Specifications

RF Specifications provides the RF Specifications.

Mechanical, Environmental, and Other Specifications provides the Mechanical, Environmental, and Other Specifications.

Note : While many antenna datasheets emphasize peak gain, in most outdoor applications gain at horizon is much more important. For low profile antennas from any vendor, it is important to evaluate gain at horizon prior to selecting the antenna for deployment.

Table 1 RF Specifications

Note 1 : Antenna has been designed and tested to have excellent performance with and without a ground plane over the full 860-928MHz frequency range. It can be installed on a metallic or non-metallic surface. RF parameters in the table are provided for both cases of ground plane vs no ground plane.

Note 2 : Peak gain of monopole antennas installed on a finite size ground plane will not be at horizon, and will be elevated above the horizon. In contrast, typical terrestrial radio deployments with omni-directional antennas involve communications near the horizon. Therefore, in the most common deployment scenarios the gain at horizon is a more useful parameter than peak gain.

Note 3 : The minimum horizon gain specification shows whether an antenna has radiation nulls in azimuth. Nulls are directions in which the antenna has poor gain (e.g. -6dBi, -10dBi, -20dBi or worse), and nulls often result in severe transmit and receive signal loss in the direction of the null. The ANT-UN-MP-OUT-QMA antenna has a smooth horizon or azimuth radiation pattern, and does not have azimuth pattern nulls. When evaluating omni-directional antennas, it is important to ensure that the antenna pattern does not have nulls in azimuth, to ensure good transmission and reception signal quality in all directions at horizon.

Note 4 : All provided RF specifications include the RF loss of the integrated 5 foot cable.

Table 2 Mechanical, Environmental, and Other Specifications

Note 1 : Antenna data sheets often claim lightning protection, while in reality only providing a DC ground path for ESD protection. Cisco recommends use of a dedicated, high quality lightning arrestor for all antennas potentially exposed to lightning strikes.

Vandal Resistance

Antenna has been specifically designed to withstand opportunistic direct impacts from all angles, from more commonly carried vandalism objects or tools, such as aluminum or wooden baseball bats, skateboards, scooters, small knives and similar objects, assuming proper installation of the antenna on a flat surface.

Antenna is not resistant to damage caused by intentional or unintentional tampering with professional tools used in isolation or in combination, such as long (e.g. 40") steel crowbars or pry bars, power drills, welding torches, axes, chainsaws, heavy duty sledge hammers and similar.

Additionally, while the antenna is resistant to occasional, opportunistic, impulsive vandalism with common items - it should be understood that a persistent, skilled and focused individual with the right common tools and given enough time will be able to damage or tamper with the antenna.

Dimensions

Dimensions shows the Antenna Dimensions.

Figure 2 Dimensions

NOTE : Antenna Dimensions are shown in millimeters, except where explicitly specified in inches denoted by " or [ ].

Tools and Equipment Required

In addition to the parts included in the antenna kit, you must provide the following tools to install the antenna on the router:

■1-5/16" (1.3125"), or 33.34mm open-end wrench. Recommended torque is 50-65 ft-lb or 68-88 Nm.

■McMaster Carr Double-D Hole Punch P/N 3449A85 or equivalent. Alternatively, you can drill or use a circular hole punch to create a 0.91" diameter hole.

Mounting Components

Table 3 Antenna Mounting Components

Figure 3 Mounting Nut and Washer

Mounting the Antenna

A clean, flat surface at least 15 x 15 cm (6 x 6 in.) in area is required for mounting the antenna. Antenna mounting stud has a Double-D cross-section compatible with the McMaster Carr Double-D Hole Punch P/N 3449A85. The Double-D prevents antenna from rotating while the mounting nut is torqued. It also provides additional vandal resistance by not allowing the antenna to rotate around the axis.

Follow these instructions to mount the antenna. See Antenna Placement on Electrical Enclosures for a conceptual mounting illustration.

1. Mark the desired location where you plan to mount the antenna, and create a hole through the surface using a McMaster Carr Double-D Hole Punch P/N 3449A85, or equivalent punch tool. Alternatively, it is possible to drill a circular hole 0.91" in diameter.

2. Thread the cables through the hole and insert the Double-D mounting stud into the hole. Ensure that the gasket on the underside of the antenna sits flush against the mounting surface.

3. Place the metal washer and the metal nut onto the stud. Tighten the nut to a torque of 50-65 ft-lb or 68-88 Nm.

Antenna Placement on Electrical Enclosures shows the vandal resistant antenna mounted to a matching color outdoor electrical utility enclosure of a simple rectangular box shape. Many outdoor enclosures come in much more complicated shapes, with a number of rectangular boxes and compartments joined together. In general, it is recommended that the antenna be installed on the highest surface of the electrical enclosure box. In this manner, the radiation in the upper hemisphere is not obstructed by other nearby geometrical features of the enclosure.

In many deployments the nodes need to communicate to other nodes located near horizon. Placing the antenna on the highest enclosure surface is a good way to ensure that horizon communication is not obstructed. If it is not possible or feasible to place the antenna on the highest surface of the enclosure, please contact your Cisco account representative for support or 3rd party qualified RF (radio-frequency) professional with experience in antenna installation and siting.

Figure 4 Antenna Placement on Electrical Enclosures

Using the McMaster Carr Stud Driven Hole Punch

This section describes the McMaster Carr Stud Driven Hole Punch for 0.76" Long, 0.91" Wide Double-D Shape. Information in this section is adapted by Cisco and published with written permission from McMaster Carr Supply Company. In duplicating the information Cisco seeks to achieve an antenna datasheet that is standalone, and seeks to ensure that if the 3449A85 McMaster product is changed or discontinued, a copy of the original information is available with the ANT-UN-MP-OUT-QMA antenna datasheet.

Note: Cisco is providing 3449A85 information for reference purposes only, and does not sell, distribute or provide technical support for the 3449A85 punch tool. For technical support and the most up to date information please contact McMaster Carr, and reference the information located in the McMaster Carr 3449A8 datasheet.

Also known as chassis punches, these tools cut through sheet metal to create holes for installing switches and instruments. They have an automatic centering design for accurate alignment. Drill pilot holes slightly larger than the size of the stud. All punches can be used with a manual wrench or hydraulic driver, but require a stud adapter (sold separately) when used with a hydraulic driver.

Figure 5 McMaster Carr Stud Driven Hole Punch

Table 4 Tool Details

Safety Precautions

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!

For your safety, read and follow these safety precautions.

■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.

■Before you install an antenna, contact your Cisco account representative to explain which mounting method to use for the size and type of antenna that you are about to install.

■Find someone to help you—installing an antenna is often a two-person job.

■Select your installation site with safety, as well as performance, in mind. Remember that electric power lines and phone lines look alike. For your safety, assume that any overhead line can kill you.

■Contact your electric power company. Tell them your plans and ask them to come look at your proposed installation.

■Plan your installation carefully and completely before you begin. Each person involved in an installation 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.

■When installing your antenna, follow these guidelines:

–Do not use a metal ladder.

–Do not work on a wet or windy day.

–Do dress properly—wear shoes with rubber soles and heels, rubber gloves, and a long-sleeved shirt or jacket.

■If the assembly starts to drop, move away from it and let it fall. Because 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.

■If any part of the antenna system should come in contact with a power line, do not touch it or try to remove it yourself. Call your local power company to have it removed safely.

■If an accident should occur with the power lines, call for qualified emergency help immediately.