Adjusting Audio Levels - Shure Computer Headset User Manual

SYSTEM OPERATION
ESTABLISHING A WIRELESS LINK
When turned on, the transmitter generates a radio frequency (rf) carrier sig-
nal that transmits steadily, regardless of whether or not you are using the mi-
crophone. When the receiver detects this signal, the yellow rf light on the re-
ceiver illuminates, indicating that it recognizes the presence of the transmitter.
In the following steps you will use the transmitter's carrier signal and the re-
ceiver's rf light to test whether or not your setup and environment allows the
transmitter and receiver to establish a link.
1. Plug in the receiver so that the green power light illuminates.
2. While wearing the transmitter, stand back from the receiver, but close
enough so that you can see the LEDs.
3. Turn the the transmitter power switch on and off. As you do so, the yellow
rf light on the receiver should also turn on and off.
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If the the yellow light does not go on, this indicates that
the receiver is not picking up the transmitter's carrier
signal. See the troubleshooting section in this guide.
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If the yellow light stays on when you turn the transmit-
ter off, this indicates that the receiver is picking up
some other rf signal. Computers, monitors, or other
electronic equipment can give off rf interference. Try
relocating the receiver so that the yellow rf light goes
off when the transmitter is off. If the source of interfer-
ence cannot be eliminated, you may need a wireless
system that operates at a different frequency. Contact
your Shure dealer.

ADJUSTING AUDIO LEVELS

Proper adjustment of system audio levels helps deliver a strong audio signal
without distortion. Use the following steps:
1. Power on the transmitter and set the transmitter audio mute/on switch to
ON.
2. While wearing the headset, talk normally and observe the red peak light
on the receiver. It may flicker occasionally. If the peak light remains on as
you talk, try positioning the microphone more to the side of your mouth.
3. Activate the computer sound software so that you can view the incoming
sound level. Most software has some type of meter or indicator that allows
you to do so. You can also use the Windows Sound Recorder applet.
4. Talk at a moderate level as you observe the sound level in the software.
Adjust the receiver's volume control and the software's audio input control
so that the loudest sounds do not exceed the maximum level. Windows
Sound Recorder displays a waveform. Make sure the top of the waveform
is not being clipped flat.
5. If the software does not respond, check the following:
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The transmitter should be on and the receiver rf light-
should be illuminated.
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The audio mute/on switch on the transmitter should be
set to the ON position.
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The receiver volume control should be turned up.
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The receiver audio output should be plugged into the
MIC input on the computer or sound card (NOT the
LINE IN input).
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In the computer audio software, the microphone (MIC)
should be selected as the input (or recording) device
and the input level control turned up.
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Make sure the software and sound card are properly
installed.
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The transmitter audio gain control should be fully ro-
tated clockwise (refer to the Transmitter Audio Gain
Adjustment section of this guide).
TESTING SOUND QUALITY
1. Prepare your computer audio software so that you can record sound from
your sound card.
2. Record yourself talking normally for 15 seconds or so.
3. Review the recording and check for the following:
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A distorted or fuzzy sound probably means that the
sound level is too high. Reduce the receiver audio out-
put volume and/or software audio input levels slightly.
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If your voice sounds weak or distant, increase audio
levels.
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If there is excessive background noise, try positioning
the microphone closer to your mouth and adjusting the
audio levels down a bit. Be sure that the microphone
metal grill is facing towards the mouth.
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If breath noise or "popping" can be heard, either posi-
tion the microphone more to the side of the mouth or
install the supplied windscreen over the microphone
element.
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