Lucent Technologies Car Amplifier LU100WAMP User Manual

Telephone Paging Amplifier  
35- and 100-Watt Models  
Installation and Use Manual  
Issue 1, October 1999  
© 1999 Bogen Communications, Inc.  
All rights reserved. 54-2019-01 9910  
LU35WAMP: PEC Code: 5328-035  
COM Code: 408186070  
LU100WAMP: PEC Code: 5328-101  
COM Code: 408186088  
Select Code: 701-000-100  
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Contents  
Page  
Page 3 of 12  
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Telephone Paging Amplifier  
POWER  
PEAK LEVEL  
APHEX  
TREBLE  
BASS  
RINGER VOLUME  
MUSIC MUTE  
MUSIC VOLUME  
MIC VOLUME  
AMPLIFIER  
TEL VOLUME  
ALC  
BRIDGING  
MUSIC IN  
GND  
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
CONTROLS  
MIC  
TEL  
COM  
R
T
+
Figure 1: Telephone Paging Amplifier  
Introduction  
This document describes the Lucent 35- and 100-watt Telephone Paging Amplifiers.  
These are full-featured, wall-mounted amplifiers which provide inputs for dry loop  
600-ohm telephone page signal, background music source, and low impedance  
microphone. A set of control inputs allow an external contact closure to mute  
background music and open the telephone page channel. Background music mute  
level during page is adjustable and the music slowly fades back in after the page is  
completed. An automatic level control system limits the output level of the  
telephone page channel so that differences in the volume of the paging party's voice  
will be less noticeable. Bass and treble controls are provided for adjusting the quality  
of the output signal. An Aphex® Aural Exciter feature is also provided. Aphex  
improves the clarity of the output signal by replacing the higher frequency harmonics  
that are normally lost through the telephone system.This amplifier includes a built-  
in night ringer that can be triggered by either a standard telephone (analog) ring  
signal or an external contact closure. The night ringer mutes the background music,  
but not pages.  
Package Contents  
* Telephone Paging Amplifier unit  
* Pair of Rack Mount Brackets  
* 8 mounting screws  
* Installation and Use Manual  
BeforeYou Start  
Review the contents of the box. Read through this entire manual to understand how  
this product installs and operates.  
NOTE: Be sure you have enough 22 AWG shielded, twisted pair wire (COM Code:  
401882956, PEC Code: 2734-SPK) for your speaker runs.  
Page 4 of 12  
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Figure 2: Mounting the Amplifier  
SCREW 1/2"  
TRUSS-HEAD  
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RACK  
MOUNTING  
SCREWS ARE  
NOT SUPPLIED  
Installation  
The amplifier is designed for wall mount applications but can also be mounted in a  
standard 19" rack using the included rack adapter brackets. The 35W amplifier  
weighs 16 lbs. and the 100W amplifier weighs 21 lbs.  
Mounting  
NOTE: The amplifier will produce heat during operation which will rise and may  
cause problems for temperature-sensitive equipment mounted above it. Mount the  
amplifier near the top of the backboard (for wall mounting) or rack (for rack  
mounting) so that no other equipment will be above it. If this is not possible, then  
allow at least 12" between the top of the amplifier and the bottom of any  
equipment positioned above it. Also allow at least 4" between the bottom of the  
amplifier and any equipment below it to allow for adequate air circulation.  
Wall Mounting  
To wall mount this unit, use the four 5/8” pan head screws with nylon washers  
provided (see Figure 2).The screws should protrude approximately ¼" from the  
surface of the backboard. Lift the amplifier and place it over the 4 screws using the  
keyhole slots in the flanges at the sides of the amplifier.The screws should engage  
the keyhole slots. Once in the keyhole slots, tighten the screws to secure the  
amplifier.  
Rack Mounting  
To mount the amplifier in a 19" rack, it is first necessary to attach the rack adapter  
brackets to the amplifier flanges (see Figure 2). Start the four ½" truss-head self-  
tapping screws into the 2 small round holes in each of the adapter brackets. Be  
certain to secure the screws from the correct side of the brackets.The brackets  
should mirror each other so that they can be installed on opposite sides of the  
amplifier. From behind the amplifier, slip the rack adapter, with screws, through the  
opening in the keyhole slots and slide them up in to the keyhole slots.Tighten the  
screws securely. Lift the amplifier up to the front of the rack and secure it to the  
rack with the necessary screws (not included). The amplifier will protrude out  
from the front of the rack.  
Page 5 of 12  
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Wiring Connections  
IMPORTANT: Before making any connections or wiring changes to the amplifier  
or any equipment connected to the amplifier, make sure that the amplifier is NOT  
plugged into an AC outlet.  
NOTE: The amplifier does not have a power switch, so it must be unplugged in  
order to turn the power off.  
All signal input and control wiring is made to the terminal strip and RCA connectors  
beneath the left side access cover. Loosen the 2 Phillips-head screws on each side  
of the cover and remove it.  
Input Wiring  
TEL Input and Control Pair  
The telephone input is a 600-ohm, dry loop, balanced input. It is controlled by a dry  
contact closure that is made between the control terminals labeled TEL and COM.  
Shorting these terminals together will mute the background music input and open  
the Tel page channel (see Figure 3).  
NOTE: In instances where the amplifier is to be placed permanently in theTel page  
mode, a wire jumper must be installed between the TEL and COM terminals.  
Telephone Paging Amplifier  
Figure 3: Wiring for TEL Input  
MIC VOLUME  
TEL VOLUME  
ALC  
BRIDGING  
MUSIC IN  
GND  
APHEX  
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
CONTROLS  
MIC  
COM  
TEL  
R
R
T
T
+
Universal Paging Access Module  
BGM  
IN  
MODE  
OFF  
ON  
T
R
24VDC PWR SUPPLY  
48VDC PWR SUPPLY  
CONFIRMATION TONE  
PREANNOUNCE TONE  
VOX DISABLE  
S1,S2  
PHONE SYSTEM  
EXT VOX ENABLE  
S1,S2  
S3  
+M  
S4  
S3  
-M  
PT  
S4  
S5  
PAGING OUTPUT  
VOX ENABLE  
S5  
PR  
N.O.  
CONTACT CLOSURE A  
COM  
PAGE PORT  
INPUT  
+24/48  
POWER SUPPLY  
(TRUNK ACCESS ONLY)  
-24/48  
(0.1A)  
BGM  
VOL  
MODE  
SWITCHES  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
TONE VOL.  
VOX DELAY  
PAGING TIME  
CONTACT CLOSURE B  
N.O. COM  
Page 6 of 12  
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Tel Input to Universal Coupler  
After properly connecting your Universal Coupler (909) to your Auxiliary Trunk  
port, set your switches as follows: C1/C2 to C2; Rocker Switch 3 closed; and all  
others open. Coming out of the J2 Jack of the Coupler, connect the blue/white pair  
to the amplifier Tip and Ring. Connect the brown/white pair to Tel and Com on the  
control terminals.  
Music Input  
A single RCA connector is provided for the connection of a background music  
source. Use a male RCA-to-RCA cable (not included) to make this connection. This  
is a mono input and requires that the output of stereo sources be converted to  
mono by using a Y-adapter (not included). Use a LUWMT1A to balance the music  
input, if necessary, to reduce hum/noise from a grounded music source.  
Microphone Input  
A high gain, low impedance microphone input is provided in this amplifier. It is  
designed to work with microphone LUSZMIC (Com Code: 408186238, PEC Code:  
5335-400). Connect the microphone's black wire to the amplifier's "-" (negative)  
terminal under the MIC BAL connections. Connect the microphone’s Red wire to  
the "+" (positive) terminal. Connect the shield wire from the microphone to the  
adjacent GND terminal. Connect the microphone's white lead to the Control  
terminal marked MIC and the green lead to the COM. (See Figure 4.)  
Two conductor shielded microphone wire should be used to extend the cable from  
the microphone. 22 AWG shielded, twisted pair speaker cable (Com Code:  
401882956, PEC Code: 2734-SPK) will also work. When extending microphone  
cable, be sure to connect the shields of the microphone cable to the extension wire.  
Figure 4: Connect Microphone to Telephone Paging Amplifier  
MIC VOLUME  
TEL VOLUME  
ALC  
MUSIC IN  
BRIDGING  
APHEX  
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
CONTROLS  
MIC  
GND  
COM  
TEL  
R
R
T
T
+
Shield - GND  
White - MIC ‘CONTROLS’  
Green - COM ‘CONTROLS’  
Microphone  
Cable  
Red - MIC + ‘MIC BAL’  
Black - MIC - ‘MIC BAL’  
Page 7 of 12  
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Night Ringer Connection  
Either a standard telephone (analog) ring signal (90 - 105 V AC, 20 - 30 Hz) or an  
external contact closure activates the night ringer function of the amplifier. To  
activate the night ringer using standard telephone (analog) ring, connect the analog  
station's tip lead to theTEL RING "T" terminal and connect the ring lead to the "R"  
terminal. If using an external contact closure, connect the closure pair across the  
CONTACT RING terminals (not polarized).The night ringer follows the cadence of  
the activating signal.  
Bridging Inputs  
Bridging increases the total output power of the system. For example, when two  
100-watt amplifiers are bridged, the total output capacity is 200 watts. Bridging is  
also a means by which to increase the number of amplifier inputs to an amplifier by  
using the input stage of a second amplifier (see Figure 5).The inputs of two or more  
amplifiers can be combined by using the bridging connections provided on these  
amplifiers.An RCA-to-RCA cable (not included) is used to connect the bridging jacks  
of different amplifiers together. Once bridged, each amplifier will amplify the inputs  
present on both amplifiers.The level control of a particular input on an amplifier will  
control the volume of this signal on both amplifiers. The cable used to bridge  
amplifiers should not exceed 20 feet in length.  
NOTE: You can only bridge up to 3 amplifiers at one time.  
Input Cover Replacement  
When all connections are made, remove an appropriate knockout on the input  
cover. Replace the cover and tighten the screws while dressing the wires through  
the knockout hole.  
MIC VOLUME  
TEL VOLUME  
ALC  
POWER  
PEAK LEVEL  
APHEX  
TREBLE  
BASS  
BRIDGING  
MUSIC IN  
GND  
APHEX  
RINGER VOLUME  
MUSIC MUTE  
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
CONTROLS  
MIC  
COM  
MUSIC VOLUME  
MIC VOLUME  
TEL VOLUME  
ALC  
TEL  
R
R
T
T
+
AMPLIFIER  
BRIDGING  
MUSIC IN  
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
CONTROLS  
MIC  
GND  
TEL  
COM  
R
T
+
POWER  
MIC VOLUME  
TEL VOLUME  
ALC  
PEAK LEVEL  
APHEX  
TREBLE  
BASS  
RINGER VOLUME  
MUSIC MUTE  
MUSIC VOLUME  
MIC VOLUME  
TEL VOLUME  
ALC  
AMPLIFIER  
BRIDGING  
MUSIC IN  
GND  
APHEX  
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
BRIDGING  
MUSIC IN  
CONTROLS  
MIC  
COM  
TEL  
R
R
T
T
+
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
CONTROLS  
MIC  
GND  
TEL  
COM  
R
T
+
Figure 5: Bridging Inputs  
Page 8 of 12  
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Output Wiring  
All output wiring connections are made to the terminal strip located under the right  
side access panel. Loosen the 2 Phillips-head screws on each side of the cover and  
remove the cover.  
IMPORTANT: Before making any connections or wiring changes to the amplifier  
or any equipment connected to the amplifier, make sure that the amplifier is NOT  
plugged into an AC outlet.  
NOTE: The amplifier does not have a power switch, so it must be unplugged in  
order to turn the power off.  
Speaker Connection  
70-volt speaker connections are made between the 70V and COM terminals on the  
output terminal strip (see Figure 6).Use a 22AWG shielded,twisted pair cable (Com  
Code: 401882956, Pec Code: 2734-SPK). Connect the shield of the cable to the  
GND terminal of the output terminal strip. The COM and GND Terminals of the  
output terminal strip are connected using a shorting clip.The shorting clip enables  
the amplifier output to act as an unbalanced output (one side of the output  
connected to ground). If desired, the output can be made to be a balanced output  
with no connection to ground. To balance the output, simply remove the shorting  
clip. All speaker connections remain the same as above including connecting the  
shield to the GND terminal.  
NOTE: The amplifier output terminal strip also includes terminals for 16-ohm, 25V  
and 25VCT speaker connections. These are provided for special applications and are  
generally not used.  
CLASS 2 WIRING ACCEPTABLE  
70V  
16  
25V  
25VCT COM  
GND  
+
RINGER VOLUME  
MUSIC MUTE  
MUSIC VOLUME  
MIC VOLUME  
AMPLIFIER  
TEL VOLUME  
ALC  
BRIDGING  
MUSIC IN  
GND  
MIC  
BAL  
TEL  
BAL  
CONTACT  
RING  
TEL  
RING  
CONTROLS  
MIC  
TEL  
COM  
R
T
+
+
Figure 6: Speaker Connection, Output Wiring  
Page 9 of 12  
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Figure 7 : LUWMT1A Connection to RCA Jack on Amplifier  
RCA Jack  
.....  
.....  
.....  
.....  
.....  
.....  
LUWMT1A  
Amplifier  
LUWMT1A Connector  
An RCA jack is provided near the output terminal strip for connection to an  
LUWMT1A impedance matching transformer (Com Code 405891680). A 600-ohm,  
telephone level output signal can be obtained by plugging the RCA connector of the  
LUWMT1A into this jack and taking the output signal off of the LUWMT1A screw  
terminals. (See Figure 7.)  
NOTE: For information on connecting Telephone Paging Amplifiers to the Lucent  
PCM Paging System Zone Controller (model LUPCM), please refer to the LUPCM  
instruction manual.  
Output Cover Replacement  
When all output connections are made, remove the appropriate knockout on the  
input cover. Replace the cover and tighten the screws while dressing the wires  
through the knockout hole.  
Page 10 of 12  
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Operation  
IMPORTANT: Before plugging the amplifier into an AC outlet, turn all volume  
controls to their full counterclockwise positions and all other controls to their  
reference position or to mid rotation.  
Indicators  
POWER IND  
The POWER IND LED illuminates whenever AC power is applied to the amplifier  
(there is no power switch on the amplifier).  
PEAK LEVEL  
The PEAK LEVEL LED illuminates whenever the speaker output signal level  
approaches its maximum level. This indicator is used when setting volume levels.  
Maximum output level is achieved when the PEAK LEVEL indicator flashes  
intermittently on loud peaks of the input signal. If the indicator illuminates steadily,  
the output signal volume is set too high and distortion is occurring. Decrease the  
volume control for the appropriate input until the indicator flashes only  
occassionally.  
TEL VOLUME  
ALC  
This control adjusts the level of the telephone page output. A reference level setting  
position is provided with this control. When set to this position, the output level of  
the page should be about maximum. Further adjustment can be made using the  
PEAK LEVEL indicator described above.  
The ALC controls the level at which the amplifier will begin to limit the output signal  
level. A reference setting position is provided for this control. Normally, the  
reference position provides optimum performance; however, if further adjustment is  
desired, use the following steps for setting the ALC control.  
Manual OutputAdjustment Procedure (follow only if minor adjustments to the  
reference settings are not adequate)  
1) Disable ALC by turning ALC control.  
2) Make a page, speaking softly, yet distinctly. Set the TEL VOLUME control to the  
desired paging level during this page.  
3) Make another page speaking relatively loudly this time. Rotate the ALC control,  
while making the page, until it has the same loudness as the first page.  
NOTE: The TEL Volume and ALC controls work together to set the output level.  
When both controls are set to the reference positions, the amplifier provides a  
nominal 70V signal output (optimum).  
NOTE: The PEAK LEVEL indicator should not show excessive peaking during loud  
pages. If this is occurring, the ALC control must be further increased.  
Page 11 of 12  
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MUSIC VOLUME  
This control adjusts the level of the background music output. No reference level  
setting position is provided. The background music level should be set to an  
acceptable level without overdriving the system. When adjusting this level, the PEAK  
LEVEL indicator should be observed to ensure that the amplifier signal is not  
distorted.  
MUSIC MUTE  
MICVOLUME  
This control adjusts the level of the background music heard during a paging  
announcement. No reference level setting position is provided. The background  
music mute level should be set to the customer's satisfaction, but the page  
announcement must always be easily heard above the background music.  
This control adjusts the level of the microphone page output. A reference level  
setting position is provided with this control. When set to this position, the output  
level of the page should be about maximum. Further adjustment can be made by  
observing the PEAK LEVEL indicator.  
CAUTION: Microphone should not be placed near any paging loudspeakers.  
RINGERVOLUME  
APHEX  
This control adjusts the level of the night ringer tone output. No reference level  
setting position is provided. The background music level should be set to the  
customer's satisfaction. When adjusting this level, the PEAK LEVEL indicator should  
be used to ensure that the amplifier signal is not distorted.  
This control adjusts the amount ofAphex® Aural Exciter effect mixed in to the page  
signal. No reference position is provided for this feature. To use this function, the  
APHEX switch beneath the input connection cover must be set to ON. Setting this  
switch to OFF bypasses theAphex effect and makes the control inoperable.With the  
APHEX switch turned on, make a page and rotate the control until the audio sounds  
crisp and clear.  
BASS andTREBLE  
Bass and treble controls are provided to adjust the high frequency and low frequency  
response of the paging system. Reference positions are provided for these controls.  
When set to these positions, the frequency response of the system will be flat. Set  
the controls to the customer’s satisfaction. Clockwise rotation increases (boosts)  
the response and counterclockwise reduces (cuts) the response. Increasing bass  
and/or treble can cause output signal peaks to increase. Check the PEAK LEVEL  
indicator after making bass adjustment and lower the music input volume if excess  
peaking occurs.  
Page 12 of 12  
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