DJI Transmission System (The whole lot You Have to Know) – Droneblog







A necessary function behind a DJI drone that’s usually neglected is the drone transmission system.

DJI Transmission System (Everything You Need to Know)

I’ve personally flown a number of DJI drones from completely different generations, and I can say – good heavens, what a distinction!

DJI drones often have the OcuSync transmission system, which is exclusive and proprietary to DJI. The transmission module is put in on all DJI drones and can’t be upgraded or modified, however it is available in completely different variations. And the flight vary, penetration, controller compatibility, and some extra components rely on it.

Right here, I’ll share with you every little thing you must know in regards to the DJI transmission system, why it issues, the distinction between them, and the way we will establish one.

Behind DJI OcuSync: Components & Evaluation

A transmission system in a drone is likely one of the most important elements with out which a drone can’t fly in any respect. It merely can’t make a connection between a drone distant controller and the drone itself.

In client DJI drones, we now have the OcuSync transmission system, which has two roles: 

  • It captures reside video and sends it again to the pilot. The pilot receives a reside feed, which might be seen on the telephone display linked to the distant controller or the DJI RC with a display integrated. The OSD can also be transmitted by the identical module with all the data you must see throughout a flight (battery left, sign energy, path, and many others.)
  • The OcuSync on the drone additionally receives radio enter. The pilot info is shipped from the distant controller and obtained by the identical drone module. 

In FPV, we now have two completely different modules: the video module (VTX) and a separate radio RX module that receives enter on a distinct protocol. However not with DJI.

Subsequently, and not using a transmission system, you can not management the drone or see a reside feed.

» MORE: Lengthy Vary Drones: Final Information

What’s the distinction between numerous DJI transmission methods?

As drone expertise evolves at an unbelievable price, so does the DJI OcuSync. 

There are fairly just a few variations between the completely different variations, so let me allow you to perceive what might be affected whenever you’re about to decide on a drone primarily based on this function.

  • Flight Vary: The flight vary is the primary to be affected. Newer OcuSync variations at all times include a big enchancment in flight vary and sign energy between the radio and the drone. DJI has at all times accomplished a superb job in creating long-range drones, primarily due to their transmission methods.
  • Flight Penetration: Flight penetration is one more important issue that we’ll usually observe to enhance with newer OcuSync methods. From flying a drone behind obstacles and timber to areas with vital interference, the sign penetration of a drone is immediately impacted by the OcuSync transmission model.
  • Reside feed decision and framerate: What we see on our telephone or RC display, the main points we observe, include a selected decision and framerate. That’s one more issue impacted by the OcuSync model. With the newer variations, the drone can transmit extra knowledge in real-time, therefore making the most of higher decision and framerate.
  • Latency: In drone phrases, latency is the response time between the drone distant controller and the drone itself after we relate to radio transmission or between the drone video system and the picture displayed associated to the video transmission. Older OcuSync variations and cheaper radios could have slower response occasions.
  • Compatibility: All these DJI drones with an OcuSync transmission system should be appropriate with a radio that helps the identical protocol. That’s why by no means purchase an RC until you’re assured it’s appropriate along with your DJI drone.

» MORE: When Ought to You Improve Your Drone? (Learn This First)

OcuSync variations

Let’s not leap forward and begin with the traditional expertise discovered within the early model of drones that aren’t used anymore at the moment. 

You is probably not eager about that.

What you must know is that presently, there are DJI drones in manufacturing as of at the moment that use OcuSync variations 2.0, 3.0, 3+, and the newest, 4.0. We’ve flown drones with almost all of them and have examined them completely at Droneblog, so that is the voice of expertise.

What’s the distinction between these variations? How do they deal with all these options?

I bear in mind after I had my first Mavic Air, it struggled to transcend 500 meters (0.3 miles) within the distance earlier than breaking apart the sign badly.

It was certainly that dangerous. So far as I do know, it used some type of dual-band Wi-Fi transmission expertise. 

Nevertheless it was an incredible first drone. I get goosebumps after I bear in mind it. Let me share with you one picture I used to be in a position to seize at a most distance earlier than I fully misplaced connection in line of sight (so I bear in mind)

Then, I upgraded to a Mavic 2 – my first “long-range” drone. What a distinction between these two drones – what a DIFFERENCE!

Think about this being just a few years again. Now, if we give it some thought, the transmission system in these drones was of the primary and second era, and as in comparison with at the moment’s O4, we actually examine futuristic with historic expertise.

» MORE: Sensible Options in Drones (Defined for Novices)

OcuSync 2.0

From the primary time it was launched, the DJI OcuSync 2.0 with Mavic 2 in 2018, DJI drones began to be able to flying long-range. 

5 years later, the OcuSync 2.0 remains to be in manufacturing with the brand new DJI Mini 2 SE and Mini 3 and might be discovered on a number of drones, together with the DJI Mini 2, Mavic Air 2, Mavic 2 Professional & Zoom, Phantom 4 Professional V2 and DJI Matrice 300 RTK.

It was the primary vital enchancment to have the ability to see, on some drones, a reside feed decision of 1080p, having fun with the skies and observing nature on a big pill with… once more, goosebumps…

With the OcuSync 2.0, we had been additionally in a position to fly our drones on dual-band 2.4 and 5.8ghz, and, relying on the drone, we may fly as much as 3.7 miles in Europe and 6.2 miles within the USA.

The intermittent switching between these two bands was an necessary function to look at with OcuSync 2.0 and adjusted the angle on how a DJI drone flies in several environments.

OcuSync 3.0

DJI Mini 3 Pro Settings to Change (Expert Tips)

As drone expertise has advanced, we are actually seeing probably the most used transmission system in all DJI drones: the DJI O3, or OcuSync 3.0

Absolutely, you’ve heard in regards to the DJI Mini 3 Professional or possibly in regards to the DJI Air 2S. Glorious drones, able to flying long-range with out points.

That’s solely due to the brand new and improved OcuSync 3.0 system over the older 2.0.

Whereas the two.0 model was very cost-effective, and we will usually see it in funds entry-level drones, with the better O3 energy, there comes a better value for these drones.

By way of efficiency, the OcuSync 3.0 considerably improved over the two.0.

Relying on the drone, we will see drones comparable to DJI Mini 3 Professional able to flying as much as 5 miles in Europe or 7.5 miles within the USA (in geo-restricted environments) or see a lift of flight distance as much as 15.5 miles or 25km with DJI Mini 3 Professional and Clever Battery Plus.

What a distinction! 

The OcuSync 3.0 additionally proved very able to flying farther in heavy-interference areas, comparable to city or downtown WiFi-choked environments. 

Furthermore, we are actually seeing the DJI RC-N1 and DJI RC (with display), the 2 most used DJI controllers ever to boast full compatibility with all OcuSync 3.0 drones.

However by way of compatibility, the DJI RC-N1 can even work with just a few older O2 DJI drones, whereas each RC-N1 and DJI RC are appropriate with just a few OcuSync 3+ drones (from the Mavic 3 collection). 

» MORE: DJI Mini 3 Professional: One-12 months Evaluation (Video)

OcuSync 3+

Transferring on, the OcuSync 3+ is a minor enchancment of the unique O3 System that’s discovered on most DJI drones these days.

At present, we will see the OcuSync 3+ transmission system solely on probably the most superior client drones launched by DJI, the Mavic 3 collection. 

And that’s it.

Paying 1000’s of {dollars} for such drones, we needed to see some benefit by way of vary and penetration, so we took this addition.

Furthermore, these Mavic 3 drones are appropriate with the professional-level radio controller, the DJI RC Professional, which takes full benefit of this new transmission system.

The identical DJI RC Professional can also be cross-compatible with the DJI Air 2S, which comes with the usual O3 model.

Furthermore, the O3+ Mavic 3 drones are well-compatible with DJI RC and RC-N1 controllers that boast the O3 fundamental model.

See DJI? Cross-compatibility is feasible! Why don’t we see it extra usually with newer drones?

Now, shifting into the technical knowledge of the DJI O3+, with the Mavic 3 collection, we will realistically see a transmission vary of 5 miles in Europe or 9.3 miles within the USA.

If we’re speaking about unrestricted environments, the Mavic 3 drones can fly as much as 18.6 miles or 30 kilometers.

What an enchancment!

However the nice benefit of the O3+ is that being hosted in a professional-level, business drone, we would have liked a extra strong transmission to penetrate interference, to have the ability to take real-estate pictures, examine a constructing, or do some mapping with out having to cope with spotty connections.

The O3+ transmission system, the identical as O3 and O2, operates on dual-band 2.4 and 5.8 GHz however at a lot better energy.

We will additionally see the reside view picture on 1080p at 60fps with the costlier DJI RC Professional. 

» MORE: DJI Mavic 3 Professional Evaluation (I’ve NEVER flown a drone that I loved a lot)

OcuSync 4.0

With 2023, we now have a brand new period of high-end drone expertise that surpasses something ever manufactured, at a fraction of the value.

When you’re nearly to get into the drone passion, I strongly suggest, with none doubt, going both with the DJI Air 3 or DJI Mini 4 Professional.

Each these drones include the newest transmission expertise, the OcuSync 4.0 (and far more).

After a number of years of having fun with drones on the prime of the road by way of transmission energy with the OcuSync 3.0, now these drones appear to be toys compared with O4.

No joke right here.

The OcuSync 4.0 is presently probably the most highly effective transmission module present in principally any client drone.

We’re nonetheless restricted in Europe with a sensible vary of 6.2 miles or 10km, however in america… effectively… I’m questioning how, however each the Air 3 and DJI Mini 4 Professional are restricted to 12.4 miles or 20km in transmission vary.

That’s approach past the visible line of sight if we’re following the drone legal guidelines.

However in actuality, with no restrictions, the O4 transmission system is able to flying a reliable drone for as much as 20 miles or 32 km.

See the place we bought? How can I examine such drones with the 0.3-mile transmission on my previous Mavic Air? It’s good that I’ve offered it, although.

And that’s how drone expertise has advanced previously few years. What ought to we anticipate within the subsequent 5 or 10 years?

On the technical aspect, the DJI O4 makes use of the identical 2.4 and 5.8 GHz dual-band transmission, has a low latency of as much as 120ms, and this new OcuSync system is appropriate ONLY with two new distant controllers:

The DJI RC-N2 and DJI RC 2. 

We’re glad to see it this fashion solely to acquire the very best transmission system. 

Different DJI transmission methods

These aforementioned transmission methods are probably the most used and located in most DJI drones. However hey, they’re not all.

We do have two extra we wish to point out, and they’re as follows:

“DJI Transmission” – but so-called like this, it’s a wi-fi transmission system created by DJI, and it incorporates an uncommon DJI O3 Professional transmission protocol. It’s a standalone module that’s utilized in skilled movie manufacturing on giant cine-lifters or non-drone eventualities.

DJI Digital FPV System – Everyone knows DJI bought into FPV with the DJI FPV and DJI Avata drones. However wait. The DJI Digital FPV System precedes these drones, and it was step one in the direction of digital transmission, a brand new revolutionary technique to see high-quality reside feed in your FPV goggles, an enormous improve from non-DJI analog modules.

» MORE: DJI Avata vs. DJI FPV (Right here’s My Selection)

Transmission system in DJI Distant Controllers

How Long to Charge DJI Mini 3 / Mini 3 Pro Controller (Explained)

With out returning to the traditional drone expertise (why do I nonetheless point out the phrase “historic”?), we now have quite a lot of DJI distant controllers which might be appropriate solely with some drones.

These distant controllers fall into two classes:

  • And not using a display, the place you have to a appropriate cell phone with the DJI Fly App (or related app) to attach it to be able to see the reside view from the drone
  • With a display integrated, the place there’s no want for a telephone to fly the drone. 

So, let’s see what transmission system these distant controller use and their present compatibilities.

» MORE: Finest Drone Controllers

DJI Sensible Controller

It’s an early model of a DJI Distant Controller with a display and precedes the well-known DJI RC. 

The DJI Sensible Controller works on the OcuSync 2.0 transmission system and is unlikely to be appropriate with any new drones. 

This controller was (and nonetheless is) engaged on dual-band channels 2.4 and 5.8ghz and may increase with the O2 a transmission vary of as much as 3.7 miles in Europe or 6.2 miles within the USA.

The DJI Sensible Controller isn’t in manufacturing anymore.

» MORE: Is the DJI Sensible Controller Value It? (Learn This Earlier than Buying)


The most straightforward but with the best compatibility throughout nearly all of DJI drones, we now have the DJI RC-N1.

To make use of this distant controller, you have to a appropriate cell phone with DJI Fly App or different DJI-compatible apps to regulate and see reside feeds from the drone.

The DJI RC-N1 remains to be in manufacturing these days and is appropriate with many drones on OcuSync 2.0, 3.0, and three+ variations.

Mainly, almost all present DJI drones.

» MORE: DJI RC-N1 Controller – What Drones Are Suitable with It? (Defined)


The DJI RC is likely one of the well-known distant controllers with a display that shares a broad compatibility with DJI drones. 

Though not as broad because the N1 model, the DJI RC is appropriate with all drones with the OcuSync 3.0 and three+, and on the identical time, we now have backward compatibility with the DJI Mini 3, which hosts the OcuSync 2.0 model.

We’d like to see this controller appropriate with different O2 methods, comparable to DJI Mini 2 SE, however this will likely be unlikely.

The benefit of getting the DJI RC over the DJI RC-N1 is that you’ve got a high-quality 5.5-inch display that works at full HD decision with 60 frames per second.

With this, you’ll not want to attach a cell phone and arrange the controller earlier than flying a drone. You merely energy on the DJI RC and the drone and fly it immediately.

The DJI RC works on dual-band 2.4 and 5.8GHz, and it adopts the OcuSync HD video transmission expertise, which permits broad compatibility with drones internet hosting completely different transmission items.

DJI RC Professional

The DJI RC Professional is the professional-level model of DJI RC and is appropriate, as we talked about above, with the DJI Mavic 3 line and DJI Air 2S. 

It’s knowledgeable controller made for professionals. 

A few of us at Droneblog have it, and the suggestions shared is a big improve from the DJI RC by way of efficiency, display, transmission energy and penetration, and even the power to put in third social gathering apps.

» MORE: DJI RC Professional Evaluation (The whole lot You Have to Know)


How to Connect/Pair DJI Air 3 (All You Need to Know w/ Pictures)

In 2023, with the launch of OcuSync 4.0, we now have two new distant controllers: The DJI RC-N2 and DJI RC 2, that are upgrades to the N1 model and, respectively, the DJI RC.

By way of design, it appears to be like much like its predecessors. However by way of efficiency and transmission energy, it’s a serious enchancment. And we would have liked that.

However presently, the DJI RC-N2 and DJI RC 2 are appropriate ONLY with the DJI Air 3 and DJI Mini 4 Professional. There is no such thing as a present backward compatibility with different OcuSync drones.

» MORE: DJI RC 2 Evaluation (The whole lot You Have to Know)

DJI FPV Distant Controller 2

This distant controller is appropriate solely with the DJI FPV Digital Transmission system present in DJI FPV and DJI Avata drones.

The benefit of this distant controller is that it was manufactured to behave like an FPV controller, with the chance to take away the spring pressure from the throttle gear.

This distant controller doesn’t help connecting a cell phone just like the DJI RC-N1 or N2 for reside view pictures, and the one function it has is to transmit knowledge to the drone and never purchase any picture, which is obtained on the goggles.

The DJI FPV Distant Controller 2 is NOT appropriate with every other DJI drones and possibly by no means will likely be, because the drone lineup is completely completely different from normal GPS drones.

» MORE: DJI Avata Controller Choices


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