Nady UHF-3 operating instructions

UHF-3

Single Channel UHF DigiTRU Diversity

Wireless System

CONTENTS

CONTENTS ...........................................................................................2

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

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

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

UHF-3 RECEIVER .................................................................................... 4

UH-3 HANDHELD MICROPHONE TRANSMITTER ...................................... 7

UB-3 BODYPACK MICROPHONE TRANSMITTER ......................................8

SPECIFICATIONS ................................................................................. 11

SYSTEM FEATURES

UHF-3 RECEIVER

• Half-rack receiver design with retractable front panel dual antennas

• Clear channel operation on the wide open, uncluttered UHF band
for interference-free performance in any application or locale

• Nady’s proprietary companding circuitry for an industry best 120dB
Dynamic Range, and the clearest, most natural sound available

• Tone Squelch™ for locking out potential interference

• UHF-3 receiver with DigiTRU Diversity™ for maximum range and
dropout protection, full LED indicators, both 1/4" unbalanced and XLR
balanced outputs, and special circuitry for noiseless transmitter
ON/OFF switching

• Mute (squelch) adjust control

• Externally powered by AC/DC power adapter

• Unique snap-out panel locking tabs for single receiver or dual receiver
(side-by-side) optional rack mounting

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

INTRODUCTION

Thank you for purchasing a Nady UHF-3 Diversity Wireless Microphone System and
congratulations on your choice. The UHF-3 is loaded with top professional operating
features and is the best performance and price value available in UHF diversity
wireless systems.

USING THIS MANUAL

This booklet gives instructions for the operation of the UHF-3 wireless, including
handheld, instrument, lavalier, headmic and plug-in transmitter systems. Please read
the instructions for your system completely before operating unit.

This manual will first list the features of the UHF-3 and then will take you step by step
to show you how to operate your new system. After reading the receiver instructions,
turn to the section of the booklet that covers the type of transmitter used with your new
system. Each section will give you detailed operating instructions. Also included in this
manual are system specifications and servicing information.

UH-3 HANDHELD MIC TRANSMITTER

• Features the Nady DM -10D unidirectional neodymium dynamic cartridge for
optimum true sound, maximum feedback rejection and minimal handling noise

• Audio mute switch allows convenient audio muting with the
transmitter "ON"

• Status LED indicator flashes once for unit "ON"; lights steady for
low battery alert

• Convenient, economical operation with two AA Alkaline or NiMH batteries

UB-3 BODYPACK TRANSMITTERS

• Choice of instrument or headworn/lavalier microphone bodypack transmitter

• Audio mute switch allows convenient audio muting with the
transmitter "ON"

• Bicolor LED status indicator: Unit “ON” (green), Low Battery Alert (orange)

• Locking 3.5mm mini-jack provides secure connection for removable
microphone or instrument cable

• Easily accessible input level adjust control for optimum sound

• Convenient, economical operation with two AAA Alkaline batteries

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3

UHF-3 RECEIVER

1. Rackmounting the Receiver

There are 2 options available for rackmounting the UHF-3 receiver: singly or side-by­side with another UHF-3 Series receiver.

a. Single mounting: Remove the receiver SIDE MOUNT CLIP (1) from each side of

the receiver (as shown) and slide in the optional ERM-3 RACK EARS (2).

b. Side-by-side double mounting: After removing the SIDE MOUNT CLIPS (1) from

both UHF-3 receivers, join the two receivers with the EJC-3 JOINING CLIP
(3) and attach the ERM-33 RACK EARS (4) as shown.

the receiver in a rack directly above an amplifier or other source of high heat –
this could degrade the performance of the UHF-3. Always ensure adequate
airflow and heat dissipation in any rack configuration.)

2. Powering the Receiver

Plug the 12V AC/DC ADAPTER (5) provided into the DC INPUT JACK (9) on the back
of the receiver. Then plug the power supply into an AC outlet.

source with 400mA capability can also be used.)

Press the POWER SWITCH (11)
once to turn on the receiver. The POWER ON LED (12) will now light and the receiver
is operational.

3. Antennas

The UHF-3 receiver is supplied with TELESCOPIC ANTENNAS (15). These should be
extended fully to obtain maximum range. Optimal antenna position is 45 degrees
from the receiver (at 90 degrees from each other). For maximum range, it is always
best to maintain a line of sight (no obstructions) between the receiver antennas and
the transmitter at all times whenever possible.

4. Mute (Squelch) Adjustment

In normal operation, the SQUELCH CONTROL (6) should be set fully clockwise to the
factory preset RF level (Max. Sens.). However, in areas of high RF activity, the squelch
(or mute, as it is sometimes called) may need to be adjusted to compensate for the
adverse conditions in a particular location. If, with the transmitter off, the receiver’s A
and/or B DIVERSITY LED INDICATORS (13) flicker or stay on, the squelch control
should be turned counterclockwise until the A and/or B LEDs extinguish. When the
squelch is properly adjusted, the A and/or B LEDs will only light when the system
transmitter is turned on. Turning the squelch control too far counterclockwise will
reduce the range, but yield a quieter squelch (mute) function. During operation,
especially at ranges greater than 75 feet, one or the other of the A or B LEDs may
extinguish briefly. This is normal–the unit’s DigiTRU Diversity™ reception ensures that
the received audio will not be interrupted. When both LEDs extinguish, the transmitter
is out of range for that given location, and the user should move closer to the receiver
to re-establish the radio link.

(Note: Do not mount

(Note: Any 12V DC

5. Connecting the Audio Output
The UHF-3 receiver provides both a fixed mic level BALANCED MIC AUDIO OUTPUT
XLR (7) and an adjustable line level AUX AUDIO OUTPUT 1/4" jack (10).

(Note: As when making any connection, make sure the amplifier or mixing board
volume is at the minimum level before plugging in the receiver to avoid possible
sound system damage.)

Microphone Connection

(using the UB-3 transmitter with either a headworn or lavalier microphone or the
UH-3 handheld microphone transmitter) For microphone use, either the BALANCED
MIC AUDIO OUTPUT XLR (7) or the 1/4" line level AUX AUDIO OUTPUT (10) can be
used. The XLR output is set at a non-adjustable microphone level, similar to hardwired
mic levels. Plug an XLR connector into the XLR output socket on the rear of the unit
and plug the other end into your amplifier or mixing board. Make sure the phantom
power on your mixing board is turned off and the volume is turned down when
making connections. For your convenience, the XLR output level is preset at the
factory and is not adjustable with the receiver volume control.

To use the 1/4" AUX AUDIO OUTPUT socket, follow the instructions for the Instrument
Connection (above), except start the receiver volume at 1/2 MAX and adjust until the
volume level is optimal. If the volume control is set too high, you may overload your
mixer or amp.

The UHF-3 receiver is equipped with a 5 segment LED AF LEVEL DISPLAY (14).
Occasional flickering of the top AF Peak LED indicator on loud inputs to the
transmitter is normal. If this LED lights continuously, decrease the volume to the
transmitter or overload distortion may result.

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98 6

14

UH-3 HANDHELD MICROPHONE TRANSMITTER

15

7

5

Unscrew the BATTERY COMPARTMENT COVER (16) and remove, exposing the
BATTERY HOLDER (17). Insert 2 fresh AA ALKALINE BATTERIES (18), observing the
correct polarity as marked, and screw the cover back on to the microphone. Make
sure the cover is screwed on completely. Fresh alkaline batteries can last up to 10
hours in use, but in order to ensure optimum performance, it is recommended that
you replace the batteries after every 7-8 hours of use.

Turn on the UH-3 by sliding the audio MUTE SWITCH (19) to the OFF position first.
Then slide the POWER SWITCH (21) to the ON position. The TX LED indicator (22)
will stay on. The battery indicator LED (20) will give a single quick flash, indicating
usable battery strength. In the case of a dead or low battery, the LED will either not
go on at all or will stay on continuously, indicating that the batteries should be
replaced with fresh ones. To preserve battery life, turn the transmitter off when not in
use.

The microphone is now ready to use. The A and/or B DIVERSITY LED INDICATORS
(13) on the UHF-3 receiver should now be lit, indicating a received signal from the
transmitter. When ready to speak, slide the audio MUTE SWITCH (19) to the ON
position. Adjust the volume of the receiver as per the Audio Output Microphone
Connection section of the above UHF-3 receiver instructions.

[Note: Observe care in selecting P.A. volume, transmitter location and speaker
placement so that acoustic feedback (howling or screeching) will be avoided.]

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3

4

6

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19

21

22

20

7

UB-3 BODYPACK MICROPHONE TRANSMITTER

1. Open the hinged BATTERY DOOR (23) and insert 2 fresh AAA ALKALINE
BATTERIES into the BATTERY COMPARTMENT (24), observing the correct polarity.
Fresh alkaline batteries can last up to 5 hours in use, but in order to ensure optimum
performance, it is recommended that the batteries be replaced after 3-4 hours of use.

2. The UB-3 is equipped with an INPUT SELECTOR SWITCH (32) located under the
cover for selecting the type of audio input you will be supplying to the transmitter.
Select from the choice of three positions: INSTRUMENT (for guitar, bass, etc.)/
HEADWORN MIC/ LAVALIER MIC.

3. The UB-3 is provided with a 3.5 mm LOCKING JACK (26) for connecting the audio
input selected. Connect either the INSTRUMENT CORD (34) or the HEADWORN MIC
(35) or LAVALIER MIC CORD (36) as desired, according to the input selected. (Note:
Use only the input audio source as per the input selected with the AUDIO INPUT
SELECTOR SWITCH or the audio will not be optimal–a muddy or distorted sound may
result.) To secure the connection, turn the slip ring on the plug clock wise to thread
it on the jack. To unplug, reverse the process. Slip the transmitter into a pocket or CLIP
(33) it on to your clothes or instrument strap (if using the UB-3 as an instrument
transmitter).

4. Turn on the UB-3 by sliding the audio MUTE SWITCH (27) to the ON position first.
Then slide the POWER SWITCH (29) to the ON position. The battery indicator LED
(28) will give a single quick flash, indicating usable battery strength. In the case of
dead or low batteries, the LED will either not go on at all or will stay on continuously,
indicating that the batteries should be replaced with fresh ones. To preserve battery
life, turn the transmitter off when not in use. The A AND/OR B DIVERSITY LED
INDICATORS (13) on the UHF-3 receiver should now be lit, indicating a received
signal from the transmitter.

5. Instrument Use
Secure the connection from the GT CABLE (34) by turning the slip ring on the plug
into the transmitter clockwise to thread it on the jack. To unplug, reverse the process.
Plug the 1/4” phone plug into the instrument. When ready to play, slide the audio
MUTE SWITCH (27) to OFF position Adjust the volume of the receiver as per the
Audio Output Instrument Connection section of the above UHF-3 receiver instruction.

(Note: The INPUT LEVEL CONTROL (25) is deactivated and not used when the UB-3 is
in INSTRUMENT mode. Levels should be adjusted with the volume control of your
instrument.)

The UHF-3 receiver is equipped with a 5 segment LED AF LEVEL DISPLAY (14).
Occasional flickering of the top AF Peak LED indicator on loud inputs to the
transmitter is normal. If this LED lights continuously, turn down the INPUT LEVEL
CONTROL (25) on the UB-3 transmitter, or noticeable distortion may result.

(Note: Scratchy noises can sometimes occur when some electric guitars with dirty pots
or connections are used with any wireless system. Therefore, the supplied
INSTRUMENT CORD (34) has a factory installed capacitor inside the 1/4" plug. This
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:

1) Make sure all guitar volume and tone pots are clean and all contacts are solid–this
is very important.

2) A 47pf capacitor soldered across the hot to ground terminals of the guitar’s
volume and tone pots will provide extra filtering.)

6. Microphone Use (with either a lavalier or headworn microphone)
Secure the connection from the LAVALIER (36) or HEADWORN MIC CORD (35) by
turning the slip ring on the plug into the transmitter clockwise to thread it on to the
jack. To unplug, reverse the process. To use the lavalier mic, attach it at chest level.
Do not place it too close to the mouth–a distance of about six inches usually works
best. To use the headworn mic, place it on the head and adjust the boom so that the
mic is about one inch to the side of the front of the mouth. As the microphone cord
also serves as the antenna, be sure to extend it fully. Rolling up or shortening the cord
may reduce the effective operating range–keep it as straight as possible. When ready
to speak, slide the audio MUTE SWITCH (27) to the ON position. Adjust the volume of
the receiver as per the Audio Output Microphone Connection section of the above
UHF-3 receiver instruction

[Note: Observe care in selecting P.A. volume, transmitter location and speaker
placement so that acoustic feedback (howling and screeching) will be avoided. Please
also note the pickup pattern characteristics of the microphone selected.
Omnidirectional mics pick up sound equally from all directions, and are prone to
feedback if not used carefully. Unidirectional mics are more resistant to feedback, but
pick up sound sources best that are directly in front of the mic. Also, mics that are
farther from the sound source, such as lavaliers, require more acoustic gain and thus
are also more prone to feedback than close-source mics such as handheld or
headworn models that are used close to the mouth].

For optimum performance, an INPUT LEVEL CONTROL (25) is provided. Adjust the
gain by turning the control with a small screw driver. For lavalier mic use, it is
recommended that the level be set at about 2/3 maximum. For headworn mic use, it
may be advisable to turn the gain down somewhat, depending on the volume levels
expected. In either application, experiment and set for maximum possible gain
without audible distortion on the high level peaks. (Note: Turning down the gain too
much can compromise the signal-to-noise and is not recommended.)

The UHF-3 receiver is equipped with a 5 segment LED AF LEVEL DISPLAY (14).
Occasional flickering of the top AF Peak LED indicator on loud inputs to the
transmitter is normal. If this LED lights continuously, but if the LED stays lit
continuously, turn down the INPUT LEVEL CONTROL (25) on the UB-3 transmitter, or
noticeable distortion may result.

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SPECIFICATIONS

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34 35 36

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UHF-3 OVERALL SYSTEM PERFORMANCE

Frequency Response 30 Hz - 18 KHz, +/– 3 dB
Dynamic Range 120 dB
Total Harmonic Distortion < 0.6%
RF Carrier Frequency Range UHF, choice of single frequencies from 470-500 MHz
Frequency Stability +/- 0.005%, crystal controlled
Modulation FM (F3E), +/-20KHz normal
Operating Range Up to 250 ft. typical (depending on site conditions); up to

500+ feet optimum line-of-sight

RECEIVER

Reception Mode DigiTRU Diversity™ (Dual Antenna)
Squelch External Control, Tone Key (30.720 KHz)
Controls Power ON/OFF, Volume Control, Squelch (Mute) Adjust
Connectors DC in, 1/4”(6.3 mm) unbalanced phone jack (360 mV/

no load), XLR balanced output (+/-24 mV/600 Ohm load)

LED Indicators Power ON, Diversity A/B, Audio Peak
Unwanted Signal Rejection 60dB image and spurious
Power Requirements DC 18V @ 250 mA, AC/DC adapter included
Dimensions (Max.) 1.75" x 7.5" x 8.1" (4.4 x 19 x 20.7 cm)
Weight 1.6 lbs (.73 kg)
Antenna 11.2" (28.5 cm), dual telescopic

TRANSMITTERS

Audio Inputs UB-3 Bodypack: 3.5mm locking mini-jack, 3-way select

switch for inputs: instrument, headworn mic,
or lavalier mic
UH-3 Handheld: Integral Nady DM-10D neodymium
dynamic cartridge

Controls UB-3: POWER/MUTE ON/OFF, INSTRUMENT/

HEADWORN MIC/LAV MIC, INPUT LEVEL

UH-3: POWER/MUTE ON/OFF

LED Indicator UB-3: Bicolor, Unit “ON” (green), Low Battery

Alert (orange)

UH-3: Unit “ON” (single flash), Low Battery Alert (steady)
RF Power Out 50mW nominal (maximum allowed by FCC)
Harmonic & Spurious Emissions < –50 dB
Battery UH-3: AA Alkaline (2x) UB-3: AAA Alkaline (2x)
Battery Life UH-3: 8-10 Hours (150mA draw typical) UB-3: 4-5 Hours
Dimensions UB-3 Bodypack: 3.25” x 2.187”x 1”

(8.25 cm x 5.53 cm x 2.54 cm)

UH-3 Handheld: 2”x 9”

(5.08 cm x 22.86 cm)

Weight UB-3 Bodypack: 2.25 oz (0.064 kg) without battery

UH-3 Handheld: 10.15 oz (0.28 kg) without battery

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SERVICE

(U.S.) Should your Nady Wireless Microphone System require service, please contact

the Nady Service Department via telephone at [phone] or e-mail to
[e-mail] 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 and enclose a cashier's check or money order (if not prepaid with a credit
card). Ship the unit prepaid to: Nady Systems, Inc., Service Department, 6701
Shellmound Street, Emeryville, CA 94608. Include a brief description of the problems
you are experiencing.

The warranty card enclosed with this system contains additional valuable
warranty and service information. Keep it in a safe place for future possible
reference. Do not attempt to service this unit yourself as it will void the warranty.

(International) For service, please contact the Nady distributor in your country

through the dealer from whom you purchased this product.

Nady Wireless Systems are type accepted under FCC rules parts 90, 74 and 15. The
device complies with RSS-210 of Industry & Science Canada. Operation is subject to
the following two conditions: (1) this device may not cause harmful interference and (2)
this device must accept any interference received, including interference that may
cause undesired operation.

NADY SYSTEMS, INC.

6701 Shellmound Street • Emeryville, CA 94608 USA
Tel: [phone] • Fax: [phone]
www.nady.com

OWNER'S MANUAL