Basic Qualification · B-006 Feedlines and antenna systems · B-006-002-008
Quel dispositif devriez-vous placer entre du câble coaxial et de la ligne bifilaire ajourée ("window line")?
- AUn parasurtenseur
- BUn harnais de mise en phase
- CUn segment de ligne d'adaptation ("stub")
- DUn symétriseur
Correct answer: D — Un symétriseur. Question tirée de la banque officielle d'ISDE.
Why
A balun is the right device because it bridges the gap between coaxial cable, which carries unbalanced signals, and window line, which carries balanced signals. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and antenna systems is section B-006 of the Basic exam: Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.
Drill B-006 — free, no account