Installation Guide Instruction Manual
 Autopilot Installation and Configuration 
STEP 6 - AUDIO ALERTS CONFIGURATION 
  This section applies only if you have installed the optional AP74. 
The optional AP74 can act as the sole audio alert source for all DSAB-connected Dynon 
instruments. The audio output of the AP74 reports both EFIS and EMS alerts; each type of alert 
can be configured to be either voice or tone formats. When the AP74 is connected to your 
system, audible alerts are still generated by both EMS- and EFIS-based instruments. If you 
would like the AP74’s audio out to be your only source for Dynon product audible alerts, 
disconnect the audio out connections on your other DSAB-connected Dynon products. 
  The AP74 and HS34 have identical voice output capabilities. If an HS34 Voice/Tone 
output is already connected to the aircraft intercom, do not connect the AP74 Voice/Tone 
output. If the Voice/Tone output of both an HS34 and an AP74 are connected in parallel, 
audio alerts will be distorted. 
To configure AP74 audio alerts, enter the 
EFIS > SETUP > AP menu, scroll down to 
AUDIO ALERTS, and press SEL►. The 
following points describe the options 
available for each setting: 
EMS AUDIO ALERTS 
RPM HIGH 
MANIFOLD PRESSURE HIGH 
OIL PRESSURE HIGH/LOW 
OIL TEMPERATURE HIGH/LOW 
EGT [1..6] HIGH/LOW 
EGT SPAN 
CHT [1..6] HIGH/LOW 
CHT SPAN 
CHT [1..6] SHOCK 
FUEL LEVEL [1..4] LOW 
FUEL PRESSURE HIGH/LOW 
FUEL FLOW HIGH 
VOLTAGE HIGH/LOW 
CURRENT HIGH/LOW 
COOLANT TEMPERATURE HIGH 
COOLANT PRESSURE HIGH/LOW 
All other EMS alerts vocalized “EMS ALERT” 
EFIS AUDIO ALERTS 
ALTITUDE (Altitude alerter) 
CLIMB/DESCEND (Altitude alerter) 
AUTOPILOT DISCONNECT 
STALL 
TIMER EXPIRED 
DSAB ERROR 
EMS: EXT TONE / EXT VOICE – Sets 
whether you want the AP74 to report tones 
or voice alerts during EMS alarm 
conditions. This setting has no effect on the 
“direct” audio output of the EMS. 
EFIS: EXT TONE / EXT VOICE – Sets 
whether you want the AP74 to report tones 
or voice alerts during EFIS alarm 
conditions. The “direct” audio output of the 
EFIS is muted*. 
EFIS: EFIS TONE – tones are generated 
through the “direct” audio output of the 
EFIS and the audio output of the AP74 is 
muted. 
AOA: EXT TONE – During an AOA 
alarm condition, tones are generated 
through the AP74 audio output and the 
EFIS “direct” audio output is muted*. 
AOA: EXT VOICE – During an AOA 
alarm condition, voice is generated through 
the AP74 audio output simultaneously with 
a “progressive” tone from the EFIS “direct” 
audio output. 
AOA: EFIS TONE – Tones are generated 
FlightDEK-D180 Installation Guide    8-23 










