User Manual for Chord NU1 Dual UHF Wireless System

Quick Guide

The Chord NU1 is a professional UHF wireless microphone system designed for freedom of movement. This guide covers the setup and operation of the receiver and transmitter units. Ensure you read the safety warnings regarding moisture and power supply before use.

Safety and Placement

• Keep all components away from direct sunlight, heat sources, damp, or dusty environments.
• Do not place heavy objects on top of the receiver or transmitters.
• Ensure the correct power adapter (350mA minimum) is used with the correct mains voltage.
• Use alkaline or NiMH batteries in the transmitters and remove them if the system is not used for long periods.
• Avoid dropping the microphone to prevent capsule failure.

Receiver and Transmitter Overview

The receiver features an RF carrier signal indicator, AF audio signal indicator, volume control, and power switch on the front panel. The rear panel includes the BNC antenna connector, balanced XLRM output, unbalanced 6.3mm jack output, and DC power input.

The transmitters (handheld or bodypack) feature an on/off switch, battery compartment, and antenna. Bodypack transmitters also include a 3.5mm threaded jack socket for the microphone input.

Setting Up

1. Batteries: Insert fresh AA batteries into the transmitter, ensuring correct polarity.
2. Receiver Placement: Position the receiver within line of sight of the transmitter.
3. Power: Connect the supplied power adapter to the receiver and the mains outlet.
4. Antenna: Connect the aerial to the BNC connector on the rear panel.
5. Audio Connection: Connect the receiver to your mixer or amplifier using either the balanced XLR or unbalanced 6.3mm jack output. Turn down the volume on your audio equipment before connecting.

Operation

Switch on the receiver. Move the transmitter switch to the ON position. Gradually increase the microphone level on the receiver, then adjust the volume on your mixer or amplifier until the sound is audible. After use, switch the transmitter to OFF to mute and deactivate the signal, then power down the receiver.

Troubleshooting

If the system is not working, check the following:

• Power LED does not light: Ensure the power adapter is connected and the receiver is switched on.
• Power LED is lit but no RF/AF: Ensure the transmitter is switched on, within range, and has charged batteries.
• No sound: Check that the receiver is connected to the mixer/amplifier and that volume levels are turned up.
• Distorted output: Turn down the volume on the receiver or reduce gain on the mixer/amplifier.

Specifications

The system operates at 863.1MHz or 864.1MHz depending on the model. It features a signal-to-noise ratio of >105dB, a maximum range of 60m, and a THD of <0.5% at 1kHz. The receiver requires a 12-18Vdc 350mA power supply.