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With a variety of discuss across the Mavic 3 and DJI Sensible Controller assist and among the confusion on Ocusync 2 and the M3. This could put a bit extra readability on what’s happening and why it’s not so simple as Ocusync 2 on the RC-N1 works and the Ocusync 2 on the SC doesn’t.
A little bit of historical past DJI created Ocusync with the discharge of the Mavic Professional, earlier than this on earlier fashions we had the Lightbridge system that was a hardware-based radio system. What is named Ocusync 1 on the Mavic Professional is a software program radio (SDR) resolution primarily based on off the shelf Leadcore SOCs.
These are Arm A7 chips which have a built-in 4G/LTE RF modem.
Later the Mavic 2 was launched with what DJI referred to as Ocusync 2 once more primarily based on Leadcore with the White FPV goggles and the Goggles RE and Ocusync Air system all fielding the identical Leadcore chipsets.
This was DJI’s transfer into SDR primarily based video/RC and telemetry hyperlink and it was pushed by the leadcore LC1806 Sequence for example. No matter if it was Ocusync 1 or 2 it was all the identical Leadcore primarily based system and allowed for as much as 1080p video, long-range and latency of round 130ms.
As a result of this was DJI’s personal SDR primarily based hyperlink it additionally meant they have been capable of truly improve earlier {hardware} with then newer Ocusync 2 protocol on issues the White FPV Goggles.
Subsequent got here alongside the DJI Digital FPV System, this took issues to a complete new stage as whereas DJI had dabbled in FPV with the Ocusync Air system this was once more Leadcore primarily based and suffered from excessive latency. Nevertheless, with the Digital FPV system, we had one thing new we had not seen earlier than. the Leadcore chipset was gone and the system was pushed by a brand new customized P1 SOC.
Whereas there aren’t any revealed specs on this chip we all know it’s a devoted customized SOC with RC/ Video encoder and built-in devoted RF modem. This new chipset is utilized in all components of the Digital FPV system so the Goggles, DJI FPV RC V1 and Air unit all function the identical SOC with it getting used to immediately encode and decode the video, RC hyperlink and telemetry.
The most important advantages of this new chipset in comparison with the Leadcore resolution is way greater bitrates and the sub 30 ms latency hyperlink in comparison with 120 or so ms seen earlier than and it’s decrease than something we have now seen earlier than from DJI.
DJI went on to develop a second model of the chipset referred to as the S1, it is a smaller model of P1 with no video encoder on board. This chip is designed to be both utilized in RC functions the place no video output is required just like the FPV Drone distant or in drones/remotes the place the encoding is offloaded to different processors equivalent to the primary video processing SOC.
Mainly, it is a very related setup to the previous Phantom 3 Superior and Professional fashions the place there was a distinction in video recording decision and body charges and stay feed bitrate because the Advance used the A9 Picture processing SOC for each video hyperlink encoding and SD recording whereas the P3Pro had a devoted second TI encoder for the stay feed permitting the A9 to be devoted for the SD recording and as such greater resolutions and body charges may very well be had by the consumer.
The identical precept stands for the S1 and P1. One devoted encoder and one doesn’t and wishes an exterior one. For the reason that FPV system was launched we have now seen both the P1 or S1 chipset seem in all the brand new RTF fashions from DJI changing the Leadcore resolution.
The primary craft was the Air2 utilizing the S1 in each the drone and distant with the H6 digital camera SOC dealing with the encoding for recording and stay feed, the Mini 2 was launched later once more with the identical setup.
The DJI FPV Drone was launched with the P1 onboard just like the Air Models and the Air 2S was the primary shopper digital camera drone mannequin to make use of the P1 plane facet with the S1 within the RC-N1 RC permitting for greater recording charges and resolutions however 1080p 30 stay feed. DJI additionally referred to as this hyperlink O3 for the primary time. The brand new Mavic 3 once more makes use of the P1 craft facet, we all know the RC-N1 that’s used on the Mini2, Air 2/sand the M3 relies on the S1 nonetheless and is classed as Ocusync 2.
Nevertheless, it’s not clear but what the RC Professional is utilizing as we don’t have full tear down pictures but however as that distant DJI name O3+ when used with the M3 It’s very prone to be the P1 primarily based on that hyperlink being 1080P 60 15Mbps and the very fact the Enterprise Sensible Controller with the M300 additionally makes use of the P1.
Right here and now it appears DJI is labelling fashions utilizing the S1 Ocusync 2 however fashions with the P1 Ocusync 3/3+ of their advertising and marketing nevertheless it’s price noting it’s all merely variations of the identical factor and the variations are the implementations of the picture processing and reminiscence greater than the rest.
Now right here is the place issues get just a little complicated for the end-user. We even have two {hardware} variations of Ocusync 2. The Leadcore implementation on the Mavic 2, P4PV2 and Sensible Controller and the customized S1 model on the Mini 2 and Air 2.
Technically whereas the chipsets are completely different it’s an SDR and they’re appropriate with one another with out problem so long as DJI permits compatibility by way of firmware inside {hardware} limits.
Nevertheless, there may be additionally then the combo of P1 primarily based Ocusync 3 on the Air2S and the Leadcore primarily based Ocusync 2 Sensible Controller. Whereas DJI does say they’re appropriate customers have had points with this mixture and that is possible as a result of Leadcore resolution being maxed out making an attempt to take care of the extra processing overhead.
This additionally immediately feeds into the Mavic 3 not being appropriate with the Sensible Controller as whereas the identical mixture of Leadcore and P1 chipset has been used with the Air2S and SC it’s been problematic and because the Mavic 3 is pushing greater decision and bitrates than any of the others apart from FPV DJI have possible merely determined it’s not going to offer acceptable efficiency.
Whereas irritating for customers there’ll at all times be some extent the place the {hardware} limits turn out to be a problem. What’s fascinating in all of that is the DJI Digital FPV system seems to have been a testbed for the customized P1 platform and it’s clearly been a hit as DJI have continued to make use of it of their merchandise together with the brand new Mavic 3.
There was some noise on the good controller compatibility it’s just a little extra advanced than simply the naming as you may see right here. Right here and now at present it seems it’s not going wherever and it’s clear DJI construct the P1 with a watch to the long run because it’s seen extensive and ranging implementation now in fashions from the M3 to M300.
This was researched and written by Mads Tech.
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