the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > processes > [adjective] > of signal: converted to higher frequency
up-converted1972
1972 Physics Bull. Jan. 18/2 Since the upconverted radiation now has a wavelength close to both the helium–neon and krypton (0·605 μm) wavelengths, an accurate interferometric comparison is much easier to perform than with the 9·3 μm line directly.