Chiayo NDR-3900 Owner's manual

Brand: Chiayo

Model: NDR-3900

Type: Owner's manual

Chiayo NDR-3900 is a dual-channel auto-sync diversity receiver designed for use with wireless microphones. It features two balanced audio outputs (XLR connectors), one unbalanced audio output (¼” PHONE PLUG connector), and a MIC/LINE output impedance switch. The receiver has a large LCD display that shows the channel, frequency, audio level, and squelch level. It also has a built-in IR sensor for easy synchronization with transmitters.

The NDR-3900 is a versatile receiver that can be used in a variety of applications, including live sound reinforcement, recording, and broadcasting. It is a great choice for users who need a reliable and affordable wireless microphone system.

CHIAYO ELECTRONICS CO., LTD.

Operation manual

NDR-3900

Dual-Channel Auto-Sync Diversity

Receiver

FRE Q SCA N

8 8 8 8 8 8

MHz

8 8 8CH

8 8 8 8 8 8

MHz

8 8 8CH

BA BA

AUD IO AUD IO

NDR-3900

DU AL C HANNEL DI VERSITY RECE IVER

VOLUME

POWER

VOLUME

MIN

MAX

MIN

MAX

NDR-3900

Dual-Channel Auto-Sync Diversity Receiver

Thank you for choosing this wireless microphone system!

Our products are designed to last and for user friendly operation. Each system consists of:

1. a receiver

2. two handheld or belt-pack transmitters

3. a pair of antennas

4. a switching adaptor

5. an operation manual

For more details, please take a few moments to read this operating manual to have a thorough

understanding of the function and operation of both transmitter and receiver.

Important

1. Please make sure that the output DC voltage range of the switching power covers that

specified by the receiver before turning it on.

2. The RF meter bars and antenna diversity indicator will appear to denote RF signal received

after turning on the transmitter.

3. The receiver and transmitter must be the same frequency.

4. While using the transmitter, the audio meter bars will appear to denote audio signal received.

antenna diversity indicator

audio meter bars

FREQ

6 5 0 0 0 0

MHz

00 1CH

AUDIO

Instructions

Parts and functions

Front panel

LCD display

Rear panel

FR EQ S CAN SQ FR EQ S CAN SQ

88 88 88

MHz

888

88 8 8 8 8

MHz

888

BA BA

AU DIO AU DIO

NDR-3900

DUAL CHANNEL DIVERSITY RECEIVER

VOLUME

POWER

VOLUME

MIN

MAX

MIN

MAX

Volume control (CH A)

IR sensor LED

Power control

Setting/Down button (CH B)

Channel sync button (CH B)

Channel sync button (CH A)

Menu/Up button (CH A)

Setting/Down button (CH A)

IR sensor LED

Volume control (CH B)

Menu/Up button (CH B)

Unbalanced audio output (mixed)

MIC/LINE

output impedance

switch, only for mixed

audio

output.

Balanced audio output (CH B)

Antenna B (TNC type)

Balanced audio output (CH A)

Antenna A (TNC type)

DC input

NDR-3900

Dual-Channel Auto-Sync Diversity Receiver

Changing CHANNEL / FREQUENCY

Press-release the menu/up button until

the frequency icon appears on the

bottom.

Hold setting/down button until this icon

flashes to denote readiness for

setting.

►

Press menu/up button or setting/down

button to select a new channel.

Press : forward, press : backward.

Hold : fast forward, hold : fast

backward.

As the channel changes, the frequency

changes accordingly, too.

After a channel is chosen, wait 5 seconds to

store the setting.

►

CHANNEL scanning

For an interference- free operation, a cleaner channel might be necessary if the current one

receives too much interference.

Press-release the menu/up button until

the scan icon appears on the bottom.

Hold setting/down button until this icon

flashes to denote readiness for

setting.

►

Press menu/up button or setting/down

button to find and locate a clear,

interference- free channel ( : forward, :

backward).

After a channel is chosen, wait 5 seconds to

store the setting.

►

FREQ

650000

MHz

00 1CH

AUDIO

FREQ

650000

MHz

00 1CH

AUDIO

FREQ

652000

MHz

009CH

AUDIO

SCAN

650000

MHz

00 1CH

AUDIO

SCAN

650000

MHz

00 1CH

AUDIO

SCAN

652000

MHz

009CH

AUDIO

Instructions

SQUELCH (SQ) setting

When interference is encountered try reducing the sensitivity of the receiver, thus less

susceptible to interference.

Press-release the menu/up button until

the squelch icon appears on the

bottom.

Hold setting/down button until this icon

flashes to denote readiness for

setting.

►

Press menu/up button or setting/down

button to select a new squelch level

between 1 and 10 ( : forward, :

backward).

After a level is chosen, wait 5 seconds to

store the setting.

►

Important: Since increasing the squelch level will also reduce the reception distance, it’s

recommended to choose the lowest level that can eliminate the interference.

If this still does not solve the problem it means this frequency is not suitable. Adjust the squelch

back to its preset level and use the scan function to locate a clear, interference-free channel.

CHANNEL SYNCHRONIZING between receiver and transmitter

Align infrared areas of the receiver and transmitter within 10~30cm.

Press the synchronizing button of the

receiver.

The receiver will transmit the frequency to

the transmitter and synchronize the

channels.

If it doesn’t work check that you have the IR sensor panels aligned, that they are facing each

other, devices are within 10~30cm of each other, and try again.

LE - - 0 2

AUDIO

LE - - 0 2

AUDIO

LE - - 0 6

AUDIO

FR EQ SC AN

8888 88

MHz

888CH

88888 8

MHz

888CH

BA BA

AU DIO AU DIO

NDR-3900

DUAL CHANNEL DIVERSITY RECEIVER

VOLUME

POWER

VOLUME

MIN

MAX

MIN

MAX

10~30cm

NDR-3900

Dual-Channel Auto-Sync Diversity Receiver

Audio output connection



Balanced output: XLR connector provides balanced audio output signal from this jack to the

mixer/amplifier.

Use an audio output cable with “XLR” or “Cannon” connector, connect one

end to the balanced output jack of the receiver, and the other end to the “MIC IN” jack of the

mixer/ amplifier.



Unbalanced output: ¼” PHONE PLUG connector provides unbalanced audio output

signal from this jack to the mixer/amplifier.

Use an audio output cable with ¼” PHONE

PLUG connectors. Connect one end from the unbalanced output jack of the receiver, and

the other end to the “LINE IN” jack of the mixer/ amplifier.

MIC/LINE output impedance level switch

1. When connecting to the LINE /AUX IN of a mixer/amplifier, switch to RIGHT “LINE”

position. DO NOT use the “MIC” position as they may not deliver a sufficient high output

level.

2. When connecting to the “MIC IN” jack of a mixer/amplifier, switch to LEFT “MIC” position.

Overload distortion may occur at the wrong level position.

MIC/LINE output level switch

►►



MIC level for connecting to MIC IN.



LINE level for connecting to LINE IN or AUX IN

Instructions

Receiver installation

For best operation, the receiver should be at least 1m above the ground and 1m away from a

wall or metal surface to minimize reflections. The transmitter should also be at least 1m away

from a wall or metal surface to minimize reflections. The transmitter should also be at least 1m

away from the receiver. Keep antennas away from noise source such as motors, automobiles,

neon light as well as large metal objects.

Rack mounting

NDR-3900 is an EIA standard 1U rack-mountable receiver base with metal chassis. It can be

cabinet-mounted with provided kits. Please refer to the following assembly illustration.

CHIAYO ELECTRONICS CO., LTD.

Http://www.chiayo.com.tw

｜

Email: sales@chiayo.com.tw

Office: 30, Lane 27, Section 4, Jen-Ai Road, Taipei 10685, Taiwan

Tel: 886-2-27415741

｜

Fax: 886-2-27525242

Factory: 88, Chung-Hsiao Street 2, Chiayi 60080, Taiwan

Tel: 886-5-2711000

｜

Fax: 886-5-5767611

Chiayo NDR-3900 Owner's manual

Chiayo NDR-3900 Owner's manual

Chiayo NDR-3900 Owner's manual

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