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.
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.
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.
|Set the gain switch to +6 dB for shorter cable runs, and +12 dB for longer runs.|
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.
Connect between the antenna and receiver (or antenna distribution system), as shown. The DC POWER LED illuminates green when the receiver is powered on.
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
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
To maintain top performance for 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.
Use the following guidelines when mounting antennas:
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.
For more information, visit http://www.shure.com
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. Additional gain just amplifies everything in the RF range—including interference and ambient RF noise. It cannot selectively increase the signal from the transmitter.
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 require +6dB of gain for a sum total of 0 dB loss.
10 to 15 V DC bias from coaxial connection, 0.60–0.72 W
±2 dB, Switchable
+6 dB +12 dB
Cast Aluminum, black painted finish
67 x 32 x 112 mm (H x W x D) Dimensions with Stand: 108 x 32 x 112 mm
|Without Mounting Stand||0.28 kg (9.8 oz.)|
|With Mounting Stand||0.42 kg (14.8 oz.)|
This product meets the Essential Requirements of all relevant European directives and is eligible for CE marking.
The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance
Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
75031 Eppingen, Germany
Phone: 49-7262-92 49 0
Fax: 49-7262-92 49 11 4