1. Introduction
This manual provides detailed instructions for the RUSHFPV 3.3GHz 4W Video Transmitter (VTX) and the 3.3GHz Glasses Video Receiver (VRX) Module. These components are designed for FPV (First Person View) long-range drone applications, offering robust video transmission and reception capabilities. Please read this manual thoroughly before installation and operation to ensure optimal performance and safety.
2. Safety Information
- Antenna Connection: Always ensure the antenna is securely connected to the VTX before powering on the device. Operating the VTX without an antenna can cause permanent damage to the unit.
- Mounting: Mount the product reliably, avoiding excessive vibration and high temperatures. Proper mounting helps maintain stable operation and prevents damage.
- Power Supply: The VTX has a built-in power filter, but it is still crucial to avoid excessive power supply interference to prevent performance issues or damage.
- Voltage Range: Ensure the power supply voltage for the VTX is within the specified 7-30V DC range. For the VRX module, ensure a 5V DC input. Incorrect voltage can damage the devices.
3. Package Contents
The package typically includes the following items:
- RUSHFPV 3.3GHz 4W Video Transmitter (VTX)
- RUSHFPV 3.3GHz Glasses Video Receiver (VRX) Module
- Transmitter Antenna (RHCP, RG402-SMA cable)
- Connecting Cables (as required for VTX/VRX)
4. Specifications
4.1. 3.3GHz 4W Video Transmitter (VTX)
Features:
- Designed for long-range flights with up to 4W transmitting power.
- Provides multi-level power adjustment.
- Efficient PA and power calibration ensure consistent power across all channels.
- Customized digital PLL circuit with chip-level integration prevents frequency drift.
- Aluminum alloy three-layer shell structure and large centrifugal fan provide sufficient heat dissipation for stable output.
General Characteristics:
| Parameter | Value |
|---|---|
| Frequency band | 3170-3470MHz |
| Frequency precision | ±200KHz (Typ.) |
| Channel count | 16 |
| S/N (For ±3MHz) | >55dBc |
| Modulation type | FM |
| Antenna Port | SMA 50 Ohms |
| Frequency control | PLL |
| Video input level | 1V±0.2Vp-p (typ.) |
| Frequency stability | ±100KHz (Typ.) |
| Operating Temperature | -10℃ to +70℃ |
| Power Supply | DC 7-30V |
| Control Protocol | IRC Tramp |
RF Output Power Levels:
| Power Level | 0 (PIT) | 1 (25mW) | 2 (200mW) | 3 (1W) | 4 (4W) |
|---|---|---|---|---|---|
| Min. | -30dBm | 12dBm | 21dBm | 29dBm | 35.5dBm |
| Typ. | -28dBm | 14dBm | 23dBm | 30dBm | 36dBm |
| Max. | -26dBm | 15dBm | 25dBm | 31dBm | 36.5dBm |
| Current @12V | 160mA | 270mA | 550mA | 880mA | 1400mA |
Transmitter Antenna Specifications:
| Parameter | Value |
|---|---|
| Polarization | RHCP |
| Gain | 1.85 dBi |
| Bandwidth | 3170-3470MHz |
| V.S.W.R | <1.9 |
| Radiation pattern | Omni-directional |
| Cable | RG402-SMA |
4.2. 3.3GHz Glasses VRX Module
Features:
- Compact unit design with aluminum alloy housing for flush mounting in mainstream video glasses.
- High-performance RF circuitry with full-range sensitivity below -95dBm.
- Supports 3.3GHz BAND A and B, providing operating frequencies from 3170-3470MHz.
- Built-in digital tube displays current operating status.
Specifications:
| Parameter | Value |
|---|---|
| Video Output format | CVBS PAL / NTSC |
| Frequency band | 3170-3470MHz |
| Channel Frequency (BAND A) | 3330, 3350, 3370, 3390, 3410, 3430, 3450, 3470 |
| Channel Frequency (BAND B) | 3170, 3190, 3210, 3230, 3250, 3270, 3290, 3310 |
| Receiving Sensitivity | ≤-95dBm |
| Input Voltage | DC 5V |
| Operating Temp. | -10℃ to +60℃ |
| Operating humidity | 85% RH |
| Dimension | 42mm x 25mm x 26mm |
| Weight | 9.5g (VRX Only) |
5. Setup
5.1. VTX Wiring and Installation
- Antenna Connection: Before applying power, connect the provided antenna to the SMA connector on the VTX. Failure to do so will damage the VTX.
- Power Connection: Connect the VTX to a DC power source within the 7-30V range using the Lipo-IN port.
- Video Input: Connect your FPV camera's video output to the 'VIDEO' pin on the VTX.
- Ground Connection: Ensure a common ground ('GND') connection between the VTX, camera, and flight controller.
- Data Connection (Optional): For flight controller setup and IRC Tramp protocol control, connect the 'DATA' pin on the VTX to the appropriate UART TX pad on your flight controller.
- Mounting: Securely mount the VTX on your drone, ensuring it is protected from vibration and has adequate airflow to prevent overheating.
5.2. VRX Module Installation
- Mounting: The VRX module is designed for flush mounting in compatible FPV video glasses. Carefully integrate it into your glasses according to the glasses' instructions.
- Power Connection: Connect the VRX module to a stable 5V DC power source.
- Video Output: Connect the 'VIDEO' pin of the VRX module to the video input of your FPV glasses.
- Ground Connection: Ensure a common ground ('GND') connection.
6. Operating Instructions
6.1. VTX Operation and Settings
The VTX is controlled using a single button, which integrates RGB lighting to indicate status:
- RGB Lighting: Blue indicates the selected band, Red indicates the channel, and Green indicates the power level.
- Status Indication: When there is no operation, the RGB LED blinks cyclically. The number of blinks corresponds to the current VTX status. If the green LED is continuously on, the VTX is in PITMODE.
- Entering Settings: Long press the button to enter VTX settings. The RGB lights will illuminate alternately.
- Adjusting Values: Release the button when the desired color light is active to enter that function's setting. Short press the button to adjust the value (e.g., change band, channel, or power level).
- Flight Controller Setup: For advanced setup and control via a flight controller, connect the DATA pin and utilize the IRC Tramp protocol.
6.2. VRX Module Operation and Settings
The VRX module features a built-in digital tube display for current operating status and is controlled via a single button:
- Channel Selection: Short press the 'SET' button to cycle through channels 1-8. The digital tube will display the current channel number.
- Band Selection: Long press the 'SET' button to switch between Band A and Band B. A decimal point on the display indicates Band A (decimal point off) or Band B (decimal point on).
7. Maintenance
- Cleaning: Keep the modules clean and free from dust and debris. Use a soft, dry cloth for cleaning. Avoid using liquids or solvents.
- Heat Management: Ensure proper airflow around the VTX, especially during high-power operation, to prevent overheating. Regularly check the centrifugal fan for obstructions.
- Antenna Care: Inspect the antenna and its connector regularly for any signs of damage. A damaged antenna can significantly reduce performance and potentially harm the VTX.
- Storage: Store the modules in a dry, cool environment away from direct sunlight and extreme temperatures when not in use.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No video signal | Antenna not connected or damaged; Incorrect VTX/VRX channel/band; Power issue; Damaged video cable. | Ensure antenna is connected; Verify VTX and VRX are on the same channel and band; Check power connections and voltage; Inspect video cables for damage. |
| Poor video quality/short range | Interference; Low VTX power; Damaged antenna; Obstructions. | Change VTX channel/band; Increase VTX power output; Replace antenna; Ensure clear line of sight. |
| VTX overheating | Insufficient cooling; High power output in confined space. | Ensure adequate airflow; Reduce power output if not needed; Check fan for obstructions. |
| VRX display not working | No power; Module damaged. | Check 5V power connection; If still not working, the module may be faulty. |
9. User Tips
- Power Output Management: For shorter range flights or when flying with others, consider using lower power settings (e.g., 200mW or 1W) to reduce heat generation and minimize interference with other pilots. Only use 4W when absolutely necessary for long-range applications.
- Antenna Choice: While the included antenna is suitable, experimenting with different 3.3GHz antennas (e.g., patch antennas for VRX) can further optimize range and signal quality for specific flight conditions.
- Firmware Updates: Periodically check the manufacturer's website for any available firmware updates for the VTX or VRX modules, as these can improve performance or add new features.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official RUSHFPV website or contact your authorized dealer. Keep your proof of purchase for any warranty claims.