Note 1: Usually, the instantaneous frequency is shifted between two discrete values termed the "mark frequency[?]" and "space frequency[?]". This is a noncoherent form of FSK.
Note 2: Coherent forms of FSK exist in which there is no phase discontinuity in the output signal. Synonyms frequency-shift modulation, frequency-shift signaling.
Source: from Federal Standard 1037C and from MIL-STD-188
... from Royalty
A Royal Family is the extended family of a monarch. It usually includes princes, princesses, dukes, earls, and a variety of other hereditary ...
Book Week Costumes
Kids.Net.Au - kids safe portal for children, parents, schools and