Bosch DCN Next Generation Installation And User Instructions Manual page 76

DCN NG | Installation and User Instructions | Section 3 | Central Control Equipment
8.7.8 Audio inputs
Number of connections:
1x female XLR for each audio input
2x cinch for each audio input
Position:
Rear side
Cable:
Shielded cable
Input transformers:
Optional and only for the XLR sockets.
Maximum input signal level:
18 dBV (XLR), 6 dBV (cinch)
Nominal input level:
-12 dBV (XLR), -24 dBV (cinch)
Nominal level range:
-12 to 0 dB with respect to maximum input level
Frequency response (without transformers):
-3 dB at 20 Hz and 20 kHz
Frequency response (with transformers):
-3 dB at 30 Hz and 20 kHz
Input impedance:
100 kΩ (XLR), 12 kΩ (cinch), 22 kΩ (with
transformers)
Signal-to-noise ratio:
> 87 dBA at maximum output level
CMRR (without transformers):
> 40 dB
CMRR (with transformers):
> 60 dB at 100 Hz
Input crosstalk:
< -85 dB at maximum level
Distortion (without transformers):
< 0.05% at 1 kHz at -3 dB of the maximum input level
Distortion (with transformers):
< 0. 1 % at 100 Hz at -3 dB of the maximum input level
Note
Input transformers 1:2 (ST7301-1) available as
service part 3922 000 02351.
Bosch Security Systems | 2004-03 | 9922 141 70521en
8.7.9 Audio outputs
Number of connections:
1x male XLR for each audio output
2x cinch for each audio output
Position:
Rear side
Cable:
Shielded cable
Output transformers:
Optional and only for the XLR sockets.
Maximum output signal level:
18 dBV (XLR), 6 dBV (cinch)
Nominal output level (general)
-12 dBV (XLR), -24 dBV (cinch).
Nominal output level (for recording):
9 dBV (XLR), -3 dBV (cinch)
Nominal level range:
-31 to 0 dB with respect to maximum output level
Frequency response (without transformers):
-3 dB at 20 Hz and 20 kHz
Frequency response (with transformers):
-3 dB at 30 Hz and 20 kHz
Output impedance:
< 100 Ω
Signal-to-noise ratio:
> 89 dBA at maximum output level
Output crosstalk:
< -85 dB at maximum output level
Distortion (without transformers):
< 0.05% at 1 kHz at -3 dB of the maximum input level
Distortion (with transformers):
< 0. 1 % at 100 Hz at -3 dB of the maximum input level
Note
Output transformers 1:1 (ST7679) available as
service part 2422 531 02541.
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