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WiNRADiO G3XX User’s Manual
The CW received signals are first down-converted to zero Hz, and then, after
additional channel filtering, up-converted to a convenient audio frequency. This
frequency (a digital BFO) is user-adjustable, by changing the value of the CW
tone frequency parameter in the demodulator setup.
additional channel filtering, up-converted to a convenient audio frequency. This
frequency (a digital BFO) is user-adjustable, by changing the value of the CW
tone frequency parameter in the demodulator setup.
CW Demodulator Structure
Finally, the frequency demodulator performs a time derivative function on
arctangent of Q over I, to arrive at amplitude-independent frequency
demodulation of the input signal:
arctangent of Q over I, to arrive at amplitude-independent frequency
demodulation of the input signal:
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