In this video I use a spectrum analyser to measure the emissions from my modern replacement ROM for retro systems, One ROM, which uses an RP2350 microcontroller.

I perform both far and near field testing, comparing the total emissions from the MCU-based replacement ROM to the original.

🔗 Links

One ROM website: https://onerom.org/
Layout of this PCB: https://youtu.be/N-wJNt-2UUM

🛒 Buy One ROMs

28 pin protoypes - very limited quantity: https://www.packom.net/product/one-rom-fire-28/

Keep an eye on my online store if you want to buy One ROMs when they are available:

https://www.packom.net/product/one-rom/

If you sell a version of One ROM, let me know so I can publicise it on youtube and at https://onerom.org/

⏰ Timestamps

00:00 🎬 Introduction
02:25 📊 Testing the spectrum analyser
02:51 🔬 Testing philosophy
05:07 📡 Far field testing
06:52 🔍 Near field testing
11:11 💰 4 layer PCB pricing
12:28 💭 Final thoughts

Video content copyright (c) 2025 piers.rocks Limited. All rights reserved.

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