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
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.
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).
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©2016 Shure Incorporated
UA834
In-Line Antenna Amplifier
