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Subelement B
MF-HF-DSC-SITOR (NBDP) Equip. & Ops:
Section 11
Frequencies and Bandwidth:
What is the assigned bandwidth and channel spacing for J3E voice transmissions?
  • 170 Hz and 300 Hz
  • 300 Hz and 500 Hz
  • Correct Answer
    2.8 kHz and 3.0 kHz
  • 3.1 kHz and 4.0 kHz
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What is the assigned bandwidth and channel spacing for J2B SITOR (NBDP) transmissions?
  • 3.1 kHz and 4.0 kHz
  • 2.8 kHz and 3.0 kHz
  • 170 Hz and 300 Hz
  • Correct Answer
    300 Hz and 500 Hz
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What is the allowable frequency tolerance for GMDSS MF-HF transmitters?
  • Correct Answer
    10 Hz
  • 15 Hz
  • 20 Hz
  • 30 Hz
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Using a frequency counter with an accuracy of 2 ppm which of the following are within legal tolerance for the frequencies of 2182.0 kHz and 4125.0 kHz? The counter has a display resolution of 1 Hz.
  • 2181.991 kHz and 4125.004 kHz
  • Correct Answer
    2182.006 kHz and 4124.995 kHz
  • 2182.010 kHz and 4124.992 kHz
  • 2181.990 kHz and 4125.009 kHz
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Which of the following are assigned frequencies for Digital Selective Calling?
  • 2182 kHz, 4177.5 kHz, 6312 kHz, 8376.5 kHz, 12577 kHz, 16420 kHz.
  • Correct Answer
    2187.5 kHz, 4207.5 kHz, 6312 kHz, 8414.5 kHz, 12577 kHz, 16804.5 kHz.
  • 2187.5 kHz, 4207.5 kHz, 6268 kHz, 8414.5 kHz, 12520 kHz, 16420. kHz.
  • 2174.5 kHz, 4125 kHz, 6312 kHz, 8291 kHz, 12577 kHz, 16804.5 kHz
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What are the assigned frequencies for VOICE and SITOR (NBDP) follow on communications?
  • VOICE: 2182 kHz, 4125 kHz, 6312 kHz, SITOR (NBDP) 4177.5 kHz, 8376.5 kHz, 12520 kHz
  • VOICE: 8291 kHz, 12577 kHz, 16420 kHz, SITOR (NBDP) 4125 kHz, 6268 kHz, 8376.5 kHz
  • Correct Answer
    VOICE: 4125 kHz, 8291 kHz, 16420 kHz, SITOR (NBDP) 2174.5 kHz, 6268 kHz, 12520 kHz
  • VOICE: 6215 kHz, 8414.5 kHz, 12290 kHz, SITOR (NBDP) 6268 kHz, 8291 kHz, 12520 kHz
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