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MODEL UA840 ANTENNA DISTRIBUTION SYSTEM
The Shure Model UA840 is an amplified, UHF Antenna
Distribution System designed to expand a wireless micro-
phone system by splitting one pair of antennas to multiple
receivers. It also amplifies RF signals to compensate for in-
sertion loss due to splitting signal power to mulitple output
ports. Each UA840 allows up to four receivers to use the
same antennas. A CASCADE port allows con
nections to a fifth receiver or a second UA840.
Each system contains the following items:
UA840 Antenna Distribution System
Rack-mounting hardware
Surface-mounting hardware
Antennas and front-mounting hardware
18-in. Power OUTPUT Cord
Power Cord
The Shure Model UA840 has been developed to en-
sure maximum sensitivity and signal 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 Active Remote
Antenna Kit 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 UA840 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 con-
nection for up to five (5) more UA840’s, for a total of up
to 20 UHF wireless receivers.
•
Compatibility. The UA840 is compatible with all wire-
less microphone receivers operating within a compat-
ible frequency range (see
UHF Carrier Frequency
Ranges in the Specifications section).
•
CASCADE Ports. Two 50
Ω
, BNC-type antenna CAS-
CADE ports allow additonal UA840 unit or a fifth wire-
less receiver. A large wireless system can be run off of a
single pair of antennas.
•
Power OUTPUT Port. Up to five (5) receivers can be
daisy-chained via the Power OUTPUT ports to a single
power source.
•
Low Noise and Intermodulation Distortion. The
UA840 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 UA840 amplifies signals to compensate,
ensuring a strong signal to the receivers.
•
Front-Mounted Antennas. The UA840 comes with
hardware to front-mount the antennas, if desired.
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