ASL INTERCOM PS 630, Руководство пользователя

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PAGE 5
User Manual PS 630 / October 2013 © ASL Intercom
BV
8 SPEAKER ATTENUATOR trimmer
With this trimmer one adjusts the extent to which
the loudspeaker is automatically dimmed if 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.
9 BUZZER VOLUME trimmer
To adjust the volume of the internal buzzer.
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) is
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
headset. The headset must have a can
impedance of minimum 200
Ω. If the headset has
2 cans in parallel, each can must have an
impedance of minimum 400
Ω. The headset
microphone may be of the dynamic or electret
type.
Pin assignments :
Pin 1: Shield mic. (GND)
Pin 2: mic. +
Pin 3:
Pin 4: phones -
If a headset is connected, loudspeaker and
gooseneck microphone are disabled automatically
The PS 630 may optionally be equipped with a
XLR-6 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 an electret noise cancelling microphone.
A limiter prevents the mic pre-amp from clipping
when speaking close into the microphone.
12 LOUDSPEAKER
A high quality
16 Ω loudspeaker