All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon Hobby, LLC.
For up-to-date product literature, visit horizonhobby.com and click on the support tab for this Product.
MEANING OF SPECIAL LANGUAGE
The following terms are used throughout the product literature to indicate various levels of potential harm
when operating this product:
NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND little
or no possibility of injury.
CAUTION: Procedures, which if not properly followed, create the probability of physical property damage AND
a possibility of serious injury.
WARNING: Procedures, which if not properly followed, create the probability of property damage, collateral
damage and serious injury OR create a high probability of superficial injury.
WARNING: Read the ENTIRE instruction manual to become familiar with the features of the product before operating.
Failure to operate the product correctly can result in damage to the product, personal property and cause serious injury.
This is a sophisticated hobby product. It must be operated with caution and common sense and requires some basic mechanical
ability. Failure to operate this product in a safe and responsible manner could result in injury or damage to the product or other
property. This product is not intended for use by children without direct adult supervision. Do not attempt disassembly, use with
incompatible components or augment product in any way without the approval of Horizon Hobby, LLC. This manual contains
instructions for safety, operation and maintenance. It is essential to read and follow all the instructions and warnings in
the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or serious injury.
WARNING AGAINST COUNTERFEIT PRODUCTS
Always purchase from a Horizon Hobby, LLC authorized dealer to ensure authentic high-quality Spektrum product. Horizon Hobby,
LLC disclaims all support and warranty with regards, but not limited to, compatibility and performance of counterfeit products
or products claiming compatibility with DSM or Spektrum.
NOTICE: This product is only intended for use with unmanned, hobby-grade, remote-controlled vehicles and aircraft.
Horizon Hobby disclaims all liability outside of the intended purpose and will not provide warranty service related thereto.
Age Recommendation: Not for Children under 14 years. This is not a toy.
WARRANTY REGISTRATION
Visit community.spektrumrc.com today to register your product.
SAFETY PRECAUTIONS
• Always ensure all batteries have been properly charged
prior to using the model.
• Always check all servos and their connections prior
to each run.
• Never operate your model near spectators, parking areas
or any other area that could result in injury to people or
damage of property.
• Never operate your model during adverse weather
conditions. Poor visibility can cause disorientation
and loss of control of your model.
• Never point the transmitter antenna directly toward
the model. The radiation pattern from the tip of the
antenna is inherently low.
• If at any time during the operation of your model you
observe any erratic or abnormal operation, immediately
stop operation of your model until the cause of the
problem has been ascertained and corrected.
2
Spektrum DX4r prO • tranSmitter inStructiOn manual
FCC Information .........................................................23
IC Information ............................................................24
Compliance Information for the European Union ...........24
N
P
C
L
M
J
K
Spektrum DX4r prO • tranSmitter inStructiOn manual
Slide the power switch (J)
to power ON the transmitter.
A Spektrum logo screen will
appear, then the Main Screen
will show on the LCD screen (O).
3
EN
Q. Steering Tension Adjustment Screw
R. Throttle Tension Adjustment Screw
S. Trigger Sizing
QR
S
STEERING TENSION ADJUSTMENT
The steering tension is adjustable using the screw below
the steering wheel. Turn the screw clockwise to increase
the steering tension.
THROTTLE TENSION ADJUSTMENT
The trigger tension is adjustable using the screw in front
of the throttle trigger. Turn the screw clockwise to increase
the trigger tension.
INSTALLING BATTERIES
TRIGGER SIZING
You can adjust the trigger to fit your driving style.
To adjust the trigger:
1. Loosen the screw on the back of the trigger.
2. Adjust the trigger spacing as necessary.
3. Tighten the screw on the back of the trigger.
CAUTION: NEVER remove the transmitter batteries
while the model is powered on. Loss of model control,
damage or injury may occur.
MODELMATCH
The Spektrum DX4R PRO transmitter features ModelMatch™
technology, preventing you from operating a vehicle when the
wrong model memory is active in the transmitter. If you select
the wrong model memory, the receiver will not respond to
the transmitter.
4
Spektrum DX4r prO • tranSmitter inStructiOn manual
CHARGING (NOT AVAILABLE ON ALL TRANSMITTERS)
EN
Charger Pigtail for Transmitter
BLACK TO POSITIVE
BLACK W/WHITE STRIPE TO NEGATIVE
Spektrum Transmitter Charge Jack Polarity
-
DX4R PRO transmitters with part numbers that end
in E do not have charge jacks.
All Spektrum charge jacks are center pin negative. Before using
a charger, use a voltmeter to make sure the connector is center
pin negative. When charging, use a charger designed for four
cells (4.8-volt battery pack).
+
CHARGING WARNINGS
WARNING: Failure to exercise caution while using
this product and comply with the following warnings could
result in product malfunction, electrical issues, excessive
heat, FIRE, and ultimately injury and property damage.
• Read all safety precautions and literature prior to use of
this product.
• Never leave the battery and charger unattended during use.
• Never allow children under 14 years of age to charge
battery packs.
• Never attempt to charge dead or damaged batteries.
• Never charge a battery if the cable has been pinched
or shorted.
• Never allow batteries or charger to come into contact
with moisture at any time.
• Never charge batteries in extremely hot or cold places
(recommended between 50–80°F (10–26°C)) or place
in direct sunlight.
• Always use only Ni-MH rechargeable batteries. This charger
cannot charge batteries such as “heavy duty”, “alkaline”,
“mercury” or “lithium” battery.
• Always connect to the charger correctly.
• Always disconnect the battery and charger after charging
and let them cool between charges.
• Always inspect the battery before charging.
• Always terminate all processes and contact Horizon Hobby
if the product malfunctions.
• Always make sure you know the specifications of the
battery to be charged or discharged to ensure it meets
the requirements of this charger.
• Always constantly monitor the temperature of the battery
pack while charging.
• Always end the charging process if the charger or battery
becomes hot to the touch or starts to change form during
the charge process.
• Always charge in a well-ventilated area.
THE RUBBER GRIP
This transmitter includes 2 sizes of grips. The small-size grip
is installed at the factory.
To change the rubber grip
1. Lift the edge of the grip and pull the grip away from the
handle.
2. Align the tabs on the new grip with the slots in the handle.
3. Press the grip against the handle.
UPDATING THE FIRMWARE
The DX4R PRO features an SD card reader, enabling you to
update the transmitter when firmware updates are available.
Register your transmitter at www.SpektrumRC.com
to receive the latest information regarding firmware
updates. To install firmware updates on your
DX4R PRO transmitter:
1. Remove the grip from the back of the transmitter handle.
2. Download the latest firmware from www.SpektrumRC.com
to an SD card. The transmitter serial number can be found
by going to the About screen.
Spektrum DX4r prO • tranSmitter inStructiOn manual
3. Install the SD card in the card reader slot on the
4. Power on the transmitter. A Spektrum logo and an
5. Remove the SD card from the card slot on the transmitter.
6. Re-install the rubber grip on the transmitter handle.
DX4R PRO transmitter.
installation bar will appear. Installation is complete
when the Main screen appears.
5
EN
EC3EC3
WARNING SCREENS
LOW BATTERY ALARM
An alarm will sound and the voltage will flash on the main screen
when the transmitter’s battery power falls below a set limit. This
alarm reminds you to stop using the vehicle immediately; power
off the transmitter and replace the batteries. Set the low battery
limit using the System Screen.
RECEIVER COMPATIBILITY
LED
Bind/Battery Port
SR2000 RECEIVER
Built-in Antenna Tube Mount
Antenna
Antenna Tube
Antenna
Aux 2 Port
Aux 1 Port
Throttle Port
Steering Port
Bind Plug
LED
Aux Port
Throttle Port
Steering Port
Bind/Battery Port
INACTIVITY ALARM
The alarm reminds you to power off the
transmitter and save battery power. If the
transmitter is powered on for more than
10 minutes and no control movement is
detected, the inactivity alarm will sound.
Moving any control stops the alarm.
The DX4R PRO transmitter is compatible with Spektrum™
DSMR™, DSM®, DSM2®, and Marine surface receivers.
The included SR410 DSMR receiver is only compatible
with DSMR transmitters.
AVC – ACTIVE VEHICLE CONTROL
AVC™ technology is the newest Spektrum™ RC innovation from
Horizon Hobby. This Spektrum stabilization system adds a whole
new level of control to your RC driving experience. AVC technology utilizes sensors to adjust steering and throttle output, providing you with a more stable and controlled driving experience.
NOTICE: You must use digital servos with the SRS4210
receiver. Using analog servos will reduce the performance
of the system and may cause analog servos to overheat.
Install the receiver in your vehicle using double-sided foam servo
tape. Foam servo tape holds the receiver in place and protects
the receiver from vibration. Position the antenna vertically and
away from the vehicle in an antenna tube. The SR410 has a coax
style antenna. The last 31mm of the antenna is the portion that
receives the signal from the transmitter.
NOTICE: Do not cut or bend the antenna or it could
become damaged.
ELECTRIC VEHICLE INSTALLATIONNITRO VEHICLE INSTALLATION
Throttle Servo
Steering Servo
Receiver
6
Battery
Electronic
Control
To Motor
Speed
Receiver
Steering Servo
Spektrum DX4r prO • tranSmitter inStructiOn manual
Battery
EN
Turn
Press
Press
MAIN SCREEN
A
The Main Screen displays information about the active model, including
the Timer (when activated). To return to the Main Screen at any time,
press and hold the Rolling Selector for at least 3 seconds.
A. User Name
B. Name assigned to the Model memory
C. Timers (when activated)
D. Transmitter Battery Voltage
E. Steering Percent
F. Position of Steering (St) trim
G. Position of Throttle (Th) trim
H. Position of Aux 1 trim
I. Position of Aux 2 trim
J. Brake Percent
C
D
E
F
G
H
I
J
PROGRAMMING GUIDE
USING THE ROLLING SELECTOR
Press the Selector to enter a highlighted function.
Roll the Selector to highlight a function or change settings
and values when selected.
Press and hold the Selector for more than 3 seconds in any
screen to return the display to the List Screen or the Main Screen.
To program, always start with a press on the Selector, then roll,
then press, then roll, and so on.
To Enter, Choose
or Exit a selection.
INDIVIDUAL DIRECTION ADJUSTMENTS
In some instances, you may find it necessary to independently adjust the control directions; for example, if you want more travel
for left steering than right steering, perform the following steps:
1. Scroll to the value you wish to change and press the Rolling Selector.
2. When both directions are selected, move the control (steering or throttle) toward the control direction you wish to change.
The selection box moves to the desired direction. You do not need to hold the control in the desired direction.
3. To change the opposite direction, simply move the control in that direction.
4. Press the Rolling Selector to save the selection.
ROLLHOLDPRESS
To move between
options or change
values in an option.
Hold for 3 seconds
and release to return
to the Main or
Telemetry screen.
B
LIST
The List Screen shows other screens to set programming in
the transmitter. A dark box with a clear symbol or text represents
the highlighted selection. The Active Screen name is displayed
at the top of the screen. Choosing the arrow will open the next
higher screen, such as Main Screen or this List Screen. A small
bar shows the relative position of a highlighted screen name
in the List.
Spektrum DX4r prO • tranSmitter inStructiOn manual
7
EN
MODEL SELECT
SELECT
NAME
Use the Model Select menu to
change the model memory, to assign
a model name or to copy a model.
The DX4R PRO has 50 model
memories available.
CAUTION: NEVER change
the model in Model Select while
operating a model. Changing the
model memory interrupts the
transmitter signal to the receiver
and may cause loss of vehicle
control, damage or personal injury.
Enables you to name the selected
model memory using up to ten
characters.
1. Use the roller to select
a Model Name in the List.
2. Select the character you
want to change. A list of
characters appear.
3. Select the character you
want to use.
4. When you are finished naming
the model memory, select the
arrow to save the name and
return to the list.
COPY
The Copy function shares active
model memory settings with a
selected model memory space.
This is useful for saving setups
for one model to adjust programming for track conditions or
model setups.
Choosing No returns to the List
Screen. Choosing Yes saves the
active model settings to the
selected model memory.
A. Active or source model
memory number
B. Destination model memory number
IMPORTANT: When using the Copy function, model information
will be permanently overwritten by the active model settings.
A
B
TRAVEL
8
The Travel function supports precise endpoint adjustments in all channels. Travel values range from
0–150% (Default is 100%).
NOTICE: Always check the control directions at the extents of travel to be sure the linkages do not
bind. Travel values that are too high will cause binding, which may result in damage to the vehicle.
ChannelTopBottom
SteeringL (left)R (right)
ThrottleB (brake)F (forward)
Aux 1H (high)L (low)
Aux 2H (high)L (low)
Spektrum DX4r prO • tranSmitter inStructiOn manual
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