Questenaتمرینی که نشان می‌دهد بعد چه چیزی را مرور کنید
سؤال 107

Which of the following digital modes is designed for EME communications?

  1. MSK144
  2. PACTOR III
  3. WSPR
  4. Q65پاسخ درست

توضیح

Q65 was written for paths with heavy Doppler spread and very weak signals, exactly the conditions of moonbounce, and its long sequences and message averaging are aimed at that use. MSK144 is for meteor scatter, WSPR is a propagation beacon mode, and PACTOR III is an HF data transfer mode.

ادامهٔ این آزمون

شروع تمرین
سؤال 107: Which of the following digital modes is designed for EME… · FCC Amateur Extra Class (Element 4) · Questena