Bosch Security Systems | 2007-02 | 9922 141 70691 en
DCN Wireless | Installation and User Instructions | System Design and Planning en | 32
9 Technical data
9.1 System electrical and electro-acoustic characteristics
9.1.1 General
9.1.2 Transmission 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
Overload input level:
110 dB SPL
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 gain control:
24 x 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
