Kenwood TS-590S manual Digital Noise Blanker NB2

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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).

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CONTENTS

TS-590S

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Contents TS-590S About Copyright Copyright of this Manual and SoftwareAbout Trademarks and Intellectual Properties Other RestrictionsContents Optional Accessory Product Planning Objectives Development Spirit Reception Type of ConversionReception Block diagram Down Conversion Down ConversionMCF Hints and Tips Comparison of Bandpass Characteristics of MCFs Measurement Conditions Up Conversion Dynamic Range in the 50 MHz BandRX Auxiliary Circuits CN101 CN102 CN103 Transmission Kenwood Traditional Transmitting CircuitryIf Circuits FET Final CircuitTransmission Remote Connector High-speed Relay-controlled Antenna TunerMenu N o or N o 1 or DRV Terminal Transmission Output Characteristics of DRV Terminal at 136 kHz and 0 dBm Transmission Comparison C/N Characteristics Local OscillatorDSP Multipurpose 32-bit Floating Point DSPAdvanced AGC Control via if Digital Processing DSPControl Block Diagram of IF-AGC Interference Elimination Within AGC Loop Digital if FilterTypes of Digital if Filters LOW CUTManual Notch Filter and Auto Notch Filter Digital Noise Blanker NB2 Demodulation Modulation Beat Cancel AF Processing DSP-based Auxiliary Circuits for RXNoise Blanker NB2 if Processing Overview of Noise Reduction 11 NB2 Inactive4 NR1 Spectral Subtraction Method AF Processing 13 Conceptual Scheme of NR1 Based on Spectral SubtractionAudio spectrum components swamped by noise 5 NR1 Based on a Line Enhancer AF Processing 16 NR1 Line Enhancer Method Inactive6 NR2 AF Processing 18 NR2 InactiveDSP-based Auxiliary Circuits for TX Speech Processor AF ProcessingDSP-based Auxiliary Circuits Common to TX/RX TX Equalizer & RX Equalizer AF ProcessingSoftware Enhancing Operating Pleasure Extended Data-mode Related FunctionsDrive Out Software Enhancing Operating PleasureSingle Button Toggles if Filters between a and B Operation in the 135 kHz BandDouble Function Keys and Hold Time Selection Mode Selection of Built-in Electronic KeyerPower-on Message PF Keys Quick Memory FunctionCross Tone Function MIC CN Expansion of Voice Guide Function Optional VGS-1 Required Easy Updating of Firmware Projections on the Rear PanelA Sketch of the TS-590S Structural Features CoolingStructural Features Heat Sink Section LCD Amber and GreenMain Control Knob Main Control KnobSystem Configurations Controlling TS-590S from a PC using the COM ConnectorExpansive Application Software Windows Related SoftwareControlling TS-590S from a PC using the USB Connector ConnectionControlling TS-590S from a PC on a Remote Site Software HardwareBasic Specifications Inherited from ARCP-480 User InterfacesKNS Kenwood Network Command System Menu FunctionKNS Welcome Message Visual Scan Audio EqualizerBasic Specifications Inherited from ARHP-10 ARHP-590 Amateur Radio Host Program FreewareNew ARUA-10 USB Audio Controller Freeware Disabling AF Gain Control from ARCP-590Operation SetupBasic Functions Starting and Stopping ARUA-10 Adjusting VolumeAutomatic Execution when Windows Starts New ARVP-10H Amateur Radio VoIP Program Freeware 12 Main Window of ARVP-10HSetup of ARVP-10H Host Station Making ARVP-10H host station Online or OfflineSetup of ARVP-10R remote station Connecting and Disconnecting ARVP-10R Remote StationNew Virtual COM Port Driver 16 Device ManagerOptional Accessory PS-60 Regulated DC Power SupplyRectifier Circuit Comparing Rectification WaveformsPage Revision 1.00 May 15
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