Shure UA834 Manual

Shure Mikrofon UA834

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Side 1/4

General Description

The UA834 provides more flexibility in wireless installations by increasing

the allowable length of cable runs between a receiver and antenna. Antennas

may be placed closer to the stage, or installed on ceilings and walls that

maintain a better line of sight with the transmitter.

Features

• Low-noise signal amplifier compensates for insertion loss in coaxial cable

• Compatible with Shure Wireless Systems. Also may be used with Shure

UA845 and UA844 Antenna Distribution Systems

• Integrated threaded adapter mounts easily to microphone stands or the

supplied surface-mount bracket

• Two-position gain selector switch

• LED indicator for RF signal overload

• Shure quality, ruggedness, and reliability

NOTE: Antenna amplifiers are intended to compensate for signal loss in ca-

bles, not for increasing the range of the antenna. Attempting to “boost” the

signal beyond nominal levels only results in overloading the circuit and reduc-

ing performance.

Indicators and Settings

①DC POWER RF OVERLOAD/

Green: Indicates it is receiving power from the antenna input on the receiver

or combiner.

Red: Signal from the antenna (at the input) is too strong.TO ANTENNA

Remove the inline amplifier or move it further down the cable run.

②GAIN

Set the gain switch to +6 dB for shorter cable runs, and +12 dB for longer

runs.

RF Overload

RF overload can occur at the input to the inline amplifier or at the input to the

receiver. An overload at either point degrades the signal.

When there is an RF overload indicator on the inline amplifier, the amplifier

might not be necessary, or it should be placed further down the cable run at

a midpoint between the antenna and receiver. The gain switch only affects

output gain, and cannot compensate for input overload at the amplifier.

If there is an RF overload signal on the receiver, reduce the gain on the inline

amplifier, or move it further up the cable run so there is more cable between

the receiver and the amplifier. Note that the overload level for the amplifier

might be greater than that for the receiver input, so it cannot be used to indi-

cate whether the signal will overload the receiver at that point in the cable

run.

Installation

Connect between the antenna and receiver (or antenna distribution system), as shown. The DC POWER LED illuminates green when the receiver is powered

on.

• Use Shure low-loss coaxial antenna cable (or any 50 ohm, low-loss cable.

• 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.

• Active antennas, such as the UA874, have a built-in amplifier, and may not require additional amplification.

Caution: Use only Shure antenna accessories to ensure the best operation. Do not use splitters, combiners, or antennas that provide a DC ground. If necessary,

use a BNC DC block device (compatible with the receiver RF band).

UA834

In-Line Antenna Amplifier