hey i got a little interference drop out on my nirvana today.. anyway i'm ordering tbs micro tomorrow, only had 700mwand still got a radio drop at 1km. otherwise i'm blown away by the goggles, so nice to see everything, but i do feel like i need to adjust, ps. 50mbs all the way even on 500mw.
@@noforyoutubepremium3108 for DIY drones DJI HDL V1 mode: it will be similar I guess (but I still need to test this aspect) in V2 mode (with the DJI Drone) it can work if you set the transmission to 5.8 only mode. Then the gain should be similar to what we see on V1 mode. But honestly: if you're in fcc mode, you are perfectly fine with the stock antennas! This Occusync3 is really good. Very sharp - almost like 1080p resolution all the time (except if you're really far out or behind stuff). greets, Mario
@@Rcschim Thanks Bro! Forget the DJI Drone - Don't own it, won't buy it! ;) So, if I read you right, you're saying unless you fly long range, or behind a lot of trees, buildings, etc. the factory antennas are fine. If I do fly behind a lot of trees, buildings, etc. but not far away, the stock antennas will be ok, but if I want more penetration though objects, I think the iFlight Crystal antennas are best for me...because I want low profile, ease of storage, convenience, and a decent - non rip off price! (ALL 4 stubbies products, I'm talking to you!) lol =(:^)-
@@Drone-Pilot Don't be so sure about that. I've heard plenty of reports from people on rcgroups that they burned pixels in their DJI goggles. ALWAYS be careful with any goggles! Don't take the chance!
Great simple comparision. Nice presentation of practical info. Curious if tower in background is electric, or a cable-car tower? Probably has no effect, but I'm always curious what effect metal structures have on beam patterns.
cool, i was out today first real flight with dji v2's, its pretty amazing, amazing penetration on og dual band at 700mw didnt even see a drop on 50mbs 100 yards away behind two rows of trees.
@@definingslawek4731 no, i fly with lhcp on the vista and two iflight stubbies and two original v2 linears, i can't feel any difference, wait till you have spare cash before you upgrade.
I think you said you were using the v2 goggles? Just confirming. ;) I think the iFlight Crystal is the huge winner here! Super compact and great looking and the ability to leave them on all the time. Really impressed with the results with 200mw! I'll never use 25mw, so 200mw is meaningful to me. Now, I wonder what they would do with an extender put on to get the omni's up higher and sitting where you have found that omni's perform best - with the top parallel to the ground (straight up and down). I question how any of these omni's do at an angle compared to straight up. I also wonder how the long stem, to get the omni above your head, would improve reception. Those were the hot antenna when analog was going strong. Trying an "Economy Test", that would be really interesting, is "stuff in the bag" antennas! ha! Like two of the red Triple feed Patch ($10) that are open source Maarten Baert antennas. They do RHCP or LHCP too! Then for omni's use two Foxeer Lollipop's as they are also very common and low cost. This would tell us if these expensive antennas are really worth buying or if "stuff in the bag" we already own would work just as well. I superb test, as always my long distance friend! I think if I lived in the same town as you, I'd be up there helping you every bit of the way through your extremely interesting tests! But, I am thousands of miles away in Oregon, USA. lol Oh well... :)
Nope - these were the V1 goggles! if you use an extension cable you will loose some DBs alone there on the way (once I saw 50% loss by using 3m cable - of course it's less if the cable is shorter). we could use an RPSMA to SMA adapter + 45° (up) angle adapter and then a conventional SMA LHCP antenna - could work - but I fear these adapters also cost a bit of DB...
What another excellent video! I'm still using the V1 goggles with foxxer 3 (the long ones) for when flying over 2km. Cheap but effective. Interesting their seems to be a different average between the V1's and V2's
Thanks for testing. Minor note: the way you placed your hands may be blocking some of the signal during the 45 degree tests, and the Crystal SMA connectors dangling in front of the lower stubbies isn't ideal either.
Thanks for feedback. With limited time for those tests there are many little flaws always :) that's why I never claim my tests to be scientific :) if I try to treat all test candidates equally as bad - it should even out :)
Those stock antennas offer the best bang per buck for sure. I sometimes wonder if we could have 4x 20 turn helical with a motorised antenna tracker connected to mavlink and then get the best of both. Full 360° coverage and high gain lobe sensitivity.
The 7T helicals performed poorly because your vertical alignment was poor -- ie: they were pointed at the sky so the transmitter was *below* the beam. And, because the 7T beam is much narrower, the effect was less pronounced with the 3T.
Yes and ontop of that the testing location is ekevated above the airunit location. But also the results were suprising for the other antennas too. Stock beating stubbys? I think more sample time is needed, the signal can be quite unstabile and jumpy for a few seconds when moving around the goggles....especially when the hands are close to the antennas, even if not blocked.
@@SLINGSHOTandMOLOTOWS I'm not surprised that the stock beat the 3rd-party stubbies. The DJI antennas are not at all bad and I think other companies are trying to create a need where one does not exist. All you will gain from 3rd-party stubbies is a more compact goggle setup while the antennas are installed.
@@xjet I was victim to this marketing gag of stubbies as well ;) But the compact factor is a good thing. plus you dont wear out your SMA conncetors by unscrewing the stock subbies every time you use them. A shame that I've pointed the helicals up so much (but I think it looks worse on video than it actually was). Greets, Mario
@@Rcschim accually I think its more the short sample time that gave the surprising results. The vas had kind of the same amount of up angle. And also the nature of antenna testing, results are usually pretty unpredictable.
I also would like to see you test the x-Airs. I have flown 1000 feet behind me, at altitude before the bit rate starts dropping below 50.8 with the True RC X- Airs. This was at 700 mw though. I have been out 5 miles with them with no issues. They are expensive and fragile though.
It's gonna be very similar to chrystal HDs. see if someone else tested chrystalHD and Axii. first I asked a lot of companies and shops for a free sample of the axiiHDs - and then I gave up since the patch antenna based combos are all pretty similar. for me the chrystals still stand out because they dont (I mean they dont protrude the faceplace because they're behind it :)
ah, now I understand your prior comment. with the v2 goggles and DJI drone, I dont think the iFlight patches would work great. you definitly need to set transmission to 5.8 fixed if you wanna use iFlight chrystal for example - because if DJI drone decides it wants to use 2.4ghz those antennas will not work great ;)
As noted by others, my assumption about the 7 turns not performing well is due to them being so narrow beam and angled up away from your target. And that brings us to the VAS Cyclops performing so well off center. That is one of the selling points of VAS "Crosshair" style antennas. He has a whole video on how his antenna's wide beams allow you to do the "Stevie Wonder". The 7 turn is an example of how you can go too narrow to be practical for a head mounted system. My 5 turn do seem to still be practical though, and they perform slightly better than my VAS Cyclops v1.
I agree, thought the same myself - on video the angle looks quite extreme - there, while testing I dont think I aimed so high - but might be the case. 5turn a bit above VAS Cyclops aligns with my expectations - good to hear they are a good compromise betwee enough reach and convenience :) I also plan on testing the cyclops v2's claimed penetration skillz (through some wood distance)...
@@Rcschim Seems like when you previously did tests with standalone crosshairs, they didn't beat anything. To me, the VAS makes a good all-around antenna compared to like a patch. You can almost use a VAS as an omni assuming that any flying behind or above you rarely is long distance or a situation that needs penetration. But,... the helicals do the same thing and do it better.
simple answer, why dji has signal at 2.3km, and truerc and victory has no - DJI stock antenna 2.5Db gain , when truerc 1.9 and vas only 1.6. Intersting to compare dji stubby with foxeer stubby) Which antenna was used at transmitter in this test? I think that exactly the same test would be more realistic(to real flying), but at a shorter distance between the receiver and transmitter and with an obstacle between them (forest or house). A smaller distance would cease to matter the difference in the gain of different antennas, but the quality of the antenna would play a stronger role (SWR, Radiation Efficiency)
Hi, thanks for your feedback! TX Antennas were stock DJI fullsize Airunit ones (as seen here at 1:11 ruclips.net/video/RQML-azG4bQ/видео.html) So you think that highest gain is only one metric for a good antenna - but SWR,... might be better on those TrueRC or VAS Stubbies... Good idea. Probbably a forrest barrier setup would make sense. or a concrete building - since this represents a bando and all the reflections. In my last test (posted this weekend) I liked that the DJI FPV Racer has distance and bitrate in ONE SRT file. I could nicely get this into a pivot chart in excel and have an average value of bitrate at each meter of distance I flew. I think about making this my new standard test method (should also be possible with OpenTX Telemetry logs).
Hi Mario, nice and detailed test as usual, I'm also puzzled by the result that the 3 and 7 turn helicals have similar bitrates at 25mw, i'd be curious to see if, scaling up the output power of the trasmitter till the maximum, the results remain the same or it will begin to differentiate.... that would be important because also in my tests i'm generally using the 25mw power output, but if that is not representative of what happens when i subsequently switch to 1200mw in the real fligth, then i would need to change my test strategy. Also, I recommend more then 5 seconds for the the recordings, i have noticed that there are often oscillations in the bitrate even in fixed scenarios.. one minute should be enough to take care of the variance.
I have a friend starting to fly on V2 stock antennas and he gets bad dropouts and sometimes no recovery until he fully returns to home point. A test between V1 and V2 antennas with an air unit would be enlightening!
Maybe because the v2 antennas are amde for the dji drone, so they're dual band and linear polarised, did your friend switch to a lhcp single band antenna? Or did his problem resolve itself
I found that the V2 goggles stock antennas with DJI AirUnits gets me best range. This isnt true for my V1 goggles with its stock antennas. I was told the Stock V2 antenna aren't CP but are linear. Which makes sense because V2 stock Goggles antennas are dual band. What's strange is DJI AirUnits use LHCP on its AirUnits! So my V2 goggles stock linear antennas seem to work well with Stock AU CP which is odd to me
Hi, ich schaue schon länger deine Videos und finde sie sehr informativ! Vielen Dank für die vielen Stunden die du immer in die Videos steckst!! Ich habe mir nach einem Jahr analog jetzt die DJI FPV Goggle V2 gekauft und fliege mit einer Air unit. Die Antennen auf der Brille und am Quad sind beide rhcp. Ich benutze eine Patch Antenne und zwei Stubbies. Gibt es denn bei der V2 Version auch eine Anordnung der Antennen, die eine bessere Reichweite ermöglichen? Vielen Dank!
Hi, danke! Die V2 Anordnung hab ich leider noch nicht getestet. Entweder ist die Anordnung auf V2 Goggles im V1 Mode gleich wie auf V1 Goggles (weil das vermutlich Software bezogen ist) oder es ist so diagonal wie es zb. MadsTech zu den V2 goggles beschreibt (gibts hier ruclips.net/video/1jxTidSRXD0/видео.html ) Aber wie gesagt, bin noch nicht überzeugt, ob V2 Antenna Konfig nicht einfach nur im V2 Mode (also mit der DJI FPV Drone) so funktioniert. Hoffe daß ich das bald mal testen kann. Heute Abend siehst warum ich in den letzten Tagen relativ beschäftigt war :)
Guten...I don't speak german... You are the king of the antenna test, but what if the best way to connect the iflight crystal patch and stubbies on the V2 please? Stubbies on the top? Bottom? Mix one on top right, bottom left... Thank you for your time.
Thanks, I don't know yet, didn't have the time for testing this. Check gal Kremer he tested it on a mavic. I feel it is not so important in the v2, looks like they are setup better.
Hey , I have try by myself the iflight crystal antenna and I foud they was not better than stock antenna . I have tried with 25mW , flying at 120m altitude in front of me : with the stock antenna I can fly to 1400m and the HD become orange into the googles ;with iflight the HD become orange around 850m .So I have sold the iflight (I had bought for V1) .
hi, maybe you sold them too early... the signal indicator is not good for judging the range I noticed. goes red way too early. you need to watch for the bitrate you get...
You are so freaking scientific. I love your videos! So intriguing. Only if you have a moment. I'm new to the DJI equipment. My Betafpv 95 Hd is on a FrSky receiver. what do I do/change to use my DJI controller. Just remove the FRSky receiver and bind my DJI controller or do I change anything in Betaflight? Thanks for any help!!!
Thanks! probbably your FRSky RX is connected to your copters FC with 3 cablese (red,black for power, the thrid - sometimes white or yello for signal - sbus). you need to de-solder the signal and black from the FRSky RX and solder it onto caddx vista unit SBUS and GND ports. it's a bit small.... on BF you need to set Receiver to serialRX (if not already) and set it as sbus mode. on the PORTs tab you need to find out which UART is used for SBUS and enable Seriel RX switch on this (but this should already be correct since FRSky used it as well. hope this helps - if not try to find a tutorial - look at oscar liangs blog for example - or search for PINOUT of your copters FC. good luck!
Do you have the TrueRC X--airs? I think those would be best for long range at 0° in front of you but I would really like to see how do they compare to stock omnis at 45° and 90° I read the specs but real life testing would be great.
Hey RC shim, What if you put the camera on something that moved in front of the camera so you can see any glitches/pauses in addition to the pixelation?
Great content - always best quality tests! I just bought DJI FPV googles v2 (still waiting on UPS package with CineLog 35). I have a question - Can I turn ON DJI googles WITHOUT antennas? I know that two are RX and two are TX. Is there a possibility to fry the googles when I for example just want to watch the recordings without installing the antennas?
There are rumors that DJI has them ports protected so they won't take harm running without antennas. I also had the goggles running without antennas during 5min update process a few weeks ago and found no issue afterwards. However I'd not use them w/o antennas all the time. Rather get some of the really small stubbies (be it the iflight, or the also quite small and sexy trueRC ones). They can stay on forever and while they are much smaller they have the same performance as the stock DJI ones.
@@Rcschim Good point that patches are smaller - I already have iFlight Crystal Patches in the box but still waiting for the drone to arrive to test the stock DJI antennas first for few days and then switch to iFlight ;) Thanks for your reply I really love your channel and most importantly that you are really answering people in the comments with valuable information. When I accidentally turned on my googles without antennas (I was scared as hell) I immediately thought about posting a question here :)
Maybe one more question - because I didn't activated the googles yet. Can I deactivate them when I'll be potentially selling them in the future? I can't find much information other than just "no" on some dji forum. Will my email or personal data will be stored in the googles?
@@Rcschim It looks like it's all about warranty ;) MadsTechRC's answer: Your personal details are not stored on board. Basically the activation is for warranty. Once done you can’t undo it. All you need to do before sale is perform a full reset and the next owner will be able to use with their own DJI account.
great video! Question, what would be the best position for crytals, to connect only to the RX (top left, bottom right), or crystal up and omni down, or Crystal down and omni up?
Great information, was the test using v1 goggles or v2? With the v2 goggles having a different antenna Tx/Rx layout than the v1s do you think the test results would be the same or much different do to the antenna Rx/Tx layout?
what about the health risk having all those strong signals around your head ?? Any ways to connect antennas with cable, specially when I sit on the car with cable that I can actually put on the car roof?
From my research there is no health risk (and I take health concerns serious!). You have to distinguish between ionizing and non-ionizing radiation. UV light for example is ionizing, (it shoouts our IONs from your atoms and thus can harm you) Gamma rays from nuclear powerplants shoot aways parts of your DNA - this is harmfull ;) Non ionizing for example: your microwave. All it does: it MOVES your atoms (or your food) which causes heat. So mobile phones, wifi etc. will only heat up your ear / head slightly. If you wanna put it to an extreme: wearing the DJI goggles blocks a lot of UV rays from the sun on your face - so it's actually more secure wearing the goggles ;) hope this helps, I think J Bardwell made a video coming to the same conclusions a while ago.
Do you think the lower DBI of the VAS Stubbies might be the reason it doesn't reach as far? I wonder in typical freestyle flying if they'd actually be better because of the lower DBI and better coverage of the antennas
Let's see - I have a few really good ideas how to test Antennas in practical flights AND have good, compareable measurements. If this works out well, I can retest all of those antennas. I wasn't happy with the VAS stubbies ;)
@@Rcschim yeh it was pretty dissapointing. I just wonder what went wrong. I noticed they are 1.8ish dbi compared to the 2.5 dbi stock and the 3 dbi iflight crystal stubbies. VAS makes arguably the best analog antennas so I just don't understand why they'd perform so poorly here.
yes, sure. things to consider: DJI uses LHCP (left polarised or linear antennas) most analog FPV Antennas were RHCP don't mix Left and right antennas - else you get poor signal strength (range) 2nd: DJI uses mmcx connector on the airunit, ufl on the vista (the smaller airunit) and the goggles use RP-SMA (reverse polarity) most of my analog antennas were "normal" SMA (with hole or with centerpin) so I had to buy SMA to RP SMA Adapters so I could use (and test) all the old antennas on the DJI goggles. check these videos: ruclips.net/video/MUtWCsBlCks/видео.html (at 4:32 you see the adapter) but hey, from my experience, I'd use something like the iFlight ChrystalHD + their stubbies (on top) on the goggles and the stock DJI airunit TX antennas if you need more range and can spend a little more, check the helicals that Henrik makes by hand (4 helicals) ~ 100usd (helicals to be found here: ruclips.net/video/1BrBAZeicZ8/видео.html)
Is this gonna be the same on the v2 or are they completely different? Just got into digital and got v2. Mainly fly light acro and cruising, but curious about long range or at least mid range. Also how do these hold up in urban environments with multiple signals running everywhere.
I would exchange the stock V2 antennas for at least 4 iFlight stubbies (because they're cheapest) or something similar. the V2 antennas are dualband and said to be horrible at 5.8ghz only. The V2 goggles tho - I'm still not sure (and it's hard to test) if the V2 goggles in our V1 mode (DJI HDL) act any different than V1 goggles in V1 mode :)
Dann funktionieren auch die normalen Antennen. Wie schlecht die v2 sind, wenn man sie für die airunit nimmt, hab ich noch nicht getestet. Sie sind jedenfalls für 5.8 und 2.4 ausgelegt, die v1 nur für 5.8 Ist eine Idee für ein test video, danach kann ich es dir beziffern;)
yes, I do think so. Also on the 3turn helicals. But thing is- if you fly away further, the bitrate drops and I get nervous. I heard that BR gets better than again - so we just need to rely on GPS RTH and enough battery and try ;)
@@uscskierbro great - sounds like a plan :) in the meantime check this user: ruclips.net/user/fabyt68 he also has a 7" chimera and longrange ambitions :)
hehe, danke erstmal. Sinnlos find ich's nicht, die große Reichweite heißt ja auch, daß der Link innerhalb der erlaubten Reichweite stabiler ist... zum Thema verboten: ich schau mir ja auch gern Auto-Testberichte an, wo die Kollegen aus DE knapp 300 oder mehr auf der Autobahn fahren. Für uns Österreicher sinnlos weil verboten, aber...
I was using the v1 goggles here!
hey i got a little interference drop out on my nirvana today.. anyway i'm ordering tbs micro tomorrow, only had 700mwand still got a radio drop at 1km. otherwise i'm blown away by the goggles, so nice to see everything, but i do feel like i need to adjust, ps. 50mbs all the way even on 500mw.
how will the iflight crystal do on the V2 goggles? if there is a difference, what will it be since the V2's do both 2.4 and 5ghz? Thanks! :)
@@noforyoutubepremium3108 v2's only do dyal band with the dji drone, when you use them for normal acro dronesit uses old software which is 5.8ghz only
@@noforyoutubepremium3108 for DIY drones DJI HDL V1 mode: it will be similar I guess (but I still need to test this aspect)
in V2 mode (with the DJI Drone) it can work if you set the transmission to 5.8 only mode. Then the gain should be similar to what we see on V1 mode. But honestly: if you're in fcc mode, you are perfectly fine with the stock antennas! This Occusync3 is really good. Very sharp - almost like 1080p resolution all the time (except if you're really far out or behind stuff).
greets, Mario
@@Rcschim Thanks Bro! Forget the DJI Drone - Don't own it, won't buy it! ;)
So, if I read you right, you're saying unless you fly long range, or behind a lot of trees, buildings, etc. the factory antennas are fine. If I do fly behind a lot of trees, buildings, etc. but not far away, the stock antennas will be ok, but if I want more penetration though objects, I think the iFlight Crystal antennas are best for me...because I want low profile, ease of storage, convenience, and a decent - non rip off price! (ALL 4 stubbies products, I'm talking to you!) lol =(:^)-
That's an impressive and comprehensive test Mario. These tests take a lot of time and efforts...
Thanks Gal, means a lot from you - your tests are also really good and work intense!
Did I read right that the stock omnis beat all the other stubbies?
Yep, at least in terms of range here. On 200mw it was close. I should spend more time taking longer samples...
Oh lord the way you turn the goggles down and the lenses directly into the sun is giving me serious anxiety here 😅
no goggles were harmed in the making of this video :)
@@Rcschim that's a relief 😉 great testing by the way, thanks for your efforts
@@Drone-Pilot Don't be so sure about that. I've heard plenty of reports from people on rcgroups that they burned pixels in their DJI goggles. ALWAYS be careful with any goggles! Don't take the chance!
Thank you for taking the time and testing all the antenna interesting informative and practical really smart 🤓👍
Fantastic content. For real testing what we all want to know
Thanks rcschim for your work. This gives a better direction on choosing antennas
Hello RCSchim! Good job! Thanks for your test again! Surprisingly stock omni is similar to TrueRC stubbies.
Thanks RC for everything you do and your valuable time spent.. 😁
Fantastic testing, Mario! Thanks a lot! 😃
Pretty interesting results!!!
Stay safe there with your family! 🖖😊
Thanks Mario!
Österreichische Qualitätsarbeit :) gut gemacht
Danke!
Great simple comparision. Nice presentation of practical info.
Curious if tower in background is electric, or a cable-car tower? Probably has no effect, but I'm always curious what effect metal structures have on beam patterns.
cool, i was out today first real flight with dji v2's, its pretty amazing, amazing penetration on og dual band at 700mw didnt even see a drop on 50mbs 100 yards away behind two rows of trees.
So do I not need to upgrade the v2 antennas? I was worried because they're linear polarised and dual band instead of lhcp and single band
@@definingslawek4731 no, i fly with lhcp on the vista and two iflight stubbies and two original v2 linears, i can't feel any difference, wait till you have spare cash before you upgrade.
I think you said you were using the v2 goggles? Just confirming. ;)
I think the iFlight Crystal is the huge winner here! Super compact and great looking and the ability to leave them on all the time. Really impressed with the results with 200mw! I'll never use 25mw, so 200mw is meaningful to me. Now, I wonder what they would do with an extender put on to get the omni's up higher and sitting where you have found that omni's perform best - with the top parallel to the ground (straight up and down). I question how any of these omni's do at an angle compared to straight up. I also wonder how the long stem, to get the omni above your head, would improve reception. Those were the hot antenna when analog was going strong.
Trying an "Economy Test", that would be really interesting, is "stuff in the bag" antennas! ha! Like two of the red Triple feed Patch ($10) that are open source Maarten Baert antennas. They do RHCP or LHCP too! Then for omni's use two Foxeer Lollipop's as they are also very common and low cost. This would tell us if these expensive antennas are really worth buying or if "stuff in the bag" we already own would work just as well.
I superb test, as always my long distance friend! I think if I lived in the same town as you, I'd be up there helping you every bit of the way through your extremely interesting tests! But, I am thousands of miles away in Oregon, USA. lol Oh well... :)
Nope - these were the V1 goggles!
if you use an extension cable you will loose some DBs alone there on the way (once I saw 50% loss by using 3m cable - of course it's less if the cable is shorter).
we could use an RPSMA to SMA adapter + 45° (up) angle adapter and then a conventional SMA LHCP antenna - could work - but I fear these adapters also cost a bit of DB...
What another excellent video!
I'm still using the V1 goggles with foxxer 3 (the long ones) for when flying over 2km.
Cheap but effective.
Interesting their seems to be a different average between the V1's and V2's
thanks for doing this stuff i always look forward to seeing a vid from you
Thanks for testing. Minor note: the way you placed your hands may be blocking some of the signal during the 45 degree tests, and the Crystal SMA connectors dangling in front of the lower stubbies isn't ideal either.
Thanks for feedback. With limited time for those tests there are many little flaws always :) that's why I never claim my tests to be scientific :)
if I try to treat all test candidates equally as bad - it should even out :)
I like the way this was very well put together.
Thank you again for the grate video Mario. You totally rock mate !
You do such a great job on these info vids. Thank you mah friend.
Thanks man, and you do great on appreciative comments ;)
Great stuff, I think the stock omnis did well because they are higher gain.
Would be interesting if you could include the V2 antennas.
Those stock antennas offer the best bang per buck for sure. I sometimes wonder if we could have 4x 20 turn helical with a motorised antenna tracker connected to mavlink and then get the best of both. Full 360° coverage and high gain lobe sensitivity.
Great, thx for the big effort!!!
The 7T helicals performed poorly because your vertical alignment was poor -- ie: they were pointed at the sky so the transmitter was *below* the beam. And, because the 7T beam is much narrower, the effect was less pronounced with the 3T.
Yes and ontop of that the testing location is ekevated above the airunit location. But also the results were suprising for the other antennas too. Stock beating stubbys?
I think more sample time is needed, the signal can be quite unstabile and jumpy for a few seconds when moving around the goggles....especially when the hands are close to the antennas, even if not blocked.
Elevated
@@SLINGSHOTandMOLOTOWS I'm not surprised that the stock beat the 3rd-party stubbies. The DJI antennas are not at all bad and I think other companies are trying to create a need where one does not exist. All you will gain from 3rd-party stubbies is a more compact goggle setup while the antennas are installed.
@@xjet I was victim to this marketing gag of stubbies as well ;) But the compact factor is a good thing. plus you dont wear out your SMA conncetors by unscrewing the stock subbies every time you use them.
A shame that I've pointed the helicals up so much (but I think it looks worse on video than it actually was). Greets, Mario
@@Rcschim accually I think its more the short sample time that gave the surprising results. The vas had kind of the same amount of up angle. And also the nature of antenna testing, results are usually pretty unpredictable.
I also would like to see you test the x-Airs. I have flown 1000 feet behind me, at altitude before the bit rate starts dropping below 50.8 with the True RC X- Airs. This was at 700 mw though. I have been out 5 miles with them with no issues. They are expensive and fragile though.
Great test! Just wish you had the Axii HD to test.
It's gonna be very similar to chrystal HDs. see if someone else tested chrystalHD and Axii. first I asked a lot of companies and shops for a free sample of the axiiHDs - and then I gave up since the patch antenna based combos are all pretty similar.
for me the chrystals still stand out because they dont (I mean they dont protrude the faceplace because they're behind it :)
For me , it was with the V2googles and the DJI drone
ah, now I understand your prior comment. with the v2 goggles and DJI drone, I dont think the iFlight patches would work great. you definitly need to set transmission to 5.8 fixed if you wanna use iFlight chrystal for example - because if DJI drone decides it wants to use 2.4ghz those antennas will not work great ;)
Please test the DJI Goggles V2 Antennas vs. TrueRC Duality Antennas
As noted by others, my assumption about the 7 turns not performing well is due to them being so narrow beam and angled up away from your target. And that brings us to the VAS Cyclops performing so well off center. That is one of the selling points of VAS "Crosshair" style antennas. He has a whole video on how his antenna's wide beams allow you to do the "Stevie Wonder". The 7 turn is an example of how you can go too narrow to be practical for a head mounted system. My 5 turn do seem to still be practical though, and they perform slightly better than my VAS Cyclops v1.
I agree, thought the same myself - on video the angle looks quite extreme - there, while testing I dont think I aimed so high - but might be the case.
5turn a bit above VAS Cyclops aligns with my expectations - good to hear they are a good compromise betwee enough reach and convenience :)
I also plan on testing the cyclops v2's claimed penetration skillz (through some wood distance)...
@@Rcschim Seems like when you previously did tests with standalone crosshairs, they didn't beat anything. To me, the VAS makes a good all-around antenna compared to like a patch. You can almost use a VAS as an omni assuming that any flying behind or above you rarely is long distance or a situation that needs penetration. But,... the helicals do the same thing and do it better.
simple answer, why dji has signal at 2.3km, and truerc and victory has no - DJI stock antenna 2.5Db gain , when truerc 1.9 and vas only 1.6. Intersting to compare dji stubby with foxeer stubby)
Which antenna was used at transmitter in this test?
I think that exactly the same test would be more realistic(to real flying), but at a shorter distance between the receiver and transmitter and with an obstacle between them (forest or house). A smaller distance would cease to matter the difference in the gain of different antennas, but the quality of the antenna would play a stronger role (SWR, Radiation Efficiency)
Hi, thanks for your feedback! TX Antennas were stock DJI fullsize Airunit ones (as seen here at 1:11 ruclips.net/video/RQML-azG4bQ/видео.html)
So you think that highest gain is only one metric for a good antenna - but SWR,... might be better on those TrueRC or VAS Stubbies... Good idea. Probbably a forrest barrier setup would make sense. or a concrete building - since this represents a bando and all the reflections.
In my last test (posted this weekend) I liked that the DJI FPV Racer has distance and bitrate in ONE SRT file. I could nicely get this into a pivot chart in excel and have an average value of bitrate at each meter of distance I flew. I think about making this my new standard test method (should also be possible with OpenTX Telemetry logs).
Thanks, very good test
Hi Mario, nice and detailed test as usual, I'm also puzzled by the result that the 3 and 7 turn helicals have similar bitrates at 25mw, i'd be curious to see if, scaling up the output power of the trasmitter till the maximum, the results remain the same or it will begin to differentiate.... that would be important because also in my tests i'm generally using the 25mw power output, but if that is not representative of what happens when i subsequently switch to 1200mw in the real fligth, then i would need to change my test strategy. Also, I recommend more then 5 seconds for the the recordings, i have noticed that there are often oscillations in the bitrate even in fixed scenarios.. one minute should be enough to take care of the variance.
Fantastic review
I have a friend starting to fly on V2 stock antennas and he gets bad dropouts and sometimes no recovery until he fully returns to home point. A test between V1 and V2 antennas with an air unit would be enlightening!
Maybe because the v2 antennas are amde for the dji drone, so they're dual band and linear polarised, did your friend switch to a lhcp single band antenna? Or did his problem resolve itself
@@definingslawek4731 yes, he switched to some TrueRC omni options and it seems better
great stuff, thanks for your effort.
I found that the V2 goggles stock antennas with DJI AirUnits gets me best range. This isnt true for my V1 goggles with its stock antennas. I was told the Stock V2 antenna aren't CP but are linear. Which makes sense because V2 stock Goggles antennas are dual band.
What's strange is DJI AirUnits use LHCP on its AirUnits! So my V2 goggles stock linear antennas seem to work well with Stock AU CP which is odd to me
Great test!!
Hi, ich schaue schon länger deine Videos und finde sie sehr informativ! Vielen Dank für die vielen Stunden die du immer in die Videos steckst!!
Ich habe mir nach einem Jahr analog jetzt die DJI FPV Goggle V2 gekauft und fliege mit einer Air unit. Die Antennen auf der Brille und am Quad sind beide rhcp. Ich benutze eine Patch Antenne und zwei Stubbies. Gibt es denn bei der V2 Version auch eine Anordnung der Antennen, die eine bessere Reichweite ermöglichen?
Vielen Dank!
Hi, danke! Die V2 Anordnung hab ich leider noch nicht getestet.
Entweder ist die Anordnung auf V2 Goggles im V1 Mode gleich wie auf V1 Goggles (weil das vermutlich Software bezogen ist)
oder es ist so diagonal wie es zb. MadsTech zu den V2 goggles beschreibt (gibts hier ruclips.net/video/1jxTidSRXD0/видео.html )
Aber wie gesagt, bin noch nicht überzeugt, ob V2 Antenna Konfig nicht einfach nur im V2 Mode (also mit der DJI FPV Drone) so funktioniert.
Hoffe daß ich das bald mal testen kann. Heute Abend siehst warum ich in den letzten Tagen relativ beschäftigt war :)
Guten...I don't speak german...
You are the king of the antenna test, but what if the best way to connect the iflight crystal patch and stubbies on the V2 please? Stubbies on the top? Bottom? Mix one on top right, bottom left... Thank you for your time.
Thanks, I don't know yet, didn't have the time for testing this. Check gal Kremer he tested it on a mavic. I feel it is not so important in the v2, looks like they are setup better.
Hey , I have try by myself the iflight crystal antenna and I foud they was not better than stock antenna .
I have tried with 25mW , flying at 120m altitude in front of me : with the stock antenna I can fly to 1400m and the HD become orange into the googles ;with iflight the HD become orange around 850m .So I have sold the iflight (I had bought for V1) .
hi, maybe you sold them too early... the signal indicator is not good for judging the range I noticed. goes red way too early. you need to watch for the bitrate you get...
When having the 7turns antennas, they are overgesprongen the target as they where angled slightly up.
Have you tried the double axxii antennas on the goggles with the iflight patch?
You are so freaking scientific. I love your videos! So intriguing. Only if you have a moment. I'm new to the DJI equipment. My Betafpv 95 Hd is on a FrSky receiver. what do I do/change to use my DJI controller. Just remove the FRSky receiver and bind my DJI controller or do I change anything in Betaflight? Thanks for any help!!!
Thanks! probbably your FRSky RX is connected to your copters FC with 3 cablese (red,black for power, the thrid - sometimes white or yello for signal - sbus).
you need to de-solder the signal and black from the FRSky RX and solder it onto caddx vista unit SBUS and GND ports. it's a bit small....
on BF you need to set Receiver to serialRX (if not already) and set it as sbus mode.
on the PORTs tab you need to find out which UART is used for SBUS and enable Seriel RX switch on this (but this should already be correct since FRSky used it as well.
hope this helps - if not try to find a tutorial - look at oscar liangs blog for example - or search for PINOUT of your copters FC. good luck!
@@Rcschim thank you so much!
Stock antennas always surprise me
Do you have the TrueRC X--airs? I think those would be best for long range at 0° in front of you but I would really like to see how do they compare to stock omnis at 45° and 90° I read the specs but real life testing would be great.
Hey RC shim, What if you put the camera on something that moved in front of the camera so you can see any glitches/pauses in addition to the pixelation?
Great content - always best quality tests! I just bought DJI FPV googles v2 (still waiting on UPS package with CineLog 35). I have a question - Can I turn ON DJI googles WITHOUT antennas? I know that two are RX and two are TX. Is there a possibility to fry the googles when I for example just want to watch the recordings without installing the antennas?
There are rumors that DJI has them ports protected so they won't take harm running without antennas.
I also had the goggles running without antennas during 5min update process a few weeks ago and found no issue afterwards.
However I'd not use them w/o antennas all the time. Rather get some of the really small stubbies (be it the iflight, or the also quite small and sexy trueRC ones). They can stay on forever and while they are much smaller they have the same performance as the stock DJI ones.
@@Rcschim Good point that patches are smaller - I already have iFlight Crystal Patches in the box but still waiting for the drone to arrive to test the stock DJI antennas first for few days and then switch to iFlight ;) Thanks for your reply I really love your channel and most importantly that you are really answering people in the comments with valuable information. When I accidentally turned on my googles without antennas (I was scared as hell) I immediately thought about posting a question here :)
Maybe one more question - because I didn't activated the googles yet. Can I deactivate them when I'll be potentially selling them in the future? I can't find much information other than just "no" on some dji forum. Will my email or personal data will be stored in the googles?
@@rfly-fpv sorry, I dont know... maybe Ian (MadsTechRC) knows - he has the most inside knowledge about DJI....
@@Rcschim It looks like it's all about warranty ;) MadsTechRC's answer: Your personal details are not stored on board. Basically the activation is for warranty. Once done you can’t undo it. All you need to do before sale is perform a full reset and the next owner will be able to use with their own DJI account.
great video! Question, what would be the best position for crytals, to connect only to the RX (top left, bottom right), or crystal up and omni down, or Crystal down and omni up?
I still use omni top and patches bottom. Will test again and also try see if v1 and v2 goggles are different...
Great information, was the test using v1 goggles or v2? With the v2 goggles having a different antenna Tx/Rx layout than the v1s do you think the test results would be the same or much different do to the antenna Rx/Tx layout?
I'm also interested in what the optimal antenna patern is on v2 goggles, cheers.
what about the health risk having all those strong signals around your head ?? Any ways to connect antennas with cable, specially when I sit on the car with cable that I can actually put on the car roof?
From my research there is no health risk (and I take health concerns serious!).
You have to distinguish between ionizing and non-ionizing radiation.
UV light for example is ionizing, (it shoouts our IONs from your atoms and thus can harm you)
Gamma rays from nuclear powerplants shoot aways parts of your DNA - this is harmfull ;)
Non ionizing for example: your microwave. All it does: it MOVES your atoms (or your food) which causes heat.
So mobile phones, wifi etc. will only heat up your ear / head slightly.
If you wanna put it to an extreme: wearing the DJI goggles blocks a lot of UV rays from the sun on your face - so it's actually more secure wearing the goggles ;)
hope this helps, I think J Bardwell made a video coming to the same conclusions a while ago.
Do you think the lower DBI of the VAS Stubbies might be the reason it doesn't reach as far? I wonder in typical freestyle flying if they'd actually be better because of the lower DBI and better coverage of the antennas
Let's see - I have a few really good ideas how to test Antennas in practical flights AND have good, compareable measurements.
If this works out well, I can retest all of those antennas.
I wasn't happy with the VAS stubbies ;)
@@Rcschim yeh it was pretty dissapointing. I just wonder what went wrong. I noticed they are 1.8ish dbi compared to the 2.5 dbi stock and the 3 dbi iflight crystal stubbies. VAS makes arguably the best analog antennas so I just don't understand why they'd perform so poorly here.
Hi RCSchim, is it possible to use analog 5.8GHz Antenna to the DJI V1 Goggles and its air unit?
yes, sure. things to consider:
DJI uses LHCP (left polarised or linear antennas)
most analog FPV Antennas were RHCP
don't mix Left and right antennas - else you get poor signal strength (range)
2nd: DJI uses mmcx connector on the airunit, ufl on the vista (the smaller airunit)
and the goggles use RP-SMA (reverse polarity) most of my analog antennas were "normal" SMA (with hole or with centerpin)
so I had to buy SMA to RP SMA Adapters so I could use (and test) all the old antennas on the DJI goggles.
check these videos: ruclips.net/video/MUtWCsBlCks/видео.html (at 4:32 you see the adapter)
but hey, from my experience, I'd use something like the iFlight ChrystalHD + their stubbies (on top) on the goggles and the stock DJI airunit TX antennas
if you need more range and can spend a little more, check the helicals that Henrik makes by hand (4 helicals) ~ 100usd
(helicals to be found here: ruclips.net/video/1BrBAZeicZ8/видео.html)
@@Rcschim thank you! = ) happy flying
👏
Is this gonna be the same on the v2 or are they completely different? Just got into digital and got v2. Mainly fly light acro and cruising, but curious about long range or at least mid range. Also how do these hold up in urban environments with multiple signals running everywhere.
I would exchange the stock V2 antennas for at least 4 iFlight stubbies (because they're cheapest) or something similar. the V2 antennas are dualband and said to be horrible at 5.8ghz only.
The V2 goggles tho - I'm still not sure (and it's hard to test) if the V2 goggles in our V1 mode (DJI HDL) act any different than V1 goggles in V1 mode :)
Wie schauts mit der V2 aus
Würde die Air Unit benutzen wollen
Soll ich hier dann die V1 Antennen kaufen oder die Originalen von der V2?
LG
Eher die der v1 oder besser stubbies von iflight oder trurc. Generell gefällt mir die Kombi crystalhd und stubbies.
@@Rcschim okay auch wenn ich nicht long range fliegen will sondern bissl auf der Wiese zwischen Bäumen usw
Dann funktionieren auch die normalen Antennen. Wie schlecht die v2 sind, wenn man sie für die airunit nimmt, hab ich noch nicht getestet. Sie sind jedenfalls für 5.8 und 2.4 ausgelegt, die v1 nur für 5.8
Ist eine Idee für ein test video, danach kann ich es dir beziffern;)
@@Rcschim Sehr cool danke!
In one of the other videos you said that you did find the true rc stubbies had 50% better performance than stock, but here it's the same?
Sometimes it's difficult ;)
I guess for pure range it's similar, but if there are some obstacles, the truerc perform better...
@@Rcschim Are the iflight omnis much worse than them?
Do you think the VAS Cyclops V2 can reach the theoretical 13.4km limit on 1200mw and 50mb?
yes, I do think so. Also on the 3turn helicals. But thing is- if you fly away further, the bitrate drops and I get nervous. I heard that BR gets better than again - so we just need to rely on GPS RTH and enough battery and try ;)
@@Rcschim Cyclops V2 in the mail and I built an 8400mAh li-ion pack to see how far I can get on my 7”. I’ll report back!
@@uscskierbro great - sounds like a plan :) in the meantime check this user: ruclips.net/user/fabyt68 he also has a 7" chimera and longrange ambitions :)
2,3km? Junge Junge, der Spotter muss ja echt gute Augen haben. Technisch - von dir gewohnt - verdammt gut ausgeführt - aber sinnlos, weil verboten....
hehe, danke erstmal. Sinnlos find ich's nicht, die große Reichweite heißt ja auch, daß der Link innerhalb der erlaubten Reichweite stabiler ist...
zum Thema verboten: ich schau mir ja auch gern Auto-Testberichte an, wo die Kollegen aus DE knapp 300 oder mehr auf der Autobahn fahren. Für uns Österreicher sinnlos weil verboten, aber...