Bosch Appliances 3922 988 43318 Combined units, System environmental conditions, Interface data

Digital Congress Network Installation and Operating Manual Chapter 13 - Technical Data en 13-10

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

Bosch Security Systems 04-2003 3922 988 43318 en Electrical data