I went to a junior college for an electronics tech AS, the electronics math teacher used to put me to sleep, it was really hard to stay focused, and they didn't have any other math teachers. They didn't want to let him go because he was close to retirement, that really sucked. This channel is far, far better.
You prolly dont give a shit but does any of you know a trick to get back into an instagram account? I stupidly forgot the account password. I would appreciate any tips you can offer me.
Thanks for the plug Bruce! But even more thanks for the explanations here. Didnt know how rc link ant.diversity was working! Everyone loves your whiteboard vids! You know what's the best advantage of your whiteboard? It's way easier to clean than your bench it seems :) (video idea: make a timelapse of yourself cleaning up your bench and then use this timelapse as a background on a greenscreen on your next bench vid. in the timelapse you should not be seen only stuff dissapearing...)
This is an excellent video, well explained, clearly explained, and above all enthusiastic. I wasn't necessarily interested in RC models but I will be watching purely for the excellence of your videos :)
As an additional data point, I use Fatsharks' Transformer headset with antenna diversity. The antennas that I started out with were a cloverleaf and an dipole. I noticed that at longer ranges, around .5 kilometer, I was getting interference and breakup. When I changed the dipole to a good patch antenna and as long as I was pointing the patch antenna at the quad, all the interference went away and I was getting a clear image. For me, in this case, antenna diversity seems to have made a dramatic improvement in signal strength. Not sure if the implementation of the antenna diversity circuitry is the same, or even similar, between Fatshark and Eachine, but in my case, it seems to be working very well.
Bruce, I'm pretty sure what they are doing is the first analog diagram you used. That would go along with the theory that I described in my review. There is a noticeable dropout that happens occasionally and my theory was that was when it was switching antenna. But it is really quick so for most FPVers it just one for frame of not perfect signal. For a hard core, full speed racer, it could be a disaster. But that is not who these are for. Thank you so much for this video, it will help a lot with something I have planned. Now I haven't seen all the reviews, but I haven't seen one that says they are the best thing ever. What they are is unique on the market, they are FPV Ski Goggles at a price point no one else has come close to. Still inferior to box goggles, but some people simply refuse to use box goggle.
There is a project going on RC Groups which is a DIY Compatible Frsky D8 receiver. It uses the HUB protocol, which I prefer instead of the newer X Protocol for several reasons. It can output SBUS (8Channels only) and PPM, as well as 8 PWM channels for connecting servos directly to it. It can be built using a couple different CC2500 RF modules that can be bought cheap from several places on the internet. It can be built with diversity, and this is the reason I'm posting here. As you can see on the video linked below, the diversity works really well. But contrary to what was said on Bruce's video, the receiver does NOT use RSSI to decide if the antennas should be switches or not. It uses lost digital packets/frames of information instead, and this turned out to be much more efficient than RSSI. This explains why the antennas didn't switch even though they were not in the ideal position and with my hand covering them (1.5Km). The reason was the signal was good and not many packets of information were being lost. When too many packets are lost, the antennas are switched and the second antenna will stay ON until a certain number of frames/packets are lost. This, unlike RSSI based switching, prevents the antennas switch from starting oscillating sometimes, which is not good. Anyway, here is one of the test videos I did using the DIY receiver and the STM32 multiprotocol module. Radio was a 9x radio with Ar9x upgrade board and Ersky9x as firmware, and was at home with antenna vertical just inside my bedroom in front of the window. The receiver was being tested at 1.5Km line of sight. Radio had a servo test program running all the time. ruclips.net/video/pVZtts5DoV0/видео.html www.rcgroups.com/forums/showthread.php?2124647-DIY-FrSky-TX-RX-Modules
For $100, I know I'm not getting true diversity. Heck, coming from Quanum Box goggles I'm willing to use these even with just one antenna if their implementation of antenna diversity sucks just so I can get a cheap pair of actual lightweight goggles! As far as FOV, many have said cutting down or getting rid of the thick face foam actually let's your eyes sit closer to the screen and makes the FOV better. Appreciate your review and agree with everything you said. These goggles are not great, but their excellent for people looking to get into the hobby without breaking the bank. Regardless of its shortcomings, it's still the best CHEAPEST option for FPV beginners!
circleofowls I agree. I haven't flown Fat Shark goggles, so what I'm I really comparing these too and missing in reality? Most of the bad reviews are coming from people who've flown fat sharks exclusively for years, so yeah, they are going to be subjective in comparison. Like I said, show me a good starter set of goggles, not box style, for $100 that are better for beginners who don't have the coin for Fat Sharks. HD3s are going to run close to $500 after you're done buying a receiver.
Got one question... there was an old diversity video that you were going to show us how to do a 3 or 4 receiver circuit... even showed the board with hopes of being able to buy the pc board ....but never completed the episode so we could build it ourself.Any hope of seeing that project finished?.. i really would like to build a diversity-tracking receiver rather than a servo tracking one... especially since I always fly within a 180 degree swath from where I sit. Something like a Quanum Overlord that can be roughly aimed by a simple servo controlled by a knob on the rc transmitter such as the Turnigy 9X and a second receiver used on the ground station.
Thanks for the simplified version of a sometimes overly complicated technology. Do you have a whiteboard video on FPV camera technology / terminology on the channel? TVL, CCD, CMOS, NTSC vs PAL in quads. Thanks!
I've never had access to a true diversity goggle. I started with Quantum box goggle, that worked good, and wanted a binocular goggle. This is when I discovered the Eachine EV100. I've been flying with them for more than six months now and their just awesome. Of coarse I haven't ever had a comparison to a big dollar option. I see no reason to struggle to come up with the big dollar option because the budget idem is kicking ass and taking names. Maybe the $500 models have $500 worth of better... I don't know, but I cant justify spending that kinda dough when I've got it as good as I do.
Hi Bruce, I run two antennas in parallel for my CB in my truck. They become directional when in parallel, so I can hear more in front and behind me but not so much to the sides. So, in the case of RC models, thats the opposite of what your looking for in diversity.
Antenna elements can be passively connected to each other in a way that makes sense, but it has nothing to do with diversity but modifying the gain and directional pattern of the antennas. Agreeably, on the goggles it would make very little sense. Keyword here is stacking antennas and antenna arrays, for those interested.
Hi Bruce. I think I've understood why sometimes I se a doubled image on my Eachine VR D2. The problem get fixed powering off and on but when it comes out while flying is annoing.
For the record (and this is 2019) I have the Eachine VR D2 Pro goggles, and using diversity, I get terrible flickering when it switches signals. When diversity is off, I get a normal (read: no flicker) picture.
What protocol is used by FPV goggle receivers (i mean the external receivers) ? i saw some receivers with some pins and I wonder what the pinouts are. I am planning of building my own fpv goggle using such external receivers but I just dont know what pins are what. Cant find any details about it on google. If you can discuss about it, I would highly appreciate it. Thanks
Hi Bruce, do you have any idea why frsky would have reduced the active element length on their xm+ and xsr receivers? They've gone from the usual 32mm approx to 21mm on xm+ and 25mm on the xsr. I contacted frsky & the answer they gave was 'to make it better for fpv'. It just seems to me like they're using less than 1/4 wave now on those receivers which I thought would reduce the signal reveived..
Stephen Gibb hmmm interesting I'm wondering because of that rotor riot where they tested different reciever and modded the xsr antenna and thanks for the input man
Hi Bruce. I'm just getting into fixed-wing FPV. Could you do a vid on setting up an antenna tracker system please. I live in a remote part of Australia, and the rules most people are stuck with, don't apply to me.
Rc model reviews. I fly 5 in racing drones. My first was a ready to fly drone, I wanted to get in cheap as possible and I fly radiolink at9 transmitter and a ad9 reciever. I modified my assntanea on the reciever of my drone by splicing 2 2.4ghz antenna. Orient st 90 deg apart. Keep in mind this is for my reciever and it's 2.4 not 5.8. I notice a vast improvement in my flight range without failsafe. Can u explain why this works well and the antenna diversity for 5.8 videofeed reciever does not. Or am I fooling myself and only have some variation in the mounting of my a team was or another explanation to thank for my added range. I realize this is not the same as diversity receivers on analog 5.8 Visio receivers. But be for I modify all my antaneas on my radiolink receivers I'd apreciate more knowledge on this topic. Love your videos been a subscriber for a long time.
I really need help with this. What is your recommendation on antenna diversity, should I use only one antenna or 2 of the same tipe, or can I use different antennas. Your advice would really help me a lot.
Joshua Bardwell reviewed a defect unit, all while he's -6 nearsighted so would not even be able to use it, even if it was a 100% functional unit. How can you say that is a good review?
What about circular polarization and diversity receivers? A good circularly polarized antenna eliminates the angle part of fade. But there's still the directional pattern.
Have a pair of EV100's. Pretty sure it does not use amplified to solve the antenna diversity issue. In testing with VTX in pit mode and different antenna types it seems to pulse between the antennas should both be getting enough of a signal. Seemed fine when using and flying with 2 others at the same time. With all different antenna types I tried, the included dipoles worked best then the model had a pagoda antenna. If I had a cheap way to send them to you to review, I would. I like the candour of your reviews.
Bruce what about putting one cloverleaf on a angle out forward and the other straight up would that work or use a very small pigtail on one of the antennas and have them at different levels and angles Bruce
Hi Bruce, is it possible to put a 2watt signal booster on both your tx antennas and the rx antennas? When using my flysky fs16s tx, I was getting 800m, now ive put a 2watt booster on the tx and a 7dbi antenna I can get at least 1.2km and as I get some telemetry back (battery voltage and signal strength) I was wondering if one of the cheap 2watt signal boosters on 2.4ghz could be attached to the rx antennas on the quadcopter, or would this fry the receiver? i.e a 2 watt signal booster on both ends?
Hey Bruce, how do they do antenna diversity in the VR D2s so well? It works amazingly well with no flickers, no blackouts! I've used the diversity feature with a patch to locate missing quads. Way better than this little FatShark monitor I have which just has crap reception, even when paired with FatShark antennas! Great video. Was hoping someone would do this. Would actually love to see someone do this with actual equipment. See if there is a quantifiable difference.
Your videos are great! I love them. A question: I have a VR006, which has the same "antenna diversity" receiver as the EV100 has. I use it only with one good antenna. A dummy load is on the other antenna connection and the "signal" is stronger and more stable with one antenna. Is that make sense? What do You think?
Wow,, There is so much to consider in FPV as with other componants, I have learned a lot from just a few minutes of watching this video. Very informative. I have a set of Eachine (Diversity) Goggles and they seem ok for the most part and I do get drop-outs and glitches on occasion. Im using clover leaf antennas too. I wonder myself if they are TRUE diversity. I have the EV800D. I would like to know if they are true diversity myself. Great video as usual. Thanks
specifically with rc diversity not video.. but maybe its the same.. but yeah, so is there every a downside to using diversity? is there ever a chance that using diversity could lead to drop outs when switch between receivers or will 2 antennas 2 receivers diversity always be better? thanks for the videos!
Thank you for this video Bruce... as always a fantastic learning video. However, I am seeing this video right after I received the goggles hehehe.... :) Ill let you work how they work out for me, bear in mind I am new to FPV, and will be crashing my EACHINE lizard95, hopefully not too far away from me
Another good video Bruce.Will be good to see other reviewers send there stuff after a review to get a good honest review without fear of being black listed from companies.Ausie Stu's wall must be running out of room hint hint
IM WONDERING WHAT CAMERA TO BUY: already bought the little box goggle /mirror type. says it comes with built in receivers,,, what kind camersa i need? .... im got blimp.. flys around homes i saleing!!!
Hi Bruce love your content. I'm still new to RC flight and learning a lot with every video so thank you. A quick question I have is about your flight status. I haven't been able to find an update video explaining. Did you ever get your exception to fly at the airfield? Just very interested to know what ever became of it. If you could point me to one of your videos that finishes the story, if you have one, that would be great. It has been sort of a cliff hanger for me. Thanks again for the great content. Take care!
Great video as usual, thank you! I know is pretty old video but is exactly was i was looking for! Now my question is what would it be the best combination of antennas for a set of goggles with a simple antenna diversity? I feel like when i use patch and omni the signal is worst then when i use 2 omni. Is that true?
Hmm. Whilst I appreciate, as always, your WB videos I want to wait to see some actual bench-testing of modern antenna diversity Rx systems..... In your simplified explanation you are, of course, right
I bought an Aomway diversity 5.8G receiver from Gearbest. It is crap! It does not tune in, it has lots of audio noise and I can not get a picture with OSD on any channel,. I have tried with to transmitters and another two receivers which work well together but the Aomway works well with neither. Is that just a diversity fault or a product fault?
Hello dear prefered knowledge bible, I have such a eachine « diversity » apparently VR009 eachine but looks like a FP009 , anyway, when I check the RP-SMA connector on it, one of the two is shorted, is it due to a switch or something ? Or is ot just faulty? I can add a link ton my video showing it.
would it be possible to rectify both input signals and feed the dc voltage to a comparator to operate a pair of flip flops to then choose which signal input reaches a threshold level first,some what like either an audio compressor or the feed back signal for a smps detects the dc voltage using a triangle wave level shift to control a series/shunt ellement. I'm spitballing and am not too familiar with radio ,though i've seen detectors that rectify signals also some signals are half wave rectified to obtain the audio signal,tank circuits schematics etc. I work on audio and am now getting interested in FPV,I bought a eachine novice 3 s/h on fleabay and now need to do the learning curve thing,P.I.T.A......TBH.
Love this stuff, where can I find a version with mathematical equations all over the board? lol, I am very curious to see some of the inner workings of how these systems work.
Here's a nice teardown of the Eachine goggles for you: fishpepper.de/2017/09/18/eachine-ev100-99-fpv-goggle-disassembly-components-pcb-pictures/ Quote about the diversity antennas: "Both antennas connect to the lower and upper left side of the PCB. Both signals go to a high frequency multiplexer (switch), passes a filter, passes another chip (amplifier?) and is filtered again before entering the trustworthy RTC6715 5.8GHz video receiver chip that everybody else uses as well. You can see some further passive components and some voltage regulators. The chip labeled S033 is probably a microcontroller handling the diversity switching and interfacing to the main CPU."
I'm curious about testing methodics for diversity quality. Also, in case of antenna diversity interesting thing is how to get best reception from the unit - using same antennas, different antennas (what effect it would have?), one antenna with dummy load, one antenna without. Personally I'm ok with no diversity for $100 ($150 not so much) as long as it is not making it worse:)
Hi Bruce. Interesting and informative video thank you. I wonder have you investigated how the fat shark diversity receivers work? The reason I ask is that they also use antenna diversity rather than two separate rx's. I'm guessing eachine is doing something similar
I had this early fatshark antenna diversity module. it was crappy! even the original single RX module worked better for me. back than I didnt understand what was going on - now with this video I feel like I understand it better - thanks Bruce!
RCSchim I've just upgraded to furious true-d 3.6 from fs div 2 (which didn't seem too bad to me but that's all I know). I'll be a disappointed if it's not an improvement!!!
Good job Bruce, I can't wait to see what you find out with Josh's set of goggles. Because of those fluff reviews you talked about, Eachine upped their prices by $50.00 for a set of goggles. It looks to me like they are just trying to do a big "money grab" before you and a couple of knowledgeable reviewers get to the truth on what's inside these magical goggles. It real easy to understand why they didn't send you a set. -- they are afraid of hearing the truth.
to be fair here: I think they had a really high number of orders even before the first reviews were out... and they wrote on their page that only during initial few days it would be 100$... but still - it appeared to be a better deal than it actually was...
RCShimm: I didn't know that they had publicized that the $100 price was an introductory offer. I need to rewatch your review and a few others before I critique a product. I do however have significant experience with cheap antenna diversity products like a diversity receiver that had only one cheap receiver yet claimed full diversity and that you could fly for miles and still get signal. I will be watching to see what Bruce finds out.
![Three Benefits of Using Multiple Antennas in Communications [Video 2]](http://i.ytimg.com/vi/tw0yD65viVI/mqdefault.jpg)
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
I wish you were my teacher when I was a kid - you are an awesome teacher
I went to a junior college for an electronics tech AS, the electronics math teacher used to put me to sleep, it was really hard to stay focused, and they didn't have any other math teachers. They didn't want to let him go because he was close to retirement, that really sucked. This channel is far, far better.
You prolly dont give a shit but does any of you know a trick to get back into an instagram account?
I stupidly forgot the account password. I would appreciate any tips you can offer me.
@Anders Jaiden instablaster :)
This is the first time I've seen antenna diversity explained well. Thank you!
I still come back to these videos once in a while for a refresher
I built your $2 diversity module back when you first did it......... still working great..... keep up the great work.
Big love for you Bruce
many would be lost without your wise guidance
Thank you so much for keeping the channel running despite the madness around you
Love your videos, you make hard topics easy to understand. Thanks
Couldn't agree more - great videos
Thanks for the plug Bruce! But even more thanks for the explanations here. Didnt know how rc link ant.diversity was working! Everyone loves your whiteboard vids! You know what's the best advantage of your whiteboard? It's way easier to clean than your bench it seems :)
(video idea: make a timelapse of yourself cleaning up your bench and then use this timelapse as a background on a greenscreen on your next bench vid. in the timelapse you should not be seen only stuff dissapearing...)
rcschim do more wing videos :D
Dont clean your desk ! its very comforting to see we are not alone ;-)
What would we do without you mate. Brilliant, many thanks.
Very nice explanation yet again, Bruce. Well done, keep it up and stay healthy. Greetings from The Netherlands
This is an excellent video, well explained, clearly explained, and above all enthusiastic. I wasn't necessarily interested in RC models but I will be watching purely for the excellence of your videos :)
Hey, glad I found your channel! Good to see another New Zealander making youtube videos about RC gear :)
As an additional data point, I use Fatsharks' Transformer headset with antenna diversity. The antennas that I started out with were a cloverleaf and an dipole. I noticed that at longer ranges, around .5 kilometer, I was getting interference and breakup. When I changed the dipole to a good patch antenna and as long as I was pointing the patch antenna at the quad, all the interference went away and I was getting a clear image. For me, in this case, antenna diversity seems to have made a dramatic improvement in signal strength. Not sure if the implementation of the antenna diversity circuitry is the same, or even similar, between Fatshark and Eachine, but in my case, it seems to be working very well.
Bruce, I'm pretty sure what they are doing is the first analog diagram you used. That would go along with the theory that I described in my review. There is a noticeable dropout that happens occasionally and my theory was that was when it was switching antenna. But it is really quick so for most FPVers it just one for frame of not perfect signal. For a hard core, full speed racer, it could be a disaster. But that is not who these are for. Thank you so much for this video, it will help a lot with something I have planned. Now I haven't seen all the reviews, but I haven't seen one that says they are the best thing ever. What they are is unique on the market, they are FPV Ski Goggles at a price point no one else has come close to. Still inferior to box goggles, but some people simply refuse to use box goggle.
There is a project going on RC Groups which is a DIY Compatible Frsky D8 receiver. It uses the HUB protocol, which I prefer instead of the newer X Protocol for several reasons. It can output SBUS (8Channels only) and PPM, as well as 8 PWM channels for connecting servos directly to it. It can be built using a couple different CC2500 RF modules that can be bought cheap from several places on the internet. It can be built with diversity, and this is the reason I'm posting here. As you can see on the video linked below, the diversity works really well. But contrary to what was said on Bruce's video, the receiver does NOT use RSSI to decide if the antennas should be switches or not. It uses lost digital packets/frames of information instead, and this turned out to be much more efficient than RSSI. This explains why the antennas didn't switch even though they were not in the ideal position and with my hand covering them (1.5Km). The reason was the signal was good and not many packets of information were being lost. When too many packets are lost, the antennas are switched and the second antenna will stay ON until a certain number of frames/packets are lost. This, unlike RSSI based switching, prevents the antennas switch from starting oscillating sometimes, which is not good. Anyway, here is one of the test videos I did using the DIY receiver and the STM32 multiprotocol module. Radio was a 9x radio with Ar9x upgrade board and Ersky9x as firmware, and was at home with antenna vertical just inside my bedroom in front of the window. The receiver was being tested at 1.5Km line of sight. Radio had a servo test program running all the time.
ruclips.net/video/pVZtts5DoV0/видео.html
www.rcgroups.com/forums/showthread.php?2124647-DIY-FrSky-TX-RX-Modules
Ever since I saw that I've been waiting for someone to explain what that meant. Thanks for the information!
We have a head of diversity in our HR department at work, I;m going to ask him which FPV antenna are best ;)
Alpha Dog hhaahahaha
You Sir get my vote for New Zealander of the year!
Hey you have 159,000 subscribers, WooooooW! Congrats! you deserve eacha and every one and then some.
Perfect explanation coming from an electronics background you are spot on
Another excellent coverage of the topic, looking forward to the next Simple Stuff Whiteboard Session
Great vid! I love to see you tear a clearview apart!
They did offer to send me a set but only on condition I didn't look inside -- so I said "no thanks".
RCModelReviews Thats a shame. And you are right. Nothing to review then'
Excellent information as always, you could never bore me with it, I'm wanting to know more.
Looking forward to Friday, Bruce......
I can't wait for you to take them apart!
Always wondered how diversity works. Great video! Thanks!!!
could you explain the differences between futaba protocols?
Eachine public enemy number ☝🏻 lol thanks for making sense 👍🏻 maybe Joshua learned something today lol you guys are a huge assist to the community 👏🏻
It simply very nice to heard you explanation.
For $100, I know I'm not getting true diversity. Heck, coming from Quanum Box goggles I'm willing to use these even with just one antenna if their implementation of antenna diversity sucks just so I can get a cheap pair of actual lightweight goggles!
As far as FOV, many have said cutting down or getting rid of the thick face foam actually let's your eyes sit closer to the screen and makes the FOV better.
Appreciate your review and agree with everything you said. These goggles are not great, but their excellent for people looking to get into the hobby without breaking the bank. Regardless of its shortcomings, it's still the best CHEAPEST option for FPV beginners!
I've been flying with my EV100's for about a week and I'm very happy with them. Until I find a
circleofowls I agree. I haven't flown Fat Shark goggles, so what I'm I really comparing these too and missing in reality? Most of the bad reviews are coming from people who've flown fat sharks exclusively for years, so yeah, they are going to be subjective in comparison. Like I said, show me a good starter set of goggles, not box style, for $100 that are better for beginners who don't have the coin for Fat Sharks. HD3s are going to run close to $500 after you're done buying a receiver.
10 months later we have EV800D with diversity, but is it true diversity?
Got one question... there was an old diversity video that you were going to show us how to do a 3 or 4 receiver circuit... even showed the board with hopes of being able to buy the pc board ....but never completed the episode so we could build it ourself.Any hope of seeing that project finished?.. i really would like to build a diversity-tracking receiver rather than a servo tracking one... especially since I always fly within a 180 degree swath from where I sit. Something like a Quanum Overlord that can be roughly aimed by a simple servo controlled by a knob on the rc transmitter such as the Turnigy 9X and a second receiver used on the ground station.
Outstanding video Bruce
What’s the best way to position the radio receiver antennas on a quad to maximize the diversity performance ?
Hello, At 2:55 you mentioned a diversity controller.
Well done Bruce!!!
I really like your videos, i watch your videos since 2015 , you are the best :D.
Hello, is there any conclusion on what antenna diversity are in Eachine EV100? I still cannot find the answer on internet.
Thanks for the simplified version of a sometimes overly complicated technology. Do you have a whiteboard video on FPV camera technology / terminology on the channel? TVL, CCD, CMOS, NTSC vs PAL in quads. Thanks!
I've never had access to a true diversity goggle. I started with Quantum box goggle, that worked good, and wanted a binocular goggle. This is when I discovered the Eachine EV100. I've been flying with them for more than six months now and their just awesome. Of coarse I haven't ever had a comparison to a big dollar option. I see no reason to struggle to come up with the big dollar option because the budget idem is kicking ass and taking names. Maybe the $500 models have $500 worth of better... I don't know, but I cant justify spending that kinda dough when I've got it as good as I do.
interesting bruce,would you be just as well running one antenna on these goggles
You did a great job as usual. Keep em coming.
Hi Bruce,
I run two antennas in parallel for my CB in my truck. They become directional when in parallel, so I can hear more in front and behind me but not so much to the sides. So, in the case of RC models, thats the opposite of what your looking for in diversity.
Thanks Bruce! Very interesting and informative.
Antenna elements can be passively connected to each other in a way that makes sense, but it has nothing to do with diversity but modifying the gain and directional pattern of the antennas. Agreeably, on the goggles it would make very little sense. Keyword here is stacking antennas and antenna arrays, for those interested.
hey Bruce, did you ever release a video of your diversity circuit, I would love to build it. great video. thanks mike
Hi Bruce. I think I've understood why sometimes I se a doubled image on my Eachine VR D2. The problem get fixed powering off and on but when it comes out while flying is annoing.
nice Joshusa Bardwell, looking forward to your view on the googles Bruce was looking at them @Bang good they were on pre order
I watched a couple of your videos and you explained a lot to me :)
would it be possible to put 4 Antenna and two diversity receiver ?
Thanks for the great explanation Bruce!
Very well put Bruce !!
Quick question: do you live in New Zealand? Just wondering because I am in Wellington ☺️
For the record (and this is 2019) I have the Eachine VR D2 Pro goggles, and using diversity, I get terrible flickering when it switches signals. When diversity is off, I get a normal (read: no flicker) picture.
Thanks for the little lecture. 😎👍 🛩
What protocol is used by FPV goggle receivers (i mean the external receivers) ? i saw some receivers with some pins and I wonder what the pinouts are. I am planning of building my own fpv goggle using such external receivers but I just dont know what pins are what. Cant find any details about it on google. If you can discuss about it, I would highly appreciate it. Thanks
Hi Bruce, do you have any idea why frsky would have reduced the active element length on their xm+ and xsr receivers? They've gone from the usual 32mm approx to 21mm on xm+ and 25mm on the xsr. I contacted frsky & the answer they gave was 'to make it better for fpv'. It just seems to me like they're using less than 1/4 wave now on those receivers which I thought would reduce the signal reveived..
jonc67uk yes Bruce I am also curious about this too
I think the main reason was that the receivers were struggling with the signal being too strong when right next to the transmitter.
Stephen Gibb hmmm interesting I'm wondering because of that rotor riot where they tested different reciever and modded the xsr antenna and thanks for the input man
I didn't have any problem with the xm+ with the correct length element, I've had 3 with no close range problems at all so that's a bit wierd..
I heard Trappy is looking for someone doing rc collision warning systems. Weren't you working on something like that?
Hi Bruce. I'm just getting into fixed-wing FPV. Could you do a vid on setting up an antenna tracker system please. I live in a remote part of Australia, and the rules most people are stuck with, don't apply to me.
Rc model reviews. I fly 5 in racing drones. My first was a ready to fly drone, I wanted to get in cheap as possible and I fly radiolink at9 transmitter and a ad9 reciever. I modified my assntanea on the reciever of my drone by splicing 2 2.4ghz antenna. Orient st 90 deg apart. Keep in mind this is for my reciever and it's 2.4 not 5.8. I notice a vast improvement in my flight range without failsafe. Can u explain why this works well and the antenna diversity for 5.8 videofeed reciever does not. Or am I fooling myself and only have some variation in the mounting of my a team was or another explanation to thank for my added range. I realize this is not the same as diversity receivers on analog 5.8 Visio receivers. But be for I modify all my antaneas on my radiolink receivers I'd apreciate more knowledge on this topic. Love your videos been a subscriber for a long time.
Good explanation Bruce, thanx
I really need help with this. What is your recommendation on antenna diversity, should I use only one antenna or 2 of the same tipe, or can I use different antennas. Your advice would really help me a lot.
+RCmodelReviews, perhaps purchase some of the cheapy eachine vr006, they claim to boast antenna diversity as well. Maybe even the same as the ev100?
What a perfect video at a perfect time
This was a fantastic video sir!
Joshua Bardwell reviewed a defect unit, all while he's -6 nearsighted so would not even be able to use it, even if it was a 100% functional unit. How can you say that is a good review?
He handed it over to other people to help review it and they didn't like them either. Too small FOV
Why would you hand over a defect unit? They can't judge anything by just looking a snow.
What about circular polarization and diversity receivers? A good circularly polarized antenna eliminates the angle part of fade. But there's still the directional pattern.
Are you saying that it’s best or even equal to having 1 antenna vs antenna diversity? Great vid and info breakdown
Love your work Bruce!
Have a pair of EV100's. Pretty sure it does not use amplified to solve the antenna diversity issue. In testing with VTX in pit mode and different antenna types it seems to pulse between the antennas should both be getting enough of a signal. Seemed fine when using and flying with 2 others at the same time. With all different antenna types I tried, the included dipoles worked best then the model had a pagoda antenna.
If I had a cheap way to send them to you to review, I would. I like the candour of your reviews.
I love these episodes.
Bruce what about putting one cloverleaf on a angle out forward and the other straight up would that work or use a very small pigtail on one of the antennas and have them at different levels and angles Bruce
Hi Bruce, is it possible to put a 2watt signal booster on both your tx antennas and the rx antennas? When using my flysky fs16s tx, I was getting 800m, now ive put a 2watt booster on the tx and a 7dbi antenna I can get at least 1.2km and as I get some telemetry back (battery voltage and signal strength) I was wondering if one of the cheap 2watt signal boosters on 2.4ghz could be attached to the rx antennas on the quadcopter, or would this fry the receiver? i.e a 2 watt signal booster on both ends?
Hey Bruce, how do they do antenna diversity in the VR D2s so well? It works amazingly well with no flickers, no blackouts! I've used the diversity feature with a patch to locate missing quads. Way better than this little FatShark monitor I have which just has crap reception, even when paired with FatShark antennas!
Great video. Was hoping someone would do this. Would actually love to see someone do this with actual equipment. See if there is a quantifiable difference.
Your videos are great! I love them. A question: I have a VR006, which has the same "antenna diversity" receiver as the EV100 has. I use it only with one good antenna. A dummy load is on the other antenna connection and the "signal" is stronger and more stable with one antenna. Is that make sense? What do You think?
Wow,, There is so much to consider in FPV as with other componants, I have learned a lot from just a few minutes of watching this video. Very informative. I have a set of Eachine (Diversity) Goggles and they seem ok for the most part and I do get drop-outs and glitches on occasion. Im using clover leaf antennas too. I wonder myself if they are TRUE diversity. I have the EV800D. I would like to know if they are true diversity myself. Great video as usual. Thanks
Somebody knows any practical application for the digital TV?
specifically with rc diversity not video.. but maybe its the same.. but yeah, so is there every a downside to using diversity? is there ever a chance that using diversity could lead to drop outs when switch between receivers or will 2 antennas 2 receivers diversity always be better? thanks for the videos!
Thank you for this video Bruce... as always a fantastic learning video. However, I am seeing this video right after I received the goggles hehehe.... :) Ill let you work how they work out for me, bear in mind I am new to FPV, and will be crashing my EACHINE lizard95, hopefully not too far away from me
Another good video Bruce.Will be good to see other reviewers send there stuff after a review to get a good honest review without fear of being black listed from companies.Ausie Stu's wall must be running out of room hint hint
IM WONDERING WHAT CAMERA TO BUY: already bought the little box goggle /mirror type. says it comes with built in receivers,,, what kind camersa i need? .... im got blimp.. flys around homes i saleing!!!
4:18 ooh so this was what i was looking for Antenna DS
4:29 and yes again how it knows ...
Hi Bruce love your content. I'm still new to RC flight and learning a lot with every video so thank you. A quick question I have is about your flight status. I haven't been able to find an update video explaining. Did you ever get your exception to fly at the airfield? Just very interested to know what ever became of it. If you could point me to one of your videos that finishes the story, if you have one, that would be great. It has been sort of a cliff hanger for me. Thanks again for the great content. Take care!
Great video as usual, thank you! I know is pretty old video but is exactly was i was looking for! Now my question is what would it be the best combination of antennas for a set of goggles with a simple antenna diversity? I feel like when i use patch and omni the signal is worst then when i use 2 omni. Is that true?
Great video!!! Can you explain how the Spektrum Transmitters use two antennas on their Dx9, etc. Thanks
Hmm.
Whilst I appreciate, as always, your WB videos I want to wait to see some actual bench-testing of modern antenna diversity Rx systems.....
In your simplified explanation you are, of course, right
I bought an Aomway diversity 5.8G receiver from Gearbest. It is crap! It does not tune in, it has lots of audio noise and I can not get a picture with OSD on any channel,. I have tried with to transmitters and another two receivers which work well together but the Aomway works well with neither.
Is that just a diversity fault or a product fault?
Hello dear prefered knowledge bible, I have such a eachine « diversity » apparently VR009 eachine but looks like a FP009 , anyway, when I check the RP-SMA connector on it, one of the two is shorted, is it due to a switch or something ? Or is ot just faulty? I can add a link ton my video showing it.
Great video, all ways love watching your stuff, keep it up.
Silly question, but is diversity possible on the vtx as well?
would it be possible to rectify both input signals and feed the dc voltage to a comparator to operate a pair of flip flops to then choose which signal input reaches a threshold level first,some what like either an audio compressor or the feed back signal for a smps detects the dc voltage using a triangle wave level shift to control a series/shunt ellement.
I'm spitballing and am not too familiar with radio ,though i've seen detectors that rectify signals also some signals are half wave rectified to obtain the audio signal,tank circuits schematics etc.
I work on audio and am now getting interested in FPV,I bought a eachine novice 3 s/h on fleabay and now need to do the learning curve thing,P.I.T.A......TBH.
worked with Verizon for 14 yrs as a cell tech. I couldn't have said it better myself.
Hi Bruce, great vid, thanx. Try cleaning your whiteboard with a papertowel and just some water, might help.
still teaching us. thanks.
Love this stuff, where can I find a version with mathematical equations all over the board? lol, I am very curious to see some of the inner workings of how these systems work.
You just save me $100 bucks on the Eachines! Thank you!
Here's a nice teardown of the Eachine goggles for you: fishpepper.de/2017/09/18/eachine-ev100-99-fpv-goggle-disassembly-components-pcb-pictures/
Quote about the diversity antennas: "Both antennas connect to the lower and upper left side of the PCB. Both signals go to a high frequency multiplexer (switch), passes a filter, passes another chip (amplifier?) and is filtered again before entering the trustworthy RTC6715 5.8GHz video receiver chip that everybody else uses as well. You can see some further passive components and some voltage regulators. The chip labeled S033 is probably a microcontroller handling the diversity switching and interfacing to the main CPU."
Damn the explanation is really great
I'm curious about testing methodics for diversity quality. Also, in case of antenna diversity interesting thing is how to get best reception from the unit - using same antennas, different antennas (what effect it would have?), one antenna with dummy load, one antenna without. Personally I'm ok with no diversity for $100 ($150 not so much) as long as it is not making it worse:)
Hi Bruce. Interesting and informative video thank you. I wonder have you investigated how the fat shark diversity receivers work? The reason I ask is that they also use antenna diversity rather than two separate rx's. I'm guessing eachine is doing something similar
I had this early fatshark antenna diversity module. it was crappy! even the original single RX module worked better for me. back than I didnt understand what was going on - now with this video I feel like I understand it better - thanks Bruce!
RCSchim I've just upgraded to furious true-d 3.6 from fs div 2 (which didn't seem too bad to me but that's all I know). I'll be a disappointed if it's not an improvement!!!
very good pedagogy
Thanks Bruce
Good job Bruce, I can't wait to see what you find out with Josh's set of goggles. Because of those fluff reviews you talked about, Eachine upped their prices by $50.00 for a set of goggles. It looks to me like they are just trying to do a big "money grab" before you and a couple of knowledgeable reviewers get to the truth on what's inside these magical goggles. It real easy to understand why they didn't send you a set. -- they are afraid of hearing the truth.
to be fair here: I think they had a really high number of orders even before the first reviews were out...
and they wrote on their page that only during initial few days it would be 100$...
but still - it appeared to be a better deal than it actually was...
RCShimm: I didn't know that they had publicized that the $100 price was an introductory offer. I need to rewatch your review and a few others before I critique a product. I do however have significant experience with cheap antenna diversity products like a diversity receiver that had only one cheap receiver yet claimed full diversity and that you could fly for miles and still get signal. I will be watching to see what Bruce finds out.
Awesome vid! Thanks for the great info!