1. Introduction
The HPXGRC 1W 64-Bit FPV VTX is a high-performance 5.8GHz video transmitter designed for First Person View (FPV) applications in RC drones. It features a powerful 1W output for stable signal transmission and strong penetration, supporting 64 working channels with button selection settings and IRC Tramp protocol for flexible configuration.
2. Specifications
| Feature | Specification |
|---|---|
| Model | HPXGRC VTX 5.8G1W |
| Frequency Band | 4.9 – 5.9 GHz |
| Input Voltage | DC 12-52V (3-12S BAT) |
| Output Voltage | 5V@1A |
| Output Power | 1W |
| Protocol | IRC Tramp |
| Weight | 3.2g |
| Size | 24.95 x 24.9 x 2 mm |
| Working Channels | 64 (button selection settings) |
| Material | Composite Material |
| For Vehicle Type | Airplanes (RC Drones) |
| Recommended Age | 14+ years |
Figure 1: HPXGRC VTX with dimensions and weight.
3. Package Contents
Please check the package for the following items:
- HPXGRC VTX 5.8G (1 unit)
- Double plug cord (1 unit)
- Single plug cord (1 unit)
Figure 2: Package contents including the VTX and connecting cables.
4. Setup and Installation
4.1 Physical Installation
The HPXGRC VTX is compact, measuring 24.95 x 24.9 x 2 mm and weighing 3.2g, making it suitable for various RC drone frames. Mount the VTX securely to your drone frame, ensuring it is protected from vibrations and potential crash damage. Consider its orientation for optimal antenna placement and cooling.
Figure 3: VTX size comparison (held in hand).
4.2 Wiring Connections (JST)
Carefully connect the VTX to your flight controller and power source using the provided JST cables. Refer to the wiring diagram below for correct connections. Ensure all connections are firm and correctly polarized to prevent damage.
Figure 4: JST Connection Diagram and Important Warnings.
Warning:
- Please install the antenna before use. Powering on the VTX without an antenna can cause permanent damage.
- To prevent overheating, ensure continuous air circulation and maintain a well-ventilated environment. If used in a confined space, ensure proper cooling.
- The 5V output is exclusively for cameras and cooling fans. Never connect the power input or battery to the 5V output port, as this may damage the aircraft.
4.3 Antenna Installation
Before applying power to the VTX, always ensure that a compatible 5.8GHz antenna is securely connected to the VTX's antenna port. Failure to do so will result in immediate and irreversible damage to the VTX module.
5. Operating Instructions
5.1 Powering On
Once the VTX is correctly wired and the antenna is installed, connect your drone's battery (3-12S BAT, DC 12-52V). The VTX will power on automatically.
5.2 Channel and Power Settings
The HPXGRC VTX supports 64 working channels and 1W output power. Settings can be configured via button selection on the VTX itself or through software debugging using the IRC Tramp protocol.
For software configuration, connect your flight controller to a computer and use compatible FPV firmware configurator software (e.g., Betaflight, INAV). Navigate to the Video Transmitter (VTX) tab to adjust frequency band, channel, and power levels. The VTX table in the software allows for precise control over these parameters.
Figure 5: Software Debugging Diagram for VTX Configuration.
Ensure that the selected channel and power output comply with local regulations.
6. Maintenance
- Cooling: Always ensure the VTX has adequate airflow, especially when operating at higher power outputs (1W). Overheating can significantly reduce the lifespan and performance of the VTX. Avoid enclosing the VTX in tight spaces without ventilation.
- Cleaning: Keep the VTX free from dust, dirt, and moisture. Use a soft, dry brush or compressed air to clean the board if necessary. Avoid using liquids.
- Physical Inspection: Regularly check for loose connections, damaged wires, or physical damage to the VTX board and antenna connector.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No video signal | Antenna not connected, incorrect wiring, VTX not powered, incorrect channel/band. | Ensure antenna is securely attached. Check all wiring connections. Verify VTX is receiving power. Confirm correct channel/band settings on VTX and FPV receiver. |
| Poor video quality/static | Interference, weak signal, damaged antenna, VTX overheating. | Change VTX channel/band to avoid interference. Ensure VTX has clear line of sight. Check antenna for damage. Improve VTX cooling. |
| VTX gets excessively hot | Insufficient cooling, operating without antenna. | Ensure adequate airflow around the VTX. NEVER power on without an antenna. Reduce output power if not needed. |
| Cannot change settings via software | Incorrect protocol selected, wiring issue to flight controller. | Verify IRC Tramp protocol is selected in flight controller software. Check UART wiring between VTX and flight controller. |
8. User Tips
- Antenna First: Always attach your antenna before connecting power to the VTX. This is the most common cause of VTX failure.
- Cooling is Key: High-power VTX units generate significant heat. Ensure your VTX is mounted in a location with good airflow to prevent thermal throttling and damage.
- Check Your Channels: Before flying, always double-check that your VTX and FPV goggles are on the same channel and band to avoid signal issues.
- Power Output Management: Use the lowest effective power output for your flying environment. Higher power generates more heat and can cause interference with other pilots.
9. Warranty and Support
For warranty claims, technical support, or further assistance, please contact the retailer or manufacturer directly. Keep your proof of purchase for any warranty-related inquiries.