The AA37 series are dual channel Alerting Systems that provide two to three level alerting.
The AA37 Alerting Systems are compact, remote mounted units. All outputs
are fully isolated to allow installation in dual audio controller
systems. Trigger inputs can be active low or active high dependent on
the model, allowing easy interface to common aircraft systems. The tone
and rate of the alerts are adjustable to allow tailoring of the tones to
ensure they do not interfere with existing airframe warning functions.