T8D - Signals and emissions
Technician Class
Non-voice and digital communications: image signals and definition of NTSC, CW, packet radio, PSK, APRS, error detection and correction, amateur radio networking, Digital Mobile Radio, WSJT modes, Broadband-Hamnet
12 questions | Updated: Feb 19, 2026
Which of the following is a digital communications mode?
What is FT8?
What kind of data can be transmitted by APRS?
What is meant by the term "NTSC?"
Which of the following is an application of APRS?
What does the abbreviation "PSK" mean?
Which of the following describes DMR?
Which of the following is included in packet radio transmissions?
What is CW?
Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?
What is the role of ARQ in a transmission system?
Which of the following best describes an amateur radio mesh network?