VoiceLift Pro Microphones User Guide • VoiceLift System Installation
25
Step 5 — Set up the Microphones and Test the System
1.
Set up each microphone in the VoiceLift system (see
on
page 13).
2.
Set the microphone gain:
a.
Power on the VoiceLift system. The Power LEDs on the microphone and receiver light
green.
b.
Instructor
: Place the lanyard with the pendant microphone around your neck and
adjust the lanyard as shown in step 4 on page 13.
Student:
Hold the VLH handheld microphone approximately 4 inches (10.2 cm) from
your mouth. Turn off all program audio sources.
c.
On the VLP microphone
, raise the volume to maximum by pressing and holding
the Volume button. A double beep tone indicates that maximum volume has been
reached. There are five volume steps available.
d.
On the PoleVault switcher
,
while testing the microphone,
press the VoiceLift adjust
buttons to increase or
decrease the microphone
input gain. Adjust the input
gain level until an acceptable
maximum level is reached.
The Signal and Normal LEDs
(see image at right) are lit
when speaking in a normal voice.
If there is feedback, lower the VoiceLift input gain on the switcher until feedback stops.
e.
Walk around the room while talking into the microphone. If feedback occurs, lower the
VoiceLift input gain on the switcher and then walk around the room again, talking into
the microphone.
NOTE:
The highest gain achieved without feedback is the maximum gain for the
VoiceLift system.
f.
On the microphone
, lower the volume to an appropriate level:
•
The level of your speaking voice should be enhanced, but not loud enough to sound
like a paging system.
•
Check the LEDs on the PVS switcher. The green Normal LED should light when you
speak, with the red Peak LED blinking occasionally.
PEAK
NORMAL
SIGNAL
Signal threshold
-20 dBV (-18 dBu)
Level has been
properly adjusted.
Level set too high.
Lower input gain.
NOTE:
The microphone audio should be slightly audible to the person speaking
into it. Have another person listen for the audio levels and check for sound
quality.
3.
Test any optional devices that have been installed.
PVS 407D
POLEVAULT SWITCHER
AUDIO LEVEL ADJUST
PEAK
NORMAL
SIGNAL
PEAK
NORMAL
SIGNAL
VOICELIFT
PAGING
SENSOR
INPUT
Press the VoiceLift buttons
to raise or lower the gain
Summary of Contents for VoiceLift Pro VLS 3001
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