Avidyne IFD540 Pilot's Manual page 159

Integration
Category
40/50, etc.)
"Cooperative"
electronics (e.g.
Avidyne EXP5000)
5-3 Navigation
Description
commands to set
course (e.g. "auto-
slew") on those
external device(s).
The "cooperative"
system is even
more capable than
the IFD and
therefore is the
primary navigation
control device.
All nav source
selection and
course setting is
performed on the
external device.
The IFD becomes a
"slave" to the
external device.
IFD Functionality
available states.
Nav source modes
available:
GPS,
VLOC,
GPS  VLOC,
OBS,
OBS  VLOC.
Course values will
display on the IFD
but are set on the
external device(s).
Nav source modes
available:
None (the nav
source knob will
appear to be non-
functional).