NOTE:
When ordering cables from Shure, select the low-loss "Z" models (available for longer cables) when using frequency bands above 1000 MHz.
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.
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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 because Shure receivers are optimized to deliver the best
performance when the sum of signal gain and cable loss equals 0 dB. Addi-
tional gain just amplifies everything in the RF range—including interference
and ambient RF noise. It cannot selectively increase 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 compensate. For example: a 50
ft. cable with rated loss of -12dB per 100 ft. would calculate as
(-12dB/100)*50 = -6dB
and r6dB of gain for a sum total of 0
dB loss.
Specifications
Frequency Range
174–216 MHz
UA834V
470–902 MHz
UA834WB
902–960 MHz
UA834XA
1240–1260 MHz
UA834Z16
1492–1525 MHz
UA834Z17
1785–1805 MHz
UA834Z18
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
Shure Incorporated
UA834
In-Line Antenna Amplifier
3/4
2016/10/25
