Sub Scope - Kenwood TS-990S In-Depth Manual

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SOFTWARE 07

Sub Scope

The sub‑scope displays the spectrum of a received audio signal to be processed through FFT (Fast Fourier Transformation).

That is, it draws the image (spectrum) of a practical audible sound. To make the relationship between the filter cut‑off

frequency and the demodulated frequency spectrum comprehensible, these are superimposed and drawn. The relationship

between the target signal and interference signals in the passband can instantly be viewed in parallel to listening to the

signal.

While the manual notch filter or band elimination filter is active, the indicator of the notch center frequency is added. The

notch frequency can be adjusted with the [NOTCH] knob by not only hearing the elimination state of the interference

signal but also viewing the status of the interference signal attenuation.

The X‑Y scope and vectorscope, mainly used for tuning in RTTY mode or PSK mode, are designed with an oscilloscope

image. An audio FFT scope can be displayed on the main screen enabling you to tune it by observing the scope.

Fig. 95 ΔF Display

Fig. 98 Enlarged Single‑Frequency Value Display

Fig. 96 Mechanical Dial Display

Fig. 99 Enlarged Frequency Value Display (No Scope)

Fig. 97 X‑Y Scope (FSK Mode)

Fig. 100 Vector Scope (PSK Mode)

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