Protrim; Range Test; Timer - Spektrum DX20 Instruction Manual

FUNCTION LIST

ProTrim

ProTrim allows the Rates, Expo, Mixes, and Differential (Aileron,
V-Tail, Rudder, Tip-Aileron, and Flap) to be adjusted by the left and/
or right trims during initial trimming flights.
To setup Left or Right ProTrim:
1. Scroll to CENTER, then press the scroll wheel to zero the value
of the trim in it's current position. Pressing CENTER will center
the Trims and allow for further trimming even if the trims have
been moved to there end points.
2. Scroll to Adjust, then press the scroll wheel to select Rates,
Expo, Mixes or Differential.
3. If Rates or Expo are selected, scroll to Axis to select the axis
that Pro Trim modifies. The Left /Right and Up/Down directions
can be made active or Inhibited.
Because ProTrim is designed to fine tune final trims and not as a
standard flight trim, it will revert back to INH after the next power
cycle.
When ProTrim is Active, moving one of the trim buttons will enable
a Pro Trim menu to appear on the main screen. When Pro Trim
is displayed, press the scroll wheel to go directly to the Pro Trim
Menu.

Range Test

The Range Test function reduces the power output. This allows for
a range test to confirm the RF link is operating correctly. Perform
a range check at the beginning of each flying session to confirm
system operation.
To Access the Range Test screen:
1. With the transmitter on and the main or telemetry screen
displayed, press the scroll wheel. The Function list displays.
2. Scroll to highlight Range Test, then press the scroll wheel to
access the Range Test function.
3. With the Range Test screen displayed, push and hold the
trainer button. The screen displays Reduced Power. In this
mode the RF output is reduced allowing for an operational
range test of your system.
4. If you let go of the trainer button, the transmitter will go back
to Full Power.
IMPORTANT: Telemetry alarms are disabled during the
Range Test.

Timer

The DX20 Timer function allows you to name and program a
countdown timer or stop watch (count up timer) to display on the
main screen. An alarm sounds when the programmed time is
reached. You can program the timer to start using the assigned
switch position or automatically when throttle is raised above a
programmed position. Two internal timers are available that show
run time for a specific model displays on the Main Screen. A total
system timer is also available.
SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
IMPORTANT: ProTrim is to be used for small adjustments in flight,
not large changes.
IMPORTANT: ProTrim will not move a value from + to - direction
for safety. Large adjustments should be made on the ground and
verified correct on the ground prior to flight to prevent un-expected
control response in the air.
Range Testing the Dx20
1. With the model restrained on the ground, stand 30 paces
(approx. 90 feet/28 meters) away from the model.
2. Face the model with the transmitter in your normal flying
position and place the transmitter into Range Test mode (see
above). Then push the trainer button; the power output will be
reduced.
3. Operate the controls. You should have total control of your
model with the transmitter in Range Test mode.
4. If control issues occur, contact the appropriate Horizon Product
Support office for assistance.
5. If performing a range test while a telemetry module is active,
the display will show flight log data.
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