Noise flowing up the screen..

[Michael Dawes]

I get a horizontal band of noise that flows up the screen from the bottom. (I’m using the OSSC on my amiga, and other than this it’s a totally solid display) It’s hard to explain, it’s like a heat haze almost, just a jiggly band.

I can’t figure out what setting, if any could help lessen it. I’m running line 3x .. it basically looks like what the entire display does if I turn down (to higher values, so maybe turning “up!”) the low pass filter.. is there any way i can turn it up higher than 9mhz?

[Fnnrqwin]

I get this exact same thing. Pretty sure it’s a power issue.

[BuckoA51]

If it’s an A1200 or CD32 I’d definitely get the system recapped. On my CD32 I had to get the machine recapped, swap the PSU and install a RGB mod (don’t use the RGB from something like a SX32 or terriblefire) to get rid of all the noise.

[Fnnrqwin]

I actually have this same thing happening on all my systems, although it’s much more noticeable on 240p systems. I’ve used two OSSCs, an official pre-HDMI one and a knockoff HDMI one. Both have the same issue. Used the power supplies that came with each and swapped them too. I’ve bypassed my SCART switch and I got the same issue, so that’s not the part of the chain. Running everything through power conditioners.

Systems tested:
– NES
– SNES
– N64
– Gamecube
– Wii
– PS1
– PS2
– Genesis
– Dreamcast

I don’t want to start blaming the design of the OSSC because I haven’t heard of this being a widespread issue, it’s just weird I’d have it with two different models. Any ideas?

[BuckoA51]

What PSUs do you use with your consoles?

[Michael Dawes]

Ah interesting, thanks both 🙂 My Amiga is using a new PSU and a new RGB Scart cable (plugged into the amiga’s standard 23 pin connector) – But the Amiga’s the only thing I’ve really tried on the OSSC and I guess I could try the Wii on it and see if I get the noise with that too. In the long term I plan on getting the A1200 recapped anyway, so maybe that’ll help as well.

[Fnnrqwin]

All stock power supplies. NTSC only.

[Michael Dawes]

All PAL here, but the noise is also apparent if I switch to NTSC screen modes. I can’t see the noise with the Wii plugged in using Component cables so it seems like an Amiga issue here.

I tried a different SCART cable on the amiga and the noise was much, much worse.. Which makes me think if there was a premium, shielded SCART cable for the amiga i might be able to mitigate or remove the noise entirely. Anyone know where I can buy one of those though? I’m only finding pretty flimsy looking ones like my two. :/

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