System Description; System Features; System Components - Shure U Series User Manual

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SYSTEM DESCRIPTION

The Shure UHF Wireless microphone system is a frequency-agile diversity sys-
tem operating in the UHF band. Both the receiver and the transmitter are synthesizer
controlled via Phase Locked Loop (PLL) circuitry for clear, steady radio frequency
(RF) signal. The receiver is available in either dual or single models that fit into a stan-
dard 19 inch (482 mm) equipment rack. An auxiliary unswitched AC output jack al-
lows multiple receivers to be linked "daisy chain" style. The optional UA830 Remote
Antenna Kits can be powered by 12 Vdc, 500 mA output provided through the anten-
na connectors. The optional UA840 Antenna Distribution Amplifier Kits allows con-
nection of multiple receivers using only two antennas.

SYSTEM FEATURES

Shure UHF Wireless Systems offer many exceptional features, including:
Frequency Agility. The operating frequency of transmitters and receivers can be
easily switched to any setting in the UHF range. Settings are available in pre-pro-
grammed incremental steps that allow for necessary channel separation.
Menu Driven Display. User–programmable receiver display shows Group,
Channel, Frequency, Name, Squelch level, and Locked/Unlocked status.
Exclusive Shure MARCAD Circuitry. MARCAD (MAximum Ratio Combining
Audio Diversity) circuitry constantly monitors signals from both receiver sections
and combines them in a single output signal. MARCAD provides superior recep-
tion and exceptional freedom from dropouts.
Noise Squelch Circuitry. Analyzes signal quality instead of signal strength . This
virtually eliminates the possibility of annoying noise bursts coming through your
receiver.
Dual RF Level Meters. The U4S and U4D receivers have two RF meters, one for
each antenna. The dual meters indicate received signal strength at each antenna,
and make it easier to identify and troubleshoot "dead spots."
Audio Metering. Each receiver includes a seven–segment audio meter that lets
you monitor audio level and helps optimize transmitter gain setting.
Transmitter Display. Shows Group, Channel, Battery Power Level, and POWER
LOCK ON/OFF* condition. Both displays are user programmable.
Transmitter Battery Power Meters: Meters on the transmitter and the RECEIV-
ER MONITOR TRANSMITTER BATTERY POWER LEVEL from the receiver as
well as from the transmitter.
Tone Key Squelch: Eliminates unwanted noise from entering system; eliminates
popping noises when turning the transmitter on or off.
Dual Receiver Option: Provides greater flexibility while conserving rack space.
Preconfigured Group/Channel: Ensures frequency compatibility and simplifies
system installation.
Network Expansion Capability. U4S and U4D receivers have a 25–pin serial con-
nector for future computer control and monitoring via an accessory interface box.
DC/DC Converter: Ensures consistent audio and RF performance, even if bat-
tery voltages change.
* U.S. Patent No. 5,692,057.
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U1
FIGURE 1
SYSTEM COMPONENTS (FIGURE 1)
Each Shure UHF Wireless System includes the following components:
U1 Body-Pack Transmitter with your choice of instrument cable or micro-
phone,
or
U2 Hand-Held Microphone-Transmitter with your choice of interchangeable
microphone heads:
SM58 cardioid dynamic microphone
BETA 58A supercardioid premium dynamic microphone
SM87 supercardioid condenser microphone
BETA 87 supercardioid premium condenser microphone;
and a
U4S Single Channel Diversity Receiver with rack-mounting hardware and
antennas,
or a
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U2
U4S
U4D
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