Shure UA845 User Guide
Model UA845 User Guide
ANTENNA DISTRIBUTION SYSTEM
USER'S GUIDE
©2006, Shure Incorporated
27AS8862 (Rev.1)
Printed in U.S.A.
POWERING ON/POWERING OFF THE UA845
Last powered on First powered off
To avoid damaging internal components, the UA845 amplifier
should be the last component in your system to be powered on.
To avoid damaging internal components, the UA845 amplifier
should be the first component in your system to be powered off.
CONNECTING ANTENNA CABLES
Accidentally connecting the center cable pin (power supply) to the cable housing (ground) may cause internal component damage. Use
caution when installing cables.
SAFETY INFORMATION
! IMPORTANT SAFETY INSTRUCTIONS !
1. READ these instructions.
2. KEEP these instructions.
3. HEED all warnings.
4. FOLLOW all instructions.
5. DO NOT use this apparatus near water.
6. CLEAN ONLY with dry cloth.
7. DO NOT block any ventilation openings. Install in accordance with the manufacturer's instructions.
8. DO NOT install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including amplifiers) that produce heat.
9. DO NOT defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wider blade or the third
prong are provided for your safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.
10. PROTECT the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
11. ONLY USE attachments/accessories specified by the manufacturer.
12.
13. UNPLUG this apparatus during lightning storms or when unused for long periods of
time.
14. REFER all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does not operate normally, or has been
dropped.
15. DO NOT expose the apparatus to dripping and splashing. DO NOT put objects filled
with liquids, such as vases, on the apparatus.
USE only with a cart, stand, tripod, bracket, or table
specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid
injury from tip-over.
This symbol indicates that dangerous voltage constituting a
risk of electric shock is present within this unit.
This symbol indicates that there are important operating and
maintenance instructions in the literature accompanying this unit.
TABLE OF CONTENTS
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SYSTEM FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CONTROLS AND CONNECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SYSTEM INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CONNECTING RECEIVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LICENSING AND WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3
MODEL UA845 ANTENNA DISTRIBUTION SYSTEM
UA845
UHF Antenna Distribution System
power
The Shure Model UA845 is an amplified, UHF Antenna Distribution 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 connectors on UC receivers.
SYSTEM FEATURES
•
Expandability.
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.
less microphone receivers operating within a compatible frequency range (see UHF Carrier Frequency Ranges in the
Specifications section).
• CASCADE Ports.
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.
The UA845 UHF Antenna Distribution System
The UA845 is compatible with all Shure wire-
Two 50 Ω, BNC-type antenna CASCADE
The Shure Model UA845 ensures 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 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
• Power OUTPUT and OUT Connectors.
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.
maintains clean signals with minimal distortion.
•
Insertion Loss Compensation.
multiple output ports, there is a loss in signal strength. The
UA845 amplifies signals to compensate, ensuring a strong signal to the receivers.
•
Front-Mounted Antennas.
to front-mount the antennas, if desired.
Whenever a signal is split to
The UA845 comes with hardware
Up to five (5) U4 re-
The UA845
4ENGLISH
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