TruTrak Digiflight Operation Manual - Manual (Page 5)

4
Controls
The Digiflight series
autopilot uses the simplest
controls available. All
programming is done via a
rotary encoder knob and entered
by depressing and then
releasing the knob. This will be
referred to hereafter as enter.
There is a small button located
to the left of the display. This
button toggles between the
default (
TRK
) mode and the
GPS-S-
mode (or
GPS NAV
mode
if GPS steering is not
available). Engaging the
autopilot can be done by either
momentarily pushing
and
releasing the encoder knob on
the programmer or by pushing
and holding the switch located
on the control wheel or stick for
more than two seconds and then
releasing. Disengaging can be
done either of two ways: by
pushing and holding the
encoder knob on the
programmer for approximately
three seconds and then releasing
the knob, OR by momentarily
pushing and releasing the
switch located on the control
wheel or stick. This means that
in addition to disengaging the
autopilot, this switch also
provides the function referred to
as Control Wheel Steering in
that the autopilot synchronizes
to both direction and vertical
speed upon being engaged.
Initializing the
Autopilot
The autopilot master switch
should be in the off position
when the engine is started.
Aircraft electrical systems can
generate voltage transients
during an engine start, and like
other avionics systems, the
autopilot should not be
subjected unnecessarily to these
conditions. After start up, turn
on the autopilot master switch
and hold the aircraft stationary
as the internal gyros are
initialized. This takes
approximately ten seconds
during which time the display
will show the words
PWR UP
in
the lower right. The software
version will be momentarily
displayed in the lower left.
When initializing is
complete
PWR UP
will change
to
AP OFF
.
MAG 160
vX.XX PWR UP
MAG 160
AP OFF