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Ocusync 2.0 vs. 3.0

VenomXts

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Using 3.0 on the FPV drone and using 2.0 on my Air 2 i have noticed the following things.

  • Range is slightly better with penetration (I fly above woods behind my house often) but not significantly better... Hoping a back ordered non stock set of goggle antennas improves this significantly.
  • Latency is much improved from 3.0 vs 2.0 and you see that in the handling of the unit
  • I am sure there are some optimization as well
Be interested to see what other say i don't see a direct comparison in doing a little googling.
 

arehs9

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Using 3.0 on the FPV drone and using 2.0 on my Air 2 i have noticed the following things.

  • Range is slightly better with penetration (I fly above woods behind my house often) but not significantly better... Hoping a back ordered non stock set of goggle antennas improves this significantly.
  • Latency is much improved from 3.0 vs 2.0 and you see that in the handling of the unit
  • I am sure there are some optimization as well
Be interested to see what other say i don't see a direct comparison in doing a little googling.
Right, I have found very little in regards to comparisons. Hopefully we get some specifics soon.

Though that makes sense since it was implemented on the Fpv that a lot of the improvements are on the latency side.

Thanks!
 

brett8883

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Much higher Transmission Power for FCC mode (these numbers don’t look significantly different but this is a huge difference in power as the scale is logarithmic.)
31.5 vs 26 dbm

More than 4 times higher max frame rate.
120vs30

Higher minimum resolution, though lower max resolution.
810 vs 720/1080

Much higher bitrate
50Mbps vs 12 Mbps

Much lower latency
28-48 vs 120-130ms

Not in the specs but I believe Occusync 2.0 used a bandwidth of 20 MHz and 3.0 uses 40 MHz but I could be wrong.

Overall it’s a large upgrade especially for FCC. You can see where DJI has focused more on the quality of the transmission over brute distance.

Occusync 3.0
  • Transmitter Power (EIRP)​

  • 2.400-2.4835 GHz
  • FCC: ≤ 31.5dBm
    CE: ≤ 20 dBm
    SRRC: ≤ 20 dBm
    MIC: ≤ 20 dBm

    5.725-5.850 Ghz
    FCC: ≤ 31.5 dBm
    CE: ≤ 14 dBm
    SRRC: ≤ 25.5 dBm

  • Low-Latency Mode: 810p/120fps ≤ 28ms
    High-Quality Mode: 810p/60fps ≤ 40ms
  • Max Video Bitrate​

  • 50 Mbps


Occusync 2.0
  • Transmitter Power (EIRP)​

  • 2.400-2.4835 GHz:
    FCC: ≤26 dBm
    CE: ≤20 dBm
    SRRC: ≤20 dBm
    MIC: ≤20 dBm

    5.725-5.850 GHz:
    FCC: ≤26 dBm
    CE: ≤14 dBm
    SRRC: ≤26 dBm
 

DroneToJoy

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anyone know if occusync 3 principly will work using the current MA2/ Mini2 RC?

I'm waiting for the upgraded MA2S, which will be using Occusync 3 from what I hear...
 

arehs9

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Much higher Transmission Power for FCC mode (these numbers don’t look significantly different but this is a huge difference in power as the scale is logarithmic.)
31.5 vs 26 dbm

More than 4 times higher max frame rate.
120vs30

Higher minimum resolution, though lower max resolution.
810 vs 720/1080

Much higher bitrate
50Mbps vs 12 Mbps

Much lower latency
28-48 vs 120-130ms

Not in the specs but I believe Occusync 2.0 used a bandwidth of 20 MHz and 3.0 uses 40 MHz but I could be wrong.

Overall it’s a large upgrade especially for FCC. You can see where DJI has focused more on the quality of the transmission over brute distance.

Occusync 3.0
  • Transmitter Power (EIRP)​

  • 2.400-2.4835 GHz
  • FCC: ≤ 31.5dBm
    CE: ≤ 20 dBm
    SRRC: ≤ 20 dBm
    MIC: ≤ 20 dBm

    5.725-5.850 Ghz
    FCC: ≤ 31.5 dBm
    CE: ≤ 14 dBm
    SRRC: ≤ 25.5 dBm

  • Low-Latency Mode: 810p/120fps ≤ 28ms
    High-Quality Mode: 810p/60fps ≤ 40ms
  • Max Video Bitrate​

  • 50 Mbps


Occusync 2.0
  • Transmitter Power (EIRP)​

  • 2.400-2.4835 GHz:
    FCC: ≤26 dBm
    CE: ≤20 dBm
    SRRC: ≤20 dBm
    MIC: ≤20 dBm

    5.725-5.850 GHz:
    FCC: ≤26 dBm
    CE: ≤14 dBm
    SRRC: ≤26 dBm
Dang, thanks for the thorough response, that's very interesting! Seems like a pretty sizeable improvement
 
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CADEU

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anyone know if occusync 3 principly will work using the current MA2/ Mini2 RC?

I'm waiting for the upgraded MA2S, which will be using Occusync 3 from what I hear...
From what i gather occusync is purely software based but new updates do require faster hardware. If the Mavic Air 1 could handle Occusync 2 and MA2 could handle occusync 3 why not push that update to legacy customers?
It's annoying that DJI drops all software development after like 6 months. But then release a new drone with incremental hardware upgrades and they just make it look better with a new software update. Then do unnecessary hardware modifications so you can't use your previous accessories.
Us loyal fans/customers should really be pressing on DJI to do more software updates.
 

brett8883

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From what i gather occusync is purely software based but new updates do require faster hardware. If the Mavic Air 1 could handle Occusync 2 and MA2 could handle occusync 3 why not push that update to legacy customers?
It's annoying that DJI drops all software development after like 6 months. But then release a new drone with incremental hardware upgrades and they just make it look better with a new software update. Then do unnecessary hardware modifications so you can't use your previous accessories.
Us loyal fans/customers should really be pressing on DJI to do more software updates.
Well Occusync is the entire transmit and receive system which is a combination of antennas, amplifiers, signal processors, and video encoders/decoders. So it really isn’t even mostly software.

The most major difference between Occusync and Occusync 2.0 was the addition of the 5.8Ghz frequency and auto switching between 2.4 and 5.8. That certainly required different hardware.

I’m sure that Occusync 3 on the DJI FPV is achieving the increased frame rate and lower latency due to at least in part due to a tri-channel connection and faster encoding and decoding which requires new hardware presumably.
 

Jeff2020

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Much higher Transmission Power for FCC mode (these numbers don’t look significantly different but this is a huge difference in power as the scale is logarithmic.)
31.5 vs 26 dbm

More than 4 times higher max frame rate.
120vs30

Higher minimum resolution, though lower max resolution.
810 vs 720/1080

Much higher bitrate
50Mbps vs 12 Mbps

Much lower latency
28-48 vs 120-130ms

Not in the specs but I believe Occusync 2.0 used a bandwidth of 20 MHz and 3.0 uses 40 MHz but I could be wrong.

Overall it’s a large upgrade especially for FCC. You can see where DJI has focused more on the quality of the transmission over brute distance.

Occusync 3.0
  • Transmitter Power (EIRP)​

  • 2.400-2.4835 GHz
  • FCC: ≤ 31.5dBm
    CE: ≤ 20 dBm
    SRRC: ≤ 20 dBm
    MIC: ≤ 20 dBm

    5.725-5.850 Ghz
    FCC: ≤ 31.5 dBm
    CE: ≤ 14 dBm
    SRRC: ≤ 25.5 dBm

  • Low-Latency Mode: 810p/120fps ≤ 28ms
    High-Quality Mode: 810p/60fps ≤ 40ms
  • Max Video Bitrate​

  • 50 Mbps


Occusync 2.0
  • Transmitter Power (EIRP)​

  • 2.400-2.4835 GHz:
    FCC: ≤26 dBm
    CE: ≤20 dBm
    SRRC: ≤20 dBm
    MIC: ≤20 dBm

    5.725-5.850 GHz:
    FCC: ≤26 dBm
    CE: ≤14 dBm
    SRRC: ≤26 dBm
WOW brett8883.... where were you when I was in school and struggling through calculus?
 
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Olduwan

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I have a mini2 and an air2s. I just tested and noticed I can fly without lag when I’m inside my house with the air2s. When I try the same with the mini2, it lost connection almost instantly.
I think ocusync3 improves signal obstruction mitigation, so probably much better for FPV.
 
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