Ham Radio Extra Class Practice Test 2025 – All-in-One Comprehensive Guide to Exam Success!

The bandwidth of a slow-scan TV (SSTV) signal is typically around 3 kHz. Slow-scan TV is a form of amateur radio that transmits images one frame at a time, and this mode is primarily designed for low-speed transmission, often used in situations where bandwidth is limited.

The 3 kHz figure reflects the audio frequency range used to encode the image data, allowing the signal to maintain sufficient quality for the transmitted images, albeit at a slower rate compared to standard analog TV broadcasts. This bandwidth is significantly lower than that of traditional television signals, which can span several megahertz, emphasizing the essence of slow-scan TV as a method suited for amateur use where slower transmission speeds and lower bandwidth consumption are acceptable.

The other choices present bandwidths that are more characteristic of different types of signals; for example, 600 Hz would be too narrow for image transmission, whereas 2 MHz and 6 MHz are more representative of bandwidths found in regular television broadcasts or other high-frequency services. Thus, the 3 kHz specification best captures the nature of slow-scan TV signals in amateur radio contexts.