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INTEGRUS | Digital Infra-red Language Distribution System en | 53

BOSCH Security Systems | February 2003

7 Technical Data

7.1 System Specification

Overall system characteristics

N Conforms to IEC 60914, the international standard for conference systems

N Conforms to IEC 61603 part 7, the international standard for digital infra-red transmission of audio signals for conference

and similar applications

Transmission Characteristics

N IR transmission wavelength 870 nm

N Modulation frequency Carriers 0 to 5: 2 to 6 MHz, according to IEC 60603 part 7

Carriers 6 and 7: up to 8 MHz

N Protocol and modulation technique DQPSK, according to IEC 60603 part 7

System Audio Performance

(Measured from the audio input of an LBB 4502 transmitter to the headphone output of an LBB 4540 receiver.)

N Audio frequency response 20 Hz to 10 kHz (-3 dB) at Standard Quality

20 Hz to 20 kHz (-3 dB) at Premium Quality

N Total harmonic distortion at 1 kHz < 0.05 %

N Crosstalk attenuation at 1 kHz > 80 dB

N Dynamic range > 80 dB

N Weighted signal-to-noise ratio > 80 dB(A)

Cabling and System Limits

N Cable type 75 Ohm RG59

N Maximum number of radiators 30 per HF output

N Maximum cable length 900 m per HF output

System Environmental Conditions

N Working conditions Fixed/stationary/transportable

N Temperature range

N transport -40 to +70GC (-40 to 158GF)

N operating +5 to +45GC (41 to 113GF)

+5 to +35ºC (41 to 122ºF) for LBB 4560

+5 to +55GC (41 to 131GF) for LBB 4502

N Maximum relative humidity < 93%

N Safety According to EN 60065, CAN/CSA-E65 (Canada and US) and UL 6500

According to EN 60065, CAN/CSA-E65 (Canada and US) and UL 1419

for LBB 4511/00 and LBB 4512/00

N EMC emission According to harmonized standard EN 55103-1 and FCC rules part 15,

complying with the limits for a class A digital devices

N EMC immunity According to harmonized standard EN 55103-2

N EMC approvals Affixed with the CE mark.

N ESD According to harmonized standard EN 55103-2

N Mains harmonics According to harmonized standard EN 55103-1

N Environmental requirements Contains no banned substances as specified in UAT-0480/100 (e.g. no

cadmium or asbestos)

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