What is the impact of using excessive effective radiated power on a satellite uplink?
The correct answer is B: Blocking access by other users. Using excessive effective radiated power (ERP) on a satellite uplink causes blocking access by other users. When you use too much power, your signal can overload the satellite's receiver or create interference that prevents other operators from using the satellite. Satellites are shared resources, and excessive power is antisocial and violates good amateur practice. For amateur radio operators, using only the minimum power needed (typically 5-10 watts for most satellites) ensures fair access for all users and prevents satellite overload.
Exam Tip
Excessive uplink power = blocks other users. Think 'E'xcessive 'P'ower = 'E'xcludes 'P'eople. Too much power overloads satellite receiver or creates interference, preventing others from using the satellite. Use minimum power needed.
Memory Aid
"Excessive uplink power = blocks other users. Think 'E'xcessive 'P'ower = 'E'xcludes 'P'eople. Overloads satellite receiver, creates interference, prevents fair access. Use minimum power needed."
Real-World Application
You use 100 watts on a satellite uplink when 5 watts would work. Your strong signal overloads the satellite's receiver, creating distortion and interference that prevents other operators from using the satellite. Using only the power needed (5-10 watts) ensures fair access for everyone and proper satellite operation.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Excessive power doesn't command satellites to improper modes - satellites have their own control systems. Power levels don't affect satellite commands.
Option C: Incorrect. Excessive power doesn't overload satellite batteries - the satellite's power system is separate from the uplink. Batteries are charged by solar panels.
Option D: Incorrect. Excessive power doesn't reboot satellite computers - satellite control is independent of uplink power levels.
题目解析
The correct answer is B: Blocking access by other users. Using excessive effective radiated power (ERP) on a satellite uplink causes blocking access by other users. When you use too much power, your signal can overload the satellite's receiver or create interference that prevents other operators from using the satellite. Satellites are shared resources, and excessive power is antisocial and violates good amateur practice. For amateur radio operators, using only the minimum power needed (typically 5-10 watts for most satellites) ensures fair access for all users and prevents satellite overload.
考试技巧
Excessive uplink power = blocks other users. Think 'E'xcessive 'P'ower = 'E'xcludes 'P'eople. Too much power overloads satellite receiver or creates interference, preventing others from using the satellite. Use minimum power needed.
记忆口诀
Excessive uplink power = blocks other users. Think 'E'xcessive 'P'ower = 'E'xcludes 'P'eople. Overloads satellite receiver, creates interference, prevents fair access. Use minimum power needed.
实际应用示例
You use 100 watts on a satellite uplink when 5 watts would work. Your strong signal overloads the satellite's receiver, creating distortion and interference that prevents other operators from using the satellite. Using only the power needed (5-10 watts) ensures fair access for everyone and proper satellite operation.
错误选项分析
Option A: Incorrect. Excessive power doesn't command satellites to improper modes - satellites have their own control systems. Power levels don't affect satellite commands. Option C: Incorrect. Excessive power doesn't overload satellite batteries - the satellite's power system is separate from the uplink. Batteries are charged by solar panels. Option D: Incorrect. Excessive power doesn't reboot satellite computers - satellite control is independent of uplink power levels.
知识点
Satellite uplink power, Effective radiated power, Satellite access, Good operating practice
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.