If you fly an Autel EVO Max 4T or EVO Max 4N for mapping, inspection, or security operations, you have a capable drone platform – but the internal GNSS receiver has the same vulnerability as any consumer-grade GPS: no protection against jamming, spoofing, or interference near power lines and industrial infrastructure.
Adding an external Septentrio-powered GNSS receiver to your Autel EVO Max gives you independent RTK positioning with AIM+ anti-jamming that keeps your data accurate even when the internal GPS is compromised.
Compatible Receivers for Autel EVO Max
| Model | Weight | Module | Best For |
|---|---|---|---|
| EV322 | ~45g | Septentrio mosaic-G5 | Lightweight payload, EVO Max 4T/4N |
| HB6 | ~85g | Septentrio mosaic-X5 | Full AIM+ anti-jamming, RTK logging |
| HB21 | ~200g | Septentrio mosaic-X5 | All-in-one with 4G LTE and heading |
Why the Autel EVO Max Benefits from External GNSS
- Anti-jamming: AIM+ technology tracks through intentional interference up to 80 dB
- Independent verification: Compare external position against internal GPS to detect spoofing
- Raw data logging: Log SBF observations for post-processing accuracy down to 1 cm
- Multi-constellation: GPS + GLONASS + Galileo + BeiDou + QZSS – more satellites than any consumer receiver
Mounting on EVO Max
The EV322 at 45g is ideal for mounting on the top plate of the EVO Max. The receiver’s small form factor fits easily alongside existing payloads. For EVO Max 4T (thermal + visual), mount the external antenna on the top of the drone for optimal sky view.
Power is straightforward – the EVO Maxs payload port provides 12V, and both the EV322 and HB6 accept 5-24V input drawing under 2W.
Configuration
Configure the receiver via RxTools to output NMEA or SBF at your desired rate. For mapping applications, 10 Hz position output with RTK corrections is recommended. The receiver stores SBF logs internally for post-mission processing.
FAQ
Does the external receiver integrate with Autel Explorer flight app?
The external receiver operates as an independent payload, not as an input to Autel Explorer. Its position data is logged internally or streamed to a companion computer for post-mission geotagging and quality verification.
Will the EV322 work in cold weather conditions?
Yes. The EV322 (mosaic-G5) operates from -40C to +85C, well beyond typical drone operating temperatures. The receiver has been tested in sub-zero conditions for powerline inspection in Central European winters.
Can I use the receiver for post-processed kinematic (PPK) workflows?
Yes. Log raw SBF observations at 1-10 Hz during flight, then post-process against a nearby base station RINEX file. This achieves 1-2 cm absolute accuracy without needing real-time RTK corrections. Perfect for areas without NTRIP coverage.
What antennas work with the EV322 on Autel EVO Max?
The EV322 uses an active GNSS antenna with SMA connector. A standard survey-grade L1/L2/L5 antenna with 3-5m cable works well. For best results, use a lightweight UAV-specific patch antenna mounted with clear sky view on top of the EVO Max.
How does the weight of 45g affect EVO Max flight time?
The EVO Max has a maximum takeoff weight around 4.2kg. Adding 45g for the EV322 plus ~20g for cabling and antenna represents approximately 1.5% of payload capacity. The impact on flight time is negligible – less than 30 seconds reduction on a 40-minute flight.
Related Products
- EV322 GNSS Receiver – Ultra-light 45g RTK receiver
- HB6 GNSS Box Receiver – Compact RTK with AIM+ anti-jamming
- AIM+ Anti-Jamming Technology
