Spektrum DX3 Smart 3-Channel Transmitter with SR315 Receiver Instruction Manual

Introduction

The Spektrum DX3 Smart 3-Channel Transmitter, paired with the SR315 Receiver, offers a reliable radio system utilizing exclusive Spektrum DSMR technology for superior range, response, and interference resistance. This system also integrates innovative Spektrum Smart Technology, providing convenient features for enhanced control and monitoring of your RC vehicle.

Important Safety Information

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 use with incompatible components or alter this product in any way outside of the instructions provided by Horizon Hobby, LLC. The product 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.

Product Features

• DSMR Technology for superior range, response, and interference resistance.
• 3-Channel operation (Steering, Throttle, AUX1) for versatile control.
• Smart Technology ready with the included SR315 receiver for advanced telemetry.
• Foam-covered steering wheel for improved grip and control.
• Convenient voltage level indicator for Smart batteries.

Image: The Spektrum DX3 Smart 3-Channel Transmitter shown alongside the SR315 Receiver.

Setup

1. Transmitter Battery Installation

1. Locate the battery compartment on the underside of the DX3 transmitter.
2. Open the battery compartment cover.
3. Insert four (4) AA batteries, ensuring correct polarity as indicated inside the compartment.
4. Close the battery compartment cover securely.

2. Receiver Installation (SR315)

1. Mount the SR315 receiver securely in your RC vehicle, away from any potential interference sources like motors or ESCs.
2. Connect the steering servo to the "STR" port on the receiver.
3. Connect the Electronic Speed Controller (ESC) to the "THR" port on the receiver.
4. If applicable, connect any auxiliary components (e.g., lights, winches) to the "AUX1" port.
5. Ensure all connections are firm and correctly oriented.

3. Binding the Transmitter and Receiver

Binding is the process of linking the transmitter and receiver. This must be done for the first use and if the receiver is replaced.

1. Ensure the transmitter is OFF.
2. Insert the bind plug into the "BIND" port on the SR315 receiver.
3. Power on the RC vehicle (which powers the receiver). The receiver's LED will flash rapidly, indicating it's in bind mode.
4. While holding down the "BIND" button on the DX3 transmitter, power on the transmitter.
5. Release the "BIND" button on the transmitter once its LED starts flashing.
6. The receiver's LED should turn solid, indicating a successful bind.
7. Power off the vehicle and then the transmitter. Remove the bind plug from the receiver.
8. Power on the transmitter first, then the vehicle, to confirm the bind.

Operating Instructions

Transmitter Controls Overview

Image: Top view of the Spektrum DX3 transmitter, highlighting the control panel with Smart Battery Level indicators, throttle limit switch, and trim knobs.

• Steering Wheel: Controls the direction of the vehicle. Turn left or right.
• Throttle Trigger: Controls the speed and direction (forward/reverse) of the vehicle. Pull for forward, push for reverse/brake.
• ST Trim (Steering Trim): Adjusts the neutral position of the steering servo. Use to make the vehicle drive straight when the steering wheel is centered.
• TH Trim (Throttle Trim): Adjusts the neutral position of the throttle. Use to prevent the vehicle from moving when the throttle trigger is centered.
• Brake Rate: Adjusts the braking intensity.
• ST Rate (Steering Rate): Adjusts the maximum steering angle.
• TH Limit (Throttle Limit): A 3-position switch (50/75/100) to limit the maximum throttle output, useful for beginners or in confined spaces.
• Smart Battery Level Indicator: LEDs on the transmitter indicate the approximate charge level of a connected Spektrum Smart battery in the vehicle.
• Power Button: Turns the transmitter ON/OFF.

Advanced Telemetry with Spektrum Dashboard App

The DX3 transmitter, when used with a Spektrum Smart battery and an optional Bluetooth module (sold separately), can provide real-time telemetry data to your smartphone via the Spektrum Dashboard App. This allows monitoring of:

• Speed
• RPM
• Temperature
• Top Speed
• Battery Voltage
• And other Smart Connectivity data.

Maintenance

• Cleaning: Use a soft, dry cloth to clean the transmitter and receiver. Avoid using solvents or harsh chemicals.
• Storage: Store the transmitter and receiver in a cool, dry place when not in use. Remove batteries from the transmitter if storing for extended periods.
• Inspection: Regularly inspect all wires and connections for damage or wear. Ensure the antenna on the receiver is not cut or damaged.

Troubleshooting

Specifications

Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the official Spektrum or Horizon Hobby website. Keep your proof of purchase for warranty claims.

• Manufacturer: Horizon Hobby
• Online Support: Visit the Spektrum Store on Amazon for additional product information and resources.