Basic Qualification · B-008 Interference and suppression · B-008-003-004
What problem may occur if your transmitter is operated without its cover or other shielding in place?
- A It may transmit a weak signal
- B It may draw excessive current
- C It may transmit a chirpy signal
- D It may radiate spurious emissions
Correct answer: D — It may radiate spurious emissions. From the official ISED question bank, verified word for word.
Why
Removing the cover or shielding allows your transmitter to leak unwanted radio frequencies that do not belong in your assigned channel. 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.