Question
What do the terms “L band” and “S band” specify?
Answer Options
- A) The 23- and 13-centimeter bands
- B) The 2-meter and 70-centimeter bands
- C) FM and digital store-and-forward systems
- D) Which sideband to use
Correct Answer: A
Explanation
In amateur radio, particularly with satellite communications, frequency bands are often referred to by their standard international microwave designations (L, S, C, X, K bands, etc.) in addition to the standard amateur wavelength designations (23cm, 13cm, etc.). These designations correspond to specific frequency ranges in the microwave spectrum.
The terms L band and S band specify the frequency ranges corresponding to the 23-centimeter band (L band, roughly 1.2-1.7 GHz, including the 1.2 GHz amateur band) and the 13-centimeter band (S band, roughly 2-4 GHz, including the 2.4 GHz amateur band). These bands are frequently used for higher-speed digital downlinks or as part of a satellite’s transponder mode.
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