Extron electronic VLM 2000 - Manual (Page 8)

VoiceLift ™ Microphone • Introduction 1-2
Introduction
PRELIMINAR
Y
About this Manual
This manual discusses the components and operation of the Extron VoiceLift ™
Microphone. For details on installation procedures, refer to the VoiceLift Microphone
Installation Guide , part #68-1629-01.
The following terminology is used in this manual:
• VoiceLift Microphone refers to the entire system, which includes the pendant
microphone, the receiver, the charging station, and any secondary receiver(s).
• Pendant microphone refers to the VLP 102 microphone unit only.
• Receiver refers to the VLR 102 infrared (IR) receiver, which mounts onto a wall or
ceiling.
• Secondary receiver refers to the optional additional receiver (VLR 102 SR), which
can be installed to expand coverage in a large or odd-shaped room.
• Charging station refers to the VLC 102 charger unit for the pendant microphone.
About the VoiceLift Microphone
The VoiceLift Microphone is a low-power classroom amplification system that
ensures that a teacher can be clearly heard at a comfortable level throughout the
entire room (also referred to as a soundfield system). The pendant microphone,
worn by the teacher/speaker, picks up speech and transmits it via IR signal to the
receiver. From the receiver, the signal is fed to an Extron PoleVault ® switcher/
amplifier, which powers strategically placed speakers to improve the signal-to-
noise ratio of the teacher’s voice to at least +15 dB.
Components
The VoiceLift Microphone consists of the following components:
• Pendant microphone (VLP 102) — The pendant microphone is worn by the
teacher, either on a lanyard around the neck or clipped to clothing. It features
volume control, a power on/off switch, an auxiliary input to support an
optional boom or lapel microphone, and an auxiliary line input connector to
feed in a source such as an MP3 player.
Pendant microphones can also be hand-held for use by students, if desired.
• Receiver (VLR 102) — The receiver is the main sensor for the VoiceLift
Microphone. It features captive screw connectors for auxiliary input, RS-232,
contact input, and relay output; RJ 45 connectors for power, communication
with the PoleVault switcher/amplifier, and audio output; and two DIP
switches that control the volume change tone and the output pin mode.
• Secondary receiver (VLR 102 SR) — The optional secondary receiver extends the
signal to cover large or odd-shaped rooms. It contains RJ-45 connectors for
cables to the main IR receiver and to the PoleVault switcher/amplifier. Up to
four secondary receivers can be used with a VoiceLift Microphone.
• Charging station — The optional microphone charging station contains slots in
which one or two pendant microphones can be placed for their batteries to be
recharged. The charging station is powered by an external power supply.
C Do not charge alkaline or NiCd batteries.