Looks like “one
times 10 to the ninth” which equals 1000 megahertz (1 GHz). 1 Mhz
would be “one times 10 to the sixth.” It is scientific
notation as used in mathematics. When electronic calculators came into
use they came up with a new notation system for scientific notation which was
more compatible with calculator. That’s where the 1E9 comes from
(actually, the “E” stands for Engineering notation which is
expressed in multiples of three – i.e., -12, -9, -6, -3, 0, 3, 6, 9, 12, which
engineers use. They relate to the more usually used units, Kilo, Mega,
Micro, etc.) In the old days it would have been written 1 X 10^9, and actually,
that is a change from the way you would write it by hand. With computer
keyboards – the method is to indicate a superscript 9 (raised to the
power of 9) is by preceding the number with a carrot symbol.
Roger, KL7Q
Can anyone help with explanation of following terminology for
frequency:-
example 1e9
is this 1Mhz?
73 Laurie.
