1. Introduction
This manual provides essential information for the safe and effective operation of your Hotrc HT-8A or HT-10A 2.4G 8-channel FHSS remote control transmitter and F-08A receiver. This system is designed for controlling various remote-controlled models, including aircraft, cars, ships, and tanks. Please read this manual thoroughly before use to ensure proper setup and operation.
Hotrc HT-8A transmitter paired with an F-08A receiver, illustrating a typical package.
2. Safety Information
- Antenna Handling: During use, it is strictly forbidden to grip the transmitter antenna. Doing so can reduce the quality and strength of the wireless signal, potentially causing the remote control and the model to lose control.
- Line of Sight Operation: The 2.4GHz radio band operates differently from older low-frequency bands. Always ensure that your model product is flying or operating within your direct line of sight.
- California Proposition 65 Warning: ⚠ WARNING: This product can expose you to chemicals including phthalates (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
3. Product Overview
3.1 Transmitter (HT-8A / HT-10A)
The Hotrc transmitter features an ergonomic design with an intuitive LCD display for real-time status monitoring. It includes various controls for precise model manipulation.
Labeled diagram of the Hotrc HT-8A transmitter controls and features.
- Antenna Position: For optimal signal transmission.
- Channels (5CH, 6CH, 7CH, 8CH): Auxiliary channels for additional functions.
- Pilot Lamp: Status indicator.
- Power Switch: To turn the transmitter on/off.
- Direction Levers: Main control sticks for movement.
- Fine Tuning Buttons (1-4): For precise adjustments of control surfaces.
- Mixed Control Button: Activates mixed control functions.
- Positive and Negative Channels: For setting channel direction.
- Large and Small Rudder Buttons: For adjusting rudder sensitivity.
- Lock Button: For locking specific functions.
- LCD Display Screen: Provides a humanized and intuitive view of the remote control status.
3.2 Receiver (F-08A)
The F-08A receiver is designed to work seamlessly with the HT-8A/HT-10A transmitters, providing reliable signal reception.
Hotrc F-08A receiver with dual antennas and PWM ports.
- PWM Ports (1-8): For connecting servos and other components.
- BIND Button: Used for pairing the receiver with the transmitter.
- EXT-V Port: For external voltage return, enabling voltage monitoring.
Note on F-08A Receiver Version: The F-08A receiver factory has released a new version. Their functions are the same, with dual antennas replaced by single antennas and changes in appearance. We will ship them randomly. Please accept it, if you do not accept, please do not place an order. We do not accept return appeals due to antenna and appearance issues.
Image showing the new version of the F-08A receiver with a single antenna.
4. Specifications
The following table details the technical specifications for the Hotrc HT-8A/HT-10A transmitter and F-08A receiver system:
Table detailing Production Information and Specifications.
| Feature | Specification |
|---|---|
| Suitable Type | Model aircraft / Model car/ship /tank |
| Number of Channels | 8 |
| Remote Control Net Weight | Approximately 304g |
| Remote Control Distance | About 300m on the ground, 800m in the air |
| Transmit Power | ≈ 90mW |
| Modulation Mode | GFSK |
| Spread Spectrum | FHSS |
| Response Speed | PWM: ≤20ms |
| Frequency Range | 2.4GHz ISM band (2.4005-2.483.5GHz) |
| Receiving Sensitivity | <- 97dbm |
| Receiver Power Supply Range | DC4V-9V |
| Transmitter Power Supply Range | DC4.5V-9V |
| Material | Plastic (PC) |
| Recommended Age | 14+ years |
5. Setup
5.1 Battery Installation (Transmitter)
The transmitter supports direct insertion of a 7.4V lithium battery. Locate the battery compartment on the back of the transmitter and connect the battery to the reserved socket.
Detailed view of the LCD display and lithium battery installation slot on the transmitter.
5.2 Receiver Binding
To establish communication between the transmitter and receiver, they must be bound. Refer to the receiver diagram to locate the BIND button.
Diagram detailing the F-08A receiver's ports, including bind button and return function socket.
Binding Procedure (General):
- Ensure both transmitter and receiver are powered off.
- Connect a bind plug (if required, usually included with receiver) to the BIND port on the receiver.
- Power on the receiver. The receiver's LED should flash, indicating it's in binding mode.
- While holding the bind button on the transmitter (if applicable, or follow specific transmitter binding instructions), power on the transmitter.
- The receiver's LED should turn solid, indicating successful binding.
- Power off both the receiver and transmitter. Remove the bind plug from the receiver.
- Power on the transmitter first, then the receiver. They should now be linked.
5.3 Wiring Diagram (Receiver)
Connect your model's components (e.g., ESC, servos) to the appropriate PWM ports on the receiver. The EXT-V port can be used for voltage feedback if your model supports it.
Wiring diagram for connecting an F-10A receiver to a battery and ESC, including feedback line. (F-08A wiring is similar).
6. Operating Instructions
Diagram illustrating the Eight Major Functions of the remote control system.
6.1 Basic Controls
- Direction Levers (Joysticks): Control the primary movements of your model (e.g., throttle, steering, aileron, elevator).
- Fine Tuning Buttons: Use these buttons to make small, precise adjustments to the neutral position of your control surfaces.
6.2 Advanced Functions
- Mixed Control Function: Supports 1/2 CH and 2/4 CH mixed control for complex maneuvers.
- Adjustment of Rudder Quantity: Allows setting the rudder quantity for 1CH, 2CH, and 4CH.
- Channel Positive and Negative: Configure front and back settings for 1CH, 2CH, 3CH, and 4CH.
- Return Channel: Provides voltage return signal feedback.
- Locking Function: Keys can be locked to prevent accidental input.
6.3 Safety Features
- Out of Control Protection: If the signal is lost, the throttle will automatically run to its lowest value to prevent runaway models.
- Automatic Shutdown: The transmitter will automatically shut down after 15 minutes of no operation to conserve battery.
- Throttle Alarm: An alarm will sound if the throttle lever is not at its lowest value when starting the transmitter, ensuring safe power-up.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the transmitter and receiver. Avoid using solvents or harsh chemicals.
- Storage: Store the remote control system in a cool, dry place away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods.
- Battery Care: Ensure batteries are charged according to manufacturer guidelines. Do not overcharge or deep discharge lithium batteries.
8. Troubleshooting
- Loss of Control / Intermittent Signal:
• Ensure the transmitter antenna is not obstructed or gripped during operation.
• Operate the model within the specified remote control distance and line of sight.
• Check both transmitter and receiver battery levels. Low voltage can cause signal issues.
• Re-bind the receiver to the transmitter if connection is lost. - Throttle Alarm Sounds on Startup:
• This indicates the throttle lever is not at its lowest position. Move the throttle stick all the way down before powering on the transmitter. - Model Does Not Respond:
• Verify that the transmitter and receiver are correctly bound.
• Check all wiring connections between the receiver, ESC, and servos.
• Ensure all batteries are charged and correctly installed. - Automatic Shutdown:
• The transmitter will shut down after 15 minutes of inactivity. This is a normal power-saving feature. Simply power it back on to resume use.
9. User Tips
- Pre-Flight Checks: Always perform a thorough range check before flying or operating your model to ensure reliable signal strength.
- Battery Management: Ensure all batteries (transmitter and model) are fully charged before each use. Carry spare batteries if possible.
- Familiarization: Practice with the controls and functions in a safe, open environment without your model powered on until you are comfortable with its operation.
- Environmental Awareness: Be mindful of other 2.4GHz devices in the area that might cause interference, although FHSS technology minimizes this risk.
10. Compliance
This product complies with relevant industry standards. For specific compliance details, please refer to the product packaging or contact customer support.
FCC ID: CE 0678 (as indicated on product images)
11. Warranty and Support
For technical assistance, warranty claims, or further inquiries regarding your Hotrc remote control system, please contact the retailer where you purchased the product or refer to the official Hotrc website for support information.
