QuestenaÜben und erkennen, was als Nächstes dran ist
Frage 225

What undesirable effect can occur when using a noise blanker?

  1. Received audio in the speech range might have an echo effect
  2. The audio frequency bandwidth of the received signal might be compressed
  3. Strong signals may be distorted and appear to cause spurious emissionsRichtige Antwort
  4. FM signals can no longer be demodulated

Erklärung

The blanker gates the receiver off whenever its wideband detector sees a large amplitude excursion, and a strong signal within that detection bandwidth can trigger the gating. Chopping the desired signal this way creates sidebands that appear across the passband as spurious signals.

Mit diesem Test weitermachen

Übung starten
Frage 225: What undesirable effect can occur when using a noise… · FCC Amateur Extra Class (Element 4) · Questena