How do ALE stations establish contact?
The correct answer is A: ALE constantly scans a list of frequencies, activating the radio when the designated call sign is received. How do ALE stations establish contact is that ALE constantly scans a list of frequencies, activating the radio when the designated call sign is received. ALE (Automatic Link Establishment) scans frequencies and activates when called. For amateur radio operators, this is important for ALE operation. Understanding this helps when using ALE.
Exam Tip
ALE contact establishment = constantly scans frequencies, activates when designated call sign received. Think 'A'LE = 'A'utomatically 'L'inks by 'E'xchanging calls. ALE scans frequencies and activates when called. Not internet monitoring, not constant tones, not backscatter - just scanning and activating when called.
Memory Aid
"ALE contact establishment = constantly scans frequencies, activates when designated call sign received. Think 'A'LE = 'S'can and 'A'ctivate. ALE scans frequencies and activates when called. Important for ALE operation."
Real-World Application
ALE (Automatic Link Establishment) stations: They constantly scan a list of frequencies, and when the designated call sign is received, the radio activates and establishes contact. This allows automatic link establishment without manual frequency selection. This is how ALE works - scanning frequencies and activating when called.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. ALE radios don't monitor an internet site - they scan frequencies and activate when called. Internet monitoring isn't how ALE works.
Option C: Incorrect. ALE radios don't send constant tone codes - they scan frequencies and activate when called. Constant tone codes isn't how ALE works.
Option D: Incorrect. ALE radios don't activate on backscatter echo - they scan frequencies and activate when called. Backscatter echo isn't how ALE works.
题目解析
The correct answer is A: ALE constantly scans a list of frequencies, activating the radio when the designated call sign is received. How do ALE stations establish contact is that ALE constantly scans a list of frequencies, activating the radio when the designated call sign is received. ALE (Automatic Link Establishment) scans frequencies and activates when called. For amateur radio operators, this is important for ALE operation. Understanding this helps when using ALE.
考试技巧
ALE contact establishment = constantly scans frequencies, activates when designated call sign received. Think 'A'LE = 'A'utomatically 'L'inks by 'E'xchanging calls. ALE scans frequencies and activates when called. Not internet monitoring, not constant tones, not backscatter - just scanning and activating when called.
记忆口诀
ALE contact establishment = constantly scans frequencies, activates when designated call sign received. Think 'A'LE = 'S'can and 'A'ctivate. ALE scans frequencies and activates when called. Important for ALE operation.
实际应用示例
ALE (Automatic Link Establishment) stations: They constantly scan a list of frequencies, and when the designated call sign is received, the radio activates and establishes contact. This allows automatic link establishment without manual frequency selection. This is how ALE works - scanning frequencies and activating when called.
错误选项分析
Option B: Incorrect. ALE radios don't monitor an internet site - they scan frequencies and activate when called. Internet monitoring isn't how ALE works. Option C: Incorrect. ALE radios don't send constant tone codes - they scan frequencies and activate when called. Constant tone codes isn't how ALE works. Option D: Incorrect. ALE radios don't activate on backscatter echo - they scan frequencies and activate when called. Backscatter echo isn't how ALE works.
知识点
ALE stations, Establish contact, Scans frequencies, Activates when called
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.