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Bosch Security Systems | 04-2003 | 3922 988 43318 en
Digital Congress Network | Installation and Operating Manual | Chapter 2 - Contribution Equipment
en | 2-3
LBB 3530/xx and LBB 3531/xx Delegate Discussion Unit
2.2 LBB 3530/xx and LBB 3531/xx
Delegate Discussion Unit
Delegate units LBB 3530/xx and LBB 3531/xx enable delegates to speak, register a request-to-speak
and listen to the floor speaker. Delegate unit LBB 3531/xx includes a built-in channel selector, for use
in discussions where more than one language is used and simultaneous interpretation is available. The
channel selector includes up/down select keys and a 1.5-digit LC-display for rapid selection of the
required language channel. Channel selection is limited to the number of channels available.
Controls and Indicators (FIG. 2-3)
1. Uni-directional condenser microphone with built-in pop and windshield, mounted on a ‘flexible’
stem. Its illuminated light ring indicates microphone active (Default: not active in ‘Voice’ activated
mode, for other settings see Chapter 2.3.1 - Adjustment setting discussion units)
2. Numeric display (1.5-digit LC-display with back-lighting) with 2 x push-button (up/down) for
language channel number selection (LBB 3531/xx only)
3. 2 x 3.5 mm jackplug socket for headphones.
4. Rotary volume control for headphones only
5. Microphone on/off button.
6. Microphone on/request-to-speak bi-colour LED (red - on, green - request-to-speak)
7. Loudspeaker. The loudspeaker is muted automatically when the microphone is ON and or a
headphone is connected
NOTE: Mic. stem length LBB 3530/00, LBB 3531/00 (310mm/12.20 in) incl. microphone.
LBB 3530/50, LBB 3531/50 (480mm/18.89 in) incl. microphone.
For rear view see FIG. 2-6.
FIG. 2-3 Delegate units LBB 3530 and LBB 3531
2.3 LBB 3533/xx and LBB 3534/xx
Chairman Discussion Unit
The Chairman units LBB 3533/xx and LBB 3534/xx have the same functions as a delegate unit with
the exception of a ‘Priority’ button. This button when pressed enables its user to control the
discussion by temporarily or permanently overruling and muting all active microphones. Chairman
unit LBB 3534/xx also includes a built-in channel selector (see delegate unit). In permanent mode, all
delegates waiting to speak are also removed from the request-list.
Controls and Indicators (FIG. 2-3 and FIG. 2-4)
8. Priority key which when pressed temporarily or permanently overrules and mutes all active
microphones (depends on setting in the CCU), and keeps the microphone on for as long as the
button is pressed.
NOTE: Micr. stem length LBB 3533/00, LBB 3534/00 (310 mm/2.20 in) incl. microphone.
LBB 3533/50, LBB 3534/50 (480 mm/18.89 in) incl. microphone.
For rear view see FIG. 2-6
For side view see FIG. 2-3
FIG. 2-4 Chairman units LBB 3533 and LBB 3534
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Side view
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LBB 3530/00
LBB 3530/50
LBB 3531/00
LBB 3531/50
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LBB 3533/00
LBB 3533/50
LBB 3534/00
LBB 3534/50
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