In many cases the process of acquiring samples is not correlated to the modulating signal
Be modulated with an internal modulating signal
and "transport stream" mel is
The modulating signal
is represented by time sequences of symbols and pulses, where each symbol has M finite states.
There are two methods for the generation of an SSB optical modulated signal, when the modulating signal
is externally generated : using optical filters and using phase shift techniques.
The envelope of the modulated optical signal is an analog of the modulating signal
in the sense that the instantaneous power of the envelope is an analog of the characteristic of interest in the modulating signal
Using a square wave source for the modulating signal
and setting the generator for 100% modulation, the AM produces the desired effects.
The triangular carrier signal is also shown along with modulating signal
The principle of measurement is by modulating the VCO with a sine wave, then using a demodulator to demodulate the original modulating signal
This modulating signal
can either have a fixed frequency portion, or it can be a two-directional frequency ramp.
Frequency modulation is a special case of angle modulation where the instantaneous frequency of a carrier is varied by an amount proportional to the modulating signal
ofmp-p], which can appreciably simplify analysis of the effect of SMPC and modulating signal
parameters on [V.
In an ideal VCO of infinite modulation bandwidth, if the amplitude of the modulating signal