Installation manual

16
Unswitched #3 and #4 inputs are always presented to the crew
headphones and to the aircraft speaker.
Unswitched
Input
Hear in
Fail Safe
Hear in
Crew Headset
SPKR button
Select
1
Yes
Yes
No
2
No
Yes
Yes
3
No
Yes
No
4
No
Yes
No
5 (jack)
No
Yes
No
MARKER BEACON
The Outer marker will light up the “O” lamp and present a 400 Hz
dash tone. The lamp and tone flash on/off at a rate of 2 tones
and flashes per second.
The Middle marker will light up the “M” lamp and present a 1300
Hz alternating dot and dash tone. The combination dots and
dashes will be at a rate of 95 per minute.
The Inner marker will light up the “I” lamp and present a 3000 Hz
dot tone. The lamp and tone flash on/off at a rate of 6 tones and
flashes per second.
Marker Beacon sensitivity is defaulted to LO and is only changed
via an optional external cockpit switch.