Kenwood TS-590S manual Digital Noise Blanker NB2

4 DSP

There are two settings on the manual notch filter: Normal and Wide. You can choose one of two bandwidths for the notch filter (Figure 4-8). For a simple beat frequency, Normal is effective. If there is an interfering SSB signal, or in the event the target signal is also trimmed by LO CUT/ HI CUT, a Wide setting of the Notch filter used in combination with LO CUT/HI CUT may be effective.

Figure 4-8 Results of Amplitude and Frequency Analysis of the Manual Notch Filter

The shifting of the notch frequency with the notch knob is not actually done by switching the notch filters depending on the knob position. In fact, within the DSP, the notch filter frequency is fixed and the frequency shift is made possible by altering the IF signal frequency.

The auto notch filter inherited from the TS-2000S and the TS-870S also has been improved to deliver better capability to track the beat frequency. The enhanced notch filter has good effect even on a relatively weak beat signal. The auto notch filter is sharper, like a needle, than the manual notch filter and can minimize the impact of the notch on the audio.

4.3.4 Digital Noise Blanker (NB2)

Refer to 4.6.2 Noise Blanker NB2 (IF Processing).

26

CONTENTS

TS-590S