CHIAYO NDR-3120 UHF 1-2 19 Inch Dual-Channel Auto Sync Diversity Receiver User Manual
- June 3, 2024
- CHIAYO
Table of Contents
NDR-3120 UHF 1-2 19 Inch Dual-Channel Auto Sync Diversity Receiver
User Manual
CHIAYO
ELECTRONICS CO., LTD.
Thank you for choosing this wireless microphone system! 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.
In the box
Important
- Please make sure that the output DC voltage range of the switching power covers that specified by the receiver before turning it on.
- The RF indicator will glow to denote RF signal received after turning on the transmitter.
- The receiver and transmitter must be the same frequency.
- While using the transmitter, the audio signal indicator will glow to denote audio signal received.
Parts and functions
Function settings on NDR-3120
Adjusting VOLUME level
Volume level can be adjusted by rotating the Power/volume knob.
Scanning & Changing CHANNEL
First turn on main power switch, the two 7-segment display LED will show last
stored frequency.
For example, if channel 88 is 630.325MHz, the LED will first display 63, 03
and 25 in sequence and return to 88 . Select a channel that corresponds to the
transmitter. When transmitter is turned on, either A or B diversity indicator
will light up to indicate that it is connected. For an interference- free
operation, a cleaner channel might be necessary if the current one receives
too much interference. Before scanning, the transmitter must be switched off.
Press ▲or▼and the receiver will scan and stop at the next clean channel.
CHANNEL SYNCHRONIZING of the receiver and transmitter Align infrared areas
of the receiver and transmitter within 10~30cm. 
Changing the receiver’s channel
Press the sync button on the receiver. The receiver will transmit the
frequency to the transmitter and synchronize the channel.
If it doesn’t work check that you have the IR sensor panels aligned, that they
are facing each other, devices are within 30cm of each other, and try
again.Adjusting SQUELCH level
When interference is encountered try reducing the sensitivity of the receiver
by turning the SQ control clockwise, thus less susceptible to interference. If
this still does not solve the problem it means this frequency is not
suitable. Adjust the squelch back to where it was and use the scan function to
locate a clear channel. 
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” or “MIC IN” jack of the mixer/ amplifier.
Level switch setting: When connecting to the LINE /AUX IN of a mixer/amplifier, switch to “LINE” position. DO NOT use the “MIC” position as they may not deliver a sufficient high output level. When connecting to the “MIC IN” jack of a mixer/amplifier, switch to “MIC” position. Overload distortion may occur at the wrong level position.
-
Mixed audio output
Either Balanced or unbalanced output socket of CHANNEL B generates mixed output of both channels. The balanced output socket (XLR) must connect to the balanced input socket of the mixer. The unbalanced output socket (¼ ”) must connect to the unbalanced input socket.
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
The slide rail structure on both sides of the receiver is designed to facilitate the user to connect the two receivers in parallel and quickly install onto the cabinet.
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 12I1397
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