User manual

12 SPEKTRUM DX20 • TRANSMITTER INSTRUCTION MANUAL
EN
You establish failsafe positions when you bind your transmitter and
receiver. If the radio signal connection is lost between the transmitter
and receiver, the receiver immediately moves the aircraft control
surfaces to the failsafe positions. If you assign the receiver THRO
channel to a transmitter channel other than throttle, we recommend
usingPresetfailsafewiththethrottleinthelowposition.
Some receivers do not support Failsafe on throttle set to channels
other than the throttle channel. These receivers will hold last
command.
NOTICE: Failsafe features vary according to receiver. Always consult
the receiver instruction manual for failsafe features.
Before flight, ALWAYS confirm the failsafe functions as you would
expect.
SmartSafe™ Failsafe
SmartSafe failsafe is a technology that only acts on the throttle channel
and offers the following benefits:
• Preventselectricmotorsfromoperatingwhenthereceiverpower
is on and the transmitter power is off.
• Preventsthespeedcontrollerfromarminguntilthethrottleis
moved to the low throttle position.
• Powersoffanelectricmotorandreducesgas/glowenginestoidle
if signal is lost.
To Program SmartSafe:
Move the throttle to the low or off position before putting the
transmitter into bind mode.
To Test the SmartSafe failsafe
1.Powerthetransmitterandreceiveron.
2.Poweroffthetransmitter.Thethrottleshouldimmediatelymove
to the failsafe position.
CAUTION: Make sure the aircraft is fully restrained on the
ground. If the failsafe is not set correctly, your aircraft might
advance to mid or full throttle.
Hold Last Command
The Hold Last Command failsafe maintains the last command on all
channelsexceptthrottle.Iftheradiosignalislost,theaircraftmaintains
the commanded control inputs until the receiver regains signal.
To program Hold Last Command, follow the provided binding
instructions in this instruction manual.
To Test Hold Last Command:
1.Poweronthetransmitterandreceiver.
2. Move one of the control sticks to the desired Hold Last
Command position and hold the input.
3.Whileholdingthecontrolinput(forexample,asmallamountof
rudder)poweroffthetransmitter.Theruddershouldmaintain
the input command.
CAUTION: Make sure the aircraft is fully restrained on the
ground. If the failsafe is not set correctly, the aircraft throttle
might advance to mid or full throttle.
Preset Failsafe
ThePresetfailsafemovesallchannelstotheirprogrammedfailsafe
positions.
WerecommendusingPresetfailsafetodeployspoilersonsailplanes
to prevent a flyaway if the radio signal is lost.
To program Preset failsafe:
1. Insert the bind plug in the bind port on the receiver and power
on the receiver.
2. Remove the bind plug when the orange LED on the main
receiver and all attached remote receivers flash rapidly. The
orange receiver LEDs will continue flashing.
3. Move the transmitter control sticks and switches to the desired
Presetfailsafeposition.Powerthetransmitteron.
4. Failsafe programming is complete when the orange LEDs on
the transmitter and all receivers turn solid.
CAUTION: Make sure the aircraft is fully restrained on the
ground. If the failsafe is not set correctly, the aircraft throttle
might advance to mid or full throttle.
PROGRAMMING FAILSAFE POSITIONS
IMPORTANT: NotallreceiverssupportPresetFailsafe.Consultyour
receiver manual for more information.