Cisco Aironet AIR-ANT2414S-R Manual de usuario

Corporate Headquarters:

Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA

Cisco Aironet 14-dBi Vertically Polarized Sector

Antenna (AIR-ANT2414S-R)

This document outlines the specifications, describes the AIR-ANT2414S-R 14-dBi vertically polarized

sector antenna, and provides instructions for mounting and aligning it. The antenna operates in the

2.4-GHz frequency range and is designed for use in bridging environments. The antenna is designed to

be used outdoors and can be mounted on 1.5 in. (3.8 cm) to 2.5 in. (6.3 cm) diameter masts.

The following information is provided in this document.

•Technical Specifications, page 2

•System Requirements, page 3

•Safety Precautions, page 3

•Installation Notes, page 4

•Obtaining Documentation and Submitting a Service Request, page 11

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Technical Specifications

Antenna type 90-degree sector

Operating frequency range 2400–2500 MHz

Nominal input impedence 50Ω

2:1 VSWR bandwith 2400–2500 MHz

Gain (including 1.5 m cable) 14 dBi

Polarization Linear, vertical

Azimuth 3-dB beamwidth 90 degrees

Elevation 3-dB beamwidth 8.5 degrees

Cable length and type 5 ft. (1.5 m)

LMR-195 coaxial

Connector type RP-TNC Male

Environment Outdoor

Length 35.9 in. (91.2 cm)

Width 6.4 in. (16.3 cm)

Depth 4.03 in. (10.23 cm)

Weight (with hardware kit) 7.5 lb. (3.4 kg)

Operating temperature range –22°F to 158°F)

(–30°C to 70°C

Storage temperature range –40°F to 185°F

(–40°C to 85°C)

Wind rating 100 mph

(161 kph)

H-Plane Radiation Pattern E-Plane Radiation Pattern

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System Requirements

This antenna is designed for use with Cisco Aironet access points and bridges but can be used with any

2.4-GHz Cisco Aironet radio device that utilizes an RP-TNC connector.

Note To meet regulatory restrictions, if you are using this antenna with a Cisco Aironet 1300 Series Wireless

Bridge, the antenna must be professionally installed. The network administration or other IT professional

responsible for installing and configuring the unit is a suitable professional installer. Following installation,

access to the unit should be password protected by the network administrator to maintain regulatory

compliance.

Safety Precautions

Warning

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you

work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar

with standard practices for preventing accidents.

Warning

Do not work on the system or connect or disconnect cables during periods of lightning activity.

Warning

This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the

absence of a suitably installed ground conductor. Contact the appropriate electrical inspection

authority or an electrician if you are uncertain that suitable grounding is available.

Warning

Do not locate the antenna near overhead power lines or other electric light or power circuits, or

where it can come into contact with such circuits. When installing the antenna, take extreme care

not to come into contact with such circuits, as they may cause serious injury or death. For proper

installation and grounding of the antenna, please refer to national and local codes (e.g. U.S.:NFPA 70,

National Electrical Code, Article 810, in Canada: Canadian Electrical Code, Section 54).

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.

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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 to 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 complete 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 should occur with the power lines call for qualified emergency help immediately.

Installation Notes

The antenna is designed to be mounted on a mast but can be mounted on most flat vertical surfaces. If

you mount the antenna on a vertical surface using the mounting hardware provided, you can adjust the

antenna’s elevation but not its azimuth. Therefore, the surface on which you mount the antenna must be

oriented in the direction of the bridge link.

Choosing a Mounting Location

The antenna is designed to create a directional broadcast pattern. To achieve this pattern, mount the

antenna 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.

Site Selection

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 this length 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.

Cisco Aironet 14-dBi Vertically Polarized Sector Antenna (AIR-ANT2414S-R)

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Generally, the higher an antenna is above the ground, the better it performs. Good practice is to install

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 so that the lead-in

cable can be as short as possible.

Hardware, Tools, and Fasteners Required

A mast mounting installation kit is shipped with the antenna and consists of the following hardware.

•Upper mounting bracket (adjustable)

•Lower mounting bracket (fixed)

•Mast mount clamps

•Four 4.0-in. (10.1 cm) ¼-20 hex head bolts with flat washers, split lock washers, and hex nuts

•Four ¾-in. (1.9 cm) ¼-20 hex head bolts with flat washers, split lock washers, and hex nuts

•Four ¼-20 hex nuts with split lock washers

You will need two 7/16-in. deep well sockets or wrenches to install the antenna. Figure 1 shows the

mounting bracket assembly.

Installation Process

The following sections contains typical procedures for installing the antenna on a mast. Your installation

may vary. The process consists of the following procedures.

•Assembling the mounting brackets

•Attaching the mounting brackets to the antenna

•Mounting the antenna

•Aligning the antenna

•Grounding the antenna

Before you begin, refer to Figure 1 and Figure 2 to become familiar with the installation.

Assembling the Mounting Brackets

Two mounting brackets are provided; one is adjustable and the other is not. Figure 1 shows the adjustable

bracket. The assembly process is the same for both brackets. Follow these steps to assemble the

mounting brackets.

Step 1 Position the mast mount clamp plate inside the antenna bracket.

Step 2 Insert two ¼-20x ¾-in. hex head bolts into the holes in the mast mount clamp plate facing outward as

shown in Figure 1.

Step 3 Place a flat washer and split lock washer on each hex head bolt.

Step 4 Start a ¼-20 hex nut on each hex head bolt and tighten hand tight.

Step 5 Place a flat washer on two 4-inch ¼-20 hex head bolts.

Step 6 Insert the bolts into the holes facing outward in the mast mount clamp plate.

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Step 7 Install two mast mount clamps on the 4-inch ¼-20 hex head bolts as shown in Figure 1.

Step 8 Install a ¼-20 split lock washer and hex head nut on each bolt and tighten hand tight.

Step 9 Go to Step 1 and assemble the second mounting bracket.

Figure 1 Mounting Bracket Assembly

Attaching the Mounting Brackets to the Antenna

The antenna has studs onto which you attach the installed mounting brackets to it. The adjustable bracket

is installed on the top set of studs. Follow these steps to attach the mounting brackets to the antenna.

Step 1 Position the antenna so that the arrow on the orientation label is pointed up. The arrow points to the top

of the antenna so that it can be installed correctly.

Note The orientation label is located on the back panel of the antenna.

Step 2 Attach the adjustable mounting bracket to the top set of mounting studs.

Step 3 Install two split lock washers and hex nuts on the studs. Use a 7/16-in. socket or wrench to tighten the

nuts. Do not overtighten.

Step 4 Attach the non-adjustable mounting bracket on the bottom set of mounting studs.

Step 5 Install two split lock washers and hex nuts on the studs and tighten as described in Step 3.

1Antenna bracket (adjustable bracket shown) 5Hex head bolt

2¼-20 x ¾-in (1.9 cm) hex head nut 6¼-20 x ¾-in (1.9 cm) hex head bolt

3Mast mount clamp plate 7¼-20 x 4-in hex head bolt details

4Mast mount clamp

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Step 6 Use an appropriate socket or wrench to tighten the mounting bracket fasteners except the mast mount

clamp fasteners.

a. Use a 7/16-in socket or wrench to capture the hex head bolt while you tighten the nuts.

b. Do not complete tighten the nuts. Tighten them just enough so the bracket remains positioned but

can be moved if necessary.

Mounting the Antenna

Figure 2 shows side and rear view of a typical mast installation. Note that the adjustable bracket is in the

top position. Depending on how your mast is configured, you may need to remove one of the mast mount

clamps in order to mount the antenna.

Figure 2 Antenna Mounting Details

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Follow these steps to mount the antenna on the mast. Make sure you follow all safety precautions that

are appropriate for your installation.

Step 1 Position the antenna on the mast so that the inside mast mount clamps are making good contact with the

mast.

Step 2 If you removed the outside mast mount clamp on the top bracket, reinstall it now. Make sure you have

retained the ¼-20 flat washers and split lock washers on the hex head bolts and start a ¼-20 hex nut on

each bolt.

Step 3 Use a 7/16-in. deep well socket or wrench to tighten the nuts. Tighten the nuts enough so that the antenna

will not slip down the mast. See Figure 3.

Figure 3 Mast Mount Clamp Detail

Step 4 If you removed the outside mast mount clamp on the bottom bracket, reinstall it now. Make sure you

have retained the ¼-20 flat washers and split lock washers on the hex head bolts and start a ¼-20 hex nut

on each bolt.

Step 5 Use a 7/16-in. deep well socket or wrench to tighten the nuts. Do not completely tighten the nuts.

Step 6 Rotate the antenna so that it points in the direction of the link you intend to establish.

Aligning the Antenna

The antenna must be properly aligned if it is to be effective and efficient. If you are using this antenna

with the Cisco Aironet 1300 Series Wireless Bridge, a detailed alignment procedure is contained in the

Cisco Aironet 1300 Series Bridge Mounting Instructions, which is available on Cisco.com. The antenna

must also be professionally installed if it is to be used with the 1300 series bridge.

Note Polarization for the antennas you are aligning must be the same.

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The goal when positioning a directional antenna is to align the local antenna for maximum received

signal strength using the LED indications. The LEDs are convenient and easy to use. Normally, you

observe a single large peak as you pan the antenna across the signal path. Think of the receive signal as

a target (see Figure 4).

Figure 4 Signal Strength Target

The target consists of concentric rings, with the strongest signal at the center and a progressively weaker

signal at the outer rings. As you scan across the signal, you should observe the strong signal level when

the antenna is properly aligned. If a vertical adjustment is required, look for the strong signal level as

you tilt the antenna through its range.

Positioning the Antenna Using LED Indications

You can position the integrated antenna or a directional external antenna using the LEDs only after the

bridge successfully associates with the remote bridge. In installation mode, the Install LED is continuous

amber or green when the bridge has successfully associated. For the first 20 seconds following

association, the bridge reads the received signal strength indication (RSSI) levels from the received

packets and records the maximum value. After 20 seconds, the Ethernet, status, and radio LEDs on the

bridge indicate relative RSSI readings (see Table 1) compared to the maximum recorded during the

initial 20 seconds.

1Weak signal level 3Strong signal level

2Moderate signal level

Horizontal

Vertical

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Table 1 Install Mode RSSI Display

Signal Level (dBm) Ethernet LED Status LED Radio LED

–44 or stronger On On On

–47 to –44 Fast blink1On On

–50 to –47 Medium blink2On On

–53 to –50 Slow blink3On On

–54 to –53 Off On On

–57 to –54 Off Fast blink On

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When you are using LEDs to maximize the signal, adjust the antenna until as many LEDs as possible are

on and the rest are blinking as fast as possible. With all three LEDS on, the signal is good enough to

support the maximum data rate.

To position the antenna using the LED indicators, follow these steps:

Step 1 Verify that the Install LED is either continuous amber or green.

Step 2 Slowly pan the bridge to the left and right of the signal path, and watch for peaks in signal strength. Be

sure to swing the antenna in an arc of 45 degrees to each side to ensure that the passes through the

strongest signal level.

Step 3 Return the bridge to the position where the signal is strongest.

Step 4 Secure the horizontal adjustment by tightening the hex head bolts on the antenna bracket. Tighten the

nuts wrench tight. Do not overtighten.

Step 5 Slowly tilt the antenna, and watch for a peak in signal strength. Use the full vertical adjustment range of

the mounting brackets.

Step 6 Return the bridge to the position where the signal is strongest, normally where all signal strength LEDs

are on. If you are unable to turn on all LEDs, simply maximize the signal.

Step 7 Secure the vertical adjustment by tightening the nuts that secure the adjustable antenna bracket to the

mast mount clamp plate wrench tight. Do not overtighten.

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 an antenna discharge unit and 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 3 Mount the antenna discharge unit as close as possible to where the lead-in wire enters the building.

–60 to –57 Off Medium blink On

–63 to –60 Off Slow blink On

–66 to –63 Off Off On

–69 to –66 Off Off Fast blink

–72 to –69 Off Off Medium blink

–75 to –72 Off Off Slow blink

–75 or weaker Off Off Off

1. Blinks once per second.

2. Blinks twice per second.

3. Blinks four times per second.

Table 1 Install Mode RSSI Display (Continued)

Signal Level (dBm) Ethernet LED Status LED Radio LED

Tabla de contenidos

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