Bosch Appliances 3.5 manual Clause / Requirement

Praesideo 3.5 Installation and User Instructions EN54-16: 2008

en 53

Clause / Requirement

	20
	15
	10
	1	0,4		2
1	0,125
	0	4,0	8,0	20
	-1
		1,0
	-10
	-15
	-20

figure 1: VACIE frequency response limits without microphone(s)

Key

1 - relative output signal level, with reference to 0 dB signal level measured at 1 kHz (dB)

2 - 1/3 octave frequency band (Hz)

	20
	15
	10
	5				2
1	0,5	0,63	1,25
	0	0,8	1,6	4,0	10
	0,2
			1,0
	-5
	-10
	-15
	-20

figure 2: VACIE frequency response limits with microphone(s)

Key

1 - relative output signal level, with reference to 0 dB signal level measured at 1 kHz (dB)

2 - 1/3 octave frequency band (Hz)

NOTE - The frequency response limits exclude loudspeakers.

NOTE - A bandwidth of 400 Hz to 4 kHz is sufficient to achieve acceptable intelligibility in some acoustic environments. However, a higher frequency limit may be necessary to achieve acceptable intelligibility in more difficult acoustic environments due, for example, to the masking effect caused by reverberation and/or ambient noise.

13.13 Message store(s)

Pre-recorded messages shall be stored in non-volatile memory that retains the messages when all power sources are removed.

NOTE - The use of tapes or magnetic or optical data disks for the storage of emergency messages is not acceptable at the time of drafting this European Standard (see Annex C)

Compliance Signature

The frequency response of all Praesideo sound paths that do not include microphones is within the specified limits of this clause, with the following remarks for the LBB4428/00.

The frequency response of the LBB4428/00 power amplifier shows some interaction with the attached load impedance. For certain load conditions this causes a resonance peak around 10-20 kHz, just exceeding the

+1 dB limit in the frequency band between 6 and 8kHz. The installer shall use the built-in parametric equalizer of this amplifier to flatten the frequency response of each channel by activating the high frequency shelving filter, with gain setting -2 dB at a corner frequency of 6.8 kHz. This setting is valid for all rated load conditions.

A high pass filter at 68 Hz in the equalizer section is enabled by default to decrease the risk of loudspeaker transformer saturation for high level low frequency signals. The high pass filter must remain enabled.

The frequency response of all Praesideo sound paths that include microphones is within the specified limits of this clause.

Praesideo is compliant.

The pre-recorded messages of the Praesideo system are digitally stored on a Compact Flash card in uncompressed format (linear PCM, 16-bit, 44.1kHz). This card retains the messages when all power sources are removed.

Bosch Security Systems 2011-02