User guide

VoiceLift System with PVS 405D • Features and Operation 6
LR
DO NOT
GROUND
OR SHORT
SPEAKER
OUTPUTS
4/8
Ω
3A MAX
POWER
12V
HDMI
1/2
SIG LINK SIG LINK
3/4
INPUTS OUTPUT AUDIO OUT
PVS 405D
AMPLIFIED AUDIO OUT
PAGING
SENSOR
PVT IN PVT IN
L
R
AUX OVER PVT REMOTE
VOICELIFT
LAN 1LAN 2LAN 3
INPUT 5
+V
L
R
RS-232
Tx Rx
IR
SG G
O N
12
CTS-2
MIX TONE
RS-232
AUX IN
CTC
+
RLY
Tx
IN
Rx
C
NO
OUTIN
PoleVault Switcher
VLR 102
Receiver
MLC
Controller
Connection
VLP 202
Pendant
Microphone
or
VLH 102
Handheld
Microphone
1
2
3
To Speakers
Figure 3. VoiceLift System Connections and Audio Signal Path
a Microphone — The VLP 202 Pendant Microphone or the VLH 102 Handheld
Microphone picks up speech from the instructor and transmits a mono audio signal
via infrared (IR) on the selected channel (2.3 MHz or 2.8 MHz).
b Receiver — The VLR 102 receiver picks up the IR signal from the microphone. The
receiver outputs a balanced -10 dBV line level signal via an RJ-45 connector. The
signal passes to the PoleVault switcher through a shielded twisted pair (STP) cable.
c PoleVault switcher — The PoleVault switcher also functions as an amplifier for the
VoiceLift System. It receives the audio signal from the VLR 102 receiver, amplifies it,
and sends it to strategically placed speakers. The switcher powers speakers placed
throughout the room to improve the signal-to-noise ratio of the voice of the speaker
to at least +15 dB.
FIG_Audio signal path