Shure UA834 User manual

UA834
In-Line Antenna Amplifier
The Shure UA834 in-line antenna amplifier user guide.
Version: 3.1 (2022-E)

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Table of Contents
UA834 In-Line Antenna Amplifier 3
General Description 3
Features 3
Indicators and Settings 3
RF Overload 3
Installation 4
Cable Maintenance 5
Selecting Antenna Cables 5
Antenna Placement 5
Find More Information Online 6
Setting Gain 6
Calculating Gain Settings 6
Specifications 6
Certifications 8

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UA834 
In-Line Antenna Amplifier
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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.
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 TO ANTENNA input) is too strong. 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.

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WhenthereisanRFoverloadindicatorontheinlineamplifier,theamplifiermightnotbenecessary,oritshouldbeplacedfur
ther 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).
Attach the antenna to the connector labeled TO ANTENNA

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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.
NOTE: When ordering cables from Shure, select the low-loss "Z" models (available for longer cables) when using frequency bands above 1000 MHz.

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Antenna Placement
Use the following guidelines when mounting antennas:
Antennas and receivers must be from the same band.
Mount antennas at least one wavelength (two feet) apart.
Position antennas so there is nothing obstructing a line of sight to the transmitter (including the audience).
Keep antennas away from metal objects.
Important: Always perform a "walk around" test to verify coverage before using a wireless system during a speech or performance. Experiment with antenna
placement to find the optimum location. If necessary, mark "trouble spots" and ask presenters or performers to avoid those areas.
Find More Information Online
For more information, visit http://www.shure.com
Setting Gain
The gain setting should only be used to compensate for the calculated cable signal loss. Additional signal gain does not mean
betterRFperformance.Toomuchgainactuallyreducesreceptionrangeandthenumberofavailablechannels.Thisisbe
cause Shure receivers are optimized to deliver the best performance when the sum of signal gain and cable loss equals 0 dB.
AdditionalgainjustamplifieseverythingintheRFrange—includinginterferenceandambientRFnoise.Itcannotselectivelyin
crease the signal from the transmitter.
Use the lowest gain setting necessary to achieve good reception of the transmitter RF signal, as indicated on the
receiver’sRFLEDormeter.
Only increase the gain setting to compensate for the calculated cable loss.
The resulting signal level at the receiver (cable loss plus amplification) should be within ±5 dB of the original signal level at
the antenna.
Calculating Gain Settings
To calculate the required gain setting, obtain the cable manufacturer's specification for signal loss. The rated loss usually varies
with RF frequency in addition to cable length.
Multiplytheper100feetratingofthecablebycablelengthtodeterminesignalloss,andaddgainasnecessarytocompen
sate. For example: a 50 ft. cable with rated loss of -12dB per 100 ft. would calculate as (-12dB/100)*50 = -6dB and require
+6dB of gain for a sum total of 0 dB loss.

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Specifications
Frequency Range
UA834V 174–216MHz
UA834WB 470–902MHz
UA834XA 902–960MHz
UA834Z16 1240–1260MHz
UA834Z17 1492–1525MHz
UA834Z18 1785–1805MHz
Connector Type
BNC, Female
Impedance
50Ω
Power Requirements
10to15VDCbiasfromcoaxialconnection,0.60–0.72W
Signal Gain
±2dB,Switchable
+6dB
+12dB
Absolute Maximum RF Input
+5dBm
RF Overload LED Threshold
±2dB
5dBm
Input Third-Order Intercept Point (IIP3)
>10dBm
Housing
Cast Aluminum, black painted finish
Dimensions
67x32x112mm(HxWxD)
DimensionswithStand:108x32x112mm
Net Weight
Without Mounting Stand 0.28kg(9.8oz.)

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With Mounting Stand 0.42kg(14.8oz.)
Certifications
This product meets the Essential Requirements of all relevant European directives and is eligible for CE marking.
CE Notice: Hereby, Shure Incorporated declares that this product with CE Marking has been determined to be in compliance
with European Union requirements. The full text of the EU declaration of conformity is available at the following site: https://
www.shure.com/en-EU/support/declarations-of-conformity.
Authorized European importer:
Shure Europe GmbH
Department: Global Compliance
Jakob-Dieffenbacher-Str. 12
75031 Eppingen, Germany
Phone: [phone]
Fax: [phone]
Email: [email protected]