Amateur Extra › E2 Operating Procedures › E2E01
E2E01
Which of the following types of modulation is used for data emissions below 30 MHz?
Pick an answer to check it.
Answer: B. FSK
Below 30 MHz, data emissions commonly use FSK, such as RTTY. Spread spectrum is not permitted below 30 MHz (it is limited to above 222 MHz for amateurs), and pulse is not allowed there either.
Tip: HF data: FSK.