Digital & Communication-Related Noise

Interference from digital transmissions.

Broadband Data Emissions (PLC, DSL, Ethernet)

• Source: Power line communication devices, Ethernet over unshielded cables.

• Characteristics: Continuous broadband hash across HF bands.

• Identification: Peaks around known DSL/PLC frequencies.

• Mitigation: Use shielded cables, distance antennas from sources.

Switching Digital Logic Noise

• Source: Microcontrollers, SDR devices, USB hubs.

• Characteristics: Spikes at processor clock frequencies.

• Identification: Measured using an SDR waterfall.

• Mitigation: Use proper shielding, move RF-sensitive equipment away from computers.