MEG and MHz have different meanings. MEG only stands for a number, and MHz is short for Megahertz, which is/kloc-0 1000000 Hz, but it depends on where you are talking about. If there is no ambiguity, it is also common to omit units. In "FREQ=5MEG", FREQ should be the abbreviation of frequency, so it should be followed by 5mhz.