Beyerdynamic Opus 100 - Manual (Page 8)

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4.2 Before the Soundcheck
1. Make sure that the transmitter and receiver are on the same frequency (refer to type
plate).
2. Check the transmitter battery and replace or recharge it if necessary. Use fresh alkaline
batteries only.
3. Check the performance area for dropouts (i.e. areas where poor reception is encountered).
If you find any dropouts try to eliminate them by repositioning the antennae or the receiver.
4. Adjust the sensitivity of the receiver and beltpack transmitter correctly to avoid distortions.
5. Try and avoid feedback, especially when you use omnidirectional microphones (e.g. MCE 50).
4.3 What to do about Feedback
Feedback is caused when the microphone is too close to a loudspeaker.
We recommend:
• Reduce the volume of the sound system.
• Move away from the loudspeaker.
• Turn the microphone away from the loudspeaker.
• Use a microphone with a cardioid, hypercardioid or supercardioid polar pattern.
Caution:
Feedback can also be caused if the sensitivity has been adjusted too high. In this case the
transmitter is no longer working in the linear range, but in the limiter range. Therefore, if the
level of the input sound drops, the gain is increased and feedback can occur. Turning down the
input sensitivity of the transmitter to the correct position will prevent this from happening.
5. Trouble Shooting
5.1 NE 100 Diversity Receiver
• Power supply is interrupted. Power supply
unit is not connected to the mains and/or
to the receiver
• Connect the power supply unit to the
mains and/or to the receiver
• Switch on the transmitter
• Make sure that the transmitter and
receiver are on the same frequency
• Position the receiving antennae
correctly
• Input amplifier of the connected mixer is
overloaded
• Input sensitivity is too high (TS 100 only)
• Use the reduction of the mixer or
adjust the volume (5)
• Reduce sensitivity
Distorted sound
No reception
No function
Problem Possible Cause Solution
• Transmitter is not switched on
• Transmitter works on a different
frequency
• Receiving antennae are not positioned
correctly