OneOfEleven

I've already suggested it to Jan but thought I'd log it here. It might be a good idea to add RF gasket strips between the metal shields and the PCB...

> In fact, at the moment I can not get the full 10k points out via USB, only up to about 5,5k points/sec. Not exactly sure what the issue is...

I might try some conductive sealant just as a simple test, something similar to this .. https://shielding-solutions.com/product/electrically-conductive-caulk-and-sealant

> > [...] they are simply missing from the data stream that I get from libusb > > That happens when the databuffer in the VNA is full. There is...

Here's a quick video showing the gap we can't close and how it affects the performance around port-1 at least (S11 changes a lot) .. https://www.youtube.com/watch?v=ECTPgdGvlfo This is why we...

> just wonder watching your video if the RaspberryPi 4 can handle this throughput or is it reserved for big machine? Did you or anyone tested for this option? >...

If the I.F signal into the ADC's is fairly clean you can use under sampling for the ADC sampling, I use it all the time without any performance problems, and...

It does sometimes get very hot to touch , particularly if I'm running it quite fast. Here's a speeded up video (original length is 3 minutes) showing the S11 drift...

> I couldn't quite see on your video, if upper curve is S11, and how big is the drift? > Funny thing, it gets a less noisy towards the end....