3ENGLISH
MODEL UA845 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 UR4 wireless receivers. It
also amplifies RF signals to compensate for insertion loss due to
splitting signal power to mulitple output connectors. Each UA845 al-
lows 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
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
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
frequencies
•
Locate multiple transmitters more than 3 m [10 ft] from
receiving 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
, 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
antennas.
• Power OUTPUT and OUT Connectors.
Up to five (5) UR4
receivers can be daisy-chained and powered from a single
source via the Power OUTPUT 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.
CONTROLS AND CONNECTORS
Front Panel
Back Panel
AC Power INPUT Connector.
AC Power OUTPUT Connector. Each UA845 has a
Power OUTPUT connector for daisy-chaining up to five
(5) Shure Model UR4 UHF Diversity Single or Dual
Receivers to a single power source.
NOTE: This connector does not work for Shure ULX4
Receivers.
ANTENNA IN Ports, Channel A & B. BNC-type connec-
tors for antennas.
RF CASCADE Connectors (Output connector 5),
Channel A & B. BNC-type connectors for adding a fifth
receiver, or additional UA845's, permitting more wireless
receivers to be connected.
RF OUTPUT Connectors, Channel A & B. BNC-type
connectors for up to four wireless receivers.
UA845
UHF ANTENNA DISTRIBUTION SYSTEM
POWER INDICATOR
POWER ON/OFF
SWITCH
(16 pages)
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