Panasonic WV-X4571L Important Information Manual page 24

Symptom
Audio input contains
noise.
Cause/solution
• Check the following.
• Grounding of the camera, a switching hub or
peripheral devices are not done.
• The camera is used near an electrical power line.
• The camera is used near a device which produces
strong magnetic field or radio waves (such as near
a TV/radio antenna, a motor of an air conditioning
system, a transformer, etc.)
When audio input still contains noise even after
checking the above possibilities, use a powered
microphone or connect audio output with low output
impedance.
24
Reference
pages
14