Issue 1
1
947194
AMBIENT LEVEL CONTROLLER
V-5335621
by
PagePac
®
INTRODUCTION
The Ambient Level Controller (ALC) constantly monitors
room noise and adjusts the paging level to accommodate
for any changes in noise level. It has a built-in Sound
Pressure Level (SPL) meter.
SPECIFICATIONS
The ALC has two inputs, a loop start input (Telco) and a
balanced 600 Ohm line input. The Telco input shall have
priority over the line input. The microphone can be placed
up to 5000 feet from the ALC with shielded wire. The ALC
has five contact closure clock or remote control inputs. The ALC has four double throw relay outputs that
activate on the -6 dB and 0 dB levels.
The ALC adjusts page system level in 6 dB steps. The Telco input is loop start and has priority over the
line input. The line input has a dry contact closure which will provide an isolated dry contact closure at
the connections of the line output.
• Power consumption
60 Watts
• Frequency Response
250 Hz to 15 KHz + 2dB
• Signal to noise (dB ref.)
Better than -60dB
• Maximum output level
0dB, -12dB with jumper installed
• Output relay activaltion points
0dB and -6dB gain reduction
• Output relay contact rating
1 Amp
• Number of relay output contacts
4
• Input level controls (internal)
5
• Control requirements
Dry contact closure
• Input types
Line, Telco (loop start only)
• Output types
Line (600 Ohm)
• Contact closure on output
Yes
• Contact closure controlled input
Yes
• Front panel controls
Attenuation manual or automatic
• Front panel indicators
Power
Attenuation, automatic
Telephone input active
• Maximum MIC line length
5000 feet
