Megahertz is defined as MHz, kilohertz as kHz and hertz as Hz. It is,
in fact, ALWAYS a capital "H" to pay homage to Mr. Heinrich Hertz.
Consider: http://www.ideafinder.com/history/inventors/hertz.htm or,
http://searchnetworking.techtarget.c...214263,00.html
or, http://tf.nist.gov/timefreq/general/glossary.htm (click on "M" or
"J-K" - these folks should know the difference)

I have a different understanding. Hz is written with a capital H not to pay
homage to Mr. Heinrich Hertz, but more simply because all measurement units
begin with a capital letter.

Homage was instead paid to Mr Kelvin when they decided that the capital K is
assigned to the temperature measurement unit (kelvin degree) instead than to the
1000 multiplier. This explains why kilohertz is written with a small k, an
exception to the general rule that all multipliers have a capital lettere (kHz,
MHz, GHz, THz).

73

Tony I0JX.