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LB3340
Code
no. 171.20.053 LB3340 The LB
3340 is an optional automatic level
control module designed to work with the
RB
3300
amplifier control unit ( ACU ). E&OE TEL:
01245 361578
ALC
Board- RX 3000 System
Control
RX
3000 Index Page
The LB 3400 provides two functions. "ALC"
automatic level control via background
noise sensing microphone and under
software control, time of day signal
attenuation " Day/Night" function.
All board functions can be used when
background music is being played. The
noise sensing input is adjustable allowing
the use of up to four condenser
microphones or loudspeakers with line
transformers functioning as
microphones.
Install
Location
The RB 3300, SB 3320, and LB 3340 control
boards can also be used independently from
the RX 3000 system, with the same basic
functions (amplifier-line diagnosis,
automatic switch-on of the emergency
amplifier, control of the ambient
signal/noise ratio). Any emergency
condition can be signalled from a distance
using the specific output
command.
Position in system
