HP ProCurve Wireless 170wl User Manual page 6

Using an External Antenna with the 170wl Radio Card
Pre-Installation Considerations
4
• For optimum coverage, mount the antenna at the center of the area
with a line-of-sight path to all points within the area.
• Avoid mounting next to or near building support columns or other
obstructions that may cause reduced signal or null zones in parts of
the coverage area.
• When mounting outdoors using a mast, make sure the antenna
extends beyond the top of the mast.
Directional Antennas - Consider these factors when selecting a location
for these antennas:
• For optimum coverage, mount the antenna above any obstructions,
directed at the center of the coverage area sector.
• High-gain directional antennas provide a flattened radio coverage
pattern in the horizontal plane. Use the tilting or articulated mounts
to point the antennas towards the coverage area.
Outdoor Installation - When installing an antenna outdoors, be sure to
consider these additional factors:
• Always place the antenna away from power and telephone lines.
• Ensure the antenna, any supporting structure, and cables are all
properly grounded.
• For lightning protection, it is highly recommended to use a lightning
arrestor immediately before the cable enters the building.