Page 1
PagePac
®
by
Issue 1
AMBIENT LEVEL CONTROLLER
V-5335621
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 inpu t. The mi crophone c an be placed
up to 5000 feet from the ALC with shielded wire. The ALC
has five contact cl osure clock or remote control inputs. The ALC has four double throw rel ay 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 +
• Signal to noise (dB ref.) Better than -60dB
• Maximum output level 0dB, -12dB with jumper installed
• Output relay activaltion poin ts 0dB and -6dB gain reduction
• Output relay contact rat ing 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 contro lled input Yes
• Front panel controls Attenuation manual or automatic
• Front panel indicators Power
Attenuation, automatic
Telephone input active
• Maximum MIC line length 5000 feet
2dB
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FEATURES
• Allows automatic, manual or remote control of paging system audio levels
• SPL meter with over 50 dB range built-in
• Microphone can be placed up to 5000 feet from unit
• Balanced 600 Ohm inputs and outputs
• Loop Start Telco input with priority over line input
• Clock contact closure or remote control input connections
• Relay outputs for emergency override or indicators
• Dry contact closure on line input activates isolated dry contact closure on line output
• Internal microproc essor senses ambient noise via a MIC input, and adjusts the paging level
accordingly
• Rack or wall mount, single rack space
• 24VAC UL listed power supply, Part 15 (FCC) approved
Dimensions/Weight
• 17”W x 1.75”H x 8.75”D (19”W with rack ears)
(43.18cm x 4.45cm x 22.23cm)
• 8 lbs. (3.63 kg)
Environmental/Humidity
• 32 to 104° F (0 to 40° C)
• 0 to 85% non-condensing
TECHNICAL ASSISTANCE
When calling, have a VOM and a telephone test set available and call from the job site.
Call (800) 782-5266 and ask for PagePac Technical Support, or call (540) 427-6000 for Val com 24-hour
Automated Support or visit our websites at http://www.pagepac.com and www.valcom.com.
Should repairs be necessary, attach a tag to the unit clearly stating company name, address, phone
number , contact person, and the nature of the problem. Send the unit to:
Valcom, Inc.
PagePac
5614 Hollins Road
Roanoke, VA 24019-5056
®
Repair Dept.
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INSTALLATION
TELEPHONE
SYSTEM
PAGE PORT
CAUTION: Use only the
FM-14 Log Current Microphone.
standard micr ophone will be
A
damaged if connected to the FM-15.
V-5335621
CONTACT
CLOSURE
Power Input
24 V olts AC
elco In
T
Loop St ar t
AMPLIFIER
600 OHM
PAGE PORT
0dB
INPUT
OUTPUT
TO LINE
INPUT
Output
Line In
Shield
C1 G + -
Level
Line Out to Page Input
100-250 V AC, 50/60 Hz
Line Out
+ -
C1 C
R G B
0 dBm
FM-14
NOTE:
These termin als are redundant
MIC input conne cti ons. Useful
1/4 Modular
Cord or
Full
when a modular RJ-11 plug and
cable is not suitable.
Modular
Cord
Mic Only
Mic Only
NO 1CNC
NO 1CNC
Relay Outputs
NO 1CNC NO 1CNC
Y
NOTE:
These termin als are redundant
Clock Inpu ts or Remo te Co ntrol
-24dB
-24dB
-18dB
NO C
-12dB
NO C
NO C
1
1
NO C
1
-6dB
NO C
1
1
page input conn ections. Useful
when a modular RJ-11 plug and
cable is not suitable.
OR
T
CONTROLLE R
OU
UNIT
LOW
CUT -
70V OUT
+
PAGE
MUSIC IN
-
TIP
C1
RING
RIGHT
LEFT
B
GROUND
Y R G
UNBALANCE D OUTPUT
PAGE AC CES SED
INPUT LEVEL
DUCKING
PAG
INPUT
GND
TIP
C1
RING
DRY LOOP HI Z
LOOP START
DRY LOOP 600 OHMS
GROUND START
OVER LOAD
POWER
AMPLIFIER
100-250 V AC, 50/60 Hz
0 dBm
T
CONTROLLE R
OU
70V OUT
UNIT
LOW
+
CUT -
-
B
PAGE
C1
Y R G
MUSIC IN
RING
RIGHT
LEFT
GROUND
UNBALANCE D OU TP UT
PAGE ACCES SED
INPUT LEVEL
DUCKING
Set to Dry Loop 600 Ohm
Figure 1. Connection to Conventional Paging System
3947194
PAG
INPUT
GND
TIP
C1
DRY LOOP HI Z
LOOP START
DRY LOOP 600 OHMS
GROUND START
OVER LOAD
POWER
Page 4
PAGEPAC PLUS
CONTROLLER
V-5335621
Power Input
olts AC
24 V
Set Zone to Contact
Closure Output
Telco In
Loop Start
Line In
+ -
PBX HOST
TELEPHONE
SYSTEM
Line Input
Line Out
Output
Shield
Level
+ -
R G B
0dbm
C1 C
TO
PAGE
UNIT
FM-14
MICROPHONE
These terminals are redundant
NOTE:
MIC input connections. Useful
0dbu
1/4 Modular
Cord or
Full
Modular
Cord
NO 1CNCNO 1CNC
Clock Inputs or Remote Control
-24dB
NO C
1
Mic Only
NC NO 1CNC
NO
1
C
Mic Only
Relay Outputs
Y
when a modular RJ-11 plug
and cable is not availa b l e.
-24dB
-18dB
-12dB
NO C
1
-6dB
NO C
NO C
NO C
1
1
1
Line Inpu t
Zone Input
V-5335621
AMPLIFIER
AMPLIFIER
Power Inp ut
Telco In
Loop Start
olts AC
24 V
100-250 V
100-250 V
AC, 50/60 Hz
AC, 50/60 Hz
Line In
C1 G
+ -
Line Out to
Page Input
Speakers
Outp ut
Shield
Level
Line Ou t
+ - C1 C
R G B
NOTE:
These terminals are redundant page input connections.
Useful when a modular RJ-11 plug and cable is not available.
OR
AG
T
0 dBm
CONTROLLER
OU
UNIT
LOW
AGE
P
70V OUT
+
-
CUT
MUSIC IN
-
TIP
C1
RING
RIGHT
LEFT
GROUND
INPUT LEV EL
DUCKING
Y R G
B
P
INPUT
GND
TIP
C1
RING
DRY LOOP HI Z
LOOP START
DRY LOOP 600 OH M S
GROUND START
UNBALANCED OUTPUT
PAGE ACCESSED
OVERLOAD
POWER
FM-14
MICROPHONE
OR
These terminals are redundant MIC input
NOTE:
connections. Useful when a modular RJ-11 plug
and cable is not available.
NO 1CNCNO 1CNC
Clock Inputs or Remote Control
-24dB
-24dB
-18dB
NO C
-12dB
NO C
NO C
NO C
1
1
1
1
-6dB
NO C
1
Mic Only
1
NC NO 1CNC
C
Mic Only
Relay Outputs
NO
Y
These terminals are redundant page input connections.
NOTE:
Useful when a modular RJ-11 plug and cable is not available.
OR
AG
T
CONTROLLER
UNIT
70V OUT
LOW
+
-
CUT
0 dBm
OU
MUSIC IN
AGE
P
-
TIP
C1
RING
RIGHT
LEFT
GROUND
INPUT LEVE L
Y R G
B
DUCKING
P
INPUT
GND
RING
TIP
C1
DRY LOO P HI Z
LOOP STAR T
DRY LOO P 600 OHMS
GROUND START
UNBALANCED OUTPUT
PAGE ACCESSE D
OVERLOAD
POWER
Figure 2. Multiple ALCs used with a Single Controller and Multiple Amplifiers
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Page 5
TELEPHONE
SYSTEM
CAUTION: Use only the
FM-14 Log Current Microphone.
standard micr ophone will be
A
damaged if connected to the F M-15.
FM-14 Microphone
V-5335621
Power Input
24 V olts AC
elco In
T
Loop Start
AMPLIFIER
NOTE: Dry Loop Start only.
Do not appl y
Ring Voltage or Dial Tone
Output
Line In
Shield
Level
+ -
C1 G
Line Out to Page Input
100-250 V AC, 50/60 Hz
Line Out
+ -
C1 C
R G B
0 dBm
These terminals are redundant
MIC input connections. Useful
OR
when a modular RJ-11 plug and
cable is not suitable.
Mic Only
Mic Only
Relay Outputs
NO 1NO 1NO 1NO
CNCCNCC
NC
Y
NOTE:
These terminals are redundant
Clock Inputs or Remo te Control
-24dB -24 dB -18dB -12dB -6dB
NC
1
C
NO C 1NO C 1NO C 1NO C 1NO C
1
page input connections. Useful
when a modular RJ-11 plug and
cable is not suitable.
OR
T
CONTROLLE R
OU
UNIT
LOW
CUT -
70V OUT
+
-
B
PAGE
C1
Y R G
MUSIC IN
TIP
RING
RIGHT
LEFT
GROUND
UNBALANCE D OUTPUT
PAGE AC CESSED
INPUT LEVEL
DUCKING
PAG
INPUT
GND
TIP
C1
RING
DRY LOOP HI Z
LOOP START
DRY LOOP 600 OHMS
GROUND START
OVERL OAD
POWER
Set to Dry Loop / 600 Ohm
Figure 3. Connection between Paging Source and Amplifier
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PAGEPAC PLUS
CONTROLLER
Other Zones
V-5335621
Ser #
Power Input
24 V olts AC
TELEPHONE
Zone
CC
Telco In
Loop Start
Line I n
+ -
C1 G
Line Out to Page Input
SYSTEM
Output
Shield
Level
+ -
R G B
Line Out
0dBm
Output
or
C1 C
CAUTION: Use only the FM-14
Log Current Microphone.
A standard microphone will be
damaged if connected to the FM-15.damaged if connected to the FM-15.
FM-14 MICROPHON E
These terminals are redundant
MIC input connections. Useful
1/4 Modular
Cord or
Mic Only
Mic Only
Y
NOTE:
Relay Outp uts
NO 1NO 1NO 1NO
These terminals are redundant
when a modular RJ-11 plug and
cable is not available.
Full
Modular
Cord
Clock I nputs or Rem ote Contro l
-24dB -24dB -18dB -12dB -6dB
NC
1CNCCNCCNCC
NO C 1NO C 1NO C 1NO C 1NO C
1
page input connections. Useful
when a modular RJ-11 plug and
cable is not available.
AMPLIFIER
OR
100-250 V AC, 50/60 Hz
0 dBm
T
CONTROLLER
OU
UNIT
LOW
CUT -
70V OUT
+
PAGE
MUSIC IN
-
C1
TIP
RING
RIGHT
LEFT
GROUND
Y R G
B
Figure 4. Connection for Single Zone Paging
PAG
INPUT
GND
TIP
C1
RING
LOOP START
DRY LOOP HI Z
DRY LOOP 600 OHMS
GROUND ST ART
UNBALANCED OUTPUT
PAGE AC CES SED
OVERLOAD
INPUT LEVEL
POWER
DUCKING
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Page 7
Power Input
olts AC
24 V
RED
WHITE
BLACK
GREEN
elco In
T
Loop Start
POWER SUPPLY
AC 1.6A 60 HZ
24V
DO NOT DEFEAT THE SAFETY
GROUNDING PIN ON THE POWER PLUG.
USE ONLY THE POWER SUPPLY PROVIDED.
C1 G
Line In
+ -
Output
Shield
Level
Line Out
+ -
C1 C
Figure 5. Power Supply Connection
Clock Control or Remote Control of Levels [Manual Override] (see Figure 6)
In the case where a user wishes to control the system level by the time of day, it is a simple matter with
the ALC. Use a clock with four separate dry contact closures assigning each to a different time of day.
So long as the contacts are closed the level selected will override the front panel controls. Should two
contacts be closed at the same time the lower level selected will have priority. Also a manual normally
open switch may be used to achieve this result.
Control of External Devices [Relay Outputs] (see Figure 6)
The ALC provides for control of external devices tha t need activation at maximum noise levels. This is
provided by four sets of dry contact closures on the back panel. These activate at -6 and 0 dB levels.
This can be used for priority override of remote level controls, strobe activation or similar applications.
Set the manual level control to automatic [Blue knob] (see Fi gure 7). This allows the ALC to calibrate
itself. The automatic positi on will allow the ALC to cons tantl y change the pagi ng level to compens ate for
the changes in noise level in the area being monitored.
Check the SPL meter [Green LED] (s ee Figur e 7) f or maximum noise l evel. This is y our hi gh noise l evel
reading. Then set the maximum noise level control [Red knob] to the average high noise level. If you
feel the room noise may actually be louder at some time, move the control up on e cli ck to the right
[clockwise].
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The paging level meter [Red LED bar graph] (see Figur e 7) indi cates the paging level changes that are
taking place with dual LEDs.
Calibration complete.
Clock C ontrol or Remote Co ntrol of Levels
Manual Override
Clock Inputs or Remote Control
-24dB -24dB -18dB -12dB -6dB
NC
NO C 1NO C 1NO C 1NO C 1NO C
1
Mic Only
Mic Only
NC
C
Relay Outputs
NO
1
NO
NC
C
NO
NC
C
1
1
C
NO
1
Control of External Devices
Relay Outputs
Figure 6. Clock Control or Remote Control of Levels Manual Override, Relay Outputs
elephone Input
T
Active
Set Maximum Noise Level
95dB
90dB
85dB
100dB
105dB
Manual Lev el Con t rol
-24 dB
Automatic Level
Control
-18 dB
-12 dB
-6 dB
100dB
90dB
80dB
70dB
60dB
Noise Level
dB SPL
105dB
95dB
85dB
75dB
65dB
Paging Level
dB
Full V
-6 dB
-12 dB
-18 dB
-24 dB
olume
Manu al Level Co ntrol
[Blue Knob]
Sets Level of Audio
meter
SPL
[Green LED]
Non-functional
Paging Level
[Red LED]
Maximu m N oi se
[Red Knob]
Not Used
Figure 7. Manual Level Control of the ALC without the Microphone & Remote Manual Level Cont rol
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FM-14 Log Current Microphone (see Figure 8)
The wire for the FM-14 Log Current Mi crop hone does not have t o be s hielded. Th is can be a phone l ine
existing in the building. Use a RJ-11 connector at the microphone. When connecting the MIC, use a
RJ-11 connector or wire directly to the terminal stri p marked MIC ONLY.
OR
Output
Level
Line Out
+ -
1/4 Modular
Cord
Mic Only
C1 C
Full Modular
Cord
Mic Only
NO
C
1
Figure 8. Connection of the FM-14 Log Current Microphone
Manual Use of the Ambient Level Controller (see Figure 7)
The ALC may be used without the FM-14 MIC. In this mode the ALC becomes a leveler or limiter for a
manual control of the sound system. The Telco input or the line input may be in this mode. The SPL
meter will not function but all other f unctions will work in the normal way. The manual level control on the
front panel will set the level of the sound system [Blue knob].
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Microprocessor Update Timing Period (see Figure 9)
To change the microprocessor update period, remove the top cover, find the jumpers marked “Timing
Adj. J4 and J5”, then refer to the chart below.
R8
PERIOD J4 J5
0.5 Seconds IN OUT
1.0 Seconds OUT IN
2.0 Seconds OUT OUT
4.0 Seconds IN IN
C14
C13
TIMING ADJ1
J9
TIMING ADJ2
S3
R10
R11
C15
Y1
U11
J4
J5
RP7
RP8
C12
elco In
T
Loop Start
-24
VR5
-18
VR4
-12
VR3
-6
VR2
SET
-6 dB
VR1
Figure 9. Timing Adjustments for J4 and J5
Output Level Control
Line In
C1 G
+ -
Minus 12dB Jumper
Output
Shield
Level
+ -
Line Out
C1 C
J6
-12 dB
OP VIEW
T
Mic Only
Line In Enable
Line Out put Enable
Figure 10. Output Level Control
10 947194
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