1. Introduction
The RUSHFPV 1.3G 4W V2 VTX is a high-performance, switchable video transmitter module designed for use in RC FPV (First Person View) freestyle quadcopters and airplanes. This module provides robust and stable image transmission, making it ideal for long-range flights and demanding FPV applications. With its efficient power calibration and advanced heat dissipation, it ensures consistent performance across all channels.
2. Key Features
- Designed for long-range flights, offering up to 4W transmitting power.
- Multi-level power adjustment for versatile use.
- Efficient PA (Power Amplifier) and power calibration ensure consistent power output across all channels.
- Customized digital PLL (Phase-Locked Loop) circuit with chip-level integration prevents frequency drift.
- Built-in bandpass filter reduces harmonic interference, protecting navigation equipment.
- Durable aluminum alloy three-layer shell structure.
- Large centrifugal fan provides sufficient heat dissipation for stable transmitting power output.
3. Specifications
3.1 General Characteristics
| Characteristic | Value | Characteristic | Value |
|---|---|---|---|
| Frequency band | 1080-1360MHz | Frequency precision | ±200KHz (Typ.) |
| Channel customer | 16 | S/N (For ±3MHz) | >70dBc |
| Modulation type | FM | Antenna Port | SMA 50 Ohms |
| Frequency control | PLL | Video input level | 1V±0.2Vp-p (typ.) |
3.2 Dimensions and Weight
- Module Dimensions: Approximately 28.6mm (W) x 44mm (L) x 14.7mm (H)
- Module Weight: 44.2g (excluding antenna and wiring)
Figure 1: VTX Module Dimensions and General Characteristics
Figure 2: VTX Module Weight (44.2g)
3.3 Transmitter Antenna Specifications
| Characteristic | Value | Characteristic | Value |
|---|---|---|---|
| Polarization | RHCP | Gain | 1.7dBi |
| Bandwidth | 1200-1300MHz | V.S.W.R | <1.5 |
| Radiation pattern | Omni-directional | Cable | RG402-SMA |
Figure 3: Transmitter Antenna Dimensions and Specifications
4. Package Contents
The package typically includes:
- 1x RUSHFPV 1.3G 4W V2 VTX Transmitter Module
- 1x Transmitter Antenna (RHCP)
- 1x Wiring Harness
Figure 4: RUSHFPV 1.3G 4W V2 VTX Transmitter Module with Antenna and Wiring Harness
5. Setup and Installation
5.1 Important Safety Warning
WARNING: The antenna MUST be connected to the VTX module before powering on the device. Failure to do so will result in permanent damage to the product.
5.2 Wiring Diagram
Connect the VTX module to your flight controller or power source using the provided wiring harness as shown in the diagram below. Ensure correct polarity for power connections (DC-IN and GND).
- DC-IN: Power input (7-30V, Lipo-N compatible)
- GND: Ground connection
- DATA: Data line for flight controller communication (IRC Trump protocol)
- VIDEO: Video signal input
Figure 5: VTX Wiring Diagram and Button/LED Layout
5.3 Physical Installation
- Mount the VTX module reliably within your RC model, ensuring it is secure and protected from excessive vibration.
- Avoid mounting the VTX in locations prone to high temperatures, as proper airflow is crucial for optimal performance and longevity. The module has a built-in power filter, but it is still recommended to avoid excessive power supply interference.
- For flight controller integration, connect the DATA pin and configure your flight controller to use the IRC Trump protocol for VTX control.
6. Operating Instructions
The VTX module is controlled using a single button and provides visual feedback through an RGB LED.
6.1 LED Indicators
- RGB LED: Used for general lighting.
- Blue LED: Indicates the selected band.
- Red LED: Indicates the selected channel.
- Green LED: Indicates the power level.
6.2 VTX Status and Settings
When there is no operation, the RGB LED blinks cyclically. The number of times the RGB blinks represents the current VTX status. When the green LED is always on, the VTX is in PITMODE.
To enter VTX settings:
- Long press the button to enter VTX setting mode. The RGB lights will be lit alternately.
- Release the button under the corresponding color light to enter the specific function setting (e.g., release when Blue LED is lit to set band).
- Short press the button to adjust the value within the selected setting.
6.3 Channel and Power Configuration
The following table details the available channels and power levels for Band A and Band B, including PIT mode settings:
| Mode/Band | Channel 1 | Channel 2 | Channel 3 | Channel 4 | Channel 5 | Channel 6 | Channel 7 | Channel 8 |
|---|---|---|---|---|---|---|---|---|
| PIT Mode | 25mW (Green LED always ON) | |||||||
| Band A (Blue LED) | 1080MHz | 1120MHz | 1160MHz | 1200MHz | 1240MHz | 1280MHz | 1320MHz | 1360MHz |
| Band B (Red LED) | 1200MHz | 1220MHz | 1240MHz | 1258MHz | 1280MHz | 1300MHz | 1320MHz | 1340MHz |
| Power Levels (W) | 0.025W | 0.2W | 0.5W | 1W | 2W | 3W | 4W | |
Figure 6: Detailed VTX Button and LED Settings
7. Maintenance
- Cleaning: Gently clean the VTX module and fan with a soft, dry brush or compressed air to remove dust and debris. Avoid using liquids or solvents.
- Storage: Store the VTX module in a cool, dry place away from direct sunlight and extreme temperatures.
- Inspection: Periodically inspect the wiring harness for any signs of wear, fraying, or damage. Ensure all connections are secure.
- Antenna Care: Handle the antenna with care. Avoid bending or stressing the SMA connector.
8. Troubleshooting
8.1 No Video Signal
- Ensure the antenna is securely connected to the VTX module.
- Verify that the VTX is receiving power (check power connections and voltage).
- Confirm that your FPV receiver is on the correct frequency and band as the VTX.
- Check the video input connection from your camera to the VTX.
8.2 Poor Video Quality / Interference
- Ensure the VTX and antenna are mounted away from other electronic components that might cause interference (e.g., ESCs, motors).
- Check for loose antenna connections.
- Verify that the VTX power output is set appropriately for your flight environment. Higher power can sometimes cause more interference if not properly filtered.
- Ensure your power source is clean and free from excessive noise.
- Check for physical damage to the antenna or VTX module.
8.3 VTX Overheating
- Ensure adequate airflow around the VTX module. The built-in fan requires proper ventilation.
- Avoid running the VTX at maximum power for extended periods in enclosed spaces without sufficient cooling.
- Verify that the input voltage is within the specified range (7-30V). Incorrect voltage can lead to excessive heat.
9. User Tips
- Always double-check your antenna connection before powering on to prevent VTX damage.
- For optimal long-range performance, ensure your antenna is clear of obstructions and oriented correctly.
- Utilize the PIT mode for testing and setup to avoid interfering with other FPV pilots.
- When flying with others, coordinate channel usage to prevent signal overlap and interference.
10. Warranty and Support
This RUSHFPV product is manufactured by Aoft Technology. For warranty claims, technical support, or service inquiries, please contact your original retailer or the manufacturer directly. Please retain your proof of purchase for warranty validation.
For the latest information and support resources, please refer to the official RUSHFPV or Aoft Technology website.