Instrukcja obsługi Shure UA874Z

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General Description

The Shure UA874 uses a log periodic dipole array to offer enhanced reception

when directed toward the desired coverage area. Anintegrated amplifier and

four gain settings compensate for varying degrees of coaxial cable signal

loss. The UA874 can be mounted on a microphone stand, suspended from

the ceiling, or mounted to a wall using the integrated swivel adapter.

Features

•Low-noise signal amplifier compensates for insertion loss incoaxial cable

•Compatible with Shure wireless receiversand antenna distribution sys-

tems that provide 10–15 V DC bias

•Integrated threaded adapter mounts easily to microphone stands

•Four-position gainselectorswitch

•Shure quality,ruggedness, and reliability

Note:will not operate The antennawithout 10-15 V DC bias. This is required

even at -6 dB and 0 dB ("passive") gain settings.

Installation

•Connect the antenna to the receiver or distributionsystemusing Shure

antenna cables (or any50ohm, low-losscoaxial cable, suchasRG-8U).

•The antenna only operates with receivers or distribution systems that

provide 10–15 V DC bias.

•Lower the gain setting for short cable runs, or increase gain for longer

runs. Note that the quality of the cable, not just the length, contributes

to signal loss. A lighter-grade 50 foot cable may require more gain than

a 100 foot,low-loss cable.Contact thecable manufacturerfor cable loss

specifications.

•Directtheantennatoward theintended coveragearea.

•Donot use this antenna for transmitting (such as with PSMtransmitters)

Cable Maintenance

To maintain top performance for antenna cables:

•Avoid sharp bends or kinks in the cables.

•Do notdeformcableswith makeshiftclamps,suchas bendinganailover

the cable.

•Do not use in permanent outdoor installations.

•Do not expose to extreme moisture.

Selecting Antenna Cables

Use50 ohmlow-loss coaxial cable,such asRG-8U.Shure offers pre-termi-

nated antenna cables ranging from 6 to 100 feet.

NOTE: When ordering cables from Shure, select the low-loss "Z" models

(available for longer cables) when usingfrequency bandsabove 1000 MHz.

Interface

① Gain Switch

Adjustthe four-position gain switch to compensate for the calculated cable loss, based on the length and type of cable.

Caution: There may be a small RF dropout when changing the gain setting.

1/4©2017 Shure Incorporated

UA874Z

Active Directional Antenna

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