4 ENGLISH
SYSTEM INSTALLATION
Installing Front-Mounted Antennas
The UA845 comes equipped for front-mounted antennas.
Front-mounting improves RF performance of the system by moving
the antennas to the front of the rack. When a unit is located in a
rack, antennas should be either front- or remote-mounted.
1. Insert the bulkhead adapters through the holes in each bracket,
and secure them from each side, using the supplied hardware.
2. Connect the supplied antenna cables to the receiver antenna
inputs and adapters.
3. Install the antennas onto the bulkhead adapters protruding
through the front panel.
NOTE: For the best results, point the antennas up and away
from each other at 45 angles from vertical. This ensures the
best possible reception and greatly reduces the possibility of
signal dropout. Always perform a walk-through test of the
system in the performing area before using a wireless system.
Installing Remote Antennas
Remote-mounted antennas have the advantage of being free
from the unit and closer to the transmitters. They can be placed any-
where within the recommended cable length, creating a much wider
radio reception range and further reducing the possibility of signal
dropout. When remote-mounted antennas are desirable, please
ask your Shure dealer for information on the UA830 In-Line RF Am-
plifier. Cables are available in UA825 (7.5 m [25 ft]) and UA850 (15
m [50 ft]) versions.
CONNECTING RECEIVERS
Single UA845 Setup
1.
Using low-loss, 50
coaxial cables (RG-58 or equivalent), con-
nect the right and left (Channels 1 through 4, A and B) RF
OUTPUT ports on the UA845 to the corresponding left and
right antenna inputs on each receiver. Use the CASCADE ports
to connect a fifth receiver.
2. Using the supplied power cable, connect the UA845 to a power
outlet.
3. To daisy-chain UR4 Receivers together with Power OUTPUT
cables, connect the Power OUTPUT connector of the UA845 to
the Power INPUT connector of one receiver. Connect the
remaining receivers similarly. Connect the POWER INPUT of
the unit to a power supply.
NOTE: No more than five (5) Shure UHF-R receivers should be
powered through a daisy-chain from a single UA845.
Multiple UA845 Setup
1. Connect the CASCADE ports (connector 5) for RF OUTPUT
Channels A and B of one UA845 to the ANTENNA INPUT,
channels A and B, of a UR4 receiver, or a second UA845.
2. If desired, connect additional units in the same manner.
3. To daisy-chain UR4 Receivers together with Power OUTPUT
cables, connect the Power OUTPUT connector of the UA845 to
the Power INPUT connector of one receiver. Connect the
remaining receivers similarly. Connect the POWER INPUT of
the unit to an AC power supply.
WARNING: When adding additional UA845's to a sys-
tem, each UA845 should be connected to a separate
power supply. No more than five (5) receivers can be
powered from a single UA845.
Daisy-chaining multiple UA845's through the Power OUT-
PUT ports will overload a single power supply, possibly
causing damage to the equipment.
UA845
UHF Antenna Distribution System
power
UA845
UHF Antenna Distribution System
UA845
UHF Antenna Distribution System
power
power
