What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?
The correct answer is B: Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors. A procedure Volunteer Monitors may use to localize a station whose continuous carrier is holding a repeater on is to compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors. By comparing directions from multiple locations, they can triangulate the source. For amateur radio operators, this helps identify problem stations. Understanding this helps explain monitoring techniques.
Exam Tip
Localize interfering station = compare beam headings from multiple Volunteer Monitors. Think 'T'riangulation = 'T'ake headings from 'T'hree locations. Compare beam headings on repeater input from different locations to triangulate the source. Not about polarization or signal strength comparison.
Memory Aid
"Localize interfering station = compare beam headings from multiple monitors. Think 'T'riangulation = 'T'ake headings. Compare beam headings on repeater input from different Volunteer Monitor locations to triangulate the source. Standard direction-finding technique."
Real-World Application
A continuous carrier is holding a repeater on. Three Volunteer Monitors take beam headings on the repeater input from their different locations. By comparing these headings, they can triangulate where the lines intersect - that's the source location. This direction-finding technique helps identify problem stations.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Comparing vertical and horizontal signal strengths on the input frequency doesn't provide direction - polarization doesn't indicate location. Beam headings are needed for direction finding.
Option C: Incorrect. Comparing signal strengths between input and output doesn't provide location - that just shows signal levels, not direction. Beam headings are needed.
Option D: Incorrect. Since A and C don't provide location, 'all of the above' cannot be correct. Only comparing beam headings from multiple locations works.
题目解析
The correct answer is B: Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors. A procedure Volunteer Monitors may use to localize a station whose continuous carrier is holding a repeater on is to compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors. By comparing directions from multiple locations, they can triangulate the source. For amateur radio operators, this helps identify problem stations. Understanding this helps explain monitoring techniques.
考试技巧
Localize interfering station = compare beam headings from multiple Volunteer Monitors. Think 'T'riangulation = 'T'ake headings from 'T'hree locations. Compare beam headings on repeater input from different locations to triangulate the source. Not about polarization or signal strength comparison.
记忆口诀
Localize interfering station = compare beam headings from multiple monitors. Think 'T'riangulation = 'T'ake headings. Compare beam headings on repeater input from different Volunteer Monitor locations to triangulate the source. Standard direction-finding technique.
实际应用示例
A continuous carrier is holding a repeater on. Three Volunteer Monitors take beam headings on the repeater input from their different locations. By comparing these headings, they can triangulate where the lines intersect - that's the source location. This direction-finding technique helps identify problem stations.
错误选项分析
Option A: Incorrect. Comparing vertical and horizontal signal strengths on the input frequency doesn't provide direction - polarization doesn't indicate location. Beam headings are needed for direction finding. Option C: Incorrect. Comparing signal strengths between input and output doesn't provide location - that just shows signal levels, not direction. Beam headings are needed. Option D: Incorrect. Since A and C don't provide location, 'all of the above' cannot be correct. Only comparing beam headings from multiple locations works.
知识点
Volunteer Monitors, Direction finding, Triangulation, Repeater interference
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.