Extron electronic VLM 2000 - Manual (Page 13)

2-3 VoiceLift ™ Microphone • Operation and Features
PRELIMINAR
Y
b
Receivers — The VLR 102 receiver and the optional VLR 102 secondary
receiver(s) pick up the IR signal from the microphone. If secondary receivers
are present, the VLR 102 processes the signal from them.
The receivers output a balanced -10 dBV line level signal via an RJ-45
connector. The signal is passed to the PoleVault switcher/amplifier through
an unshielded twisted pair (UTP) cable.
c
Adapter — The RJ-45 to captive screw VoiceLift Adapter passes the audio
signal from the VLR 102 receiver to the PoleVault switcher.
d
PoleVault switcher — The PoleVault switcher also functions as an amplifier
for the VoiceLift Microphone. It receives the audio signal from the VLR 102
receiver, amplifies it, and sends it to strategically placed loudspeakers to
improve the signal-to-noise ratio of the teacher’s voice to at least +15 dB.
Cable lengths
The following table shows the recommended minimum and maximum lengths of
cable between system components.
Cable connecting: Minimum Maximum
Receiver to PoleVault switcher 5' (1.5 m) 100' (30.4 m)
Receiver to Secondary Receiver, or
Secondary Receiver to Secondary Receiver
5' (1.5 m) 100' (30.4 m)
Total cable length — 300' (91.4 m)
Charging Station
The VLC 102 charging station recharges the VLP 102 pendant microphone’s battery.
It contains two slots, enabling two microphones to be charged simultaneously. The
charging station is powered by an external wall power supply (provided).
Wall charger
2 1
VLC 102 charging station
The VLC 102 charging station has the following connections:
a
Microphone slots — Insert one or two VLP 102 microphones into these slots
to charge their batteries. Each slot contains two charging contacts that mate
with the two charging contacts on the bottom panel of the microphone. When
two microphones are in the charging station, each is charged independently of
the other, and the two can finish charging at different times.