LSC22 Loudspeaker Controller
ASM-LSC22 Installation and Operation Manual
January 24, 2017 Rev: 1.00
Page 1-1
ENG-FORM: 800-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
Section 1.0 Description
1.1
Introduction
Information in this section consists of product description, design features and specifications for the LSC22
Loudspeaker Controller. All derivative product information will be contained in the applicable manual
supplement, which may be obtained from AEM as required.
Review all notes, warnings and cautions.
1.2
Product Description
The LSC22 Loudspeaker Controller is designed to provide
centralized control for an aircraft’s internal and
external loudspeaker systems.
The design is contained in one panel mounted unit, with an illuminated faceplate.
All audio and key lines are interfaced to existing aircraft audio systems.
Front panel switches provide selection of the various operational modes of the LSC22 and a
potentiometer provides output volume control.
Onboard flash memory provides a means to record messages for playback at a later time. A front panel
connector provides programming/recording access.
1.3
Design Features
The LSC22 provides selection and control of internal or external PA system(s) installed in an aircraft. An
integrated 25W speaker driver circuit is designed to drive one 8 Ohm speaker arrangement for internal
paging. The LSC22 also provides one low level audio signal external output that can drive the input on a
remote mounted power amplifier.
The LSC22 generates wail and yelp siren audio for use with a remote power amplifier and speaker
system.
A ‘-3dB’ function allows the output level of the system to be reduced by 3 dB when the input control line is
grounded. Removing the ground returns the system to full output.
This function is used to create an “auto
level control’ that automatically increases the system output volume following engine start.
