User Guide for Spektrum SLT3 Transmitter

Quick guide from the manual

The Spektrum SLT3 is a 2.4GHz digital radio system designed for hobby-grade, remote-controlled vehicles. This guide covers the essential setup, including battery installation, binding the receiver, and adjusting servo travel. Always ensure your batteries are charged and the receiver antenna is correctly positioned (not in the shadow of metal or carbon fiber) before operation.

Transmitter Functions

The SLT3 transmitter features several controls for fine-tuning your vehicle:

• Steering Trim (B): Adjusts the steering center point.
• Throttle Trim (A): Adjusts the throttle neutral point.
• Steering Rate (F): On-the-fly knob for travel adjustment.
• Throttle Limit (H): Limits output to 50%, 75%, or 100%.
• Servo Reversing (I, J): Switches to reverse throttle or steering channels.
• LED (C): Solid red indicates power ON; flashing red indicates low battery.

Installing the Transmitter Batteries

1. Remove the battery cover from the transmitter.
2. Install 4 AA batteries, ensuring correct polarity as shown in the diagram.
3. Replace the battery cover.

Caution: Do not charge non-rechargeable batteries. Use only the correct battery type to avoid explosion risks.

Binding the Receiver

Binding programs the receiver to recognize the specific transmitter.

1. Press and hold the bind button on the receiver, then power ON the receiver. The orange LED will flash.
2. Set trims and control positions to desired failsafe settings.
3. Power ON the SLT3 transmitter.
4. When the orange LED on the receiver remains lit, the connection is established.

You must rebind if you change failsafe positions or bind to a different transmitter.

Servo Travel Adjustment

You can adjust the steering and throttle travel limits:

1. Complete the binding process and power ON the receiver.
2. Hold full right and full brake while powering the transmitter ON. The LED will flash 4 times to indicate programming mode.
3. Turn the wheel full left to set the limit for that direction. Use the A button to increase travel or the B button to reduce it.
4. Return the wheel to center to set the value.
5. Repeat the process for the right side.
6. Power the transmitter OFF to save settings.

Factory Reset

To reset servo travel and calibration:

1. Hold full left and full brake while powering the transmitter ON. The LED will flash 4 times and then turn OFF.
2. Release the wheel and throttle trigger to neutral; the LED will illuminate.
3. Power the transmitter OFF.

Troubleshooting

If the system fails to connect, ensure the transmitter and receiver are 1 to 3 meters apart and away from metal objects. If the receiver loses connection or enters failsafe mode, check that the antenna is not cut or damaged and is positioned in an antenna tube above the vehicle. Ensure the power supply is at least 3.5V.