Kenwood TS-590S manual Reception

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1 RECEPTION

1st 11.374 MHz

500 Hz

2.7 kHz

Down-conversion path Double superheterodyne

For 1.8/ 3.5/ 7/ 14/ 21 MHz Amateur bands If RX passband is 2.7 kHz or less

When receiving in SSB/ CW/ FSK modes

IF

DSP

1st Mixer 73.095 MHz 2nd Mixer 10.695 MHz

3rd Mixer

24 kHz

Up-conversion path Triple superheterodyne

For all the conditions (incl. when transmitting) other than listed above for down conversion

(Blocks that are not relevant for the explanation of the conversion type are omitted.)

Figure 1-1 Dual-mode Conversion Frequency Configuration

First, let us begin with explanation about the up-conversion path.

In the up-conversion path, double-headed arrows are shown at each stage pointing in both directions. This means a transmit signal as well as a receive signal is processed in the up- conversion path. The circuit configuration is a triple-conversion design featuring an IF DSP, a typical configuration for an HF transceiver. (Replacing the IF DSP with an AF DSP and the third Mixer with a modulator and demodulator changes it to be the configuration of TS-480S.)

The pass bandwidth of the filter is about 15 kHz at 73.095 MHz, and at 10.695 MHz, it varies depending on the mode and the RX bandwidth. In CW, SSB and FSK modes, the bandwidth is 2.7 kHz, in AM mode 6 kHz, and in FM mode 15 kHz. (In transmit, the signal passes the 6 kHz filter regardless of the mode. The final bandwidth is determined by the DSP.)

The up-conversion path is applied only in conditions when no down-conversion path is used. Next is the down-conversion path.

In the down-conversion path, only a single-ended arrow is shown at each stage. This means the down-conversion operation is applied only to RX signals.

Also, in the figure the conditions in which the down conversion operates are described. These conditions are designed to cover the bands, modes and bandwidths that are commonly used in a contest and on similar occasions.

On the surface, the circuit configuration may seem too complex and wasteful. Still, due to the frequency configuration that focuses on particular points, the general coverage reception across the continuous frequency range of 30 kHz through 60 MHz covered by the VFO is maintained as on previous models. As a result, we have successfully produced a transceiver in a competitive price range that achieves excellent receive performance comparable to the most high-end HF transceivers on the market.

As for the up-conversion path, though the same frequency configuration is used as in the previous models, the roofing filters have been improved to have better characteristics to protect against interference within the pass bandwidth. For details, refer to 1.3 Up Conversion.

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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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