TruTrak Digiflight II Instal Manual - Manual (Page 10)

system, and the micro activity setting is a way to compensate for the lost motion. Press the ALT button to move to the next
setup screen.
The HALF-STEP setting in most cases will not need to be changed. If the half step setting is set to Y (yes), then the pitch
servo will now have higher resolution, and take smaller steps. While this setting will make the servo take smaller steps, it will
decrease the amount of available torque. This setting should be left at N (No), unless it is observe that the nose moves up and
down very slightly while in altitude hold in very still air.
Once satisfactory results are obtained in flight dynamic settings, the back-up magnetometer of the
autopilot should be calibrated.
Proceed to “Magnetic Calibration” for instructions on this operation.
Contrast Adjustment
The Digiflight II contrast should only be adjusted while on the ground. To enter the contrast adjust mode, with the autopilot
powered off, push and hold the encoder knob in. Turn on the power to the autopilot, and after 1 second release the knob. The
display will show the current contrast setting. Rotate the knob to select the desired contrast ratio. Too low a number and the
words will fade out on the display, and too high a number the background will become dark, and the text unreadable. To exit
the contrast adjustment screen, press and release the encoder knob.
This concludes the in-flight setup of the DigiFlight II / IIVS autopilot.
PSS / GPSV APPROACH PICTORIAL G
TruTrak Flight System 8 DigiFlight II Series Auto Pilot Installation Manual
December 2009 8300-008 Rev D