Digital Altimeterstatus Digita Altimeterstatus Analogaltitude Altimeterstatus Device of interest Altitude nterface Switch Power-on Signal (DOl Reset Signal DOl Status Signal Watchdog TimerAltimeter Digital Altimeter Analog Digital Altimeter Pilot Interface Device of Interest Switch (DOI) Altitude Watchdog Timer Power-on Signal Strobe DOI Status Signal altitude status altitude status altitude status Inhibit Signal Reset Signal ë