DJI FPV Goggles v2 Range Test : Air Unit vs FPV , Stock vs iFlight Stubbies vs iFlight Crystal HD
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- เผยแพร่เมื่อ 3 ก.ค. 2024
- In this video, I test the DJI Google v2 with different antennas to seek out the best video performance.
I also compare the performance of the DJI Air Unit to the DJI FPV Drone using these v2 Goggles.
The flight test include a range test and also penetration thru hillside and trees, a typical scenario when flying in the mountains.
(all footage is DVR from Goggles - see note at bottom of this description)
Timeline:
0:00 Intro
0:15 Air Unit - Stock Antennas
3:40 Air Unit - iFlight Stubbies
7:02 Air Unit - iFlight Crystal HD + Stubbies
10:24 DJI FPV - Stock Antennas
14:08 DJI FPV - iFlight Stubbies
17:28 DJI FPV - iFlight Crystal HD + Stock
20:33 Bonus: DJI FPV - 2.4ghz Stock
Version 2 of the DJI Goggles has changed a few things.
a) Stock antenna are now LINEAR, not LHCP
this causes a mismatch with the Air Unit BUT matches the DJI FPV Drone
Does this make a significant difference?
b) Antenna usage
the googles antennas are now used differently, moving to 2 transmit and 2 receive (on opposite corners)
Does this affect usage of patch antennas like the iFlight Crystal HD?
c) Goggles are now Dual Band (2.4 ghz and 5.8ghz)
The DJI FPV support both bands, but the Air Unit is only 5.8ghz
Since the v1 Goggles were 5.8 ghz only, most 'improved' antennas are single band only.
Can these safely/effectively be used on the Goggles v2 (assuming you force to 5.8 ghz mode)
These tests flights are designed to explore these questions, and also answer things like...
Could I run the DJI FPV drone on 5.8 ghz only, so I dont have to keep switching antenna?
Test Parameters
Air Unit/DJI FPV/ Goggles are :
- set to 25 mW (CE mode)
this enables us to compare over shorter distances - increasing power would simply increase everythings performance.
- set to 5.8 ghz mode
so testing is comparitive
(except 'bonus run' where we see what 2.4 ghz provides)
- set to have focus mode on.
this enables us to see breakout nicely on the edges
- set to HQ (not low latency)
- I keep my head (as much as possible) in the same position
Test Flight:
a) Initial flight is out 1km, in clear line of sight, no obstructions, pretty level to the take off point.
b) I then fly back, then dive down into the valley, this starts creating some form of obstruction, partial blocking via hillside and also trees.
c) I come back up the mountainside, then run across at 90 degrees, fairly low, again blocking with trees.
d) Back to the top, and then a short run behind me thru the trees, and back
a) is a range test
b/c ) are designed to test penetration
d) is to see difference between omni and directional antenna
other notes:
Air Unit shows stats as subtitles. Unfortunately this is not available on the DJI FPV, so instead I kept a log during the run
The Signal Strength (top left), is a subjective indicator, looking at the average at the time, and notes from my audio log during the flight.
Setup used for tests:
DJI FPV Googles - version 2
(same pair used for all tests)
Antennas tested:
- DJI Stock Antenna (v2 - dual band)
- iFlight Stubbies (5.8 ghz)
- iFlight Cyrstal HD (5.8 ghz)
Drones Used:
5" Freestyle:
Frame : Diatone Roma F5
Flight Controller: Tmotor F7 HD F55A PRO II.
Motors: F60 PRO IV V2\
Props : Tmotor 4943.
DJI Air Unit - Stock Antennas
Crossfire Nano
GPS : Beitian BN-2020.
Battery: 6s 1300mAh
Controller: Radiomaster tx16s + Crossfire micro v2
DJI FPV:
Combo kit - set manually to 5.8gHz , except bonus test, manually set to 2.4ghz
(40mhz)
Note: Ive noticed on uploading the video seems quite a bit more 'compressed' (blotchy) than the DVR that came from the Air Unit or DJI FPV, both where very clean.
however, I think the breakup is still pretty clear in the video.
#DJIFPV #iFlight #DJIAirUnit - เพลง
This is actually the video that i've been looking for! Thank you!
Very nice comparison. Following the video during the explanation is key to putting together how the different antenna systems work.
Thanks!
Incredibly precise and on-point video with great commentary. Thank you, it helped me decide to get the full iFlight kit for my goggles. 🙌
Why did this video make you deside to buy the full set ? The performance is about the same as the stock antenna's according to this video.
Real pleasant voice to listen to . Clip answered my questions too
Thanks! Great comparative video 🔥
Best video for v2 yet.
Very helpful-thank you!
Great video! I use my dji v2 goggles with the dji fpv. I also use the v2 goggles with a 5inch quad that has a caddx polar vista on it. I’m going to start running in 2.4 ghz when flying dji fpv. When I fly my other quad I’m thinking of getting the iflight stubbies and patches. Your video helped. Ty
Very good job 👍
THanks nice video you helped my a lot. And safed me money
No video or radio stats on the second half of the video so can't really tell how much better each setup was. Also altitudes were pretty different for each flight so reception is different. Almost the video I was looking for
In EU power has EIRP Limit meaning. 5.8GHz you can only send max 25mv. So if transmit power is 25mv with dji own antennas aka something dBm+dBi. You can't change focusing antenna because dBi raises so that means your EIRP limit goes over. 5.5GHz you can transmit 1w EIRP, but you need to deal with weather radars. 2.4 100mv EIRP i think is allowed indoors only. But at least Wifis trans mission powers start from -30dBM aka about 0.001mv.
Great video! Maybe you've come around my antennatests as well?
A note to DJI FPV drone: the ce 2.4 ghz has 100mw not 25!
You can upgrade the firmware of the DJI FPV now to also get srt files on the drone like on the air units.
I've created a little script to convert DJI srt to either excel readable CSv (for charts) or shorter, more useable srt files with text bars and only volts or Bitrate.
Happy to share if you ever need this again.
Do you have an British accent? If so it's not the uk we see here,is it? Maybe Australia?
Greets, Mario
thank you, yes - indeed, I love what the tests you do on your channel ... I watched your recent one on the new ORT DigiEyes v2 with real interest - I might buy a pair, and compare to these results.
I think these are LHCP? so it'd be interesting to see how they fair on the DJI Drone.
DJI FPV drone 2.4ghz, ah, I missed that... I guess this also helps the advantage 2.4ghz has
yeah, the new firmware was released I think the one or two days after I did this - arghh, would have made things much simpler :)
cool, I'll check out your SRT tool, that would be very useful.
Yes, Im British... and, indeed it not the UK :)
I've not lived there for many years... Im now living in the mountains in Southern Spain (close to Granada/Sierra Nevada)
thanks for your feedback and help, and also thank you for your videos - they have been very helpful too me.
Cheers
Mark
I just got the iflight crystal, i keep reading comments that i need to change to 5.8gHz in the goggles too? Where is this setting? I looked in my dji googles v2 Menu / transmission and only see preferences (low latency vs high quaility) focus mode and bitrate (set to 50)
Very informative, thanks. Linear antennas seemed to be better. I have v1 goggles and air units. Do you think putting a linear antenna on air unit and goggles would be better than running LHCP at both ends. Thanks again, John
Good question- it would be interesting to try.
I went this way, as I could try a patch antenna.
I do think switching out the antennas on the air unit ( linear/ better lhcp) could yield some interesting results. I’ll try to grab some next time I’m ordering bits for FPV.
im flying a dji avarta with these goggles and just want your straight opinion on what is the best thing to get, iflight patch, keep the stock or the other iflight antenna or the combo of the 2 . Thanks, hopefully a year late question will still get to you :)
What makes the DJI FPV video signal so strong? I'm planning to buy iFlight Crystal HD antenna soon for my dji fpv goggles v1. Should I buy it?
Hi..nice tests. You mentioned at 2.20 that the stock antennas on the goggles are linear antennas..as i know the stock antennas on the goggles and the air unit are LHCP circular polarized antennas..or did you change the stock antennas to linear ones or V2 goggles has linear stock antennas? I have v1 goggles.
The v2 googles come with linear, the v1 goggles with lhcp … this was one of the changes to ‘match’ their DJI FPV drone.
@@TheTechnobear thanks its clear now ✌
Amazing video I just got the Ifly Crystal patch with the omni’s.
I was wondering if I had a version one stock antenna do you think they would work better with the Iflight patch antenna than the stubbie Omni’s ?
I’m only using 5.9 ghz
I don’t have v1, but I’d think they be quite similar , though perhaps a little better than the stubbies - give them a go :)
LOS 1 kilometer 😂😂. Nice test, thx.
Amazing video... One question the iflight antenas are compatible with DJI FPV DRONE?????
Watch the Video, je was flighing iflight patch with the Dji Quad.
can you send me a link in what setup to buy that will improve my long range radio for the fpv goggles
What if i dont want the Googles i want to receive to an hdmi screen
Thank you so much.. I have DJI FPV with V2 Goggles do you think sir that I will get good results and more range with Iflight crystals HD.. thank you
they will work if you force the DJI FPV to use 5.8ghz...
however, I found in my environment 2.4ghz (with stock antennas) works better than anything with 5.8ghz.
so it comes down to, where you fly , does 2.4 or 5.8ghz generally work better?
usually 2.4ghz is better in non built up areas, 5.8 ghz in built up areas with more rf interference.... but its worth flying both and seeing what works for you.
Great video
Do you have much experience with analogue FPV? I have been considering changing to the DJI FPV system for the improved image quality. I have been apprehensive as I am note sure how the two compare. Does the DJI system offer more penetration, will I achieve similar range, and does the cost warent the increase in quality?
Sorry, I’ve not used analog, only digital.
I've flown analog and built new drones with DJI air units this year. I've not wanted to touch my analog drones since. The image quality improvement is a huge step --like when the world moved from analog TV to HD TV.
@@johnxia8181 literally just bought the v2's after numerous analogue vtxs and expensive losses (due to not waiting for GPS lock). The last set up was a rush tank solo @1.6W with Vas ion pro antenna. On Skyzone 03o goggle I had Vas ion pro & Vas Crosshair extreme.
Leaning out the top window of a 3 story block of flats and flying first behind a large row of mature trees, I was getting to about 2.5km ,urban settings, 100m up before it got super grainy where I thought I better turn back.
If I were out in the countryside or around less interference, with LOS , a greater distance could be achieved I'm sure.
I'm waiting for mine to arrive, but I've tried a mates and it's amazing. The clarity in the image and no Intermittent break ups , and static fuzz was grades above my analogue set up.
As for penetration, where is it that you want to be flying? My mate assured me that the dji's do have good penetration, but like analogue, the antenna choice matters. He does free style and flies bandos.
You can get good penetration on analogue if you're flying local. I was using rush tank solo 1.6W and getting 2.5km in urban settings about 100m up. I could swoop down n buzz a mates roof at near enough this distance but because of the geography, and distance I'd lose video signal briefly at the bottom of the dive( about 3 story block) I'd just punch out a lil bit and all was good. Not flown bandos myself with analogue but there must be some reviews on ere somewhere 🤔
I did promise myself I wouldn't be like my mate who's spent ££££ on numerous parts and has loads of drones hung up on his workroom wall, but I'm slowly realising how it happens...
If you can afford it, (I'm still unsure if I did the right thing,its a lotta money i coulda spent on something else) , and you fly often (these AND the needed air unit/caddx vista are too expensive just for a novelty, once every 2 month flight i fell) then go for it. Other than that, upgrading your analogue vtx is a much cheaper option, if you need more power , there's the AKK Ultra 3W!! Surely that'll penetrate!
Very useful information.. I was wondering, using the air unit only, what results were obtained with 5.8 crystal patch and the same combinations of stubbies and stock with 700mw power would reveal..
I'm looking at good reliability at 2-3km range.. Thanks in your experience which is best.. 👍
I don’t think stubbies vs stock make a huge difference… I’d think at 700mw you’d make the distance you want ( though not legal here in EU) though bare in mind terrain has a huge influence .
One thing , I found ( after this video) switching out antennas on air unit to also give a real boost in performance.
@@TheTechnobear thanks, I also have LR Antennas on the air unit that came with a Chimera 7 HD.. So this should help reach further out to approx 3km..👍
Thanks for the greate video👌 i tried the last couple days the manual mode to train it. Im from germany so i also use the CE mode. I have connection errors in a distance 150 meters in front of me three times the last flight. No trees, nothing. Maybe i should switch to 2.4 Ghz manually. Do you have also select a channel manual if you change the bandwith?
150m is not normal, even in CE, with stock antennas for either the air unit or dji fpv drone - in CE with clear line of sight ALL will do 1km.
Im assuming you are using the dji fpv drone (since you mentioned manual mode), as you can see in above video both 5.8 and 2.4 will get you to 1km on the dji fpv.
for sure, the DJI FPV tends to default to 5.8ghz in auto mode, but as you can see at 10:24, this still goes out to 1km.
but yeah, this assumes clear line of sight, trees/hillsides will drop the signal as this video shows.
if you have clear line of sight, I'd suggest :
a) check antennas on goggles are screwed in firmly
b) are you flying somewhere that possibly has alot of wifi activity? or other radio interference?
if (b) you could try 2.4ghz to just see if there is less interference.
basically 5.8 is **usually** preferred in cities to cope with interference , 2.4 where less wifi interference- but always worth trying both.
changing channel will not get you any more bandwidth, it just moves where in the frequency spectrum it uses.
again, you can try different channels to see if some are better than others.
btw: also try turning your mobile phone off (well put in airplane mode) see if that helps
@@TheTechnobear Thanks for the hints. The signal breaks on two different places. Outside of towns or any buildings. It breaks allways if drone is in front of me. Its strange because the connection quality bars in goggles show always "full connection" then the signal breaks down immediately and the save mode turned on. The next time i will choose a different spot and if that happend again turn it to 2.4 ghz.
@@TheJunkernut i assume you mean video (and we are talking dji fpv drone?), not controller connection.
when you say its breaks down... do you mean it goes fully black, or you just start getting pixelation?
Id not expect even pixelation at 150m, on 2.4 or 5.8 - unless something was interfering with the signal.
given its so close, perhaps you should try a ground test...to rule out a technical fault with the drone/goggles.
so put the drone on the ground, and then walk away from it (goggles off) and see when it breaks up.
also try circling the drone at distance, and see if a particular angle is worst...
of course, you can try 2.4 and also try the b3yond hack, but whilst they may help, perhaps they'll be masking an issue with your drone.
sorry, can't sound more positive but really if your in an open area without interference, you should be fine to a reasonable distance... I think usually people that have issues are because they are not taking into account interference or obstructions which can deteriorate the signal alot ... but sounds like thats not the case in your situation :(
@@TheTechnobear Yeah i mean only Image Transmition Lost with the DJI FPV Drone. Controller worked fine. I will try it the next time again. That is a good idea to test the signal range from the ground.
I also have V2 goggles, how should I set this up, I bought iFlight patch antennas, are the patch gonna be on the top and stubbies on botton?
v2 googles send/receive are on diagonals.... so what I do is place patches on both of the bottom, and stubbies on top. so you have a mix of send/receive for both. this works well for me.
(also worth experimenting yourself.... as in your environment, it could be better a different way... just test close range initially ;) )
note: since doing this video I also did some tests with new antennas on the (non dji) FPV quad, and this made a huge difference with the air unit.
in particular, the ORT DJI Air Unit antennas, Id recommend this if you are still using stock air unit antennas.
(Ive also moved over to using the Ort Digieyes patch, but thats because they are dual band, so slightly better with the DJI FPV drone)
How to change to 5.8 Ghz?
Hello, I have the v2 goggles and iflight crystal with truerc stubbies. Can you please tell me where I should put my omnis and patch antennas? thank you
Due to the v2 layout , top or bottom should not make any difference ( since you’ll have one tx, one rx) - I put stubbiest on top, and patch on bottom.
What would make a difference is using diagonals with the patch, as that would mean you’d be placing on just rx or tx - but I’d assume that would result in worst behavior
@Luckyme Fpv Hey, I'm using the truerc stubbies as well atm. Was curious if getting an iFlight Crystal patch is a good idea. How is your experience with this antenna combo so far?
@@Dan-ro6nj honestly the same as 4 stubbies
@@luckymefpv ah, interesting. I guess the greater leap would be getting the true-rc air. They're kind of too big though.. Anyway cheers
@@Dan-ro6nj the true rc stubbies not the air, the air for long range but only in front of you
Didn't get it, so iflight crystal worth it?
You can see from the video signal strengths with and without … so can judge yourself.
Generally with air unit I’d say it’s worth it, not so much with DJI FPV drone which is better with dual band antennas.
But all depends a bit on your environment and usage ( eg city or open spaces)
Can u do this with 2.4ghz on the dji drone
Last flight in video is 2.4 ghz using stock antennas - you can’t use these patch as they are tuned for 5.8 ghz so perform badly at 2.4 ghz.