An amplitude modulated signal consists of a CW (continuous wave) at the carrier frequency, plus two

components for each frequency in the modulating information. The two components are separated

from the carrier by a frequency equal to the modulating frequency, with one above and one below the

carrier frequency. Thus, the modulating information appears twice in the spectrum of the modulated signal.

Freq. or FREQ.

the difference between the source freq. and the reference freq

Freq - album - was created in 1984-08.

here is the formula

modulation index=peak freq deviation/operating freq.

frm this we can calculate freq dev