User Manual

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Demodulator Structure
The G303 Professional Demodulator implements the general quadrature
representation of all narrow-band modulated signals. Such signals can
always be considered as the sum of two amplitude-modulated carriers
having a 90 degree offset, usually referred to as I and Q. Users familiar with
Software Defined Radio digital signal processing concepts, will find the
G303 Professional Demodulator to be a useful tool for experimentation and
study, where the effects of various filter settings can be easily observed and
optimized.
The entire demodulation process can be observed in the demodulator
structure window, accessible from within the demodulator settings (press the
Setup button under the CW mode button), then the large View
Demodulator Structure button). Each mode has its own associated
structure. By selecting the mode either using the front panel or the tabs at
top-right of the set-up window, you can observe the different structures
applicable to the selected modes. Each mode also has its own set of filter
settings available for experimentation.
AM Demodulator Structure