ASL INTERCOM PS 4379, User Manual

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6.0 FRONT PANEL CONTROLS & CONNECTOR continued
off. If that is not sufficient the next channel will switch off
- and so on. The circuit-breaker resets automatically 3
seconds after the cause of the overload has been
removed, and restores line power automatically.
The LED will also light up red for a few seconds every t
time mains power is switched on.
25 MIC MUTE (per channel)
With these pushbuttons the microphones of the
connected stations can be switched off for each channel
separately. Each user station can activate its micro-
phone again by pushing the TALK button.
26 BUZZER MUTE (per channel)
With these pushbuttons the buzzers of all stations
connected to that channel can be muted, until the
BUZZER MUTE button is switched off again.
27 IFB (per channel)
With these pushbuttons a channel can be put into IFB
Mode. This is used for monitoring purposes and one
way communication from i.e. a director or producer to a
talent. If a channel is put into IFB mode, the AUX button
of that channel will switch on automatically and the
auxiliary signal of the IFB auxiliary input will be routed to
that channel. If no IFB-Auxiliary is needed, it can be
switched off by switching off the aux button of that
channel. The AUX-input can also be routed to an IFB
channel by switching the corresponding dip switch (IFB
or AUX input for IFB) to 'on' (see section 8.0 Internal
controls / Dip switches).
The TALK button of an IFB channel will be momentary
and not latching and must be pressed while talking.
When pressing the TALK button of an IFB channel, the
aux volume will be dimmed automatically by 50 %. This
dim factor can be adjusted (see point 17 AUX Level /
IFB DIM).
The TALK buttons of the intercom channels will switch
off for as long as the IFB TALK button is pushed. This
can be changed by setting the corresponding internal dip
switch (IFB and TALK) to 'on' (see section 8.0 Internal
controls / Dip switches).
TO INCREASE LED LIGHT INTENSITY OF MIC MUTE,
BUZZER MUTE, AUX AND IFB see point 21 'Set up lock'.
22 SET UP LOCK
The setup of the AUX, IFB and Buzzer mutes can be
locked by pushing a small pin into the SETUP lock. It
will be unlocked by pushing it again. When pushing and
holding the set up lock, the light intensity of the LEDs of
the MIC MUTE-, BUZZER MUTE-, AUX- and IFB LEDs,
can be increased by turning the AUX level / IFB Dim
knob. In "Near Station" mode (see section 9.0 Modes)
one can adjust the dim factor per channel by pushing
and holding the set up lock as well as the TALK button
of the required channel and turning the AUX level / IFB
Dim knob. The dim factor will be shown on the Aux
level/ IFB dim LED bar.
23 SYSTEM LINK LEDs (per channel)
These LEDs illuminate if another ASL Intercom System
has been connected to the PS 4379 through the
"System Link" connector at the corresponding channel.
The Line Impedance is now provided by the other
Intercom system and the internal line impedance for
that channel is switched off. The Buzzer mute function
on the system-linked channels can now only be
controlled by the connected system, while the Buzzer
Mute on the channels which are not in System link will
still be controlled by the PS 4379. The Mic Mute signals
given by the other Intercom system are also sent to the
user stations which are connected to the PS 4379 on the
channel which is in system link. If a Mic Mute is given by
the PS 4379, it is only sent to its own channels and does
not mute the microphones of the other Intercom System.
24 ON / OVERLOAD LEDs (per channel)
These LEDs will indicate the status of each channel.
The LEDs will illuminate green if power is supplied by
the internal power supply.
The LEDs will flash red, when the corresponding
channel is reaching an overload. In this case the
channel is still functioning but will shut off, if further units
are added. If all LEDs are flashing the complete system
is close to going into overload and should additional
units be added, the channel will shut down. The LEDs
will go constantly red, when too many units have been
connected or if there is a short circuit on the correspon-
ding channel. If all LEDs are lit red and one or more
channels are switched off, a master overload occurred.
In this case the channel with the lowest load will switch
User Manual PS 4379 - Issue 1 © 2007 ASL Intercom, Utrecht, The Netherlands 9