Nady U-41 User Guide

SERVICE INFORMATION

(U.S.) If you are experiencing operation problems with your system, check out the support
page on the Nady website: www.nady.com for help and for contacting the Nady Service
Department. Should your wireless system require service, you must contact the Nady Service
Department at [phone] for a Return Authorization (R/A) Number and a service quote
(if out of warranty) before sending the unit in. Make sure the R/A Number is clearly marked
on the outside of the package. Ship the unit prepaid with cashier’s check or money order
enclosed (if not prepaid with credit card) to: Nady System Inc., Service Department, 6701
Shellmound Street, Emeryville, CA 94608. Include a brief description of the problem you are
experiencing. For service of a unit under warranty follow the instruction of your Warranty
Card regarding Warranty Service.

(International) For service, please contact the NADY distributors in your country through the
dealer from whom you purchased this product.

DO NOT ATTEMPT TO SERVICE THIS UNIT YOURSELF, AS THAT WILL VOID YOUR
WARRANTY.

U-41 QUAD

Four Discrete Channel UHF

Wireless Microphone System

NADY SYSTEMS, INC.

6701 Shellmound Street • Emeryville, CA 94608

Tel: [phone] • Fax: [phone] • www.nady.com

OWNE R’S MA NUAL

TABLE OF CONTEN TS

SPECIFICATIONS

COVER FRONT ............................................................................................................. 1

TABLE OF CONTENTS .................................................................................................. 2

INTRODUCTION ............................................................................................................ 2

USING THIS MANUAL ................................................................................................... 2

SYSTEM FEATURES ..................................................................................................... 3

U-41 QUAD RECEIVER OPERATION INSTRUCTIONS ............................................... 4

UH-4 HANDHELD TRANSMITTER ................................................................................ 7

UB-4 BODYPACK TRANSMITTER ................................................................................ 8

LINK-4 SNAP-ON TRANSMITTER ...............................................................................11

CAUTIONS AND TROUBLESHOOTING ..................................................................... 13

TIPS.............................................................................................................................. 14

SPECIFICATIONS ........................................................................................................ 15

FREQUENCY PLAN ..................................................................................................... 15

SERVICE INFORMATION .........................................................................BACK COVER

INTRODUC TION

Thank you for choosing the Nady U-41 QUAD wireless system, and congratulations on your choice.
The Nady U-41 QUAD Wireless systems are by far the best performance and price value in profes­sional UHF wireless. It offers clear channel operation on the wide-open, uncluttered UHF band
for interference-free performance in any application or locale. The U-41 QUAD delivers 4 discrete
channels in frequency from 796.30 MHz to 803.30 MHz. The U-41 QUAD Wireless system feature
Nady’s proprietary companding and low noise circuit for an industry best 120dB dynamic range, and
the clearest, most natural sound available in wireless today.

USING THIS M ANUAL

This booklet gives instructions for the operation of the U-41 QUAD Wireless systems: The U-41
QUAD receiver, transmitter models UH-4 Handheld Microphone, UB-4 bodypack Lavalier Micro­phone, and Link-4 Snap-On microphone transmitters.

This manual will first explain the benefits of the U-41 QUAD Wireless System and then will take you
step by step on how to operate your new system. Each section will give you detailed information.
Also, included in this manual are the frequency chart, microphone-wiring guide, system specifica­tions and servicing information.

OVERALL SYSTEM SPECIFICATIONS

Frequency Response .............................................................................................30Hz-18kHz, -3dB

Dynamic Range .........................................................................................................................120dB

Harmonic Distortion ............................................................................................. <0.5% THD, normal

RF Carrier Frequencies ......................Factory installed channels between 796.30MHz - 803.30MHz

Frequency stability ................................................................................ +/-0.005% crystal controlled

Modulation .........................................................................FM +/-20kHz normal, +/-50kHz maximum

Tone SquelchTM Frequency ..............................................................................................32.768kHz

Operating Range ..............................................................250 feet typical, 500+feet max line of sight

RECEIVER SPECIFICATIONS

Controls .....................................................................Power ON/OFF buttons, Volume/Mute controls

Audio Output Level ....................................................Unbalanced Sum output: 360mV variable level

Balanced output: +/-24mV fixed level

Connectors ............................................................. Balanced: XLR. Unbalanced: 1⁄4” TS. Antennas:

BNC connectors. DC in: 2.1mm barrel type.

Indicators .......................................................... Power On, TX ON LED and AF 5-segment bargraph

Mute Threshold ..................................................................................-65dBm to -95dBm (adjustable)

Image Rejection .........................................................................................................70dB, minimum

Power Requirement ...................................................................................................... 16.5VDC/0.4A

Antennas ................................................................................Dual, 4.25” (10.8 cm) each, adjustable

Dimensions .................. 17.0” x 6.25” x 1.75 [W / D / H] (43.18 cm x 15.88 cm x 4.45 cm) [W / D / H]

Weight .....................................................................................................................4.10 lbs (1.86 Kg)

TRANSMITTER SPECIFICATIONS

Models Available .............................UH-4 handheld, LINK-4 SNAP-ON transmitters, UB-4 bodypack

RF Output Power ................. +14dBm (25mW normal), +17dBm (50mW maximum allowed by FCC)

Harmonic/spurious .......................................................................................................-50dBc normal

Antenna Type ........................................................UH-4: integral. LINK-4: integral into attached mic

UB-4: External permanent attached

Controls ................................................. Transmitter ON/Mute/OFF switch, Audio Input level control,

Phantom Power On/Off (LINK-4)

Audio Input Levels ................................................................................. UH-4: 24mV. LINK-4: 24mV.

UB-4: 225mV (Instr.), 310mV (HM), 75mV (Lav.)

Impedance ..............................................................................UH-4: 3.3k Ohms. LINK-4: 360 Ohms.

UB-4: 500k Ohms (Instr.), 2k Ohms (HM/Lav.)

Connector ..........................................UB-4: 3.5mm locking jack. LINK-4: XLR with phantom power

Indicator ................................................................................................ Power and Low Battery LEDs

Battery Type/ Life ................................................................................9V alkaline, 8-10 Hours normal

Dimensions .............................................................. UH-4: 9.5” x 2.0” [L / Dia.] (24.13 cm x 5.08 cm)

LINK-4: 1.5” x 4.5” x 1.5” [W / D / H] (3.81 cm x 11.43 cm x 3.81 cm)
UB-4: 2.5” x 4.25” x 1.0 [W / D / H] (6.35 cm x 10.80 cm x 2.45 cm)

Weight (w/o batteries) .....................UH-4: 6.6 oz (187 g), UB-4: 3.1 oz (88 g), LINK 4: 2.6 oz (80 g)

Specifications and design subject to change for improvement purposes without prior notice.

FREQUENCY PLAN

Four UHF frequencies

Channel 1 U7: 796.30 MHz
Channel 2 U1: 800.20 MHz
Channel 3 U6 : 797.50 MHz
Channel 4 U3 : 803.30 MHz

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TIPS

• The receiver antennas should be kept away from any metal surface.

• For optimum operation with external antennas use only low loss RF shielded cable no longer than
10’ (3m) in length.

• If the Volume Control of the receiver is set too high, it may over-drive the input of the mixer or PA,
causing distortion. Conversely, if the output is set too low, the overall signal-to-noise ratio of the
system may be reduced. Adjust the output level of the receiver such that highest sound pressure
level going into the microphone causes no input overload in the mixer or PA, and yet permits the
mixer level control to operate in the normal range (not too high and not too low). This provides the
optimum signal to noise for the entire system.

• Before inserting the batteries, please make sure that they are inserted according to the correct
polarity.

• Use only brand new alkaline batteries. Do not use “general purpose” carbon zinc batteries. When
the batteries are weak, replace all the batteries together at the same time.

• Position the receiver such that it has the least possible obstructions between it and the transmit­ter. Line of sight is best!

• The transmitter and the receiver should be as close as possible for optimum performance, but
never less than 3’ (1 meter) as that can overload the RF input circuitry of the receiver and cause
reception problems for the other channels.

• For the best operation, the receiver should be placed at least 1 meter above the ground and 1
meter away from a wall or metal surfaces. The transmitter should be also at least 1 meter from the
receiver. Keep the receiver antennas away from noise source such as motors, automobiles, neon
light, signal processor, computer, as well as large metal objects.

• A receiver cannot receive signal from two or more transmitters simultaneously. The U-41 QUAD
has 4 receivers so can be operated with 4 transmitters if they’re on the same corresponding
frequencies.

• Turn the transmitter off when it is not in use. As batteries can leak over time, remove the them if
the transmitter is not to be used for a long period.

Note: Scratchy noises can sometime occur when some electric guitars with dirty pots or connec­tions are used with any wireless system. Therefore, the capacitor internal to the 1⁄4” plug in the sup­plied GT (instrument) cable provides first order filtering of the RF signal from the cord into the guitar
and eliminates virtually all scratchy noises. Should your equipment still give you scratchy noises,
we suggest these steps to eliminate them:

a. Make sure all guitar volume and tone pots are clean and all contacts are solid--this is very

important.

b. A 47pF capacitor soldered across the pot to ground terminal of the guitar’s volume and tone

pots will provide extra filtering as necessary.

SYSTEM FEATURES

U-41 QUAD Receiver

• Four discrete UHF wireless receivers in a single rugged 19” 1U, all-metal rack mount housing

• Back panel Balanced XLR mic level outputs, Unbalanced 1⁄4” jack line level sum output with sepa­rate volumes, and external adjustable mute control for each channel

• Front panel LED display indicating TX on (single LED) and AF levels (5-segment bar graph) for
each channel, and dual removable antennas

• Nady’s exclusive patented companding circuitry and highest quality audio for an unsurpassed
UHF performance with 120dB dynamic range

• Operates on the UHF frequency band from 796.30 MHz to 803.30 MHz

• Tone Squelch circuitry for protection from RF interference

• Externally powered with DC adapter included (16.5VDC/0.4A)

UH-4 Handheld Microphone Transmitter

• Nady DM-10D neodymium cartridge delivers transparent vocals, maximum feedback rejection and
minimal handling noise

• OFF/MUTE/ON switch for ease of use

• Unique screw-on battery compartment for quick pop-in battery replacement — uses standard 9V
alkaline battery

• POWER and LOW BAT LED indicators

• Input level control for optimum sound adjustment

• Rugged ABS housing with integral antenna

UB-4 Bodypack Transmitter

• Compact bodypack with locking jack for lavalier microphone

• OFF/MUTE/ON switch for ease of use

• Unique sliding battery compartment for quick pop-in battery replacement — uses standard 9V
alkaline battery

• POWER and LOW BAT LED indicators

• Input level control for optimum sound adjustment, LT (lavalier mic) and HM (headmic) modes

• Rugged ABS housing with external antenna

LINK 4™ SNAP-ON Transmitter

• Compact microphone transmitter that converts any dynamic/condenser XLR hardwired micro­phone (handheld, lavalier or headworn) to wireless operation

• OFF/MUTE/ON switch for ease of use

• Unique sliding battery compartment for quick pop-in battery replacement- uses standard 9V alka­line battery

• Single LED indicator flashes once for unit on; lights steady for low battery alert

• Audio HI/LO gain selection for optimum sound

• 9V DC phantom powering on/off for lavalier or handheld condenser microphone

• Standard locking 3-pin connector with adjustable threaded ring to provide secure connection to
any XLR handheld or lavalier microphone connector

• Lightweight ABS housing with integral antenna

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