EMI / RF / Shielding Experiments with aluminum screen wire mesh and galvanized steel box
Problem : video switch (ATEM Television Studio failed probably due to rf/emi). hypothesized solution : shield all cables and whole device. findings on cables: all hdmi cables are shielded. i opened all cables from camera manufacturers (panasonic) and also all cables from CDR-King, they all have shields. some of them also have shields in individual cables, aside from the main foil shielding all cables. some of them, the long cables, have aluminum shield inside and mesh shield outside. all power cables are not shielded. including 12v cables, 220v cables, 5v cables. UTP is of course Unshielded. STP is shielded. need to check USB cables if shielded. (it is shielded) experiment 1 - metal sheet box shield VS wifi: half day of metalwork - not so nice first third is outside metal shield center part is inside shield last third is outside shield experiment 2 - aluminum screen 1 layer VS wifi: aluminum screen rolled (1 layer only) over cellpho...