A wireless microphone system broadcasts the audio signal that enters the transmitter from the wireless microphone on a radio frequency. This signal is picked up by the receiver unit and amplified by an audio amplification system (commonly called a PA, or "Public Address," system). The wireless microphone transmitter may be built into the wireless microphone unit or may be a separate unit that hangs on the user's belt. Either type of transmitter can be adjusted while the microphone is in use to set the audio output signal level, which is called the "gain."
Instructions
1. Locate the gain knob or screw. The gain knob will be labeled "Gain" or "Level" and will have a set of marks around the knob indicating the gain level. If the gain control is a slotted screw, it will be located on the opposite side of the microphone from the power switch.
2. Turn the gain knob clockwise to increase the audio signal level. This direction typically will be labeled "HI" on the gain level markings. If the gain control is a screw, insert the tip of the flat-head screwdriver into the screw hole. Twist it clockwise to increase the gain.
3. Turn the gain knob counterclockwise to decrease the audio signal level. This direction typically is labeled "LO" on the gain level markings. If the gain control is a screw, insert the tip of the flat-head screwdriver into the screw hole. Twist it counterclockwise to decrease the gain.
4. Test the microphone by speaking into it at a performance level. Increase or decrease the gain level until the audio signal is clear without distorting. Use the volume level on the amplifier to adjust the volume coming out of the speakers.
Tags: audio signal, gain knob, wireless microphone, gain control, gain level, signal level, audio signal level