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UA874 Active Directional Antenna for improved wireless signal reception with
greater rejection of unwanted signals
1/2 Wave Antenna Remote Mount Kit
Antenna Rack Panel with Cables and BNC Adapters
Note: Be sure to select antennas and accessories that are compatible with the operating frequency range of your wireless system. Contact Shure or your local
retailer for help with selecting the right wireless accessories.
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.
Enable or Disable DC Bias Voltage
The DC bias voltage can be disabled on UA845UWB units built after August 10, 2018.
Note: The build date is printed on the bottom of the unit.
To disable the DC bias voltage:
1.
Hold the SET button down and turn the unit on.
2.
Release the SET button when all LEDs on the front panel turn on.
3.
Power cycle the unit.
4.
DC bias voltage is disabled when all green LEDs flash briefly and the one matching the selected frequency range re-
mains on.
Shure Incorporated
UA874
UA505
UA440
9/12
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