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ASL INTERCOM PS 630 ユーザーマニュアル
rejection in the high frequency range. It
compensates the capacity of the interconnecting
cables. It prevents the speaker from feeding back
into the gooseneck microphone (unit feedback).
4.0
FRONT PANEL CONTROLS & CONNECTOR
8 SPEAKER ATTENUATOR trimmer
This trimmer allows you to dim the speaker
automatically, when the gooseneck microphone
is switched on. It prevents:
-
unit feedback if sidetone rejection is not
sufficient.
-
system feedback or a 'hollow' sound when the
gooseneck microphones of other speaker
stations on the same channel are activated
simultaneously.
Adjustment procedure :
-
switch off TALK buttons.
-
inject an audio signal on the selected
intercom channel.
-
turn up volume.
-
activate microphone and adjust the desired
amount of attenuation.
The speaker attenuator has no effect when a
headset is used.
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 you press the CALL
button of the PS 630 or a CALL button of any
other station (on the channel to which the PS 630
is connected), longer than 2 seconds and the
buzzers are not muted (on the master station or
power supply).
10 HEADSET connector
A XLR-4 type connector for the connection of a
local headset when private conversation is
desired. These must have a can impedance of
200 ohms (or greater), or each minimum 400 ohm
when in parallel.
The headset microphone may be of the dynamic
or electret type
Pin assignments :
1. Shield mic. (GND)
2. mic. +
3. phones +
4. phones -
When connecting a headset, speaker and
gooseneck microphone will be disabled
automatically.
The PS 630 can optionally be equiped with a XLR-
6 headset connector for binaural use.
Jumpers on the front PCB board inside determine
the destination of the listen signals on the
headset.
Each listen signal of the six channels can
independantly be placed:
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
continued
-
on the left or right can.
10 HEADSET connector
A XLR-4 type connector for the connection of a
local headset when private conversation is
desired. These must have a can impedance of
200 ohms (or greater), or each minimum 400
ohmd when in parallel.
The headset microphone may be of the dynamic
or electret type
Pin assignments :
1. Shield mic. (GND)
2. mic. +
3. phones +
4. phones -
When connecting a headset, speaker and
gooseneck microphone will be disabled
automatically.
The PS 630 can optionally be equiped with a XLR-
6 headset connector for binaural use.
Jumpers on the front PCB board inside determine
the destination of the listen signals on the
headset.
Each listen signal of the six channels can
independantly be placed:
-
on the left or right can.
-
on both cans.
11 GOOSENECK MICROPHONE
A high quality electret noise canceling
microphone.
A limiter prevents the mic pre-amp from clipping
when speaking close in the microphone. The
microphone is automatically disabled when a
headset is used.
12 LOUDSPEAKER
A high quality loudspeaker driven by a 1.3 Watt
amplifier.
The speaker is automatically disabled when a
headset is used.
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