Hi,

After my Micro Servo started working I made my first flight test with my cheap FPV set up.

Here the video 

What is the culprit for the interference?

Vibrations?

Should I test more transmission channels?

I did not change anything there. As the camera was delivered I connected the Monitor using Auto channel detect.

Thanks for any tips.

Rainer


   

It says the video is private and can’t be viewed, but here’s some common issues that cause noise or interference:

Outside rf interference- not much you can do about that other than change bands/channels. If you’re in an area that might be heavily saturated with WiFi, R8 is the band/channel that is farthest away from WiFi. May not be legal use where you live without a ham license.

Noise-
Wiring is a big culprit here. Make sure you twist your wires. Run your vtx and camera ground to the same ground pad.
Make sure you’ve got a low esr capacitor on your main power pads. If I recall correctly you’re running a massive octocopter, power noise may be a bit of a struggle. Putting a cap on your vtx power pads might help, maybe running an LC filter as well.

Quote:It says the video is private and can’t be viewed

Thanks, will check the settings.

Will analyze the set up according to you recommendations and add if possible the recommended capacitors or filters.

Rainer

How are you currently powering the vtx?

Remember that we're talking analog signal here. Analog is an interference catcher, but it takes it gracefully and gradually without killing the pilots ability to orientate the drone. The more you fly the more you get used to such small interruptions.

In this place, surrounded by long strait walls that the signal bounces off, it is possible the problems are caused by multipathing.
You should check in a more open space.

Don't give up and fly as more as you can.

Looks like multi-pathing from all the walls closely around it to me. Take it to free space well away from radio reflective terrain, still like it?

It's hardly worth me commenting based on what others have already mentioned, but I thought I would post a reply to back up / echo what others have said. That is THE worst type of environment to be flying an analog quad in. Lots of concrete walls surrounding the quad and very likely WiFi blasting out from the adjacent residencies on the same 5.8GHz frequency band which is causing interference with the video signal. Don't start pulling anything apart until you have taken it for a test flight out in the open countryside well away from any urban life.

(14-Sep-2023, 07:47 PM)Lemonyleprosy Wrote: How are you currently powering the vtx?

Hi,

It is powered from the main battery.

Rainer

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(15-Sep-2023, 06:07 AM)Sherghan Wrote: Remember that we're talking analog signal here. Analog is an interference catcher, but it takes it gracefully and gradually without killing the pilots ability to orientate the drone. The more you fly the more you get used to such small interruptions.

In this place, surrounded by long strait walls that the signal bounces off, it is possible the problems are caused by multipathing.
You should check in a more open space.

Don't give up and fly as more as you can.

Thanks. Will do as soon as I can.

Rainer

(15-Sep-2023, 08:52 AM)BadRaven Wrote: Looks like multi-pathing from all the walls closely around it to me. Take it to free space well away from radio reflective terrain, still like it?

Thanks for the info.

Rainer

(15-Sep-2023, 09:12 AM)SnowLeopardFPV Wrote: It's hardly worth me commenting based on what others have already mentioned, but I thought I would post a reply to back up / echo what others have said. That is THE worst type of environment to be flying an analog quad in. Lots of concrete walls surrounding the quad and very likely WiFi blasting out from the adjacent residencies on the same 5.8GHz frequency band which is causing interference with the video signal. Don't start pulling anything apart until you have taken it for a test flight out in the open countryside well away from any urban life.

Thanks and well there is a WiFi repeater from my DECO system not more then maybe 5 meters away.

For a start I did not want to buy an expensive FPV system as I just wanted to see how this technology works. Later on when I like it maybe I go to a digital one.

Any reasonable priced ones recommendation?

Thanks

Rainer

(16-Sep-2023, 04:35 PM)NHSA Wrote: Any reasonable priced ones recommendation?

There are only 3 digital FPV systems on the market (DJI, Caddx/Walksnail, and HDZero) all of which are expensive unfortunately so if you decide to go that route you will need some deep pockets.

If you are willing to experiment there are some open source solutions like OpenIPC that claim a $50 parts list and streams to your PC.
https://intofpv.com/t-diy-hd-1080p-long-...50-openipc

Otherwise for mainstream systems, the Walksnail has a relatively low entry point if you have an HDMI display. You can get the VRX+VTX/cam kit for $240 and occassionally it goes on sale for under $200. Probably the best HD image at that price point, and includes 1080p onboard recording too.

Hi,

Thanks for all the info so far. Now another question is ¿does my existing monitor work with a digital VTX?

Thanks Rainer

The monitor you have (as found HERE on AliExpress) has AV-IN capabilities with a resolution of 800x480. It doesn't support HDMI. The best you could do with that monitor would be to get an HDMI-to-analog converter, but with that along with the low resolution of the screen means that you aren't going to benefit from the image quality of digital, and the latency is also going to be higher with the additional digital-to-analog conversion going on between the VRX and the monitor. You would be better off getting a monitor that supports a digital HDMI input signal.

The standalone HDZero and Walksnail VRX's pipe their image out over HDMI, as does the OpenIPC solution (which uses a Raspberry Pi), so any of those 3 could be used with a monitor that has HDMI input capabilities. While the DJI O3 digital FPV systems also allows the image to be piped to an external device with an HDMI input, the only way to receive the image is via an expensive $500 pair of goggles. There are no cheap standalone VRXs for the DJI FPV systems.

Hi and thanks,

So what I need is a VRX which decodes the digital signal and from there it goes into a HDMI capable monitor.

So far I do not like the idea of Googles.

I will have to search if there exist on the market a capable VRX monitor which decodes the digital signal without needing a decoder box.

Interesting stuff...

Rainer