From neutral to ground there seems to be just some noise and a bit of DC.

Yes, I tried different outlets, doesn’t make a difference. I checked the wiring inside the plug too, the connection seems solid.

I tested live to ground, live to neutral, both in and out of the UPS, and I couldn’t see anything out of the ordinary.

The input signal isn’t a clean sine wave but it’s not dirty either, I’d say it’s sine with some extra harmonics and a little bit of noise. There were no sudden peaks or meaningful variations even while the UPS was switching furiously.

I don’t have CFL bulbs, only LEDs. I can’t think of anything else that could be causing interference. I’ll try contacting the power company as suggested by @glimse@lemmy.world

Thanks for all the replies.

It’s extremely easy to set up with docker, I’ve been using a self-hosted instance for about 2 years now. Contact me if you need help setting it up or if you just want to test it.

Hardware requirements depend on how many users will be using it, I use an old i3 NUC as a home server and it can easily handle a room with a dozen people, especially if it’s just audio, it gets heavier on the CPU if a lot of them have their webcams on but generally speaking if you have a decent internet connection you’ll be fine.

Follow these instructions: https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-docker/ You will need to set up HTTPS unless you’re already using a reverse proxy.

Italy - 35€/mo, 1Gbps down, 300Mbps up, unlimited. Goes down at least once a month though, openfiber sucks

As far as I know this is no longer a problem if your system supports hardware video encoding for the video codec (vp8/9 or h264 based on server configuration and browser support).

That’s completely false. The connection between users and the server is encrypted with HTTPS and you can even turn on end to end encryption if you want. Jitsi doesn’t even work over unencrypted HTTP.