Wow, Ian, what a fantastic description and visualization of what Gemini and the D modes are! Definitely going to become my reference description. You can even see the LoRa chirp stripes in the capture, which I've never seen before (at least for ELRS OTA). That module is a real sweet piece of engineering too.
Gemini is very cool tech. I only wish there were gyro receivers available with stability flight modes. This would make things very easy for those who want to fly wings without a full on flight controller like my dad.
Hey there, Guru! Bowing down to Your Mastery and your no-doubt Deep Knowledge on the subject, I'm wondering if You reckon the same module working on the 915 / 868 MHz frequencies could make sense for long-range use, or if You think the possible differences might be negligible. Thanks !
Gemini is a good solution for extremely noisy 2.4g RF environments - but still, practicality speaking, most will not need this. I would go for this if I was doing commercial flying a big event or something, or flying a craft with multiple $$$$ on board. That’s where any link failure whatsoever would be potentially high risk and Gemini with diversity rx would offer peace of mind.
500Hz, 250Hz, 150Hz, 50Hz - This is normal mode, using LoRa modulation which has longer range and better resistance to RF interference F1000, F500 - This is F mode, or FLRC, it offers faster modulation and lower latency, but shorter range than the normal mode. My speculation is that in F mode power usage is significantly smaller because in fast mode (F) module spends less time actually transmitting RF signal. That comes with smaller range but faster response.
Is it possible/usefull to use a diversity reciver for a longrange build even if I don't have a diversity transmitter? So incase I need to upgrade the controler one day
@Ian is Worth to mention that power consumption will decrease in case of increasing of the telemetry ratio because TX less transmitting due to increased telemetry ratio.
complicate stuff nicely explained in packets I can understand and wonder in how many directions the elrs developement will go or can go without breaking apart. Looks like elrs has gotten a huge bandwith regarding different evolution branches. pretty impressive
![☀ Увеличиваем качество связи ELRS в РАЗЫ! DVDA и Gemini. [Jumper T20 Gemini]](/img/n.gif)
Fantastic review of the BETAFPV Gemini TX and receivers. And a great explanation of how D modes, Gemini work. I think I learnt something!
Wow, Ian, what a fantastic description and visualization of what Gemini and the D modes are! Definitely going to become my reference description. You can even see the LoRa chirp stripes in the capture, which I've never seen before (at least for ELRS OTA). That module is a real sweet piece of engineering too.
Thanks that’s high praise 😀
What I want is 2.4ghz and 900mhz simultaneously so I can run F1000 on the 2.4 and whatever on the 900 but never ever failsafe.
Looks like that's going to be an option soon. Expresslrs 3.4 using gemini x. But no receivers exist as of yet.
i guess i am missunderstood about what this does if thats not the case
Gemini is very cool tech. I only wish there were gyro receivers available with stability flight modes. This would make things very easy for those who want to fly wings without a full on flight controller like my dad.
Really fantastic video, Ian! Thanks a bunch! 😃
Stay safe there with your family! 🖖😊
And happy holidays!
wonder who actually needs this. elrs at 1w never failsafes, dji O3 drops out first.
It's not so much about range as it is about dealing with high noise environments, eg big events.
Tell us you don’t fly bando, without telling us you don’t fly bando lol. I’ll take the extra signal reliability.
Hey there, Guru! Bowing down to Your Mastery and your no-doubt Deep Knowledge on the subject, I'm wondering if You reckon the same module working on the 915 / 868 MHz frequencies could make sense for long-range use, or if You think the possible differences might be negligible. Thanks !
Well it seem i will wait for radiomaster to make a gemini module
Ooo its a thing bro ❤
12:05 'Redundancy without the penalty of latency.'
How many packets does it send when youre running D150hz and D50hz? If you dont have the betafpv gemini module yet. Its highly recommend! Its so good
I just need to wait for a Radiomaster Boxer 900Mhz gemini and I can leave my Tango 2 :)
I've got Gemini Modula on ts20 915 1w, best of all at present... Gem 915???
Id love to see what d250 and f1000 looks like on the spectrum analyzer
That's amazing, but currently the video link is usually the bottleneck when it comes to long range.
Gemini is a good solution for extremely noisy 2.4g RF environments - but still, practicality speaking, most will not need this. I would go for this if I was doing commercial flying a big event or something, or flying a craft with multiple $$$$ on board. That’s where any link failure whatsoever would be potentially high risk and Gemini with diversity rx would offer peace of mind.
SuperP 14CH Diversity Receiver has a range of what?
How long will a Zorro last with the standard Radiomaster 900mAh batteries in Gemini mode - best and worst case scenario
500Hz, 250Hz, 150Hz, 50Hz - This is normal mode, using LoRa modulation which has longer range and better resistance to RF interference
F1000, F500 - This is F mode, or FLRC, it offers faster modulation and lower latency, but shorter range than the normal mode.
My speculation is that in F mode power usage is significantly smaller because in fast mode (F) module spends less time actually transmitting RF signal. That comes with smaller range but faster response.
Next, A 2.4Ghz and 900Mhz in one you can switch
not switch but 2.4 and 900 are working simultaneously.
Really?
Been using BetaFpv tx's and rx's for 18months now....LOVE THEIR STUFF....never had any probs,....super reliable.🤗
Hi I try this and all though I got good range but when failsafe the receiver won’t re cover no matter what I did . So my quad crash land at the end.
Imo the tx20s 915 with the Gemini module is the best small full gimbal radio around
Is it possible/usefull to use a diversity reciver for a longrange build even if I don't have a diversity transmitter?
So incase I need to upgrade the controler one day
gemini wil work with diversity :)
Any access to the new impending Jumper 20 Elrs Gemini Tx? Nice to see your opinion...
Hi Ian. Does it have TCXO?
This tech is such a wonderful value... I love it. Just ordered one of these... I'm gonna donate - I promise!
Great video and great module definitely will like to get it .😊 That Gemini name saund like a highly Ultra secret project lol lol .😊
@Ian is Worth to mention that power consumption will decrease in case of increasing of the telemetry ratio because TX less transmitting due to increased telemetry ratio.
Great job Ian and great job ExpressLRS and BetaFPV! That looks like a Noctua heat sink don't it? Cheers!
Yes it does!
I'll hold off until they release scorpio
What is Scorpio please?
How hot is the module getting?
Not to bad yes there is heat but it’s not shocking.
@@MadRC Is it close to overheating and stop working, thanks ?
complicate stuff nicely explained in packets I can understand and wonder in how many directions the elrs developement will go or can go without breaking apart.
Looks like elrs has gotten a huge bandwith regarding different evolution branches.
pretty impressive
SHIIIILLLLLLLLL
First you need one razor blade, now you need 2. It's that simple, understand?