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9.5 System electrical and electro-acoustic characteristics
General
Nominal input level
Overload input level
Automatic gain reduction at
overload input level
(not for PA-floor output)
Automatic gain reduction with
- 2 microphones on
- 4 or more microphones on
Operator master gain control
Loudspeaker gain control
9.6 System environmental conditions
General
Working conditions
Temperature range
- transport
- operating*
*Note: For LBB 3506 and all contribution units with LC-Displays, the maximum is +40 °C (104 °F)
Relative humidity
Safety
EMC emission
EMC immunity
EMC approvals
ESD
Additional immunity tests
Mains harmonics
Other legal requirements
Shock resistance
Vibration resistance
9.7 Interface data
LBB 3544, 3545, 3546, 3547 Concentus Units' recommended external microphone type (or headset microphone)
Element:
Polar pattern
Operating voltage
Sensitivity
Frequency response
Connector
85 dB SPL
110 dB SPL
30 dB (interpretation channels, 18 dB
(delegate loudspeaker channel)
3 dBm
6 dBm
15 x 1 dB and OFF (Mute)
14 x 1 dB and OFF
fixed/stationary/transportable
-20 to +55 °C (-4 to 131 °F)
+5 to +45 °C (41 to 113 °F)
95% max.
according to EN 60065, and according to CAN/CSA-E65-94 (C and US) and UL 6500-96
for LBB 3500/xxD, LBB 4106/00D and LBB 3508/00D
according to harmonised standard EN 55013 (1988) and FCC rules (part 15) complying
with the limits for a class A digital device
according to harmonised standard EN 55020 (1987)
affixed with the CE mark. EC directive 89/336 EEC
according to IEC 801-2; contact 4 kV, air 8 kV. Fast transients
to the mains and data lines according to IEC 801-4
according to IEC 801-3. Field strength 3 V/m in the
frequency range 80 - 1000 MHz. Severity level 3: not affecting normal operation
prepared to EN 60555-2 Class A
no cadmium used other than in the Nickel-Cadmium battery housed in the central unit
according to IEC 68.2.29 Eb
according to IEC 68.2.6 Fc, procedure A
electret-condenser
omni-directional
5 Vd.c.
approx. -62 dB at 1200 W (0 dB = 1 V/mbar at 1 kHz)
100 Hz to 14 kHz
3.5 mm jack mono or stereo
DCN Data Brochure
| Technical Data | 95
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