E1998, Shure Brothers Incorporated
Printed in U.S.A.
Page 1 of 4
fod 05035
UHF WIRELESS SYSTEM
The Shure UHF Wireless microphone system is a frequency–
agile diversity system operating in the UHF band between 782 and
810 MHz (782 to 806 MHz in the U.S.A.). Up to 20 UHF Wireless
systems can be operated simultaneously in a single installation.
FEATURES
•
Frequency Agility. All Shure UHF transmitters and receivers can
be programmed for any frequency within the 782 to 810 MHz band,
on 125 kHz centers, for a maximum of 224 frequencies (191 in the
U.S.A.)
•
Menu Driven Receiver Display. User–programmable receiver
display shows GROUP, CHANNEL, FREQUENCY, NAME,
SQUELCH LEVEL, and receiver function LOCKED/UN-
LOCKED status.
•
Exclusive Shure MARCAD
Circuitry. MARCAD (MAximum
Ratio Combining Audio Diversity) circuitry constantly monitors
signals from both receiver sections and combines them into a
single output signal that is virtually free of noise and dropouts.
•
Dual RF Level Meters. Monitor RF signal strength at each anten-
na, and make it easier to identify “dead spots” as well as other RF
sources.
•
Audio Level Meters. Each receiver channel includes a seven–seg-
ment audio meter that lets you monitor audio level and helps opti-
mize transmitter gain setting.
•
Transmitter Battery Power Meters. Monitor transmitter battery
power level from the transmitter and receiver.
•
Tone Key Squelch. Provides audio output only when tone key signal
is present in transmitted signal. This eliminates noise associated with
loss of carrier.
•
Group/Channel Configuration. Ensures frequency compatibili-
ty and simplifies system installation. Can also be configured by
frequency.
•
Network Expansion Capability. A 25–pin serial connector on the
receivers allows future computer control and monitoring.
•
Transmitter DC to DC Converter. As battery voltage declines,
system voltage remains constant for worry–free operation.
•
Switching 90/230 VAC Internal Power Supply in Receivers.
Eliminates the need for a separate external power supply.
•
Independent Headphone Monitor. Lets user adjust monitor vol-
ume without changing receiver output levels.
•
Transmitter Power On/Frequency Change inhibit Function.
Prevent accidental power interruptions, and changes to trans-
mitter frequency settings.
•
Optional U1H High Powered Transmitter . 100 mW or 50 mW
versions of the U1 transmitter are available.
•
Optional UA830A Active Remote Antenna Kit (Figure 7). Allows
remote placement of receiver antennas. Amplifies signal by 3 to 10
dB (user adjustable) to offset cable loss.
•
Optional UA840A Antenna Distribution System (Figure 4).
Provides connection to up to five receivers, using only two an-
tennas.
SYSTEM COMPONENTS
U1 Body-Pack Transmitter (Figure 1A) with detachable lavalier
microphone, headset, or instrument cable,
or
U2 Hand-Held Microphone-Transmitter (Figure 1B) with in-
terchangeable microphone heads,
and a
U4S Single Channel MARCAD Diversity Receiver (Figure 2)
with switching power supply (90/230 VAC), AC power cord, front
mount antenna hardware, antennas, and rack-mounting hardware,
or a
U4D Dual Channel MARCAD Diversity Receiver (Figure 3)
with switching power supply (90/230 VAC), AC power cord, front
mounting antenna hardware, antennas, and rack-mounting hard-
ware.
ARCHITECTS’ & ENGINEERS’ SPECIFICATIONS
The wireless microphone system shall be a frequency–agile, sig-
nal combining diversity system which operates in the UHF band be-
tween 782.125 MHz and 809.875 MHz (up to 805.875 MHz in the
U.S.A.). Hand–held transmitters shall include an integral dynamic
or condenser microphone. Body–pack systems shall include either
a lavalier microphone, a headset microphone, or an instrument
cable, depending on the application.
All transmitters shall be digitally synthesized (phase locked loop)
and operate on two (2) AA batteries and shall have a power on/off
switch, an adjustable audio gain control, a digital microprocessor con-
trolled LCD display and 5 segment digital battery fuel gauge. They
shall also feature both power on/off ”lock” as well as frequency–
change inhibit options, set via push–buttons within the battery
compartment.
All receivers shall be digitally synthesized and shall be compatible
with the standard 19” full rack space format. They shall utilize a digital
microprocessor to adjust such parameters as NAME, GROUP/
CHANNEL, FREQUENCY, SQUELCH, and LOCK. All receivers
shall utilize audio combining diversity circuitry which achieves the
best possible signal–to–noise ratio. There shall be two type of re-
ceivers available: single channel diversity receivers and dual chan-
nel diversity receivers. The receivers shall have front panel LEDs
that indicate RF signal strength, audio level, and diversity operation.
A microprocessor–controlled front panel LCD window display and
controls, as well as headphone monitor and volume controls shall
also be provided. Front panel BNC connectors on the receiver shall
be provided for front–mounting antennas, and a 25–pin serial con-
nector shall be provided on the rear panel to allow future computer
control.
The Shure UHF Wireless microphone system is specified.
Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
Specification Sheet
SHURE UHF WIRELESS SYSTEM
Phone: 800-257-4873 Fax: 847-866-2279
In Europe, Phone: 49-7131-72140 Fax: 49-7131-721414
Internationally, Phone: 847-866-2200 Fax: 847-866-2585
Web Address: http://www.shure.com
(24 pages)
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