DJI Ocusync 2.0: What We Need To Know About This Great Fpv Transmission System
If you are thinking of buying the best drone for yourself, considering buying the Mavic 2 Zoom or the DJI Mavic 2 Pro, then we have definitely taken a look at the OcuSync 2.0 FPV transmission technology used in these drones. Have heard. But still, the question in your mind will be that what are the benefits of OcuSync and what is it really? So today we are going to tell in detail about OcuSync in this article.
A Little History of Ocusync technology
We first found mavic 2 pro ocusync 2.0 and it is a light bridge technology and which drone is a wireless transmission system that gives us HD wireless control signal and video signal in a very short time and we can do them for a long time with the help of OcuSync technology.
Can be broadcast over long distances easily. In DJI's original Mavic Pro, we were only able to broadcast HD 720p for a total of 4.3 miles. But on OcuSync technology 2.4 GHz we can easily transmit 1080p video along with 720p. This 1080p mode was only for short-range and whenever we select it in auto mode it will automatically drop to 720p then it will degrade the signal one.
One of the other big advantages of the OcuSync technology was its significantly lower latency for digital systems. Yet it was not as short as an analogue, which was between 1590 and 171 milliseconds.
One of its big advantages was that we can easily connect 4 devices to it and we can connect 2 goggles and 2 remote controllers or three remotes to a set of DJI goggles. This is completely new to us which we have never had before as a drone pilot.
DJI released their new Mavic Pro FPV Goggles only after DJI released their OcuSync technology for fast signal receiving and low latency wireless FPVs. They also supported a number of aircraft features, such as aircraft settings and head tracking camera controls.
dji ocusync module for drone pilots giving 720p at 60 frames second live viewing which we can use for lower latency than normal channel mode and with the help of this smooth mode we can improve FPV latency. can be reduced to 110 milliseconds.
However, among the downsides of this new mode was limited recording for us on a plane at 1080p at 60 frames per second. So now we can record for ourselves in 4K if we have used transmission mode, but if we want to get low latency for ourselves even using the specs from DJI Mavic Pro then we must use the new smooth mode Needed.
After some time DJI updated the Mavic Pro to the DJI Mavic Pro Platinum. But we did not see any change in the OcuSync transmission system. It still worked exactly the same way with the DJI specs, the same system.
DJI released the new Goggles Racing Edition with the OcuSync Air system in their Mavic Pro Platinum. It was developed by DJI for DIY use in fixed-wing aircraft, specifically for ocusync fpv , and was a new updated version of an earlier OcuSync system, now dual-band. Which was like the label of OcuSync 1.5 technology. Due to this, it was useful in working on both 2.4 and 5 GHz.
The new version now had even lower latency on the DJI Mavic Pro than the original OcuSync and was specifically designed for FPV flying. If we lowered its resolution to 480p, we got latency as low as 49 milliseconds and its maximum resolution was 1280 x 960.
Another new feature was its ability to automatically switch between bands with ease. Changing between 2.4 and 5 GHz in flight made it a reality for us to get the best possible signal.
OcuSync technology was later used by DJI on the Phantom 4 Pro v2.0 aircraft. Because the original DJI Phantom 4 Pro still had light bridge technology to receive the signal. Which was later but moved to the newer OcuSync. Which was more than a hybrid system: but it just wasn't as good as the Mavic Pro.
Even though the DJI Phantom 4 Pro had dual bands similar to the dji ocusync air system review, it still wasn't able to automatically replace these in flight. So while we can use it 2.4 or 5 GHz, we have to select it manually.
The DJI Phantom 4 Pro had a range of about 4.3 miles and its system was capable of transmitting up to 1080p. The Phantom 4 Pro's latency was still somewhere between 165 and 220 milliseconds and whether that was nice and wide for us depended on our smartphone or whether we were using the Plus RC from DJI for ourselves.
The lowest latency and good signal were achieved when using the DJI Plus RC which was then between 160 and 180 milliseconds and the figure of 220 milliseconds for us were when we used our Android device.
OcuSync 2.0
ocusync vs ocusync 2.0
The newest Mavic 2 Pro drone from DJI uses OcuSync 2.0. As we all know as a drone pilot, DJI has integrated all the previous versions of their OcuSync into one system and DJI has continuously added some improvements to it. OcuSync's new system delivers up to 1080p and 5 miles, OcuSync also features dual-band 2.4 and 5 GHz with automatic band switching in-flight. So it will automatically switch between the two modes to give us the best signal.
This allows low latency up to 130 milliseconds with 130 milliseconds in it as before and the video link frequency can change frequently. We can easily update OcuSync firmware.
We found ocusync 2.0 dji to be a similar system to the DJI Lightbridge, as it is surrounded by FHSS control signals and is also a good OFDM video carrier. If we look at some of the top images obtained from this, we find that we have an OFDM carrier in the centre. Which is present in a very large mass with many small carriers. Which we can easily see between them.
To know the way OFDM works on a drone, whenever we turn it on for the first time it looks for the clear channel and the video to stay there for the whole flight. Will stay on the channel. Only when our video carrier shifts:
if it really interferes or
If we also ask it to change the channel manually.
As long as it's operating in the normal environment for us, it will only choose one channel on its startup and it's going to be there for the entire flight until we shut down our plane.
We will see that there will be an FHSS control signal around it. The way FHSS works for us is that we have constantly changing packets of data in the OcuSync band. This picture represents a spectrum of it and the blue peaks here are basically its historical position where our carrier has been. We can hardly understand through the picture how TT is jumping at such high frequency.
We have to understand what each of these peaks is, here a position with the carrier has jumped continuously and it is still constantly jumping between these positions. It's not doing this because it often does it randomly. So what we have will see us jump from the first one to eighth, third to tenth and so forth.
And when we can see all this easily on a range, then what we can see represents many peaks. Each of those peaks is a position with each of the carriers we see and that will jump back to some other point in the future but it doesn't happen whenever we show it that way.
Lightbridge and OcuSync are the kinds of technology that works to merge these two systems into one. If we look closely at an OcuSync trace we can easily see the OFDM mass at its centre and this is its main video carrier carrying the HD video signal back from our drone camera to our remote controller.
The blue peaks we can see all around are the FHSS signal jumping around for our remote controller link. The light blue colour seen here is the one on which it has been jumped. And the deep blue colour present in it is historical where it has been in the past.
Now our thing to notice and understand is that when we see it good we will see that it jumps continuously on OFDM carrier also. and can see FHSS is constantly switching high rate frequency on it and that it jumps to the main channel still our video is on because it is jumping so fast and still it doesn't matter because It jumps on top of it.
Even if that information is not received, it has already jumped to the next location and that packet will be picked up by our drone or remote controller.
Let's now compare OcuSync to Lightbridge on the spectrum one more time. This is OcuSync:
And this is the light bridge signal:
As we can see they are very similar to each other. We still have the same OFDM mass as before and around which the FHSS control signals are constantly jumping. As we mentioned earlier, on top of the large red mass lies our OFDM with our dark blues and light blues FHSS. The red mass on the light bridge below is OFDM with the FHSS showing the blues and the pink ones still jumping to the current position.
So from the point of view of radio, these two systems are very similar and virtually identical.
So now the thing to be understood is that then what is the real difference between them?
So let's understand their basics which are as follows:
Lightbridge is a combination of software and custom hardware. Which is based on FPGAs making it expensive to make. Then later DJI started doing custom silicone in its manufacture. Its upgrade capability is also limited and is still expensive due to a combination of software and hardware.
That's one of the reasons we move on to the DJI Inspire 2 when things like the Inspire 1 and the original Phantom 3 are compatible and then incompatible. This was because there was a difference in both the hardware and because we could not use one interchangeably.
The second OcuSync technology is more of a software-based system and SDR. Which fully works on generic off-the-shelf hardware, such as Wi-Fi hardware, can use the OcuSync system. Which somehow allows DJI to keep hardware costs down. This suggests they should use more compact packaging and there is no need to build expensive FPGAs or custom hardware.
Because the processes that we use in pretty much all devices these days, like in drones, and smartphones already have onboard radio hardware that is truly designed for Wi-Fi. So DJI is able to take advantage of existing hardware to get the same kind of cool system they originally designed with one of their Lightbridges.
Advantages of OcuSync over Lightbridge
OcuSync having a software base means that DJI may upgrade it further in the future. As we know that a hardware upgrade has its limits. But if we look at the original DJI goggles, by contrast, they'll be updating the nuts to better support the new OcuSync 2.0 that came with the Zoom and Mavic 2 Pro because they're still compatible on the same frequency. can. Since there is no 5 GHz radio, it will work only on 2.4 GHz.
If they had used a hardware base light bridge, then we would not have been able to do this much, because the light bridge is a combination of software and hardware to complete its entire transmission system. Because OcuSync is an SDR it is software, so as long as the processors are powerful enough to support it, we can easily upgrade an existing system to be compatible with the new one.
The thing that both have in common is that they are based on very similar systems. OcuSync technology allows DJI to do what they originally could with Lightbridge on existing off-the-shelf hardware.
This allows us to do it cheaper and better in smaller packaging and that's why for now the LightBridge system is best kept for larger drones with a good price whereas the OcuSync we'll see in lower model drones still don't technical almost anything. Giving similar performance.
Honestly speaking, DJ's techno I would pretty much move on to OcuSync on every system over time. While the DJI Inspire 2 still uses Lightbridge (as there are some small benefits to this transmitting system) I would expect any aircraft to probably move to use OcuSync.