Shure UA834 User Manual

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

Indicators and Settings

① DC 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 TO ANTENNA input) is too strong.

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

② GAIN

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

UA834

In-Line Antenna Amplifier

• 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 ca­bles, not for increasing the range of the antenna. Attempting to “boost” the
signal beyond nominal levels only results in overloading the circuit and reduc­ing performance.

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 indi­cate 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).

1/4©2016 Shure Incorporated

TO ANTENNA

Attach the antenna to the connector labeled TO ANTENNA

TO RECEIVER

>50 ft.

>50 ft.

Shure IncorporatedUA834 In-Line Antenna Amplifier

Use the supplied surface-mount bracket on walls or ceilings, or mount on a standard microphone stand.

Use a maximum of two in-line antenna amplifiers for extremely long cable runs or for two runs of lighter-grade cable, as shown

Cable Maintenance

To maintain top performance for antenna cables:

• Avoid sharp bends or kinks in the cables.

• Do not deform cables with makeshift clamps, such as bending a nail over the cable.

• Do not use in permanent outdoor installations.

• Do not expose to extreme moisture.

Selecting Antenna Cables

Use 50 ohm low-loss coaxial cable, such as RG-8U. Shure offers pre-terminated antenna cables ranging from 6 to 100 feet.

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