MODEL UA845 ANTENNA DISTRIBUTION SYSTEM

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UA845

UHF Antenna Distribution System

The Shure Model UA845 is an amplified, UHF Antenna Distribu- tion System that expands a wireless microphone system by splitting one pair of antennas to multiple Shure U4 or Shure UC4 wireless receivers. It also amplifies RF signals to compensate for insertion loss due to splitting signal power to mulitple output connectors. Each UA845 allows up to four receivers to use the same antennas. CASCADE connectors allows connections to a fifth receiver or a second UA845. There are also power connectors for powering Shure UHF and UC Wireless systems.

Each system contains the following items:

UA845 Antenna Distribution System

Rack-mounting hardware

Surface-mounting hardware

Front-mounting antenna hardware

18-in. Power OUTPUT Cord

Power Cord

Antenna cables for receiver connections

DC power cables for receiver connections to DC power con- nectors on UC receivers.

The Shure Model UA845 ensures maximum sensitivity and sig- nal processing capability, providing the widest radio range possible for the largest number of wireless receivers. To get the most from this system, follow these guidelines:

When using long runs of cable for remote-mounted antennas, use the UA830 In-Line RF Amplifier and the Shure Model UA825 or UA850 Remote Antenna Extension cables (RG-8/X or equivalent), which have low loss at UHF operating frequen- cies

Locate multiple transmitters more than 3 m [10 ft] from receiv- ing antennas

SYSTEM FEATURES

Expandability. The UA845 UHF Antenna Distribution System is designed for large UHF wireless systems. Each unit allows up to four wireless receivers to use the same two antennas, and the CASCADE ports allow connection to a fifth receiver or a second UA845.

Compatibility. The UA845 is compatible with all Shure wire- less microphone receivers operating within a compatible fre- quency range (see UHF Carrier Frequency Ranges in the Specifications section).

CASCADE Ports. Two 50 Ω, BNC-type antenna CASCADE ports allow an additonal UA845 unit or a fifth wireless receiver. A large wireless system can be run off of a single pair of anten- nas.

Power OUTPUT and OUT Connectors. Up to five (5) U4 re- ceivers can be daisy-chained and powered from a single source via the Power OUTPUT connectors. Up to four (4) UC4 receivers can be powered from the UA845 using the 12 Vdc OUT connectors.

Low Noise and Intermodulation Distortion. The UA845 maintains clean signals with minimal distortion.

Insertion Loss Compensation. Whenever a signal is split to multiple output ports, there is a loss in signal strength. The UA845 amplifies signals to compensate, ensuring a strong sig- nal to the receivers.

Front-Mounted Antennas. The UA845 comes with hardware to front-mount the antennas, if desired.+

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Shure manual Model UA845 Antenna Distribution System, System Features

UA845 specifications

The Shure UA845 is a sophisticated antenna distribution system designed for professional audio applications, particularly in live sound and broadcast environments. Its primary purpose is to enhance the performance and reliability of wireless microphone and intercom systems by effectively managing multiple antennas and improving signal quality.

One of the standout features of the UA845 is its ability to support both active and passive antennas. This versatility allows users to customize their setup according to the specific needs of their venue or event. The UA845 offers four outputs that can connect to different receivers, enabling multiple wireless systems to operate simultaneously without interference. Each output is individually buffered, ensuring that the signal remains strong and clear, even when distributing to several devices.

The UA845 employs advanced RF filtering technology to minimize noise and interference from other electronic devices. This feature is especially beneficial in crowded environments where wireless frequencies may be congested. The built-in signal amplification further enhances performance, allowing for longer cable runs without degradation of audio quality. With a robust construction, the unit is reliable and durable, making it suitable for the rigors of touring and live performance.

Additionally, the UA845 includes a built-in power supply that can feed power to the connected antennas, simplifying the setup and reducing the need for additional power sources. This power distribution functionality also helps to maintain a clean, organized stage setup.

For those in need of monitoring and control, the UA845 comes equipped with LED indicators that provide visual feedback on power status, signal strength, and RF activity. This feature allows users to troubleshoot potential issues quickly and ensures optimal performance during critical moments.

The UA845 is also compatible with the Shure Axient Digital and QLX-D systems, making it a flexible option for professionals who rely on high-quality audio solutions. Its seamless integration with these systems highlights its importance in comprehensive audio setups, ensuring that engineers and performers alike can rely on exceptional sound reproduction.

In summary, the Shure UA845 is an essential tool for audio professionals, boasting features like active and passive antenna support, signal amplification, RF filtering, and an integrated power supply. Its design prioritizes both performance and ease of use, making it a valuable addition to any wireless audio system.