Bosch DCN Next Generation Service Manual download pdf (Page 17)

16 | Central Control Equipment | DCN Next Generation Interpretation System Data Brochure

4.3 LBB 4402/00 Audio Expander

The audio expander can contribute audio to and distrib-

ute audio from the system. Typical applications are room

coupling and audio distribution.

Features and benefits

• Award winning design

• Room coupling facility

• Versatile audio distribution facility

• Optical network for coupling to the CCU

• Designed for redundant network cabling. The network can be

either single branch or redundant loop

• Four audio line inputs (of which 2 can be configured as

microphone input) for floor and interpretation channels

• Four audio line outputs for floor and interpretation channels

• Flexible routing of floor and interpretation channels

• Adjustable sensitivity for the audio inputs

• Adjustable level for the audio outputs

• Configuration of the Audio Expander via a display and one

single rotary push button

• Each Audio Expander can be assigned a unique name by the

installer for easy identification

• VU meter readings to monitor audio inputs and audio out-

puts. The audio can be monitored using a headphone

• 19” (2U) housing for table top or rack mounting

• Handgrips for easy transportation

• 19” rack mounting brackets, detachable feets and mounting

accessories included

• The unit is powered from the network

Controls and indicators

• 2 x 16 Character LCD display for status display and configu-

ration of the Audio Expander

• Rotary control at the front to navigate through the LCD menus

Interconnection

• Two optical network connections for connecting to the CCU

• Four 3-pole XLR balanced audio line inputs with galvanic

separation

• Four stereo Cinch unbalanced audio line inputs

• Four 3-pole XLR balanced audio line output with galvanic

separation

• Four stereo Cinch unbalanced audio line outputs

• 8 x control inputs to enable audio inputs and audio outputs

• 5 x control outputs to indicate channel engaged state

• 1 x headphone output 3.5 mm (0.14 in) stereo

Electrical characteristics

Supply voltage 24 – 48 Vdc

Power consumption 5.6 W

Performance

Frequency response 30 Hz – 20 kHz (-3dB at nominal level)

THD at nominal level < 0.5 %

Cross talk attenuation > 85 dB at 1 kHz

Dynamic range > 90 dB

Signal–to-noise ratio > 87 dBA

Audio inputs/outputs

Line Input

XLR nominal input - 12 dBV (± 6 dB)

XLR maximum input + 12 dBV

Cinch nominal input -24 dBV (± 6 dB)

Cinch maximum input + 0 dBV

Microphone Input

Nominal input -57 dBV (± 6 dB)

Maximum input -51 dBV

Phantom supply 12 V ± 1 V @ 15 mA

Line Output

XLR nominal output - 12 dBV (+ 6/- 24 dB)

XLR maximum output + 12 dBV

Cinch nominal output -24 dBV (+ 6/- 24 dB)

Cinch maximum output + 0 dBV

Physical characteristics

Mounting Free-standing or mounted in a 19”-rack

Dimensions (H x W x D) 88 x 483 x 350 mm (3.5 x 19 x 13.8 in)

(with brackets, without feet)

92 x 440 x 350 mm (3.6 x 17.3 x 13.8 in)

(without brackets, with feet)

Weight 6 kg (13 lbs)

Color Charcoal with silver

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