polarize the Units

For optimal performance, position the antenna so that there are minimal obstacles between it and any

other antenna with which it will communicate. While maintaining a direct line of sight between

antennas is not strictly necessary, such a conﬁguration helps to ensure a strong signal. As mentioned

earlier, this is not always possible in long distance conﬁgurations.

Any two bridge units that are to communicate with each other must be set for the same polarization,

either horizontally or vertically. If cross-polarization occurs, the link with either work poorly or not at all.

Please refer to the "Polarization" section of the User Guide for further details.

The following illustration shows proper alignment, orientation and polarization for optimal performance.