In EME you make QSO with a distant station,
beaming your antennas to the Moon. The signal travels the space up
to the Moon, then bounces back on its surface and returns to the Earth.
The signal loss on the whole path is extremely high.
EME operators are very appreciated in the ham community, because
they need to solve many difficult problems in order to succeed. They must
use very high gain antenna sistems, like arrays
and dishes, horizontal and vertical rotors,
high power transmitters, high gain/low noise preamplifiers, and so on.
EME is done on all VHF bands, and up, from
50 MHz to 10,5 GHz. To maximize the success probability, usually
the QSO are made in
CW.
