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2011-02 | Installation and User Instructions | 5 | Call Stations
18.2.3 Microphone (X70)
The external interface for microphones consists of a pin
header connector with 6 positions (see the PCB for the
pin numbering). The following microphones were
designed to be used in combination with the kit:
•
LBB9081 Hand-held Dynamic Microphone
(including resistors for switch supervision).
•
LBB9082 Gooseneck Dynamic Microphone.
table 18.5: X70 connector details
Pin
Signal
1
Mic-
2
GND
3
Mic+
4
--- not connected ---
5
PTT input contact
6
GND
figure 18.6: LBB9081 connection diagram
figure 18.7: LBB9082 connection diagram
Bosch Security Systems | 2011-02
10kΩ
blue
5
10kΩ
black
6
red
3
white
1
black
(thick)
2
red
3
white
1
black
2
table 18.6: X70 technical data
Microphone input sensitivity:
-50 dBV
Input control range:
-7 to 8 dB
S/N:
min. 60 dB at default sensitivity
Headroom:
min. 30 dB at default sensitivity
Bandwidth:
340 to 14000 Hz
(-3 dB with respect to level at 1 kHz)
en | 220
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