Bosch Plena Operating Manual page 181

Plena
Clause / Requirement
The VACIE output power shall be as
declared by the manufacturer.
13.12.2 Signal-to-noise ratio
The VACIE shall have an A-weighted
signal-to-noise ratio of at least 45 dB (see
IEC 60268-1).
13.12.3 Frequency response
The frequency response of the VACIE
shall fit within the non-shaded area in
Figure 1 for sound sources without
microphone(s) (e.g. message store) and
Figure 2 for sound sources with
microphone(s).
1
VACIE frequency response limits without
microphone(s)
Key
1 relative output signal level, with
2 1/3 octave frequency band (Hz)
Bosch Security Systems B.V.
20
15
10
1
0,125 0,4
0
4,0
-1 1,0
-10
-15
-20
reference to 0 dB signal level
measured at 1 kHz (dB)
Installation and Operation manual
Compliance
The output power of the amplifier
elements of the Plena Voice Alarm
System (Power Amplifiers, Basic
Amplifiers) are specified in the
data sheets and in the IUI.
The A-weighted signal-to-noise
ratio of the Plena Voice Alarm
System amplifiers (Power
Amplifiers and Basic Amplifiers) is
specified in the data sheets and in
the IUI. The signal-to-noise ratio is
above 75 dB. The complete signal
chain from microphone to
loudspeaker is compliant to this
clause.
The frequency response of all
Plena Voice Alarm System sound
paths that do not include
microphones is within the
2
specified limits of this clause.
8,0 20
Appendices | en 181
Signature
2013.07 | V2.0 |