Basic Qualification · B-008 Interference and suppression · B-008-004-006
What causes splatter interference?
- A The transmitting antenna is non-resonant
- B Overmodulating a transmitter
- C Keying a transmitter too fast
- D Unwanted feedback in an amplifier stage
Correct answer: B — Overmodulating a transmitter. From the official ISED question bank, verified word for word.
Why
Splatter interference happens when a transmitter is pushed beyond its limits by overmodulating it, which forces the signal to spread into frequencies it should not occupy. The full explanation — and one for every question — is in Pro.
Practise this section
When things interfere: harmonics, overload, RFI to and from your station, filters, ferrites and how to fix the neighbour's TV.