The VRX is the final link in your FPV video chain — and the most overlooked. A mismatched or underpowered receiver will degrade video quality regardless of how good your camera and transmitter are. This guide covers everything you need to choose the right VRX for your application.
1. What Is a VRX?
A VRX (Video Receiver) is the ground-side component that receives the wireless analog video signal transmitted by your drone's VTX. It demodulates the RF signal and outputs a clean composite video feed to your goggles, monitor, or recording device.
While the VTX gets most of the attention in FPV builds, the VRX is equally critical. A low-sensitivity receiver will lose signal before your transmitter's range is exhausted — effectively wasting the power output of your VTX.
VRX units vary in frequency band coverage, receive sensitivity, channel count, form factor, and output type. Choosing the right one ensures you get the full performance your FPV system is capable of.
2. Key Specifications to Understand
Receive Sensitivity (dBm)
This is the most important VRX specification. Measured in dBm (decibels relative to milliwatts), receive sensitivity indicates the weakest signal the receiver can successfully decode. Lower numbers mean better sensitivity.
- -85dBm — Basic sensitivity, suitable for short-range use
- -90dBm — Good for mid-range applications
- -95dBm — High sensitivity, recommended for long-range and professional use
All AERVUE VRX receivers are rated at -95dBm, ensuring maximum range extraction from your VTX.
Frequency Coverage
Your VRX must operate on the same frequency band as your VTX. Mismatched frequencies will result in no video output. Make sure the frequency ranges of your VTX and VRX overlap.
Channel Count
More channels give you greater flexibility to avoid interference. Most modern VRX units support 9CH to 16CH within their frequency band. Multi-band receivers may support significantly more.
Input Voltage
Most VRX units accept a wide input voltage range (7–36V DC), compatible with standard drone ground station power supplies and LiPo batteries.
Video Output
Standard analog VRX units output composite video (CVBS) at 75Ω impedance — compatible with virtually all FPV goggles, monitors, and DVR devices.
Onboard 5V Output
Some VRX units include a built-in 5V 1A regulated output, allowing you to power a small camera or display directly from the receiver without a separate BEC.
3. Form Factors
Compact Module VRX
Small, lightweight receivers designed for portable ground stations or integration into goggle systems. Ideal for racing, freestyle, and compact field setups. Typical dimensions are 44×27×27mm with weights around 20g.
Best for: Racing, freestyle, portable field use, goggle integration.
Box Receiver (VRX Box)
Larger format receivers housed in a robust enclosure, typically with front-panel controls for channel selection and a display for frequency readout. Designed for fixed ground station installations — surveillance platforms, command posts, and professional UAV operations.
Best for: Fixed ground stations, commercial surveillance, long-range professional operations.
4. Frequency Bands
1.2GHz
The longest-range FPV band. Pairs with 1.2GHz VTX units for maximum penetration and range. Required for serious long-range fixed-wing or multi-rotor operations. The 1.2G VRX covers 1050–1380MHz across 9 channels.
3.3GHz
A growing professional band that sits between the range advantages of 1.2GHz and the compact antenna size of 5.8GHz. The 3.3G VRX and 3.3G VRX SE both cover 3170–3470MHz with 16 channels and -95dBm sensitivity.
4.9–5.9GHz
A wideband receiver covering both the 4.9GHz and 5.8GHz spectrum in a single unit — ideal if your VTX operates in the 4990–5900MHz range. 16 channels, -95dBm sensitivity, 5V 1A onboard output.
Multi-Band (VRX Box)
Supports 1.2 / 1.7 / 2.7 / 3.3 / 5.8GHz in a single box receiver using FM/PLL demodulation. The ultimate ground station receiver for operations where frequency flexibility is critical — useful when you operate multiple drone platforms across different frequency bands.
7.2GHz
Dedicated receiver for the 7.2GHz professional band. Pairs with 7.2GHz VTX units for clean, interference-free video in spectrum-congested environments. Designed for government, commercial, and defense drone operations.
5. Matching Your VRX to Your VTX
The most common mistake in FPV system design is mismatching VRX and VTX frequency ranges. Here is how to get it right:
- Frequency must overlap — Your VRX must cover the exact frequency your VTX is transmitting on
- Channel compatibility — Both units should support the same channel set or at least share common channels
- Sensitivity matters more than power — A -95dBm VRX will outperform a -85dBm unit at range, regardless of VTX power level
- Avoid impedance mismatches — Use 50Ω antennas with SMA connectors for best performance
- Smart Audio pairing — If your VTX supports IRC Tramp Smart Audio, ensure your ground station can interface with it for remote frequency and power control
Recommended VTX / VRX Pairings
| VTX Model | Recommended VRX | Band |
|---|---|---|
| 1.2GHz 800mW / 1.6W / 2W / 4W / 5W / 10W VTX | 1.2G VRX | 1.2GHz |
| 3.3GHz 4W / 5W / 10W VTX | 3.3G VRX or 3.3G VRX SE | 3.3GHz |
| 5.8GHz 1.6W / 3W VTX | 4.9–5.9G VRX | 5.8GHz |
| 4.9–6GHz 7W / 15W VTX | 4.9–5.9G VRX | 4.9–5.9GHz |
| 7.2GHz 3W / 5W / 7W VTX | VRX Box 7.2G | 7.2GHz |
| Multiple bands / mixed fleet | VRX Box (Multi-band) | 1.2–5.8GHz |
6. OEM and Bulk Buying Considerations
If you are integrating VRX units into a commercial drone platform or ground control station, here are the key factors to evaluate:
- Frequency certification — Ensure the VRX is certified for your target market (CE for EU, FCC for US)
- Consistent supply — Verify that your supplier can maintain stock across multiple SKUs for ongoing production runs
- Integration compatibility — Check video output format (CVBS 75Ω) and connector type (SMA) match your ground station design
- MOQ flexibility — Factory-direct suppliers typically offer MOQ from 20 units, with sample availability before bulk commitment
- Custom labelling — OEM branding is available for volume orders, useful if you are building a branded ground station product
7. Quick Comparison
| Model | Band | Channels | Sensitivity | Form Factor | Best For |
|---|---|---|---|---|---|
| 1.2G VRX | 1.2GHz | 9CH | -95dBm | Compact | Long-range fixed-wing |
| 3.3G VRX | 3.3GHz | 16CH | -95dBm | Compact | Mid-range professional |
| 3.3G VRX SE | 3.3GHz | 16CH | -95dBm | Compact | Mid-range professional |
| 4.9–5.9G VRX | 4.9–5.9GHz | 16CH | -95dBm | Compact | 5.8GHz / wideband use |
| VRX Box (Multi-band) | 1.2/1.7/2.7/3.3/5.8G | Multi | -95dBm | Box | Mixed fleet operations |
| VRX Box 7.2G | 7.2GHz | — | -95dBm | Box | Professional / gov UAV |
8. Final Checklist Before You Buy
- ✅ VRX frequency band matches your VTX
- ✅ Receive sensitivity is -95dBm or better
- ✅ Channel count is sufficient for your operating environment
- ✅ Form factor suits your ground station design (compact vs. box)
- ✅ Input voltage is compatible with your power supply
- ✅ Video output (75Ω CVBS) matches your goggles or monitor
- ✅ CE/FCC certified for your target market
- ✅ Supplier offers OEM support and consistent stock for volume orders
Conclusion
Choosing the right VRX comes down to three things: matching the frequency band of your VTX, prioritising receive sensitivity, and selecting the right form factor for your application. For racing and freestyle, a compact module VRX at the right band is all you need. For professional long-range and commercial operations, invest in a high-sensitivity box receiver with the frequency coverage your fleet demands.
AERVUE supplies 6 VRX models covering 1.2GHz, 3.3GHz, 4.9–5.9GHz, multi-band, and 7.2GHz — all rated at -95dBm sensitivity and available factory-direct from MOQ 20 units.
Looking for a VRX supplier?
AERVUE offers 6 VRX models across all major frequency bands. Factory direct, OEM available from MOQ 20 units.