D-Link DWL-AG520 Manual page 7

Installation Flexibility - Wireless technology allows the network to go where
wires cannot go.
Installation Considerations
Designed to go up to 1650 feet (~500 meters), D-Link DWL-AG520 lets you
access your network with your computer from virtually anywhere you want.
Keep in mind, however, that the number and thickness of walls, ceilings or
other objects that the wireless signals must pass thru may limit range.
Typical ranges vary depending on the types of materials and background RF
noise in your home or business. The key to maximizing range is to follow
these basic principles:
1. Keep the number of walls and ceilings between the Access Point and
your receiving device to a minimum - Each wall or ceiling can reduce
your D-Link Wireless product's range from 3-90 feet (1-30 meters.) For
some businesses or for a large residential home deployment, it may be
beneficial to have more than one access point with overlapping coverage.
2. Be aware of the direct line between Access Points and computers with
wireless adapters - A wall that is 1.5 feet thick (.5 meters), at a 45-
degree angle appears to be almost 3 feet (1 meter) thick. At a 2-degree
angle it looks over 42 feet (14 meters) thick! Try to make sure that the
Access Points and Adapters are positioned so that the signal will travel
straight through a wall or ceiling for better reception.
3. Building Materials make a difference - A solid metal door or aluminum
studs may have a negative effect on range. Try to position Access Points,
and computers with wireless adapters so that the signal passes through
drywall or open doorways and not other materials.
4. Make sure that the antenna is positioned for best reception by using the
software signal strength tools included with your product.
5. Keep your product away (at least 3-6 feet or 1-2 meters) from electrical
devices or appliances that generate extreme RF noise.