Nady UHF-4, UHF-24 operating instructions

SERVICE INFORMATION

(U.S.) If you are experiencing operation problem 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). Make sure the R/A Number is clearly marked on the outside of the pack­age. Cashier’s check or money is enclosed (If not prepaid with credit card), and ship the unit
prepaid 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 purchase this product.

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

WARRANTY.

UHF-24

Dual Channel Receiver

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 C ONTENTS

SPECIFICATIONS

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

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

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

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

UHF-24 RECEIVER OPERATIONINSTRUCTION ........................................................ 4

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

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

LINK-4 PLUG-IN TRANSMITTER ................................................................................11

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

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

SPECFICATIONS ........................................................................................................ 15

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

SERVICE INFORMATION ............................................................................. Back Cover

INTRODUCTION

Thank you for choosing the Nady UHF-24 wireless system, and congratulations on your choice. The
Nady UHF-24 wireless system is 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 UHF-24 delivers 2 discrete channels in the frequency
range from 794.90MHz to 804.88MHz. The UHF-24 wireless system features 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. Please read the instructions for your system completely
before operating the unit.

USING T HIS MANUAL

This booklet gives instructions for the operation of the UHF-24 Wireless systems: The UHF-24
receiver; and transmitter models UH-4 Handheld Microphone, UB-4 bodypack Lavalier Microphone,
and Link4 Snap-On microphone transmitters.

This manual will first explain the benefits of the UHF-24 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 .............................................................................................20Hz-20kHz, -3dB

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

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

RF Carrier Frequencies .......................................................Factory installed dual channels between

794.90MHz-804.88MHz (2 groups)

Frequency stability ...............................................................................+/-0.005% Crystal Controlled

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

TSQ Frequency ..................................................................................................................32.768kHz

Operating Range .............................................................250 feet normal, 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 DC in: 2.1mm barrel type

Indicators ............................................................................. Power On, TX and AF LED Bars + Peak

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

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

Power Requirement ......................................................................................................... 15VDC/0.4A

Antennas ............................................................................. 4.0” (10.2 cm) Dual telescopic antennas

Dimensions ........................ 8.2” x 5.5” x 1.75 [W / D / H] (20.83 cm x 14.0 cm x 4.45 cm) [W / D / H]

Weight ...................................................................................................................1.17 lbs (0.530 Kg)

TRANSMITTER SPECIFICATIONS

Models Available .....................UH-4 Handheld, UB-4 Bodypack, and LINK 4 SNAP-ON transmitters

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

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

Antenna Type .....................................................UH-4: Integral. UB-4: External permanent attached

LINK 4: Integral into hardwire Mic

Controls ................................... Transmitter ON/Mute/OFF switch, Audio Input level control (LT/HM),

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: 3.3kΩ. LINK 4: 360Ω, UB-4: 500kΩ (Instr.), 2kΩ (HM/Lav.)

Connector .................................... UB-4: 3.5mm locking jack, LINK 4: XLR with 9V Phantom power

Indicator .................................................................................................................. Low Battery LEDs

Battery Type ................................................................................ 9V alkaline or rechargeable battery

Battery Life ............................................................................................................8-10 Hours normal

Dimensions .............................................................. UH-4: 9.5” x 2.0” [L / Dia.] (24.13 cm x 5.08 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)
LINK-4: 1.5” x 4.5” x 1.5” [W / D / H] (3.81 cm x 11.43 cm x 3.81 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

GROUP 1

Channel 2: 802.30 MHz
Channel 5: 794.90MHz

2

GROUP 2

Channel 3: 803.30 MHz
Channel 6 797.50 MHz

15

TIPS

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

• If the Volume Control of the receiver is set too high, it may over-drive the input of the mixer, 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, 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” batteries. When batteries are
weak, replace the batteries altogether 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 but not less than 1 meter.

• 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 antenna 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 UHF-24 has 2
receivers so can be operated with 2 transmitters only on the same frequencies.

• Turn the transmitter off when it is not in use. Remove the batteries if it is not to be used for a long
period.

Note: Scratchy noises can sometime occurs when some electric guitars with dirty pots or connec­tions are used with any wireless system. Therefore, the supplied capacitor 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.

SYSTEM FEATURES

UHF-24 Receiver

• Two discrete UHF wireless receivers in one housing, for simultaneous operation of two transmit­ters

• Back panel Balanced XLR mic level outputs, unbalanced 1⁄4” jack line level sum output, and sepa­rate volume, and external adjustable mute controls for each channel

• Front panel LED display indicates TX signal received and 5-segment AF level displays for each
channel.

• Front panel dual telescoping retractable antennas

• Exclusive patented companding circuitry and highest quality audio for an unsurpassed 120dB
dynamic range

• Operates on UHF frequencies band from 794.90MHz to 804.88MHz

• Tone Squelch circuitry eliminates On/Off pop and protection from RF interference

• Half-rack receiver and unique snap-out panel locking tabs design for single or dual receivers
(side-by-side) optional rack mounting

• Externally powered with DC adapter (15VDC/0.4A) included

UH-4 Handheld 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

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

• Input level control for optimum sound adjustment

• Rugged ABS housing with integral antenna

UB-4 Bodypack Transmitter

• Compact bodypack with screw on jack for instrument or lavalier microphone input

• 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

• Input level control for optimum sound adjustment (LT/HM)

• Rugged ABS housing with external antenna

14

LINK 4™ Plug-In Transmitter

• Compact microphone transmitter that converts any dynamic XLR hardwired microphone 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 LO/MED/HI gain selection for optimum sound

• Selectable 9V DC phantom powering for lavalier condenser microphone operation

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

• Lightweight, ABS housing with integral antenna

3