CHIAYO NDR-2120 VHF 1-2 19 Inch Dual-Channel Auto Sync Diversity Receiver User Manual
- June 3, 2024
- CHIAYO
Table of Contents
Operation manual
NDR-2120
VHF 1/2 19″ Dual-Channel Auto Sync
Diversity Receiver 
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
** Remark: The above specifications are subject to change without prior notice.
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
Adjusting volume level
Both channel’s volume level can be adjusted separately by rotating its
designated volume knob.
Scanning & changing channel
First turn on main power switch, the 7-segment channel indicator will display
current channel number.
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.
1. Hold ▲ button until the channel indicator flashes to denote readiness for
setting.| 2. Press ▲ button and the receiver will scan and stop at the next
clean channel. The setting will be saved automatically.
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Channel synchronizing of the receiver and transmitter
Align infrared areas of the receiver and transmitter within 10~30cm. 
Changing the transmitter’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 10~30cm 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
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 / AUX IN” or “MIC IN” jack of the mixer/ amplifier.
STEP 1: MIC-LINE output level switch
| 1. When connecting to the LINE / AUX IN of a mixer/amplifier, switch to
“LINE” position (fig.1 & 2). 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 “MIC”
position (fig.3 & 4). Overload distortion may occur at the wrong level
position.
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STEP 2: MIXED-SEPARATE output mode switch
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1. When CHANNEL A’s audio is delivered with CHANNEL B from OUTPUT B, slide
the OUTPUT MODE to MIXED. (fig.2 & 4)
2. When CHANNEL A & B’s audio is delivered from OUTPUT A & B, slide to
SEPARATE. (fig.1 & 3) ※Under SEPARATE mode, OUTPUT B will only deliver CHANNEL
B’ audio instead of both channels’.
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Receiver placement
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:
[email protected]
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 
http://www.chiayo.com.tw