tonalité modulée

OBS: tonalité modulée : terme accepté par le Comité d'étude de la terminologie des cartes de travail du DC-9.

CONT: Place stall warning test switch (located on overhead switch panel) in system number 1 position and hold for approximately 10 seconds; captain's and first officer's control columns should begin to shake, both warning speakers should emit muted varying pitch tone, and stall warning lights should flash in synchronization with aural warning.