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ASM-LSC22 Installation and Operation Manual
3.3.5
Siren Selection
The LSC22 comes with default WAIL and YELP siren audio for use only with external
speaker amplification (EXT PA). However, each siren can also be re-configured by loading
an alternate digital wav file with the unit powered off using the same method as Message
3.
To activate the siren audio, set the PLAY/REC switch to the center (off) position, set the
EXT PA/INT PA switch to EXT PA, set the WAIL/YELP switch to the desired siren, then
trigger the SIREN KEY discrete input. The siren audio will be active as long as the SIREN
KEY discrete input is active.
If so desired, the SIREN KEY discrete input can be directly connected to airframe ground.
This will result in the siren being activated when the WAIL/YELP switch is set to either
WAIL or YELP and will be active until the WAIL/YELP switch is set back to the center (off)
position.
3.3.6
System On/Off & Volume
Controls turning the LSC22 on/off and the volume control of the EXT PA and INT PA audio.
When fully counter-clockwise into the detent (off) position, the LSC22 can have Message
3 and the siren audio programmed through the front panel AUX connector.
When switched out of the detent position, the LSC22 unit is turned on and provides a
discrete SWITCHED POWER output for remote amplifier activation.
3.4
Sidetone
The LSC22 has a sidetone output derived solely from the microphone input and is activated by the MIC
KEY discrete input.
3.5
-3dB Select
The LSC22 can provide a partial muting function by activating the -3DB SELECT discrete input.
This reduces the signal level on the EXT PA and INT PA audio outputs by 3dB.
This function is used to create an "auto level control' that automatically increases the system output volume
following engine start. It is typically controlled by a switching function in the aircraft (eg. oil pressure switch)
that would allow the PA system to differentiate between the engine(s) running/not running.
January 24, 2017 Rev: 1.00
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
LSC22 Loudspeaker Controller
End of Section 3.0
Page 3-4
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