Bosch 3922 988 43318 User Manual

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Bosch Security Systems | 04-2003 | 3922 988 43318 en
Digital Congress Network | Installation  and Operating Manual | Chapter 13 - Technical Data
en | 13-10
Electrical data
13.5.4  Combined units
Delegate microphone with transmission link to interpreter headphone
Delegate microphone with transmission link to delegate headphone
Delegate microphone with transmission link to auxiliary output
Interpreter microphone with transmission link to interpreter headphone
Interpreter microphone with transmission link to delegate headphone
Interpreter microphone with transmission link to auxiliary output
Typical frequency response
:
125 Hz (-8 dB) - 14.000 Hz (-8 dB)
Front-to random sensitivity index
:
> 4.6 dB
Rated equivalent sound pressure level
due to inherent noise
:
< 25 dB (A)
Total harmonic distortion at overload
:
< 1 %
Crosstalk attenuation
:
> 80 dB
13.5.5  System Electrical and Electro-acoustical characteristics
Nominal input level
:
85 dB SPL
Overload input level
:
110 dB SPL
Automatic gain reduction at Overload
input level (not applicable to
PA-floor output)
:
30 dB (interpretation channels)
18 dB (loudspeaker channel)
Automatic gain reduction with
:
3 dBm (2 microphones on)
-
6 dBm (4 microphones on)
Operator master gain control
:
15 x 1.5 dB and OFF (Mute)
Loudspeaker gain control
:
14 x 1.5 dB and OFF
13.5.6  System environmental conditions
Temperature range:
Transport:-20 to +55 °C (-65 to 131° F)
Operational:+5 to +45 °C (+41 to 113° F)
Relative humidity:95% max.
Safety:acc. to EN 60065,  and: acc. to CAN/CSA E65-94 and UL6500 (UL and cUL) for LBB 
3500/xxD, LBB 4106/00D and LBB 3508/00D
EMC emission:acc. to harmonized standard EN 55013 (1988)and FCC rules (part 15) complying 
with the limits for a class A digital device.
EMC immunity:acc. to harmonized standard EN 55020 (1987)
EMC approvals:affixed with the CE mark, EC directive 89/336 EEC
Shock resistance:acc. to IEC 86.2.29 Eb
Vibration resistance:acc. to IEC 68.2.6 Fc, procedure A
NOTE: 
 The maximum operational temperature for ALL operational contribution units 
with LC-display is 40°C. The maximum operational temperature for the Ext. Power supply 
unit LBB 4106/.. is  +40°C.
Safety Standards for North America
Approvals (CSA, C and USA):CAN/CSA E65 -94 UL 6500
13.5.7  Interface data
LBB 3500/..  Central Control Unit
Line in/outputs:-18 dBV/ +12 dBV* (nominal/maximum)
Recorder input/output:-33 dBV/ -3 dBV(nominal/maximum)
* -12 dBV / +18 dBV when used as symmetrical output..
LBB 3508/00  Audio Media Interface Unit
Symmetrical line outputs (XLR)
Channels 0 up to 11 (Interpretation):+1 dBV/1 dBV (nominal/maximum)
Channels 12 and 14 (PA):-8 dBV/ +22 dBV
Channel 13 (del. loudspeaker):+1 dBV/ +13 dBV
Asymmetrical line outputs (Cinch)
Channels 0 pot 11 (Interpretation) :-10 dbV/ -10 dBV (nominal/maximum)
Channels 12 and 14 (PA):-19 dBV/ +11 dBV
Channel 13 (del. loudspeaker):-10 dBV/ +2 dBV
13.5.8  Mains supply
LBB 3500/05 (D), LBB 3500/15 (D),
:
105 - 115 - 125 - 220 - 230 - 240 V
LBB 3500/35 (D), LBB 4106/00 (D),
+ 6% / -10 %
LBB 3508/00 (D)
NOTE: 
 Upon delivery
:
230 V
125 V  (D-versions)
13.5.9  Power consumption (nominal)
LBB 3500/05 (D)
:
175 W
LBB 3500/15, LBB 3500/35 (D)
:
350 W
LBB 4106/00 (D)
:
350 W
LBB 3508/00 (D)
:
175 W