User's Manual Part 1

Bosch Security Systems | 2007-11 | 9922 141 70691 en

DCN Wireless | Installation and User Instructions | System Design and Planning en | 26

9 Technical data 9.1 System electrical and

electro-acoustic

characteristics

9.1.1 General

9.1.2 Routing links

• From delegate microphone to interpreter

headphones

• From delegate microphone to delegate headphones

• From interpreter microphone to delegate

headphones

• From interpreter microphone to interpreter

headphones

• From auxiliary input to delegate headphones

• From auxiliary input to interpreter headphones

• From delegate microphone to auxiliary output

• From interpreter microphone to auxiliary output

table 9.1: Electro-acoustic characteristics

Nominal input level:

85 dB SPL

Maximum input level:

110 d B S P L

Automatic gain reduction (not for PA-floor output):

• 24 dB (interpretation channels)

• 12 dB (delegate loudspeaker channel)

Automatic gain reduction with:

• 3 dB (2 microphones on)

• 6 dB (4 or more microphones on)

Loudspeaker volume control:

24 steps of 1 dB and off (mute)

table 9.2: Transmission links

Frequency response:

• 125 Hz to 20 kHz (General)

• 125 Hz to 3.5 kHz (Intercom links)

Harmonic distortion:

< 0.5%

Harmonic distortion @ overload:

< 1%

Crosstalk attenuation @ 4 kHz:

> 80 dB

Dynamic range:

> 90 dB