Nady Systems OCTAVO U-81 Manual de usuario

OWNER’S MANUAL

U-81 OCTAVO

Eight Discrete UHF Channels

Wireless Microphone System

TABLE OF CONTENTS

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

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

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

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

U-81 OCTAVO RECEIVER OPERATION INSTRUCTIONS ............................................ 4

UH-81 HANDHELD TRANSMITTER ............................................................................... 6

UB-81 BODYPACK TRANSMITTER ............................................................................... 7

CAUTIONS AND TROUBLESHOOTING ...................................................................... 10

TIPS.................................................................................................................................11

SPECIFICATIONS.......................................................................................................... 12

FREQUENCY PLAN ...................................................................................................... 13

SERVICE INFORMATION.............................................................................................. 14

WARRANTY................................................................................................................... 15

INTRODUCTION

Thank you for choosing the

Nady U-81 OCTAVO

wireless system, we know you will be

very pleased with its performance and features. The

Nady U-81 OCTAVO

is a professional

8-channel UHF wireless system

which offers the clearest, most natural sound available

in wireless today. The Nady U-81 OCTAVO delivers eight discrete channels on selected

frequency bands 902-928MHz and 944-952MHz for interference-free performance in

any application or locale

It also features Nady’s proprietary companding and low noise

circuit for an industry best 120dB dynamic range.

USING THIS MANUAL

This booklet provides information regarding the use of the U-81 OCTAVO wireless

systems: The U-81 OCTAVO wireless microphone receiver, the UH-81 Handheld

Microphone transmitter and the UB-81 bodypack microphone transmitter. It includes

a description of features and a step-by-step guide to operation of the unit. This manual

should answer any questions you may have about the operation and servicing of your

U-81 OCTAVO wireless system.

SYSTEM FEATURES

U-81 OCTAVO Wireless Receiver

• Operates on select UHF frequencies on 902-928MHz and 944-952 MHz bands

• Eight independent single-channel UHF wireless receivers in a single housing for

simultaneous operation for up to eight transmitters

• Front panel LED display indicates the RF and AF status for each channel

• Ch 1-8 individual balanced xed XLR MIC level outputs and adjustable Unbalanced

LINE level SUM 1⁄4” jack output for 8-in-1 MIX audio output with separate volume

control for each channel

• Nady’s exclusive patented companding circuitry with 120dB dynamic range and

highest quality audio for an unsurpassed UHF performance

• Dual removable high gain antennas with TNC connector, front or back mounting

• Standard 19” 1U, all-metal rack mount housing

• Externally powered with AC/DC adapter included

• Choice of any combination of 2 transmitters: UH-81 and/or UB-81

UH-81 Handheld Microphone Transmitter

• Nady DM-50D neodymium cartridge delivers transparent vocals, maximum feedback

rejection and minimal handling noise

• ON/STDBY/OFF switch allows convenient audio muting while transmitter “ON”

• Status LED indicator ashes once for unit “ON”; lights steady for low battery alert

• 2 X AA alkaline or NiMH battery operation

• Rugged ABS and rubber-coated housing with integral antenna

UB-81 Bodypack Transmitter

• Choice of headworn or lavalier microphone operation with convenient input volume

control for proper level adjust

• OFF/STDBY/ON switch allows convenient audio muting while transmitter “ON”

• Status LED indicator ashes once for unit “ON”; lights steady for low battery alert

• Single 9V alkaline or NiMH battery

• Lightweight, rugged ABS housing with integral antenna

U-81 OCTAVO RECEIVER OPERATING INSTRUCTIONS

1. Rack-Mounting The Receiver

The U-81 OCTAVO receiver has pre-drilled holes for rackmounting. Simply attach the

Rack Mount Ears (1) on each side and fasten with supplied screws.

(Note: Do not mount the receiver in a rack directly above an amplier or other source

of high heat. This could degrade the performance of the U-81 OCTAVO. Always ensure

adequate airow and heat dissipation in any rack conguration.)

2. Installing Antennas

If not rackmounting the receiver, the two Antennas (2a) can be mounted directly on

the Receiver Antenna Input Jacks (2b) on the receiver’s back panel. If rackmounting,

antennas can be front mounted on the Rack Ear Jacks (2d), after installing the jacks

on the Rack Ears (1) provided. Use the Antenna Connecting Cables (2c) to feed the

received signal to the receiver’s antenna jacks as pictured, connecting them from the backs

of the rack ear jacks to the receiver antenna jacks. The optimal positions of the antennas

are 45° from the receiver, so 90° from each other.

3. Powering The Receiver

Powering the receiver by plugging the provided 15VDC/1000mA adaptor into the

DC INPUT jack (3) on the back of the receiver; then plug the adapter into an AC outlet.

(Note: Any 15VDC source with 1200mA capacity can also be used.) Turn volume

controls of all channels counterclockwise for minimum setting. Once the receiver is

connected to a power source, press the power switch to the ON position, Power LED

indicator (4) is ON. The TX LEDs indicator (7) and AF LEDs indicator (8) on the front

panel of the receivers will not light up at this time, but only until one or more of the eight

channels is receiving a signal from your system’s transmitters. To turn OFF, press the

Power Switch (5) to the OFF position.

4. Mute (Squelch) & RF LED Display

The U-81 OCTAVO has a preset mute (Squelch) internally for each channel for

maximum range and performance. There is no need to adjust this. In normal condition,

the RF LEDs indicator (7) should be lit when a correct frequency is received from a

transmitter. However, when the RF LEDs indicator (7) is extinguished, 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. AF LED Display

The U-81 OCTAVO receiver is equipped with an AF LEDs indicator (8). The AF LED

indicator lights whenever an audio signal is being received from a modulated transmitter

signal. The AF LED indicator is not a peak level indicator so it can light continuously

during audio signal input to the transmitter.

6. Connecting Audio Outputs

(Using the UH-81 handheld or UB-81 bodypack transmitters)

• For microphone use, the xed Balanced XLR out (9) or the adjustable 1⁄4” MIX

out (10) can be used. The U-81 OCTAVO audio output stage of each channel is

congured for XLR balanced microphone level when loaded by a 600 ohm balanced or

unbalanced mixer input. Make sure the Phantom Power on your mixing board in turned

off and the volume in turn down when making the audio connections. Start the receiver

VOLUME at minimum and adjust until the level is optimal.

• For each channel you wish to use, insert an audio cord with a XLR female plug into its

Balanced XLR out (9) jack on the back of the receiver. Plug the other end of this cord

into your amplier, effects or mixing board. The individual receiver outputs are all xed

mic level.

• The U-81 OCTAVO also has a MIX unbalanced output (10), which is a SUM line

level output of all the channels. To use it, just plug an audio cable with a 1⁄4” mono

plug into the MIX out (10) and plug the other end to your amplier or mixing board.

The front panel individual receiver volume controls (6) can be used to adjust any

channels level on the MIX out (10). Turn the volume controls on each of the channels

being used clockwise to near full gain. Adjust each volume up or down so that no

audio distortion is present when the ampier or mixer is set at their usual levels.

(Note: Turn the volume controls of any unused channel all the way off, full counter-

clockwise, so that only the channels being used are in the MIX output.)

• Your U-81 OCTAVO is now operational and ready to use. Now that you have completed

the above step, proceed to instructions for the UH-81 or UB-81 transmitters included

with your system.

Note:

• To prevent possible undesired noise during use, keep the volume controls of unused

channels (corresponding transmitter off) turned off in the amplier or the mixer.

The audio should only be “live” if the transmitter is on.

• As when making any connection, make sure the amplier or mixing board volume

is at the minimum level before plugging in the receiver to avoid possible sound

system damage.

• Only one transmitter can be used with one receiver. It is not possible to use two

transmitters on the same frequency and mix the output of these transmitters into

one wireless receiver.

U-81 OCTAVO RECEIVER OPERATING INSTRUCTIONS

5 8 1

4 7

9 2c3

2d2d

7. UH-81 Transmitter Set Up

• Release the Battery cover (11) by pressing the locking tab and slide down as

per arrow, exposing the Battery holder (12). 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.

• Turn on the UH-81 by sliding the ON/STDBY/OFF switch (13) to the STANDBY

position rst (transmitter on, audio muted) or the ON position (transmitter and audio

both on). The Battery indicator LED (14) will give a single quick ash, 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 microphone is now ready to use. The RF Signal LED (7) on the corresponding

channel of the U-81 OCTAVO receiver should now be lit, indicating a received signal

from the same frequency transmitter. When ready to speak, slide the ON/STDBY/OFF

switch (13) to the ON position.

• Adjust the volume of the receiver as per the Connecting Audio Outputs, section 6 of

the U-81 OCTAVO receiver instructions above.

[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.

Omni-directional mics pick up sound equally from all directions, and are prone to

feedback if not used carefully. Unidirectional mics, as provided with the UH-81, 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].

UH-81 HANDHELD MIC TRANSMITTER

11 12

UB-81 BODYPACK MIC TRANSMITTER

8. UB-81 Transmitter Set Up

• Install by battery for the UB-81 transmitter by snap-opening the Battery door (15)

and inserting a fresh 9V alkaline or NiMH battery into the Battery compartment

(16), 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.

• Selecting Audio Input Operating Mode of the UB-81. The UB-81 is equipped with two

Input selector switches (17) located under the cover on the circuit board for selecting

the type of audio input you will be supplyin g to the transmitter. Select from the choice

of two positions: HEADWORN MIC and LAVALIER MIC (Condenser Microphones).

• There are two switches with selectable positions HM, LT together at same time.

To select inputs: (see chart on page 9)

A. Headworn Mic — set both switches to “HM”

B. Lavalier Mic — set both switches to “LT”

(Note: Use only the input audio source as per the input selected with the internal

Audio input selector switches (17) or the audio will not be optimal–a muddy or

distorted sound may result. Do not select the GT setting as the U-81 receiver outputs

are not suitable for wireless instrument use.)

• Connection for the selected input to the UB-81 is provided with a 3.5 mm Locking jack

(18) for connecting the audio input selected. Connect either the Instrument cord (19)

or the Headworn mic (20) or Lavalier mic cord (21) 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 (22) it on to your clothes or instrument strap (if using the UB-81 as an instrument

transmitter).

• Turn on the UB-81 by sliding the ON/STDBY/OFF switch (23) to the STANDBY

position (transmitter on, audio muted) or the ON position (transmitter and audio both

on). The Battery indicator LED (24) will give a single quick ash, 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.

• The U-81 transmitter is now ready to use. The RF Signal LED (7) on the

corresponding channel of the U-81 OCTAVO receiver should now be lit, indicating a

received signal from the same frequency transmitter.

UB-81 BODYPACK MIC TRANSMITTER

• Adjust the volume of the receiver as per the Connecting Audio Outputs, section 6 of

the U-81 OCTAVO receiver instructions above. [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. Omni directional 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].

9. Microphone Use (with either a lavalier or headworn mic)

• Secure the connection from the Lavalier (21) or Headworn mic cord (20) 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

ON/STDBY/OFF switch (23) to either the “STDBY or ON” position.

• For optimum performance, an Input level control (25) is provided. Adjust the gain by

turning the control with a small screwdriver. 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 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.)

UB-81 BODYPACK MIC TRANSMITTER

19 20 21

CAUTIONS AND TROUBLESHOOTING

10. No Audio

If you are not getting audio through the U-81 OCTAVO system, slide the transmitter

POWER or MUTE (STDBY) switch to ON, carefully check all connection and system

setup. Check or replace transmitter battery. Check that the receiver is powered.

The receiver and transmitter must be set to operate on the same RF channel.

11. Audio Distorted or Unwanted Sound

Remove or turn off nearby RF sources (such as other wireless system, CB radio,

CD player, computer, digital effect, ect...) Check or replace transmitter battery.

12. Feedback

Observe care in selecting P.A. volume, transmitter location and speaker placement so

that the 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 direction, and are prone to feedback if not used carefully.

Unidirectional mics are more resistant to feedback. However, pick up sound source

best that are directly in front of the mic. In addition, mics that are farther from the sound

source, such as lavalier, required more acoustic gain and thus are also more prone to

feed back than close-source mics such as handheld or headworn models that are used

close to the mouth.

13. RF Interference

If you encounter receiving interference (from other than an operating TV station),

often it can be checked by turning off each transmitter at a time to nd the source of

causing interferences. Please note that wireless frequencies are shared with other radio

services. According to FCC regulations, wireless microphone operations are unprotected

from interference from other licensed operations in the band. If any interference is

received by any Government or non-government operation, the wireless microphone

must be cease operation or change frequencies. The above statement is valid only for

use in the U.S.A.

14. Signal Loss

Reposition the receiver and perform walk-thought test. If audio dropouts persist, locate

“dead” spots and avoid them during performance. Check receiver MUTE level setting.

Check or replace transmitter battery.

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