remove splitter.
signal quality
need a new HDM cable
UHF band pass filter
High pass filter.
there is. shielded cable reduces the interference though
The buzzing sound when a cable is plugged in is often caused by electromagnetic interference or a ground loop. This interference can be due to various factors such as poor cable quality, electrical interference, or improper grounding.
Fiber-Optic
Fiber optic cable is not subject to EMI and RFI interference because it transmits data using light signals through glass or plastic fiber strands, rather than electrical signals through copper conductors. This makes fiber optic cable ideal for environments where high levels of interference are present, such as near power lines or in industrial settings.
coaxial cable
To stop interference with your cable and wifi, move both modems away from other technological devices like cellphones that may block their signal.
Fiber Optic Cable
optical fibre
The outer braiding of coaxial cable is a electromagnetic shield to protect against interference.
the twisting of the wires in the cable
The shielding braid in a coaxial cable has this function
cut or be disconnected.. electromagnetic interference