Đã lưu trong:
| Tác giả chính: | |
|---|---|
| Định dạng: | Recurso digital |
| Ngôn ngữ: | Tiếng Anh |
| Được phát hành: |
Zenodo
2025
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| Những chủ đề: | |
| Truy cập trực tuyến: | https://doi.org/10.5281/zenodo.18084452 |
| Các nhãn: |
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Mục lục:
- <p>This paper presents a rigorous technical analysis of electromagnetic interference (EMI) transmission through residential electrical wiring systems, based on empirical observations made by the author at age 12 in Brazil circa 1994, during the Intel 386/486 computing era and preceding widespread commercial Internet deployment.<br>The phenomenon under investigation involves the unintentional coupling of computer video signals to analog television receivers through shared household electrical infrastructure, without direct cabling between devices. We provide a comprehensive examination of the physical mechanisms underlying conducted EMI propagation, including switching-mode power supply (SMPS) harmonics at frequencies ranging from 20 kHz to several MHz, cathode ray tube (CRT) horizontal sweep emissions (15.6–31.5 kHz fundamental frequencies with extensive harmonic content), and power line coupling effects in residential wiring systems typical of Brazilian homes.<br>Through detailed theoretical analysis supported by historical technical specifications, contemporary EMC research, and electromagnetic field theory, we characterize the frequency-domain interactions between 386/486-era personal computers (operating with minimal EMI suppression) and analog PAL-M television systems prevalent in Brazilian households during the pre-EMC-regulation era.<br>This work contributes to the historical documentation of EMI phenomena in domestic computing environments and provides quantitative insights into the electromagnetic compatibility challenges of early personal computing hardware deployed in residential settings.</p>