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(3) It comes with analogue demodulation, where the demodulating
frequency equals to the
(4) The maximum frequency span of the spectrum is 15MHz. Instead of
being the montage of the FFT result, it's now real-time.
There are minor differences elsewhere, like waterfall curve and fluorescent
display mode.
3.2.1 VFO
VFO, also known as Variable-Frequency Oscillator, refers to local oscillator
in superheterodyne receiver. For the time being it's accustomed to use VFO to
refer to the free frequency adjusting mode.("free" compared to channel mode).
For disambiguation, KC908 hereby adopts the latter definition.
The machine comes with 2 VFO, VFOA and VFOB. Settings between them
are independent, just choose one of them when using. The main purpose of
offering 2 VFO is to provide convenience switching between two monitoring
frequencies swiftly. The two VFOs cannot work simultaneously, despite the
possibility in the hardware layer.
Apart from setting frequency freely, VFO mode also enables the user to
read channels and the peak list saved by the spectrometer.
To spare different frequency setting custom, both VFOA and VFOB chop
frequency spectrum into a number of segments. The majority of parameters'
central frequency of the spectrum.
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