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Question 142

Which of the following should be considered when selecting an accessory SWR meter?

  1. The frequency and power level at which the measurements will be madeCorrect answer
  2. The distance that the meter will be located from the antenna
  3. The maximum SWR anticipated on the transmission line
  4. The ability of the meter to compensate for a poor transmission line match to the antenna

Explanation

An SWR meter contains a directional coupler and detector designed for a particular frequency range and power range, so a meter used outside those ratings gives wrong readings or can be damaged. Distance from the antenna and the maximum SWR are not selection criteria, and no meter compensates for a mismatch.

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Question 142: Which of the following should be considered when selecting… · FCC Technician Class (Element 2) · Questena