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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 (510) 652-2411 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.
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.
DKW-8U
Single Channel UHF Wireless System
NADY SYSTEMS, INC.
6701 Shellmound Street • Emeryville, CA 94608
Tel: 510.652.2411 • Fax: 510.652.5075 • www.nady.com
OWNE R’S MA NUAL
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TABLE OF CONT ENTS
CONTENTS .......................................................................................................2
INTRODUCTION ...............................................................................................2
USING THIS MANUAL .....................................................................................2
SYSTEM FEATURES ........................................................................................3
DKW-8U RECEIVER .........................................................................................4
HT-8U HANDHELD MICROPHONE TRANSMITTER ......................................6
BT-8U BODYPACK MICROPHONE TRANSMITTER ......................................7
SPECIFICATIONS ...........................................................................................10
NOTES ............................................................................................................11
SERVICE ..................................................................................... BACK COVER
INTRO DUCT ION
Thank you for purchasing a Nady DKW-8U Wireless Microphone System and
congratulations on your choice. The Nady DKW-8U is the perfect entry-level
professional wireless, and delivers clear, transparent audio for a variety of singing and speech and wireless instrument applications. The DKW-8U is loaded
with top professional performance and is the best price value available in UHF
wireless systems.
NOTES
USIN G TH IS M ANUAL
This booklet gives instructions for the operation of the DKW-8U wireless, including handheld, instrument, head-mic, and lavalier transmitter systems. The
manual will first list the features of the DKW-8U 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. Please read the instructions for your system completely before
operating the unit. Also included in this manual are system specifications and
servicing information.
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SPECIFICATIONS
SYS TEM FEATURES
DKW-8U OVERALL SYSTEM PERFORMANCE
Frequency Response ................................................................................... 50 Hz - 16 KHz, - 3 dB
Dynamic Range .....................................................................................................................120 dB
Total Harmonic Distortion ........................................................................................................<1%
RF Carrier Frequency Range .................... UHF, choice of single frequencies within 794-805 MHz
Frequency Stability ............................................................................+/- 0.005%, crystal controlled
Modulation .......................................................................................................FM +/-20KHz normal
Operating Range ..................................... Up to 250 ft. typical (depending on site conditions); up to
RECEIVER
Reception Mode ......................................................................................... Mono antenna reception
Squelch..... Fixed
Controls .................................................................................................................... Volume Control
Connectors .......................................... DC In: (2.1mm barrel), Unbalanced Out :1/4” (6.3mm) jack
LED Indicators .................................................................................... Power ON, Signal, AF LEDs
Unwanted Signal Rejection ................................................................... 60dB image and spurious
Power Requirements .......................................................DC 12V @ 200 mA, DC adapter included
Dimensions (Max.) ........................................................... 6.88” x 4.0” x 1.5” (17.5 x 10.2 x 3.8 cm)
Weight ....................................................................................................................... 7.6 oz (0.22 kg)
Antenna .................................................................................. 4” (9.5 cm), Single section telescopic
TRANSMITTERS
Audio Inputs
BT-8U Bodypack ...................................... 3.5mm locking mini-jack, internally switchable inputs:
instrument, headworn mic, or lavalier mic
HT-8U Handheld ...................................... Integral Nady DM-10D neodymium dynamic cartridge
Controls
BT-8U ....................................................ON/STANDBY/OFF, INPUT LEVEL CONTROL, internal
GT/HM/LT switches
HT-8U .............................................................................................................ON/STANDBY/OFF
RF POWER OUT .................................................20mW normal (50mW Maximum allowed by FCC)
HARMONIC and SPURS ..................................................................................................... < -50 dB
Antennas HT-8U/BT-8U ........................................................................................ Internal antennas
Indicators HT-8U/BT-8U ................................ Single LED, flash once “ON”, LOW BAT “Steady ON”
Battery
HT-8U ......................................................................................... 2xAA Alkaline or NiMH batteries
BT-8U .....................................................................................Single 9V Alkaline or NiMH battery
Battery Life ...................................................................................................... 8-10 Hours (Alkaline)
Dimensions
BT-8U Bodypack ................................................. 4.25” x 2.5”x 1.0” (10.8 cm x 6.4 cm x 2.5 cm)
HT-8U Handheld ....................................................................... 10.5”x 1.875” (26.7 cm x 4.8 cm)
Weight
BT-8U Bodypack ............................................................................. 3.1 oz (88 g) without battery
HT-8U Handheld ............................................................................ 7.5 oz (213 g) without battery
DKW-8U Receiver
• Unprecedented value in a single-channel UHF wireless mic/instrument system
with interference-free operation in any application or locale on select UHF
frequencies from 794-805 MHz
• Compact, simple set up to operate — simply plug in instead of your wired
microphones or instrument cable
• All the advantages and freedom of wireless operation without cumbersome
cords
• Excellent high fidelity audio — perfect for public speaking, karaoke/recreational singers, guitarists, DJ’s, and many other applications
• Nady’s proprietary companding circuitry for an industry best 120dB Dynamic
Range, and the clearest, most natural sound available
• 150+ feet typical operating range — up to 300+ feet line-of-sight
• POWER, SIGNAL, AF LED status indicators, adjustable audio output level
for optimal sound and 1⁄4” phone jack output for easy connection to sound
system
• Externally powered by DC power adapter (Included)
HT-8U Handheld Microphone Transmitter
• Features the Nady DM -10D unidirectional neodymium dynamic cartridge for
optimum true sound, maximum feedback rejection and minimal handling noise
• OFF/STANDBY/ON switch allows convenient audio muting while transmitter
“ON”
• Status LED indicator flashes once for unit “ON”; lights steady for low battery
alert
• 2 x AA alkaline or NiMH battery operation
BT-8U Bodypack Transmitter
• Choice of instrument (GT)/headworn(HM)/lavalier(LT) microphone operating
modes in a single bodypack transmitter
• OFF/STANDBY/ON switch allows convenient audio muting while transmitter
“ON”
• Status LED indicator flashes once for unit “ON”; lights steady for low battery
alert
• Locking 3.5mm mini-jack provides secure connection for removable micro-
phone or instrument cable
• Easily accessible input level adjust control for optimum sound (HM/LT operat-
ing modes only)
• Single 9V alkaline or NiMH battery operation
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DKW-8U R ECEI VER
Instrument
GT HM LT
GT HM LT
GT HM LT
Headworn
Lavalier
INPUT SELECTOR
SWITCHES
1. Receiver Placement
This unit is designed for desktop use and can be placed on any flat surface that
is secure. Do not place, however, on amplifiers or other equipment that can get
hot in operation. This unit is not designed for rackmounting.
2. Powering the Receiver
Plug the 12V/0.2A DC ADAPTER (1) provided into the DC IN jack (2) on the
back of the receiver. Then plug the power supply into an AC outlet. The POW-
ER LED (3) will now light and the receiver is operational.
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
it is not recommended.)
9. The DKW-8U receiver is equipped with an AF LED DISPLAY (8). The LED
lights whenever an audio signal is being transmitted from the transmitter.
(Note: The AF LED Display is not a peak level indicator so it can light continuously during audio signal input to the transmitter.)
3. Antenna
The DKW-8U receiver is supplied with an attached FOLDING ANTENNA (4).
This should be extended fully to obtain maximum range. Optimal antenna position is 45 degrees from the receiver. For maximum range, it is always best to
maintain a line of sight (no obstructions) between the receiver and the transmitter antenna at all times whenever possible.
4. Mute (Squelch)
The DKW-8U has a preset mute (Squelch) internally for maximum range and
performance. There is no need to adjust this. In normal operation, the SIGNAL
LED (5) should be lit when the transmitter is transmitted. However, when the
SIGNAL LED (5) extinguishes, the transmitter is out of range for that given lo-
cation, and the user should move closer to the receiver to re-establish the radio
link.
5. Connecting the Audio Output
The DKW-8U receiver provides with an adjustable 1⁄4” line level AUDIO OUT
JACK (6).
(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 HT-8U handheld microphone or the BT-8U transmitter with either a
headworn or lavalier microphone transmitter)
For microphone use, the 1/4” line level AUDIO OUT can be used. Plug one end
of a 1/4” audio cable into the AUDIO OUT JACK (6) located in the back of the
receiver. Plug the other audio cable end to you mixing board input. Make sure
the phantom power on your mixing board is turned off and the volume in turned
down when making the audio connections. Start the receiver VOLUME (7) at
MINIMUM and adjust until the volume level is optimal.
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16
23
22
21
20
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14
17 18 19
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6. Instrument Use
Secure the connection from the GT CABLE (17) 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 OFF/STANDBY/ON SWITCH (21) to either “STANDBY or ON”
position. Adjust the volume of the receiver as per the Connecting the Audio
Output of the above DKW-8U receiver instructions.
(Note: The INPUT LEVEL CONTROL (23) is deactivated and not used when
the BT-8U is in INSTRUMENT (GT) mode. Levels should be adjusted with the
volume control of your instrument.)
Instrument Connection
(Using the BT-8U transmitter with instruments)
To use the 1/4” line level AUDIO OUT JACK (6) for instrument use, follow the
instructions for the Microphone Connection (above), except start the receiver
VOLUME (7) at 1/2 MAX and adjust until the volume level is optimal.
(Note: 1:1 with a directly connected cord from the instrument to the amp is with
the volume about 3/4 MAX, and MAX volume from the receiver will be about
4dB higher than 1:1. If the volume control is set too high, you may overload
your mixer or amp.)
(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 (17) 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.)
7. Microphone Use (with either a lavalier or headworn microphone)
Secure the connection from the LAVALIER (19) or HEADWORN MIC CORD
(18) 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. When ready to speak, slide the OFF/STANDBY/ON SWITCH (21) to the
either “STANDBY or ON” position.
Adjust the volume of the receiver as per the Connecting the Audio Output
above DKW-8U 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 lavalieres, 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].
6. AF LED Display
The DKW-8U receiver is equipped with an AF LED DISPLAY (8). The LED
lights whenever an audio signal is being transmitted from the transmitter.
(Note: The AF LED Display is not a peak level indicator so it can light continuously during audio signal input to the transmitter.)
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5
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8. For optimum performance, an INPUT LEVEL CONTROL (23) 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 1/2 maximum. For headworn mic use, it may be advisable to turn the gain down somewhat, depending
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HT-8U HA NDHE LD M IC T RANS MITT ER
BT-8U BO DYPACK MIC TR ANSM ITTE R
1. Release the BATTERY COVER (9) by pressing the locking tab and slide
down as per the arrow, exposing the BATTERY HOLDER (10). Insert two
fresh AA alkaline or NiMH batteries, observing the correct polarity as marked,
and slide the battery cover back on to the microphone. Make sure the cover is
closed 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 battery after every 6-8 hours of use. NiMH batteries should be replaced with
fresh ones recharged fully (with separate charger, not supplied, and as per its
charging instructions) whenever low or dead battery status is indicated as per
the following.
2. Turn on the HT-8U by sliding the OFF/STANDBY/ON SWITCH (11) to
the STANDBY position first (transmitter on, audio muted) or the ON position
(transmitter and audio both on). The BATTERY INDICATOR LED (12) 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.
3. The microphone is now ready to use. The SIGNAL LED (5) on the DKW-8U
receiver should now be lit, indicating a received signal from the transmitter.
When ready to speak, slide the OFF/STANDBY/ON SWITCH (11) to the ON
position. Adjust the volume of the receiver as per the Connecting the Audio
Output of the above DKW-8U 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.]
(Back)
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1. Snap open the BATTERY DOOR (13) and insert a fresh 9V alkaline or NiMH
battery into the BATTERY COMPARTMENT (14) observing the correct polarity.
Close the battery door to its original position and completely cover the battery.
Fresh alkaline batteries can last up to 10 hours in use, but in order to ensure
optimum performance, it is recommended that the battery be replaced after 6-8
hours of use. A NiMH battery should be replaced with another recharged fully
(with separate charger, not supplied, and as per its charging instructions) whenever low or dead battery status is indicated as per the following.
2. Selecting Audio Input Operating Mode
The BT-8U is equipped with two INPUT SELECTOR SWITCHES (15) located
under the cover on the circuit board 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, and LAVALIER MIC
(Condenser Microphones).
(Note: Use only the input audio source as per the input selected with the
internal AUDIO INPUT SELECTOR SWITCHES (15) or the audio will not be
optimal–a muddy or distorted sound may result.)
There are two switches with selectable positions GT, HM, LT together at the
same time.
To select inputs: (see chart on page 9)
A. Instrument — set both switches to “GT”
B. Headworn Mic — set both switches to “HM”
C. Lavalier Mic — set both switches to “LT”
3. Connecting for Selected Input
The BT-8U is provided with a 3.5 mm LOCKING JACK (16) for connecting
the audio input selected. Connect either the INSTRUMENT CORD (17) or the
HEADWORN MIC (18) or LAVALIER MIC CORD (19) as desired, according to
the input selected. 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 (20) it on to your clothes or instrument strap (if using the
BT-8U as an instrument transmitter).
4. Turn on the BT-8U by sliding the OFF/STANDBY/ON SWITCH (21) to the
STANDBY position (transmitter on, audio muted) or the ON position (transmitter and audio both on). The BATTERY INDICATOR LED (22) will give a single
(Front)
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12
quick flash, indicating usable battery strength. In the case of a dead or low battery, the LED either will not go on at all or will stay on continuously, indicating
that the battery should be replaced with a fresh one. To conserve battery life,
turn unit off when not in use.
5. The BT-8U transmitter is now ready to use. The SIGNAL LED (5) on the
DKW-8U receiver should now be lit, indicating a received signal from the transmitter. Adjust the volume of the receiver as per the Connecting the Audio Output
of the above DKW-8U receiver instructions.
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