Cisco 4G-ANTM-OM-CM, Manual

Page: 95 / 535

95
Cisco 4G/3G Omnidirectional Dipole Antenna (4G-LTE-ANTM-D)
Follow these guidelines to ensure the best possible performance:

When used on an EHWIC, always mount the antenna on an appropriate extension cable and antenna stand. The antenna
performance will not be optimal if mounted directly to an EHWIC. Mounting directly to a fixed router (without an EHWIC) is
allowed.

Space multiple antennas apart by at least 17 inches (43 cm). Interference may occur when placed closely together.

Observe the radiation patterns in Figures 2 through 7 to position the antennas for best coverage.

Wherever possible, mount the EHWIC and antenna where the wireless devices are within sight and without physical
obstructions. Barriers along the line of sight between the device and the local base station will degrade the wireless radio
signals. EHWICs and antennas should be installed above floor level in office environments or near the ceiling for better
performance because most obstructions tend to be near floor level.

The density of the materials used in a building’s construction determines the number of walls the signal must pass through
while still maintaining adequate coverage. Consider the following before choosing the location for installing your antenna:
— Paper and vinyl walls have very little effect on signal penetration.
— Solid and precast concrete walls limit signal penetration to one or two walls without degradation of coverage.
— Concrete and wood block walls limit signal penetration to three or four walls.
— A signal can penetrate five or six walls constructed of drywall or wood.
— A thick metal wall or wire-mesh stucco wall causes signals to reflect back and causes poor penetration.

Avoid mounting the antenna next to a column or vertical support that could create a shadow zone and reduce the coverage
area.

Keep the antenna away from reflective metal objects such as heating and air-conditioning ducts, large ceiling trusses,
building superstructures, and major power cabling runs. If necessary, use an extension cable to relocate the antenna away
from these obstructions.
Caution : Install the EHWIC and any antennas away from appliances that share the same frequency bands. Microwave ovens,
cordless telephones, and security monitors can temporarily interfere with wireless performance.
Caution : We recommend avoiding installing wireless antennas in or near rack-mounted equipment that include networking
equipment and computer servers whose radiated noise emissions can severely degrade radio performance.
Note : If the desired installation site has a marginally acceptable level of radiated noise emissions, consider using a
remote-mounted antenna, such as a wall-mount or ceiling-mount antenna, for better radio performance and coverage.
Safety Instructions
Follow these safety instructions when installing your antenna.
Warning : I n order to comply with FCC radio frequency (RF) exposure limits, antennas should be located at a minimum of
7.9 inches (20 cm) or more from the body of all persons. Statement 332
Warning : This equipment must be connected to an indoor antenna only. Statement 373

Plan your installation procedure carefully and completely before you begin.

If you are installing an antenna for the first time, for your own safety as well as that of others, seek professional assistance .
Consult your dealer, who can explain which mounting method to use for the location where you intend to install the antenna.

Choose your installation site with both safety and performance in mind.