Deep Dive: E1D04
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.
Why Other Answers 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.
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 Example
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.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E1D
Reference: FCC Part 97.119
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E1D topic.