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 +70
G
C (-40 to 158
G
F)
N
ope5
to
+45
G
C (41 to 113
G
F)
+5 to +35ºC (41 to 122ºF) for LBB 4560
+5 to +55
G
C (41 to 131
G
F) 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)