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Question 195

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

  1. 7.178 MHz to 7.181 MHz
  2. 7.178 MHz to 7.184 MHz
  3. 7.175 MHz to 7.178 MHzCorrect answer
  4. 7.1765 MHz to 7.1795 MHz

Explanation

LSB places transmitted energy below the suppressed carrier frequency, so a 3 kHz wide signal with the display reading 7.178 MHz occupies from 7.178 minus 0.003, which is 7.175 MHz, up to 7.178 MHz. Nothing is transmitted above the displayed frequency.

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Question 195: What frequency range is occupied by a 3 kHz LSB signal when… · FCC General Class (Element 3) · Questena