Which of the following is required in the identification transmissions from a balloon-borne telemetry station?
The correct answer is A: Call sign. What is required in the identification transmissions from a balloon-borne telemetry station is the call sign. Balloon telemetry stations must identify with their call sign. For amateur radio operators, this is important for balloon operations. Understanding this helps ensure legal balloon operation.
Exam Tip
Balloon telemetry identification = call sign required. Think 'B'alloon 'T'elemetry = 'B'asic 'T'hing (call sign). Balloon telemetry stations must identify with their call sign. Not power, not grid locator - just call sign.
Memory Aid
"Balloon telemetry identification = call sign required. Think 'B'alloon 'T'elemetry = 'C'all sign. Balloon telemetry stations must identify with their call sign. Important for balloon operations."
Real-World Application
A balloon-borne telemetry station: In its identification transmissions, it must include the call sign. The call sign identifies the station operating the balloon. Output power and grid locator are not required in identification - only the call sign is required. This is the requirement - call sign in identification transmissions.
FCC Part 97.119Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Output power of balloon transmitter isn't required in identification - only call sign is required. Power isn't required.
Option C: Incorrect. Six-character Maidenhead grid locator isn't required in identification - only call sign is required. Grid locator isn't required.
Option D: Incorrect. Since B and C are not required, 'all of the above' cannot be correct. Only call sign is required.
题目解析
The correct answer is A: Call sign. What is required in the identification transmissions from a balloon-borne telemetry station is the call sign. Balloon telemetry stations must identify with their call sign. For amateur radio operators, this is important for balloon operations. Understanding this helps ensure legal balloon operation.
考试技巧
Balloon telemetry identification = call sign required. Think 'B'alloon 'T'elemetry = 'B'asic 'T'hing (call sign). Balloon telemetry stations must identify with their call sign. Not power, not grid locator - just call sign.
记忆口诀
Balloon telemetry identification = call sign required. Think 'B'alloon 'T'elemetry = 'C'all sign. Balloon telemetry stations must identify with their call sign. Important for balloon operations.
实际应用示例
A balloon-borne telemetry station: In its identification transmissions, it must include the call sign. The call sign identifies the station operating the balloon. Output power and grid locator are not required in identification - only the call sign is required. This is the requirement - call sign in identification transmissions.
错误选项分析
Option B: Incorrect. Output power of balloon transmitter isn't required in identification - only call sign is required. Power isn't required. Option C: Incorrect. Six-character Maidenhead grid locator isn't required in identification - only call sign is required. Grid locator isn't required. Option D: Incorrect. Since B and C are not required, 'all of the above' cannot be correct. Only call sign is required.
知识点
Balloon-borne telemetry station, Identification transmissions, Call sign, Balloon operation
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.