Noise when connected to OSSC over Crosspoint

[Jademalo]

I feel like I’ve come across this before in years past, but I can’t seem to remember nor find an answer so I thought I’d ask here.

I’ve got a friend with an OG Xbox going into a Crosspoint Ultra 1616, which goes into an OSSC. The cable run is very simple, Component from the Xbox into the crosspoint, then component out to the OSSC. There are two outputs going to two separate OSSCs.
For some reason, when running through the crosspoint one of the OSSCs has a huge amount of noise. It’s sort of a horizontal crawling noise, going left to right and slowly progressing up the screen. Running directly into the OSSC doesn’t give this issue, it’s only when going through the crosspoint.

I know they’re finnicky with sync, but I’ve never encountered issues like this when using YPbPr. The noise looks familiar though, I just can’t remember exactly what it was. I think it was a good 6+ years ago I last saw something like this.
Fascinatingly, his other OSSC doesn’t have this issue at all when running through the crosspoint, which is what makes me think it’s a config issue. One is set up for good capture, the other is set up for connecting to a monitor to play.

Here’s a short clip, you can see it easiest on the red building

Here’s a screengrab showing the noise;

Any ideas?
Thanks!

[Jademalo]

After a bit more testing, it seems that either of the OSSCs plugged into output 1 work fine, but plugged into output 4 results in the noise. We’ve worked around it by moving from output 4 to output 5, but… that doesn’t exactly answer the question as to why there’s so much noise on output 4.

It’s a 1616 so it’s hardly the end of the world since we’ve got plenty of outputs, but ideally I’d like to figure out what’s causing it.

[BuckoA51]

That is indeed quite strange. Do you have any dip switches on your Extron? Though even so I would have thought they affected sync only, which you’re not using (just the first 3 connectors for component video).

[Jademalo]

There are, there are two. One next to the H bank and one next to the V bank. They’re all set to 510ohm.

As you say though, we’re only using the first 3 connectors. Plus the input seems to not be the problem here, since outputs 4 and 5 are both clean.

It’s very strange.

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