How are the transceiver audio input and output connected in a station configured to operate using FT8?
The correct answer is B: To the audio input and output of a computer running WSJT-X software. When operating using FT8 (a digital mode), the transceiver's audio input and output are connected to a computer running WSJT-X software (or similar FT8 software). The computer generates the audio tones for transmission and decodes received audio tones.
FT8 is a computer-controlled digital mode that requires software like WSJT-X. The transceiver's audio output (speaker/headphone jack) connects to the computer's audio input (microphone/line-in), and the transceiver's audio input (microphone jack) connects to the computer's audio output (speaker/line-out). The computer software handles the FT8 encoding and decoding, while the transceiver just transmits and receives the audio tones. PTT (push-to-talk) is also typically controlled by the computer.
Exam Tip
FT8 = Computer with WSJT-X. Remember: FT8 operation connects the transceiver's audio to a computer running WSJT-X software. The computer handles encoding/decoding.
Memory Aid
"**F**T8 = **F**rom **T**ransceiver **T**o **C**omputer (think 'FT8 = FTTC' = From Transceiver To Computer, WSJT-X)"
Real-World Application
You want to operate FT8 on 20 meters. You connect your transceiver's speaker output to your computer's microphone input, and the transceiver's microphone input to the computer's speaker output. You run WSJT-X software on your computer, which generates the FT8 audio tones for transmission and decodes received FT8 signals. The computer also controls PTT. This setup allows you to make FT8 contacts.
FCC Part 97.3Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. FT8 doesn't use a terminal node controller (TNC). It uses direct audio connection to a computer running FT8 software.
Option C: Incorrect. FT8 doesn't use a separate conversion unit. The computer software (WSJT-X) handles the conversion directly.
Option D: Incorrect. FT8 doesn't use a website converter. It uses software installed on your computer (like WSJT-X).
题目解析
The correct answer is B: To the audio input and output of a computer running WSJT-X software. When operating using FT8 (a digital mode), the transceiver's audio input and output are connected to a computer running WSJT-X software (or similar FT8 software). The computer generates the audio tones for transmission and decodes received audio tones. FT8 is a computer-controlled digital mode that requires software like WSJT-X. The transceiver's audio output (speaker/headphone jack) connects to the computer's audio input (microphone/line-in), and the transceiver's audio input (microphone jack) connects to the computer's audio output (speaker/line-out). The computer software handles the FT8 encoding and decoding, while the transceiver just transmits and receives the audio tones. PTT (push-to-talk) is also typically controlled by the computer.
考试技巧
FT8 = Computer with WSJT-X. Remember: FT8 operation connects the transceiver's audio to a computer running WSJT-X software. The computer handles encoding/decoding.
记忆口诀
**F**T8 = **F**rom **T**ransceiver **T**o **C**omputer (think 'FT8 = FTTC' = From Transceiver To Computer, WSJT-X)
实际应用示例
You want to operate FT8 on 20 meters. You connect your transceiver's speaker output to your computer's microphone input, and the transceiver's microphone input to the computer's speaker output. You run WSJT-X software on your computer, which generates the FT8 audio tones for transmission and decodes received FT8 signals. The computer also controls PTT. This setup allows you to make FT8 contacts.
错误选项分析
Option A: Incorrect. FT8 doesn't use a terminal node controller (TNC). It uses direct audio connection to a computer running FT8 software. Option C: Incorrect. FT8 doesn't use a separate conversion unit. The computer software (WSJT-X) handles the conversion directly. Option D: Incorrect. FT8 doesn't use a website converter. It uses software installed on your computer (like WSJT-X).
知识点
FT8, WSJT-X, Computer interface, Digital modes
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.