SignalPrep
Basic Qualification · B-006 Feedlines and antenna systems · B-006-005-005

Quel est le principal effet indésirable de l'exploitation avec un ROS élevé?

  1. AUne augmentation du courant en mode commun
  2. BUne augmentation de la perte de la ligne de transmission
  3. CUne augmentation du niveau de bruit reçu
  4. DUne augmentation du rayonnement de la ligne de transmission

Correct answer: B — Une augmentation de la perte de la ligne de transmission. Question tirée de la banque officielle d'ISDE.

Why

When the standing wave ratio, or SWR, is high, much of the radio energy bounces back and forth along the feedline instead of reaching the antenna. 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

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