User manual

PAGE 3
User Manual PS 430 / October 2013 © ASL Intercom BV
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1.0 GENERAL DESCRIPTION
The PS 430 is a four channel speaker station
designed for use in an ASL intercom system and
provides full duplex communications.
It incorporates a loudspeaker, a gooseneck
microphone and a headset connector.
The PS 430 RM model has a small built-in electret
mic instead of a gooseneck mic.
Each channel has a Volume (listen level) control,
a Talk and Call button with LED indicators and a
two-stage side tone trimmer.
A master volume controls the total
speaker/headset volume.
The unit is equipped with a limiter for the
gooseneck microphone, allowing the user to
speak close into the microphone without giving
rise to overload and distortion. Loudspeaker
dimming is automatic if the gooseneck
microphone is active.
The XLR-4 headset connector allows connecting
a headset or telephone handset.
If a headset is connected, both gooseneck
microphone and speaker are disabled
automatically.
Special attention has been paid to the intelligibility
of speech. By applying low noise/high speed op-
amps, a speech presence filter and a specially
developed high power bridged headphone
amplifier, communication is very comfortable even
in environments with high background noise level.
The unique ASL CALL system provides both a
flashing red LED and a very distinctive sound
signal. Only a slight touch of the CALL button
makes the red LED flash, whilst holding the
button for two seconds will activate the CALL
sound signal. The volume of the sound signal
(buzzer) can be adjusted at the front panel.
Fully electronic switching allows for 'soft'
microphone ON switching (latched or momentary),
remote Mic Mute facility and automatic speaker
attenuation.
2.0 INSTALLATION
To connect the PS 430 to the intercom system,
use professional flexible microphone cable with 2
wires and 1 shield only. These cables may be
connected to the LINE connector sockets on the
PS 430 side panel, using the Y-cords which are
in the shipping carton.
The PS 430 is fully protected against wiring
mistakes (reverse power) or short circuit in the
interconnect cables.
A special kit is available for mounting the PS 430
in a 19" rack, taking 2U of rack space
3.0 FRONT PANEL CONTROLS & CONNECTOR