TruTrak Digiflight Operation Manual - Manual (Page 12)

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Any value between 0 and 12
may be chosen. In this example,
the value of 1 will be selected.
Activity should be set so as to
not be exc essive in turbulence
and yet sufficient to fly without
hunting in still air. (Any lost
motion or play between the
servo and the control surface
can cause hunting in still air).
Once activity is set to the
desired value, press and release
the knob to confirm and enter
the selected value into storage.
The underline (cursor) will now
move to the torque setting:
In a manner similar to
activity, use the encoder knob to
select the desired value of roll
servo torque. This value should
be between 75 and 250. A
default value is set at the factory
but may need to be modified to
suit a particular aircraft. The
value chosen should be
sufficient to fly the aircraft, but
not so much that it is difficult to
override the autopilot if
necessary.
Having selected the desired
torque level, again press and
release the encoder knob to
confirm and enter the selected
torque value into storage. The
unit will now show the next
screen:
The value shown represents
the speed of the primary RS-
232 interface to the external
GPS unit. By default at the
factory it is set to 4800 baud, as
that is the NMEA -0183 default.
However, it may be set to any
of 600, 1200, 2400, 4800, or
9600 baud. Consult the manual
for the GPS unit and follow its
setup instructions to determin e
its setting and set the baud rate
of the autopilot to the same
value. The autopilot will
recognize NMEA -0183 protocol
or Apollo GX50/GX60 protocol
(moving map output).
Once the desired baud rate
or Garmin protocol has been
selected, again press and release
the encoder knob to confirm
and enter the selected baud rate
into storage. The unit will now
show the next screen:
This setting is to be left at
zero unless advised by the
factory. Press the encoder knob
and the unit will now show the
next screen:
This setup allows the internal
magnetometer in the unit to be
compensated for any internal
magnetic disturbances within
the aircraft, and should be
performed once the autopilot is
installed in the panel of the
aircraft. It may need to be
repeated if the autopilot is
BAUD RATE 4800
LAT ACTIVITY 1
LAT TORQUE 200
MAG CALIBRATE? N
MICROACTIVITY 0