Assertion: shortwave radio | /r/CapableOf | use frequency
Facets:
value: in the hf band
type: LOCATION
value: from about 1.7 megahertz
type: OTHER
Source sentences:
text: Shortwave radio uses frequencies in the HF band, from about 1.7 megahertz to 30 megahertz, according to the National Association of Shortwave Broadcasters (NASB).