• No sound. Make sure both the transmitter and the receiver are on the same wave length in order for them to be able to pick each other up. Check the 'sound chain':
  • Is the level meter on the transmitter flickering when you speak into the mic? If not, check that it is turned on and not on mute and that the mic is properly connected.
  • Is the level meter on the receiver flickering? If not, check radio reception.
  • Is the level meter on the recorder flickering? If not, check the cables are connected properly.
  • All of these are working, but you do not hear anything? Check the volume control for the headphones.
• Strange sounds / other people speaking.
  • Do this test: try turning the transmitter off, if the green light on the receiver stays on and the black bar showing the radio reception is still full, someone nearby may be using the same frequency.
  • If the wave length is already used (e.g. if you can hear other sounds, or the "radio reception bar" does not fall to zero when you turn of the transmitter), you need to change the frequency (on both transmitter and receiver). You must never have two microphones transmitting on the same frequency. (Two receivers receiving signals from the same microphone is, however, fine.)

Mobile phones on the person connected to the mic must be turned off otherwise they will interfere.