ViewSonic DLP PROJECTOR PJD7400W User Manual page 25

ensure a quality use of the wireless microphone, it is recommended that your
microphone conforms to the specifications listed in the table below.
Signal Parameter
Transducer Principle
Microphone Impedance
Frequency response
• There are two ways to adjust microphone volumes.
• Directly set microphone volume levels in the S S YSTEM SETUP: Advanced > A A udio
Settings > M M icrophone Volume menu.
• Set projector volume levels in the S S YSTEM SETUP: Advanced > A A udio Settings >
Volume menu, or press V V olume keys (+, -) on the remote control. (The projector
volume setting will affect the microphone volume.)
• To make the microphone input available when the projector is in standby mode, turn on
the SYSTEM SETUP: Basic > Standby Settings > Microphone menu.
• If the microphone is not working, check the volume setting and cable connection.
• You might get feedback noise from the microphone when you are too close to the
speaker of the projector. Move the microphone away from the speaker of the projector.
The greater volume you require, the greater distance you need to be away from the
speaker to prevent the noise.
Min Type
300
600
20
Max
Dynamic
1K ohm
16k Hz