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54 | DCN Central Control Equipment |
4.2 Control Unit
LBB 3500/05, LBB 3500/05D*
Basic Central Control Unit
• Conference control without operator (stand-alone)
• Controls up to 240 contribution units
• Facilities for microphone management, voting and simultane-
ous interpretation
• Built-in automatic audio equalizer
*Note: Type numbers with a 'D' are intended for the
North American market. They are CSA/UL approved,
and have a modified mains supply and supply cord.
The Basic Central Control Unit is the heart of a stand-
alone discussion and conference control system. This
compact and versatile unit includes features for control-
ling delegate microphones, distributing simultaneous
interpretations and conducting voting sessions - all
without the need of a central control operator.
The unit can be used free-standing on a table-top or
mounted conveniently in a 19" rack housing.
• Built-in power supply unit to supply both the Central Control
Unit and all externally connected DCN equipment. Up to 90
contribution units can be driven (this figure represents the
number of units rated with a Power Consumption Factor
[PCF] of 1.) For further information on the PCF, please refer
to chapter 9, Technical Data)
• Control facilities for controlling up to 240 contribution units.
This includes delegate and chairman units, interpreter desks,
dual audio interface units and multi-purpose connection units
• Control facilities for an unlimited number of distribution units
such as audio media interface units, data distribution boards
and electronic channel selector units
DCN Data Brochure
• Digital audio control and processing facilities for thirty Hi-Q
• Automatic audio equalizer for delegate and chairman
• Control and processing facilities for ten 64 kByte data
• Basic microphone management facilities for a wide variety of
• Three operational modes are available:
• Each mode of operation allows the selection of one, two or
• Basic voting control which provides a parliamentary voting
• Basic simultaneous interpretation functions with as many as
• Automatic camera control (stand-alone)
Controls and indicators
• Mains on/off switch with green LED indicator
• 'Active Microphone' button with three yellow LED indicators
• 'Microphone Mode' button with three yellow LED indicators
• Equalizer button with two LED indicators to indicate ON
• Rotary loudspeaker tone controls, for bass and treble
• Rotary loudspeaker volume control Interconnection
• Three outlet trunk-line cable connectors for connection
digital audio channels, which can be used for contribution,
interpretation and distribution purposes. The unit also
provides four separate communication channels
loudspeakers
channels
conference situations
- 'OPEN': microphone-key control with request-to-speak
registration (AUTO)
- 'OVERRIDE': microphone-key control with override of
already active microphones (FIFO)
- 'VOICE': voice-activated microphones
four delegates microphones to be activated simultaneously
procedure. Delegates can register 'PRESENT', 'FOR',
'AGAINST' and 'ABSTAIN'. Chairman can start, stop and
suspend voting. The total results can be displayed on hall
displays and on delegate/ chairman LCD screens
11 interpretation channels plus the floor language
to select the maximum number of delegates microphones
which may be activated simultaneously (1, 2 or 4)
to select microphone operating mode (OPEN, OVERRIDE
or VOICE)
(green LED) or BUSY (red LED) plus a switch to initiate
automatic audio equalizer adjustment
adjustment
of contribution, distribution, and interpretation units, plus
extension power supplies. Each socket is protected against
short-circuit. (3 x 6-pole circular connectors)
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