Table Of Contents
Cisco Aironet 14-dBi Patch Antenna (AIR-ANT5114P-N)
This document outlines the specifications for the Cisco Aironet 14-dBi Patch Antenna (AIR-ANT5114P-N) and provides instructions for mounting it. The antenna operates in the 4.9 to 5.8-GHz frequency range and is designed for use in both indoor and outdoor environments.
The following information is provided in this document.
The following table indicates the minimum required attenuation between the access point radio and the antenna when using the lowest RF power setting. Using a higher RF power setting will require additional attenuation (for a given antenna).
The attenuation can be in the form of an attenuator, coax cable loss, or both. This attenuation is required for the system to meet the regulatory requirements of the indicated country. Failure to install the minimum amount of attenuation results in non-compliant operation. Table 1 shows the required attenuation.
Note X indicates that the antenna is not authorized to be used in that country.
This antenna is designed for use with Cisco Aironet access points and bridges but can be used with any 5-GHz Cisco Aironet radio device that uses N-connectors.
Translated versions of the following safety warnings are provided in the Safety Warnings for Cisco Aironet Antennas, which is available at http://www.cisco.com.
Warning Installation of this antenna near power lines is dangerous. For your safety, follow the installation directions.
Each year hundreds of people are killed or injured when attempting to install an antenna. In many of these cases, the victim was aware of the danger of electrocution but did not take adequate steps to avoid the hazard.
For your safety, and to help you achieve a good installation, please read and follow these safety precautions. They may save your life!
1. If you are installing an antenna for the first time, for your own safety as well as others, seek professional assistance. Your Cisco sales representative can explain which mounting method to use for the size and type antenna you are about to install.
2. Select your installation site with safety as well as performance in mind. Remember: electric power lines and phone lines look alike. For your safety, assume that any overhead line can kill you.
3. Call your electric power company. Tell them your plans and ask them to come look at your proposed installation. This is a small inconvenience considering your life is at stake.
4. Plan your installation carefully and completely before you begin. Successful raising of a mast or tower is largely a matter of coordination. Each person should be assigned a specific task, and should know what to do and when to do it. One person should be in charge of the operation to issue instructions and watch for signs of trouble.
5. When installing your antenna, remember:
a. Do not use a metal ladder.
b. Do not work on a wet or windy day.
c. Do dress properly—shoes with rubber soles and heels, rubber gloves, long sleeved shirt or jacket.
6. If the assembly starts to drop, get away from it and let it fall. Remember, the antenna, mast, cable, and metal guy wires are all excellent conductors of electrical current. Even the slightest touch of any of these parts to a power line completes an electrical path through the antenna and the installer: You!
7. If any part of the antenna system should come in contact with a power line, don't touch it or try to remove it yourself. Call your local power company. They will remove it safely.
8. If an accident occurs with the power lines, call for qualified emergency help immediately.
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:
•Install the antenna vertically and mount it as high as possible.
•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 a building's construction determines the number of walls the signal can pass through and still maintain adequate signal strength. Consider the following before choosing the location for your antenna:
–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 will likely reflect off a thick metal wall and may not penetrate it at all.
–Signals will likely reflect off a chain link fence or wire mesh spaced between 1 and 1 1/2 in. (2.5 and 3.8 cm). The fence acts as a harmonic reflector that blocks the signal.
•Install the antenna away from microwave ovens and 2-GHz cordless phones. These products can cause signal interference because they operate in the same frequency range as the device to which your antenna is connected.
Choosing a Mounting Location
The antenna is designed to create a directional broadcast pattern. To achieve this pattern, the antenna should be mounted clear of any obstructions to the sides of the radiating element. If the mounting location is on the side of a building or tower, the antenna pattern is degraded on the building or tower side.
Before attempting to install your antenna, determine where you can best place the antenna for safety and performance.
Follow these steps to determine a safe distance from wires, power lines, and trees.
Step 1 Measure the height of your antenna.
Step 2 Add the height to the length of your tower or mast and then double this total for the minimum recommended safe distance.
Caution If you are unable to maintain this safe distance, stop and get professional help.
Generally, the higher an antenna is above the ground, the better it performs. Good practice involves installing your antenna about 5 to 10 ft (1.5 to 3 m) above the roof line and away from all power lines and obstructions. If possible, find a mounting place directly above your wireless device to ensure the lead-in cable can be as short as possible.
Installing the Antenna
You can install the antenna on any flat vertical surface or on a pole. Hardware for mounting the antenna on drywall is provided. If you intend to install your antenna on another surface, you must provide the appropriate hardware.
Note Four mounting screws are provided to mount the antenna. To ensure a safe, reliable, and long-standing installation, you must use all four screws to mount the antenna.
Tools and Equipment Required
A mounting installation kit is included with the antenna and consists of the following hardware:
•Four #8 x ¾ in. screws and four #8 plastic wall anchors
•Wall mount plate
•Two 1/4 in.-20 azimuth and elevation adjustment bolts and nuts with 1/4 in. flat washers and lock washers
•Two hose clamps
You need the following tools and equipment, which are not provided.
•A #2 Phillips screwdriver
•A 1/4" Flat-head screwdriver
•A #29 0.136-in. (3.45 mm) drill bit for drywall installation; other surfaces may require a different size
•A small mallet or hammer
Mounting on a Vertical Surface
Follow these steps to mount your antenna on a vertical surface. This procedure describes mounting the antenna on a drywall surface. If you are mounting the antenna on any other type of surface, your procedure may vary slightly.
Step 1 Determine the mounting location for the antenna.
Step 2 Use the articulated mount base as a template to mark the locations of the four mounting holes.
Step 3 Use a drill and a 3/16 in. drill bit to drill four holes at the locations you marked in Step 2.
Step 4 Start a plastic wall anchor into each hole.
Step 5 Use a mallet or small hammer to seat the wall anchors into the wall.
Step 6 Align the articulated mount base's mounting holes with the anchors.
Figure 1 Wall Mounting
Figure 2 shows, in inches, the distance between the bracket mounting holes.
Figure 2 Distance Between Bracket Mounting Holes
Step 7 Start a 8-18 self-tapping screw into each antenna mounting hole.
Step 8 Use a Phillips screwdriver to secure the articulated mount base to the wall. Do not overtighten.
Step 9 Complete the assembly of the other parts as described beginning in step 3 of the following section.
Installing the Articulated Mount
The antenna is mounted on an articulated mounting device as shown in Figure 3. The articulated mount is used to provide a way to adjust the antenna elevation and azimuth through a limited range.
Figure 3 Articulated Mount Details
Articulated mount base
Antenna mounting plate
Azimuth adjustment bolt
Elevation adjustment bolt
Figure 3 shows the articulated mount installed on a pole. You can also install it on any suitable flat surface, as mentioned in the previous section.
Follow these steps to install the articulated mount on an upright pole:
Step 1 Place hose clamps around the pole and the articulated mount base as shown.
Step 2 Position the mounting plate on the pole in the direction the antenna should face and tighten the hose clamp with a screwdriver.
Step 3 Use the azimuth adjustment bolt, nut, and washers to install the knuckle assembly on the articulated mount base. Tighten the screw finger tight.
Step 4 Use the elevation adjustment bolt to attach the antenna mounting plate and antenna to the knuckle assembly. Tighten the screw finger tight.
Step 5 Use the azimuth and elevation adjustments to fine tune the antenna's azimuth and elevation.
Step 6 When the antenna is properly adjusted, use a flat-head screwdriver to tighten the azimuth and elevation adjustment screws. Do not overtighten.
Step 7 Route the antenna cable to the wireless device.
Note Cisco recommends grounding the antenna. See the "Grounding the Antenna" section for details.
Caution If you install additional lengths of antenna cable, be sure to install a suitable strain relief. The antenna may be damaged if you do not eliminate the extra weight of the cable. The antenna is not designed to support the weight of a cable longer than the installed cable.
Cisco recommends a high-quality, low-loss cable for use with the antenna.
Note Coaxial cable loses efficiency as the frequency increases, resulting in signal loss. Because cable length also determines the amount of signal loss, the cable should be kept as short as possible (the longer the run, the greater the loss).
The antenna terminates with an N-connector after a short, 1-ft (30.5-cm) cable. The mating connector to the antenna is an appropriate N-connector jack. The connector on the opposite end will vary according to the type of equipment used.
After the cable is attached to the antenna, make sure that the connections are sealed (if outdoors) to prevent moisture and other weathering elements from affecting performance. Cisco recommends using a coax seal (such as CoaxSeal) for outdoor connections. Silicon sealant or electrical tape are not recommended for sealing outdoor connections.
Grounding the Antenna
Follow these steps to ground the antenna in accordance with national electrical code instructions.
Step 1 Use No. 10 AWG copper or No. 8 or larger copper-clad steel or bronze wire as ground wires for both mast and lead-in. Securely clamp the wire to the bottom of the mast.
Step 2 Secure the lead-in wire to a static discharge unit (lightning arrestor, Cisco Aironet AIR-ACC245LA-R or equivalent).
Step 3 Secure the mast ground wire to the building with stand-off insulators spaced from 4 ft (1.2 m) to 8 ft (2.4 m) apart.
Step 4 Mount the antenna discharge unit as closely as possible to where the lead-in wire enters the building.
Step 5 Drill a hole in the building's wall as closely as possible to the equipment to which you will connect the lead-in cable.
Caution There may be wires in the wall. Make sure your drilling location is clear of any obstructions or other hazards.
Step 6 Pull the cable through the hole and form a drip loop close to where it enters the building.
Step 7 Thoroughly waterproof the lead-in area.
Step 8 Connect the lead-in cable to the equipment.
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see What's New in Cisco Product Documentation at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html.
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