Cisco 4G-ANTM-OM-CM, Руководство пользователя, Страница: 374 / 535

374
Cisco Integrated 4G Low-profile Outdoor Saucer Antenna (ANT-4G-SR-OUT-TNC)
Before you install or replace antennas, make sure the router is:

Powered off

Disconnected from all power sources

Disconnected from the Field Area Network (FAN)

Removed from a pole-top installation
Optimum Performance
Antennas transmit and receive radio signals which are susceptible to RF obstructions and common sources of interference that
can reduce throughput and range of the device to which they are connected. Follow these guidelines to ensure the best possible
performance:

Keep the antenna away from metal obstructions such as heating and air-conditioning ducts, large ceiling trusses, building
superstructures, and major power cabling runs. If necessary, use a rigid conduit to lower the antenna away from these
obstructions.

The density of the materials used in surrounding buildings’ construction impacts antenna signal strength. Consider the
following
— Signals penetrate paper and vinyl walls with little change to signal strength.
— Signals penetrate only one or two solid and pre-cast concrete walls without degrading signal strength.
— Signals penetrate three or four concrete and wood block walls without degrading signal strength.
— Signals penetrate five or six walls constructed of drywall or wood without degrading signal strength.
— Signals are likely to reflect off a thick metal wall and not penetrate it at all.
— Signals are likely to reflect off a chain link fence or a wire mesh with spaces of 1 to 1-1/2 in. (2.5 to 3.8 cm). The fence
acts as a harmonic reflector that blocks the signal.

Microwave ovens and 2-GHz cordless phones can cause signal interference because they operate in the same frequency
range as the device to which your antenna is connected.

For instructions on installing or replacing a Cisco Connected Grid module, see the corresponding installation and
configuration guide for each module.

For detailed instructions on opening the door, see the installation guide of your router. Before installing the antenna
according to the
Installing the Antenna , you must complete these steps:
— Open the router chassis door.
— Remove any plug or connector that is installed in the antenna port.
— Verify the correct antenna port for installation, based on the antenna model you are installing.

See the installation document for your router regarding the correct antenna port location. Antennas must be installed in the
correct antenna port for ease of installation and optimal performance.
NOTE : Ensure that you are able to access the antenna port from inside the router. If an installed module prevents you from
reaching the antenna port, you might have to remove the module before installing the antenna, then reinstall the module. See
the corresponding module installation and configuration guide for each module.