User manual

PAGE 5
User Manual PS 630 / Issue 2011 © ASL Intercom BV
.
8 SPEAKER ATTENUATOR trimmer
This trimmer adjusts the extent to which the
loudspeaker is automatically dimmed when the
gooseneck microphone is switched on. It prevents
unit feedback if side tone rejection is not sufficient.
It also minimizes system feedback or a 'hollow' sound
when the gooseneck mics of other speaker stations
are switched on.
Adjustment procedure :
switch off the TALK buttons
inject an audio signal into one of the
channels
turn up the listen volume of the selected
channel
activate the microphone (push the TALK
button)
adjust the degree of attenuation.
The speaker attenuator has no effect when a headset
is connected
9 BUZZER VOLUME trimmer
This trimmer adjusts the volume of the internal
buzzer, which is located behind the front panel.The
buzzer is activated if the CALL button of the PS 630
(or a CALL button of any other station on the
channels to which the PS 630 is connected) pushed
for longer than 2 seconds.
The buzzer may be muted after a so-called All Buzzer
Mute signal has been received from a PRO Series
master station or separate power supply.
10 HEADSET connector
An XLR-4 connector for the connection of a local
headset when private conversation is desired.
The headset must have a can impedance of
minimum 200 ohms. When the headset has two cans
in parallel, each can must have an impedance of
minimum 400 ohms. The headset microphone may
be of the dynamic or electret type.
Pin assignments :
Pin 1: Shield mic. (GND)
Pin 2: mic. +
Pin 3: phones +
Pin 4: phones -
When connecting a headset, loudspeaker and
gooseneck microphone are disabled automatically
The PS 630 can optionally be equipped with a XLR-5
headset connector for binaural use. Jumpers on the
internal front PCB (see #16) determine the routing of
each channel to the headset cans: either to the left
can, or the right can or to both cans or to none of the
cans.
11 GOOSENECK microphone
This is a high quality electret noise cancelling
microphone. A limiter prevents the mic pre-amp from
clipping when speaking close in the microphone.
12 LOUDSPEAKER
This is a high quality loudspeaker driven by a 2.9
Watt amplifier..
6.0 REAR PANEL CONTROLS & CONNECTOR
13 LINE connectors (A thru F)
These twelve XLR-3 connectors are for connecting
the PS 630 to the party lines of the intercom system.
Each channel has an XLR-3 female connector (input)
and an XLR-3 male connector (link).
14 PROGRAM AUDIO INPUT connector
This input is electronically balanced and accepts line
level signals. In case of binaural use of the PS 630, 2
internal jumpers (see #18) determine the routing of
the PGM signal to the headset.
15 DIRECT MIC OUT connector
This connector outputs the pre-amplified microphone
signal, electronically balanced. For output signal
levels see section 8 ‘Technical Specifications’.