TruTrak Digitrak Install and User Guide User Manual

Page 12

TruTrak flight systems

DigiTrak Installation Manual

October 2009

8300-009 Rev B

Definitions

ACTIVITY

(Setting range 0 – 24) The velocity at which the servo moves the control surface. The higher the
number the more movement you will see in the control surface. With a standard servo (DSB-X,
DSP-X) you should start at 0 then work your way up in flight to set the level for your aircraft. The
High Torque Servo (DSB-HB, DSB-HC) has a different gear ratio, so an Activity setting of 12 will
be equal to about 0. With too low a setting the aircraft will hunt slowly and appear to be lazy. With
too high a setting the aircraft will hunt rapidly, and appear nervous and jittery.

TORQUE

(Setting range 0-12) The holding force that the servo has on the control surface. This setting should
not be too low; the reason is that the servo will not be able to fly the aircraft in turbulence. The
lower the setting the easier it is to override the servo if you need to. It is recommended that the
torque be set in moderate turbulence, so that one can be certain that the level is not set too low.

BAUD RATE

(Setting Range 600-9600) This is the communication speed that must match your GPS serial output
setting. Most handhelds are 4800 and most panel mounts are 9600.

DigiTrak Settings

Engage the autopilot by pressing and releasing the ON OFF button. Then press and hold both arrow buttons for approximately
5 seconds, until the first setup screen is displayed.

“1” LATERAL ACTIVITY

Tap the correct arrow button as necessary to adjust the lateral activity value to a value of 1 or 2. Press and release the ON OFF
button to advance to next setup screen.

“2” LATERAL TORQUE

Tap the correct arrow button as necessary to adjust the torque value close to the maximum value of 12. Press and release the
ON OFF button to advance to next setup screen.

“3” BAUD RATE

Select either 48 or 96. Where 48 is a baud rate of 4800 and 96 is a baud rate of 9600. Press and release the ON OFF button to
advance to next setup screen.

“4” MAGNETIC CALIBRATION

This is the option for calibrating the internal backup magnetometer. To this question, leave the answer set to 0 (which means
“no”) at this time. This operation will be done at a later time during flight testing. Press and release the ON OFF button to
leave the setup