Nady Systems Microphone U 33B User Manual

U-33B  
UHF Bass Wireless Microphone System  
DigiTRU Diversity™  
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: 510/652-2411 • Fax: 510/652-5075  
OWNER'S MANUAL  
 
CONTENTS  
SPECIFICATIONS  
U-33B OVERALL SYSTEM PERFORMANCE  
CONTENTS ....................................................................................................... 3  
INTRODUCTION ................................................................................................ 3  
USING THIS MANUAL ....................................................................................... 3  
FEATURES ......................................................................................................... 4  
U-33B RECEIVER................................................................................................ 5  
UB-33B BASS WIRELESS TRANSMITTER............................................................... 8  
SPECIFICATIONS ............................................................................................. 10  
SERVICE .......................................................................................................... 11  
Frequency Response  
Dynamic Range  
30 Hz - 18 KHz, – 3 dB  
120 dB  
Total Harmonic Distortion  
RF Carrier Frequency Range  
Frequency Stability  
Modulation  
< 0.6%  
UHF, choice of single frequencies from 470-500 MHz  
0.005%, crystal controlled  
FM (F3E), 10KHz normal, 40KHz max  
Up to 250 ft. typical (depending on site conditions); up to  
500+ feet optimum line-of-sight  
Operating Range  
U-33B BASS RECEIVER  
Reception Mode  
Squelch  
DigiTRU Diversity™ (Dual Antenna)  
External Control  
Controls  
Connectors  
Power ON/OFF, Volume Control, Squelch (Mute) Adjust  
DC in, 1/4”(6.3 mm) unbalanced phone jack (225 mV/  
no load), XLR balanced output ( 20 mV/600 Ohm load)  
+8dB @ 100Hz  
Power ON, Diversity A/B, Audio Level and Peak  
60dB image and spurious  
DC 18V @ 250mA, AC/DC adapter included  
1.75" x 7.5" x 8.1" (4.4 x 19 x 20.7 cm)  
1.6 lbs (.73 kg)  
Bass Booster Control  
LED Indicators  
Unwanted Signal Rejection  
Power Requirements  
Dimensions (Max.)  
Weight  
INTRODUCTION  
Antenna  
11.2" (28.5 cm), dual folding antennas  
Thank you for purchasing a Nady U-33B Bass Wireless Microphone System and  
congratulations on your choice. The U-33B is loaded with top professional operating  
features and is the best performance and price value available in UHF diversity bass  
wireless systems.  
UB-33B BASS TRANSMITTER  
Audio Inputs  
Controls  
3.5mm instrument locking mini-jack  
POWER, AUDIO ON/OFF  
Bi-color, Unit “ON” (green), Low Battery  
Alert (orange)  
LED Indicator  
RF Power Out  
Harmonic & Spurious Emissions  
Battery  
50mW nominal (maximum allowed by FCC)  
< –50 dB  
AAA Alkaline (2x)  
USING THIS MANUAL  
Battery Life  
4-5 Hours  
Dimensions  
Weight  
3.25” x 2.187”x 1” (8.25 cm x 5.53 cm x 2.54 cm)  
2.25 oz (0.064 kg) without battery  
This booklet gives instructions for the operation of the U-33B UHF wireless system.  
Please read the instructions for your system completely before operating unit.  
This manual will first list the features of the U-33B and then will take you step by step  
to show you how to operate your new system. Included in this manual are system  
specifications and servicing information.  
3
10  
 
SYSTEM FEATURES  
U-33B BASS RECEIVER  
• Specially customized for use with bass guitar transmitter and features Enhanced  
Headroom™ for maximized possible clarity and distortion-free audio  
• Unique user adjustable Bass Boost™ control for dialing in the exact desired bass  
punch and presence missing in standard wireless  
• Nadys proprietary companding circuitry for an industry best 120dB Dynamic  
Range, and clearest, most natural sound available  
18  
19  
21  
20  
• Clear channel operation on the wide open, unclustered UHF band for interference-  
free performance in any application or locale  
• DigiTRU Diversity™ for optimum range and dropout protection  
• A-B antenna LED indicators  
• 5-LED AF display for monitoring audio level  
• Unbalanced 1/4" and balanced XLR outputs (for bass amp or direct mixer feeds,  
or both). Volume control for unbalanced line output. Fixed level for XLR output  
• External Mute (squelch) adjust control  
• Half-rack receiver design with folding front panel dual one section telescopic  
antennas  
23  
• Unique snap-out panel locking tabs for half-rack single receiver or full rack (side-  
by side) dual receivers mounting with option accessory  
• Externally powered by AC/DC power adaptor  
UB-33B BASS TRANSMITTER  
• Compact small sized  
• Removable rubber ducky antenna  
• Customized specially for use with U-33B bass guitar receiver. Features enhanced  
Headroom™ for maximum possible clarity and distortion-free audio, even with  
high output active pickups  
• Audio mute switch allows convenient audio muting with the transmitter “ON”  
• Bi-color LED status indicatior: “ON” (green), Low Battery Alert (Orange)  
• Locking 3.5mm mini-jack provides secure connection for removable instrument  
cable  
17  
• Convenient, economical operation with two AAA Alkaline or NiMH batteries  
16  
24  
9
4
 
UB-33B BASS WIRELESS TRANSMITTER  
U-33B RECEIVER  
1. Open the hinged BATTERY DOOR (16) and insert 2 fresh AAA ALKALINE  
BATTERIES into the BATTERY COMPARTMENT (17), 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.  
1. Rackmounting the Receiver  
There are 2 options available for rackmounting the U-33B receiver: singly or side-by-  
side with another U-33B 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 U-33B receivers, join the two receivers with the EJC-3 JOINING CLIP  
(3) and attach the ERM-33 RACK EARS (4) as shown. (Note: Do not mount  
the receiver in a rack directly above an amplifier or other source of high heat –  
this could degrade the performance of the U-33B. Always ensure adequate  
airflow and heat dissipation in any rack configuration.)  
2. The UB-33B is provided with a 3.5 mm LOCKING JACK (18) for connecting the  
audio input selected. Connect either the INSTRUMENT CORD (24), 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 (23) it onto your  
clothes or instrument strap.  
3. Turn on the UB-33B by sliding the audio AUDIO SWITCH (19) to the OFF position  
first then slide the POWER SWITCH (21) to the ON position. The Bi-Color LED  
indicator (20) will stay on (GREEN), indicating usable battery strength and that the  
transmitter is on. In the case of dead or low batteries, the LED will either not go on at  
all or will stay on (ORANGE) 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 or B Diversity LED indicators (13) on the U-33 receiver should now be lit,  
indicating a received signal from the transmitter.  
2. Powering the Receiver  
Plug the 18V 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. (Note: Any 18V DC  
source with 250mA 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  
4. Instrument Use  
The U-33B receiver is supplied with FOLDING 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.  
Secure the connection from the GT CABLE (24) 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  
SWITCH (19) to “ON” position. Adjust the volume of the receiver as per the Audio  
Output Instrument Connection section of the above U-33B receiver instruction.  
(Note: The UB-33B is supplied with a removable antenna. It should be operated with  
the supplied antenna all times. For optimum operating range, always maintain line-  
of-sight between the transmitter and the receiver 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 receivers A  
or B DIVERSITY LED INDICATORS (13) flicker or stay on, the squelch control should  
be turned counterclockwise until the A or B LEDs extinguish. When the squelch is  
properly adjusted, the A 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  
normalthe units DigiTRU Diversityreception 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.  
5
8
 
5. Bass Boost Control  
Ordinary wireless systems all sound somewhat thinner (with less bass) than  
hardwired. This is due to (1) natural side effects of the noise reduction circuitry  
employed, and (2) lack of the high-frequency roll-off normally caused by longer  
hardwired cable runs. Adjust the BASS BOOST (15) control to add back low  
frequency content in your signal as desired. This is a low-pass filter, with up to 6 dB  
of gain, over flat respsonse centered in the 30-300Hz, when turned fully clockwise.  
The normal wireless sound is with the control left fully counterclockwise.  
15  
15  
6. Connecting the Audio Output  
The U-33B receiver provides both a fixed mic level BALANCED AUDIO OUTPUT XLR  
(7) and an adjustable line level UNBALANCED AUDIO OUTPUT 1/4" JACK (10). The  
level from the UNBALANCED OUTPUT is controlled by the rear panel VOLUME  
CONTROL (8).  
12  
11  
14  
13  
Insert an audio cord with a 1/4" mono phone plug in the UNBALANCED OUTPUT  
JACK (10) on the rear panel of the receiver. Plug the other end of the cord into an  
amplifier, effects, or mixing board. Adjust the VOLUME CONTROL (8) on the U-33B  
receiver clockwise to maximum rotation, until the volume level is comfortable for your  
application. This setting is roughly equivalent to a direct instrument cord connection.  
(Note: You can connect both outputs at the same time for added versatility in use. For  
example, simultaneously hook up the UNBALANCED AUDIO OUTPUT (10) to your  
bass amplifier and the BALANCED AUDIO OUPUT (7) to the FOH mixer.)  
VOLUME  
BASS BOOST  
MUTE  
UNBALANCED OUT DC INPUT  
BALANCED OUT  
5
9
8
6
15 10  
7
(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. Also make sure that the phantom power on the input of the  
mixer is turned OFF before making connection to the receiver.)  
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