Spektrum DX3 Smart DSMR RC Kit, SR315 User guide

2.4GHZ DIGITAL RADIO SYSTEM

Instruction Manual

Bedienungsanleitung

Manuel d’utilisation

Manuale di Istruzioni

EN

NOTICE

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 or towerhobbies.com and click on the support or resources 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:
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.
CAUTION: Procedures, which if not properly followed, create the probability of physical property damage AND a possibility
of serious injury.
NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND a little or no
possibility of 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 technology.

Age Recommendation: Not for Children under 14 years. This is not a toy.

NOTICE: This product is only intended for use with unmanned, hobby-grade, remote-controlled vehicles. Horizon Hobby

disclaims all liability outside of the intended purpose and will not provide warranty service related thereto.

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.

2 SPEKTRUM DX3 USER GUIDE

• 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.

INSTALLING THE TRANSMITTER BATTERIES

This transmitter requires 4 AA batteries.

1. Remove the battery cover from the transmitter.

2. Install the batteries as shown.

3. Install the battery cover.

CAUTION: If using rechargeable batteries,

charge only rechargeable batteries.
Charging non-rechargeable batteries may cause
the batteries to burst, resulting in injury to persons
and/or damage to property.

CAUTION: Risk of explosion if battery is

replaced by an incorrect type. Dispose of
used batteries according to national regulations.

TRANSMITTER FUNCTIONS

Channel 3 Button

A/B.

Throttle/Brake

C.

Steering Wheel

D.

Steering Rate

E.

Adjusts the end point of the steering

Brake Rate

F.

Adjusts the braking end point.

Steering Trim

G.

Adjusts the steering center point. Normally, the steering
trim is adjusted until the vehicle tracks straight.

Throttle Trim

H.

Adjusts the throttle neutral point

SMART Battery Level Indicator

I.

Servo Reversing

J.

To reverse the Throttle (TH) or Steering (ST) channel,
switch the position of the correlating switch—“N” is for
normal, “R” is for reverse.

Throttle Limit

K.

Limits throttle output to 50/75/100%
Select 50% or 75% for less experienced drivers or when
you are driving the vehicle in a small area.

Power LED

L.

• Solid red lights: Indicates radio connectivity and

adequate battery power

• Flashing red lights: Indicates the battery voltage is

critically low. Replace batteries

Power Button

M.

Bind Button

N.

EN

I

J

K

L

M

N

A/B

C

H

G

F

E

D

3SPEKTRUM DX3 USER GUIDE

EN

SR315 RECEIVER

Specifi cations

Type: DSMR
Dimensions (LxWxH): 32.5mm× 21.5mm × 13.4mm
Antenna Length: 3.5 in (90mm)
Channels: 3
Weight: 6g
Band: 2.4GHz (2404 MHz – 2476 MHz)
Voltage Range: 3.5–9.6V

®

(DSM2® compatible)

Steering

Throttle

Aux 1

Battery Port

Bind button

Antenna

BINDING

Binding is the process of programming the receiver to recognize the GUID (Globally Unique Identifi er) code of a single
specifi c transmitter. The DX3™ transmitter and SR315 receiver are bound at the factory. If you need to rebind, follow the
instructions below. You must rebind when:

• Different failsafe positions are desired e.g., when throttle or steering reversing has been changed.

• Binding the receiver to a different transmitter.

• Binding the transmitter to a different receiver.

Failsafe position is set during binding. In the unlikely event that the radio link is lost during use, the receiver will drive all
channels to its programmed failsafe position. The included SR315 receiver may be bound in either of two failsafe modes,
Standard Mode or Preset (Gas) Mode.

Standard Mode (default)

If loss of signal occurs, SmartSafe™ technology moves
the throttle channel to its designated failsafe position (low
throttle, neutral trigger) that was set during binding. All other
channels hold their last position. When the receiver detects
signal from the transmitter, normal operation resumes.

To bind in Standard Mode:

Center the throttle trim knob on the transmitter and

1

ensure the throttle trigger is at the neutral position.

2 Push and hold the receiver bind button.
3 Power on the reciever. The receiver LED will  ash rapidly.
4 Release the receiver bind button.
5 Push and hold the transmitter bind button.

Power on the transmitter. The transmitter power LED will

6

 ash and glow solid when binding is complete.

7 Release the transmitter bind button.

If using a SMART ESC and SMART battery, the transmitter SMART Battery Level indicator will show the vehicle battery level
within 10 seconds of powering on and binding.

Preset (Gas) Mode

Preset failsafe is ideal for most nitro/gas vehicles. With preset
failsafe, all channels go to their preset failsafe positions
if the signal is lost, preventing an out of control situation.
When the receiver detects signal from the transmitter, normal
operation resumes.

To bind in Preset Mode:

Center the throttle trim knob on the transmitter and

1

ensure the throttle trigger is at the neutral position.

2 Push and hold the receiver bind button.

Power on the reciever. The receiver LED will  ash

3

rapidly. Keep the receiver bind button depressed until
the bind process is complete.

4 Push and hold the transmitter bind button.

Power on the transmitter. The transmitter power LED will

5

 ash and glow solid when binding is complete.

6 Power off the receiver.
7 Release the receiver bind button.

Power

Bind

Using An AVC® (Active Vehicle Control) Receiver With the DX3 Transmitter

If using an AVC receiver, such as the SR6100AT, follow bind and calibration instructions as indicated in the receiver manual. To
use the DX3’s CH3 functions with AVC activated, plug into the AUX3 port on the receiver. Use the CH3 A and B buttons as usual.

4 SPEKTRUM DX3 USER GUIDE

TRANSMITTER PROGRAMMING

End Point Adjustment Mode

The default end point value is 100% for both steering and
throttle/brake. The maximum end point value is 150% with
adjustment.

To adjust the endpoints of the steering and throttle/brake:

1. Power the transmitter on while holding the steering

wheel full right and holding the trigger at full brake. The
power LED flashes blue to indicate the transmitter is in
end point adjustment mode.

Steering:

2. Turn and hold the steering wheel full left. Turn the

steering rate knob to set desired end point.

3. Release the steering wheel and reset the steering rate

knob to full.

4. Turn and hold the steering wheel full right and turn

steering rate knob to set desired end point.

5. Release the steering wheel.

If you are adjusting the throttle/brake end points, continue to
the next section. If you are not adjusting the throttle/brake
end points, power off the radio now to save the settings. Set
the rate and brake rate knobs back to the desired positions
before operating the vehicle.

Throttle/Brake:

6. Set the throttle limit (TH LIMIT) switch to 100.

7. Hold the trigger at full throttle.

8. Turn the brake rate knob to set desired end point.

9. Release trigger and reset brake rate knob to full.

10. Hold the trigger at full brake.

11. Turn the brake rate knob to set the desired end point.

12. Release the trigger.

13. Power off to finish.

14. Set the steering rate and brake rate knobs back to the
desired positions before operating vehicle.

CH3 programming, Aux Point Mode

Channel 3 has two modes available, 3-position momentary
(press and release) mode and 5-position latching (press and
hold position) modes.

To select between the modes, power on the transmitter while
holding the bind button, the steering wheel full right and the
trigger at full brake.

The power LED flashes purple to show AUX channel
programming mode is active.

A number of tones sound to indicate the current mode:

• 3 tones for 3-position momentary mode.

• 5 tones for 5-position latching mode.

3-position momentary mode

1. Press the B button. Three audible tones indicate
3-position momentary mode is active.

2. Set the middle point position with the A and B buttons
and save it by pressing the bind button. The center two
LEDs of the SMART battery level indicator illuminate to
indicate the center point is saved.

3. Set the high point position (button A) by turning the
steering rate knob. If only two positions are needed,
power off the transmitter. Otherwise, press the bind
button to proceed to set the low position. The top LED
illuminates to indicate the point is saved.

EN

4. Set the low point position by turning the steering rate
knob. Press the bind button to save the position. The
transmitter powers off, indicating the programming
process is complete.

Start the process over at any time prior to saving the low
point position by pressing either the A or B button.

Remember to return steering rate knob to the desired
position when the programming process is complete.

5-position latching mode

1. Press the A button. Five audible tones indicate 5-position
latching mode is active. The bottom LED illuminates.

2. Set point position 1 (start position) by turning the steering
rate knob. Press the bind button to save the position and
move to position 2. The bottom two LEDs illuminate.

3. Set point position 2 by turning the steering rate knob.
Power off the transmitter if only 2 positions are required,
or press the bind button to save the position and move to
position 3. The middle two LEDs illuminate.

4. Set point position 3 by turning the steering rate knob.
Power off the transmitter if only 3 positions are required,
or press the bind button to save the position and move to
position 4. The top two LEDs illuminate.

5. Set point position 4 by turning the steering rate knob.
Power off the transmitter if only 4 positions are required,
or press the bind button to save the position and move to
position 5. The top LED illuminates.

6. Set point position 5 by turning the steering rate knob. Press
the bind button to save the position. The transmitter powers
off, indicating the programming process is complete

Start the process over at any time prior to saving the low
point position by pressing either the A or B button.

Remember to return steering rate knob to the desired
position when the programming process is complete.

During normal operation, use the A and B buttons to scroll
through the channel positions.

• Pressing A moves up through the positions.

• Pressing B moves down through the positions.

The transmitter stores the last position when powered off.

Adjusting the LED Brightness

The transmitter LEDs have four possible brightness levels.
To change the brightness level:

1. Press and hold the power button to power the transmitter on.

2. While holding the power button, press the A button to
increase the brightness, or press the B button to decrease
the brightness. The SMART battery level LEDs show the
current brightness level.

3. Release the power button to save the brightness level and
activate RF.

The LED brightness will be stored when the transmitter is
powered off.

Factory Reset Mode

Resetting the transmitter to factory settings resets the AUX
channel mode, the AUX channel point positions and the
endpoints of the steering wheel and trigger.

To reset the transmitter to the factory settings, power on the
transmitter while holding the steering wheel to full left and
the trigger to full brake.

5SPEKTRUM DX3 USER GUIDE

EN

2.4GHZ TROUBLESHOOTING GUIDE

Problem Possible Cause Solution

Your transmitter and receiver are too close together Move transmitter 1 to 3 meters from receiver

The system will not
connect

The receiver goes into
failsafe mode a short
distance away from the
transmitter

The receiver quits
responding during
operation

You are around metal objects Move to an area with less metal

The model selected is not the model bound to

Your transmitter was accidentally put into bind
mode and is no longer bound to your receiver

Check the receiver antenna to be sure it is not
cut or damaged

Inadequate battery voltage

Loose or damaged wires or connectors
between battery and receiver

Check model selected and ensure you are bound
to that model

Rebind your transmitter and receiver

Replace the receiver or contact
Horizon Product Support

Make sure your receiver antenna is in an antenna
tube and is above the vehicle

Charge batteries. Spektrum receivers require at
least 3.5V to operate. An inadequate power supply
can allow voltage to momentarily drop below 3.5V
and cause the receiver to brown out and reconnect

Check the wires and connection between the battery
and receiver. Repair or replace wires and/or connectors

1 YEAR LIMITED WARRANTY

What this Warranty Covers

Horizon Hobby, LLC, (Horizon) warrants to the original purchaser
that the product purchased (the “Product”) will be free from
defects in materials and workmanship for a period of 1 year
from the date of purchase.

What is Not Covered

This warranty is not transferable and does not cover (i) cosmetic
damage, (ii) damage due to acts of God, accident, misuse,
abuse, negligence, commercial use, or due to improper use,
installation, operation or maintenance, (iii) modi cation of or to
any part of the Product, (iv) attempted service by anyone other
than a Horizon Hobby authorized service center, (v) Product not
purchased from an authorized Horizon dealer, (vi) Product not
compliant with applicable technical regulations, or (vii) use that
violates any applicable laws, rules, or regulations.
OTHER THAN THE EXPRESS WARRANTY ABOVE, HORIZON
MAKES NO OTHER WARRANTY OR REPRESENTATION, AND
HEREBY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES,
INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES
OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE PURCHASER ACKNOWLEDGES
THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT
WILL SUITABLY MEET THE REQUIREMENTS OF THE
PURCHASER’S INTENDED USE.

Purchaser’s Remedy

Horizon’s sole obligation and purchaser’s sole and exclusive
remedy shall be that Horizon will, at its option, either (i)
service, or (ii) replace, any Product determined by Horizon
to be defective. Horizon reserves the right to inspect any
and all Product(s) involved in a warranty claim. Service or
replacement decisions are at the sole discretion of Horizon.
Proof of purchase is required for all warranty claims. SERVICE
OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS
THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.

Limitation of Liability

HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR
PRODUCTION OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS
OF WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY,
TORT, NEGLIGENCE, STRICT LIABILITY OR ANY OTHER THEORY

6 SPEKTRUM DX3 USER GUIDE

OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. Further, in no event shall the
liability of Horizon exceed the individual price of the Product on
which liability is asserted. As Horizon has no control over use, setup,
 nal assembly, modi cation or misuse, no liability shall be assumed
nor accepted for any resulting damage or injury. By the act of use,
setup or assembly, the user accepts all resulting liability. If you as the
purchaser or user are not prepared to accept the liability associated
with the use of the Product, purchaser is advised to return the Product
immediately in new and unused condition to the place of purchase.

Law

These terms are governed by Illinois law (without regard to
con ict of law principals). This warranty gives you speci c
legal rights, and you may also have other rights which vary
from state to state. Horizon reserves the right to change or
modify this warranty at any time without notice.

WARRANTY SERVICES
Questions, Assistance, and Services

Your local hobby store and/or place of purchase cannot
provide warranty support or service. Once assembly, setup or
use of the Product has been started, you must contact your
local distributor or Horizon directly. This will enable Horizon to
better answer your questions and service you in the event that
you may need any assistance.
For questions or assistance, please visit our website at
www.horizonhobby.com, submit a Product Support Inquiry, or
call the toll free telephone number referenced in the Warranty
and Service Contact Information section to speak with a
Product Support representative.

Inspection or Services

If this Product needs to be inspected or serviced and is
compliant in the country you live and use the Product in,
please use the Horizon Online Service Request submission
process found on our website or call Horizon to obtain a
Return Merchandise Authorization (RMA) number. Pack the
Product securely using a shipping carton. Please note that
original boxes may be included, but are not designed to
withstand the rigors of shipping without additional protection.
Ship via a carrier that provides tracking and insurance for
lost or damaged parcels, as Horizon is not responsible for

merchandise until it arrives and is accepted at our facility.
An Online Service Request is available at http://www.
horizonhobby.com/content/service-center_render-service­center. If you do not have internet access, please contact
Horizon Product Support to obtain a RMA number along with
instructions for submitting your product for service. When
calling Horizon, you will be asked to provide your complete
name, street address, email address and phone number
where you can be reached during business hours. When
sending product into Horizon, please include your RMA
number, a list of the included items, and a brief summary
of the problem. A copy of your original sales receipt must
be included for warranty consideration. Be sure your name,
address, and RMA number are clearly written on the outside
of the shipping carton.

NOTICE: Do not ship LiPo batteries to Horizon. If you
have any issue with a LiPo battery, please contact the
appropriate Horizon Product Support office.

Warranty Requirements

For Warranty consideration, you must include your original
sales receipt verifying the proof-of-purchase date. Provided
warranty conditions have been met, your Product will be
serviced or replaced free of charge. Service or replacement
decisions are at the sole discretion of Horizon.

Non-Warranty Service

Should your service not be covered by warranty, service
will be completed and payment will be required without
noti cation or estimate of the expense unless the expense
exceeds 50% of the retail purchase cost. By submitting
the item for service you are agreeing to payment of the
service without noti cation. Service estimates are available
upon request. You must include this request with your item
submitted for service. Non-warranty service estimates will
be billed a minimum of ½ hour of labor. In addition you will
be billed for return freight. Horizon accepts money orders
and cashier’s checks, as well as Visa, MasterCard, American
Express, and Discover cards. By submitting any item to
Horizon for service, you are agreeing to Horizon’s Terms and
Conditions found on our website http://www.horizonhobby.
com/content/service-center_render-service-center.

ATTENTION: Horizon service is limited to Product
compliant in the country of use and ownership. If received,
a non-compliant Product will not be serviced. Further, the
sender will be responsible for arranging return shipment
of the un-serviced Product, through a carrier of the
sender’s choice and at the sender’s expense. Horizon will
hold non-compliant Product for a period of 60 days from
notification, after which it will be discarded.

WARRANTY, SERVICE AND CUSTOMER SERVICE CONTACT INFORMATION

Country of

Purchase

North America

European Union

Horizon Hobby Phone Number/Email Address Address

Horizon Service Center

(Repairs and Repair Requests)

Horizon Product Support

(Product Technical Assistance)

Sales

Horizon Technischer Service [e-mail]
Sales: Horizon Hobby GmbH [phone]

servicecenter.horizonhobby.com/

RequestForm/

[e-mail]

877-504-0233

[e-mail]

800-338-4639

Champaign, Illinois, 61822 USA

D 22885 Barsbüttel, Germany

2904 Research Rd

Hanskampring 9

EN

10/2015

7SPEKTRUM DX3 USER GUIDE

EN

FCC INFORMATION

Contains FCC ID: BRWKATY1T

This device complies with part 15 of the FCC rules. Operation
is subject to the following two conditions: (1) This device
may not cause harmful interference, and (2) this device must
accept any interference received, including interference that
may cause undesired operation.

CAUTION: Changes or modifications not expressly
approved by the party responsible for compliance

could void the user’s authority to operate the equipment.

This product contains a radio transmitter with wireless
technology which has been tested and found to be compliant
with the applicable regulations governing a radio transmitter
in the 2.400GHz to 2.4835GHz frequency range.

Supplier’s Declaration of Conformity

Spektrum DX3 Transmitter with SR315 receiver (SPM2340)

This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions:

(1) This device may not cause harmful interference,
and (2) this device must accept any interference received,
including interference that may cause undesired operation.

CAUTION: Changes or modifications not expressly
approved by the party responsible for compliance

could void the user’s authority to operate the equipment.

BRWSRIRVINGV1

NOTE: This equipment has been tested and found to

comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause
harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more
of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician
for help.

Horizon Hobby, LLC
2904 Research Rd.,
Champaign, IL 61822
Email: [e-mail]
Web: HorizonHobby.com

IC INFORMATION

IC: 6157A-KATY1T

6157A-SRIRVINGV

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.

COMPLIANCE INFORMATION FOR THE EUROPEAN UNION

Horizon Hobby, LLC hereby declares that this product is in compliance with the essential requirements and other
relevant provisions of the RED Directive.
A copy of the EU Declaration of Conformity is available online at:
http://www.horizonhobby.com/content/support-render-compliance.

Frequency Band: 2402.0-2478.0 MHz
Max EIRP: 17.5 dBm

Instructions for Disposal of WEEE by Users in the European Union

8 SPEKTRUM DX3 USER GUIDE

This product must not be disposed of with other waste. Instead, it is the user’sresponsibility to dispose of their
waste equipment by handing it over to adesignated collection point for the recycling of waste electrical and
electronic equipment. The separate collection and recycling of your waste equipment at the time of disposal will
help to conserve natural resources and ensure that it is recycled in amanner that protects human health and the
environment. For more information about where you can drop off your waste equipment for recycling, please
contact your local city office, your household waste disposal service or where you purchased the product.

DSM, DSM2, DSMR, DX3, AVC, Acitve Vehicle Control and the Horizon Hobby logo

are trademarks or registered trademarks of Horizon Hobby, LLC.

The Spektrum trademark is used with permission of Bachmann Industries, Inc.

All other trademarks, service marks and logos are property of their respective owners.

Created: 12/2019 SPM2340 60062.1

© 2020 Horizon Hobby, LLC.

US 9,320,977. US 9,930,567. US 10,419,970.