Kenwood 50 MHZ ALL MODE TRANSCEIVER TS-590S User Manual
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Kenwood 50 MHZ ALL MODE TRANSCEIVER TS-590S User Manual

Hf/50 mhz all mode transceiver
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Distinctive Performance
TS-590S
HF/50 MHz ALL MODE TRANSCEIVER

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Summary of Contents for Kenwood 50 MHZ ALL MODE TRANSCEIVER TS-590S

  • Page 1 Distinctive Performance TS-590S HF/50 MHz ALL MODE TRANSCEIVER...

  • Page 2: About This Manual

    Kenwood Corporation; however, the title to and ownership for the software shall be owned by Kenwood Corporation. Refer to this in-depth manual and relevant technical documents, and help texts and manuals attached to the software for details.

  • Page 3: Table Of Contents

    CONTENTS 1 RECEPTION ... 1 Type of Conversion ...1 Down Conversion ...3 Up Conversion...8 RX Auxiliary Circuits...9 2 TRANSMISSION... 11 Kenwood Traditional Transmitting Circuitry ...11 2.1.1 IF Circuits ...11 2.1.2 FET Final Circuit...11 High-speed Relay-controlled Antenna Tuner...13 REMOTE Connector ...13 DRV Terminal...15...
  • Page 4 Control Program for TS-590S) Freeware ...54 8.3.1 Basic Specifications Inherited from ARCP-480... 55 8.3.2 User Interfaces ... 55 8.3.3 KNS (Kenwood Network Command System)... 56 8.3.4 Visual Scan... 58 8.3.5 Audio Equalizer... 58 ARHP-590 (Amateur Radio Host Program) Freeware ...59 8.4.1...
  • Page 5 PRODUCT PLANNING OBJECTIVES At the end of September, 2010, the TS-590S, a Kenwood HF band amateur radio transceiver was launched after the 7-year long silence since the releasing of TS-480S. As implied by this model name, TS-590S is the “legitimate successor to the TS-570S”.
  • Page 6 In evaluating a transceiver, in addition to electrical characteristics represented by numerical data, ease of operation and visibility are also important criteria. As for ease of operation, Kenwood has been developing transceivers on the basis of operability of successive HF transceivers, to which users' voices also have been reflected;...

  • Page 7: Type Of Conversion

    When it comes to the pass bandwidth of a roofing filter, at a frequency as high as 73 MHz, which is Kenwood’s mainstream first IF frequency, it is difficult to mass-produce filters with bandwidth as narrow as 500 Hz. To solve this problem, there was no other choice but to lower the first IF frequency.
  • Page 8 1 RECEPTION 1st Mixer 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.

  • Page 9: Down Conversion

    1 RECEPTION 1.2 Down Conversion Figure 1-2 Block diagram: Down Conversion Figure 1-2 describes the circuit configuration around the first mixer of the down-conversion path, showing the relationships between frequencies upon receipt of a 14 MHz signal. The signal from the antenna passes the RF BPF or LPF (as a receive LPF, it divides the frequency band of 30 kHz to 60 MHz into 12 ranges) and RF Amp (or bypasses it) to be sent into the first mixer.
  • Page 10 1 RECEPTION The receiver mixer circuit is a quad mixer consisting of four 2SK1740 JFETs. The mixer circuit achieves superior characteristics thanks to the revision of I/O port matching and the optimization of biases. With the signal provided by the first local oscillator, the RX signal is converted to 11.374 MHz (first IF frequency).
  • Page 11 Hints and Tips “Which type of conversion is used?” • During the transmission: The up-conversion configuration is always used in all modes and bandwidths. During the transmission in SSB mode, the pass bandwidth is determined by the filter settings (digital filter of the DSP) selected in the menu mode.
  • Page 12 1 RECEPTION Following is a graph that provides the comparison between the performances of roofing filters. Figure 1-5 Comparison of Bandpass Characteristics of MCFs Figure 1-5 compares the band pass characteristics of a roofing filter of center frequency 73 MHz (gray line);...

  • Page 13: Measurement Conditions

    Measurement Conditions: Receive 14.200 MHz Frequency Mode Pass bandwidth 500 Hz PRE AMP The abscissa axis shows the distance from the interfering signal. For example, it represents that at the point of 10 kHz the receive frequency is 14.200 MHz and two interfering signals of 14.210 MHz and 14.220 MHz are given.

  • Page 14: Up Conversion

    1 RECEPTION 1.3 Up Conversion Difference of characteristics due to the pass bandwidth in the roofing filter can be viewed in graphs in Figure 1-5 and Figure 1-6. So, let’s see the characteristics of the up-conversion system in which the same front end configuration is used as previous models.

  • Page 15: Rx Auxiliary Circuits

    1.4 RX Auxiliary Circuits Typical built-in RX auxiliary circuits include the variable pass bandwidth circuit, notch filter and noise blanker (NB). In modern HF transceivers, most of these auxiliary circuits (=auxiliary functions) are made possible by an arithmetic process of the DSP. As well as the TS-590S, only two auxiliary circuits operate genuinely at the IF stage: NB and AGC (ATT circuit that functions by receiving the control signal provided by the DSP).
  • Page 16 1 RECEPTION Following is a figure that represents the TX-RX UNIT that has the circuitry configuration in question. By detaching the lower case, you can access the jumper connectors CN101 through CN103. 1) Raising sensitivity in the BC band: Remove the jumper for CN103 and insert the jumper into CN102. This will increase the sensitivity in the BC band for 20 dB.

  • Page 17: Kenwood Traditional Transmitting Circuitry

    2 TRANSMISSION 2.1 Kenwood Traditional Transmitting Circuitry The tradition of high quality audio technology that users rely on Kenwood to deliver is produced by combining analog and digital technologies that Kenwood has nurtured thus far. The DSP controls modulation and determines the sound quality and analog circuits convey and amplify the signal cleanly.
  • Page 18 2 TRANSMISSION Figure 2-1 Transmit IMD Characteristics Figure 2-2 Transmit Spurious Characteristics TS-590S CONTENTS...

  • Page 19: High-Speed Relay-Controlled Antenna Tuner

    ALC terminal in order to control the output to be within an appropriate range. The ALC signal is a signal to shift the voltage in the minus direction (in Kenwood’s devices) when the output level requires regulation to satisfy the requirements of the external accessory device.
  • Page 20 2 TRANSMISSION Menu N o. 53 or N o. 54 "1 or 2" Switch RF Power Menu N o. 53 or N o. 54 "3" Switch RF Power CONTENTS 10 ms Figure 2-3 Timing chart (1 or 2) 25 ms Figure 2-4 Timing chart (3) TS-590S...

  • Page 21: Drv Terminal

    2 TRANSMISSION 2.4 DRV Terminal TS-590S is equipped with a DRV terminal that formerly was provided only for high-end transceivers. The output level of the DRV terminal is about 0 dBm (1 mW) and can be decreased to around 1/20 depending on the setting of the transmit power.
  • Page 22 2 TRANSMISSION Figure 2-6 Output Characteristics of DRV Terminal at 14.175 MHz and -10 dBm Figure 2-7 Output Characteristics of DRV Terminal at 14.175 MHz and -20 dBm CONTENTS TS-590S...
  • Page 23 2 TRANSMISSION Figure 2-8 Output Characteristics of DRV Terminal at 136 kHz and 0 dBm Figure 2-9 Output Characteristics of DRV Terminal at 136 kHz and -10 dBm TS-590S CONTENTS...
  • Page 24 2 TRANSMISSION Figure 2-10 Output Characteristics of DRV Terminal at 136 kHz and -20 dBm TS-590S CONTENTS...

  • Page 25: Local Oscillator

    3 LOCAL OSCILLATOR In the first local oscillator, instead of the conventional PLL/VCO system, a 14-bit DDS (direct digital synthesizer) is adopted to provide the output signal directly to the mixer. During the down conversion, the oscillator frequency is lower than that in up-conversion operation, and, therefore, the output has far better C/N (carrier-to-noise ratio) characteristics that contribute to superior reciprocal mixing characteristics.

  • Page 26: Multipurpose 32-Bit Floating Point Dsp

    4 DSP 4.1 Multipurpose 32-bit Floating Point DSP Figure 4-1 describes the DSP including ADCs and DACs RIF/DET VGS AO ANI/USB AI FLASH MEMORY Figure 4-1 TS-590S DSP and Peripheral Devices DSP: digital signal processor ADC: A/D converter DAC: D/A converter The heart of the signal processing function is a 32-bit floating point TMS320C6726B DSP from Texas Instruments Incorporated (Figure 4-2) and it is operated at the clock frequency of 221 MHz.

  • Page 27: Advanced Agc Control Via If Digital Processing

    DSP. Even under such conditions, the target signal is not affected by an interfering signal thanks to the sophisticated digital AGC control. Also, we have further perfected the “high quality audio” that users rely on Kenwood to deliver and has attracted so many users to previous product generations.
  • Page 28 4 DSP Figure 4-3 Control Block Diagram of IF-AGC In the attack control circuit, in addition to the normal fast gain shift function, we have added a technology to capture the signal transformation in an overshoot form and to apply moderate gain to the signal in order to lessen the audible clicks.

  • Page 29: Interference Elimination Within Agc Loop

    4 DSP 4.3 Interference Elimination Within AGC Loop TS-590S also incorporates rich and powerful interference elimination functions that work within the IF-AGC loop (Figure 4-3). The previous model (TS-2000S) already featured a digital IF filter and the auto notch filter function, and in the TS-590S, a digital noise blanker (NB2) and a manual notch filter function have been added.

  • Page 30: Types Of Digital If Filters

    4 DSP Figure 4-6 Results of Amplitude and Frequency Analysis of the Digital IF Filter (CW Mode) 0 Hz in the center that corresponds to the pitch frequency 4.3.2 Types of Digital IF Filters The following table provides possible choices of the filters and the default value (shown in bold) for respective modes.

  • Page 31: Manual Notch Filter And Auto Notch Filter

    4 DSP 4.3.3 Manual Notch Filter and Auto Notch Filter The manual notch filter is a notch filter with a frequency that can be shifted with the notch knob. The auto notch filter is a notch filter that automatically tracks a beat frequency with an adaptive filter technique.

  • Page 32: 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.

  • Page 33: Demodulation

    4 DSP 4.4 Demodulation For the demodulation of the RX signal in SSB, CW, FSK and SSB-DATA modes, we have employed the proven PSN (Phase Shift Network) design again. In the previous models (TS-2000S and TS-870S), the selection of the PSN’s characteristics was interlocked with the passband setting of the IF filter, and when the passband is narrow, a PSN with a good sideband suppression was selected.

  • Page 34: Modulation

    4 DSP 4.5 Modulation Following is how the TX signal is processed. The audio signal captured from the microphone or an external terminal is first processed by the bandwidth-limiting filter, microphone gain control, speech processor or VOX, and then, in SSB and AM modes, the signal is modulated and output as an IF signal;...

  • Page 35: Beat Cancel (Af Processing)

    4 DSP 4.6 DSP-based Auxiliary Circuits (for RX) 4.6.1 Beat Cancel (AF Processing) Beat cancel (BC), as its name implies, is designed to cancel unpleasant beat interference. Like NR1 (line enhancer), BC uses adaptive filter technology. With this technology BC tracks and cancels a beat signal just like shaping a band elimination filter.
  • Page 36 4 DSP Figure 4-10 shows how BC cancels beat signals, as monitored by an FFT analyzer. Notice how multiple beats are clearly removed by BC. There are two methods available for beat cancellation: BC1 and BC2. BC1 is tuned to be effective against weak or continuous beat interference, while BC2 cancels intermittent beats such as a CW signal.

  • Page 37: Overview Of Noise Reduction

    However, depending on the nature of the pulse noise, the noise blanker cannot suppress the noise effectively. In such a case, by using other methods such as noise reduction in conjunction, the reception conditions may be improved. 4.6.3 Overview of Noise Reduction There are two methods available for noise reduction on TS-590S: NR1 and NR2.

  • Page 38: Nr1 (Spectral Subtraction Method Af Processing)

    4 DSP 4.6.4 NR1 (Spectral Subtraction Method) (AF Processing) Unlike the conventional noise reduction methods, the spectral subtraction method of NR1 is a brand new approach of noise reduction developed for the TS-590S. NR1 estimates the noise component and takes away (subtracts) the estimated noise component from the RX signal to make the target signal emerge (Figure 4-13).
  • Page 39 4 DSP Audio spectrum components swamped by noise Figure 4-14 NR1 (Spectral Subtraction Method) (Inactive) Audio spectrum components extracted by NR Figure 4-15 NR1 (Spectral Subtraction Method) (Active) TS-590S CONTENTS...

  • Page 40: Nr1 (Based On A Line Enhancer Af Processing)

    4 DSP 4.6.5 NR1 (Based on a Line Enhancer) (AF Processing) As a noise suppression process, the line enhancer method based on a DSP has been adopted by many amateur radio transceivers in recent years. This method automatically adjusts the filter characteristics according to the characteristics of a RX signal to obtain filter characteristics suitable for passing periodic signals such as a CW signal.

  • Page 41: Nr2 (Af Processing)

    4 DSP 4.6.6 NR2 (AF Processing) NR2 is what is known as SPAC. It detects periodic signals contained in the RX signal and pieces together the detected periodic signals to produce output receive audio. As a result, only the periodic signals in the receive audio emerge clearly.
  • Page 42 4 DSP Target signal Figure 4-19 NR2: Active 4.7 DSP-based Auxiliary Circuits (for TX) 4.7.1 Speech Processor (AF Processing) TS-590S also incorporates an AF-type speech processor. Though it is an AF type, the speech processor provides sufficient compression through a unique signal processing technique. A typical voice signal tends to have the highest amplitude in the low frequency range with smaller amplitude as the frequency range increases.
  • Page 43 Also, on the TS-590S, with the ARCP-590 provided on the Kenwood Web page, you can adjust the settings in the 18-band graphic equalizer offered in its Audio Equalizer window (Figure 4-21). This function offers you more diverse options for equalizing.

  • Page 44: Software: Enhancing Operating Pleasure

    5 SOFTWARE: ENHANCING OPERATING PLEASURE In addition to the features we have explained thus far, the TS-590S comes with extensive functions to make your operation more pleasant. We will guide you through some of them. 5.1 Extended Data-mode Related Functions We have modified data-mode related settings to meet many different needs.

  • Page 45: Drive Out

    5 SOFTWARE: ENHANCING OPERATING PLEASURE Also, in data modes, the specification of the receive DSP filter is automatically switched from LO CUT/HI CUT to WIDTH/SHIFT, allowing for operations with non-voice modulation types such as RTTY and PSK31. Therefore, the IF DSP filter can be adjusted to as narrow as 50 Hz in SSB-DATA mode to deliver an interference-free output.

  • Page 46: Single Button Toggles If Filters Between A And B

    For use of the legendary slope tuning and WIDTH/SHIFT functions incorporated in successive Kenwood HF transceivers, TS-590S stores the status of two filters (FILTER A and FILTER B) set for each type of signal. Hence, you can easily switch between the filters with a single touch of a button.

  • Page 47: Double Function Keys And Hold Time Selection

    The transceiver can be configured to display a maximum of 8 characters (alphanumeric characters and some symbols) on the 13-segment display on the right side of the display screen during the powerup. As the factory default, the string “KENWOOD” is set to be displayed. TS-590S...

  • Page 48: Quick Memory Function

    5 SOFTWARE: ENHANCING OPERATING PLEASURE 5.8 Quick Memory Function The TS-590S comes with a quick memory function as did with the previous transceivers. The number of channels is a maximum of 5 as default, but you can increase the number up to 10 by setting in the menu mode.
  • Page 49  The circuit only shows the connection of DC signals. Be fully aware of loop interference of radio frequency signals and other possible issues that may arise.  We will not accept any request for fixing problems arising from connecting devices other than Kenwood’s genuine optional products regardless of the content of this document.
  • Page 50 5 SOFTWARE: ENHANCING OPERATING PLEASURE 5.11 Expansion of Voice Guide Function (Optional VGS-1 Required) The optional VGS-1 voice guide and storage unit can be installed on the transceiver. The voice guide and audio recording function that are acclaimed by sight-impaired operators become available. The following are the details of the VGS-1 and new functions added for the current version.

  • Page 51: Easy Updating Of Firmware

    Also, a transceiver is often placed on a rack and a user is sometimes forced to connect cables without seeing them. The projections will also help you in such a situation. This careful attention is also part of Kenwood’s efforts for “accessibility improvement” based on “easy operation”.

  • Page 52: Design Concept" Revealed By Designing Engineer

    The TS-590S is an HF transceiver launched by Kenwood after a long interval. We felt desperately sorry each time a customer asked us, at the annual ham fairs, when Kenwood’s new HF transceiver would be available.

  • Page 53: Structural Features

    7 STRUCTURAL FEATURES 7.1 Cooling We have designed the chassis of the TS-590S to endure heavy-duty operation. The PCBs are placed as follows: FINAL UNIT on the upper side of the chassis, TX-RX UNIT and LO UNIT on the lower side, CONTROL UNIT beneath the LO UNIT, NB UNIT and DISPLAY UNIT in front.
  • Page 54 7 STRUCTURAL FEATURES We have also paid much attention to the area and shape of the air inlets/outlets to lessen the operation noise of cooling fan motors. To reduce the noise from the air inlets/outlets, the area and shape were examined through repeated experiments and we have finally succeeded in alleviating the cooling fan motors’...
  • Page 55 As explained above, TS-590S is designed for heavy-duty operation as were the previous HF transceivers, but, as a general rule not limited to Kenwood products, the higher the temperature, the shorter the life span of an electronic device. Therefore, we recommend you use the transceiver with an appropriate output power that suits the circumstances in order to prolong the longevity of the transceiver.
  • Page 56 We would like you to confirm the beauty of the display with your own eyes. Also, as the first trial on a Kenwood HF transceiver, the color of the backlight now can be switched between amber and green. At first, the color of the backlight was amber only but, considering color visibility differs from one amateur radio operator to another in the world, we have added green.

  • Page 57: Main Control Knob

    7 STRUCTURAL FEATURES 7.3 Main Control Knob We have designed the main control knob located in the center of the front panel, focusing on easy handling and good appearance. For the encoder, a 250-pulse magnetic encoder is adopted, which enables the pulses are multiplied by 4 using software to produce 1,000 pulses per revolution so that a user can tune to the desired frequency smoothly.

  • Page 58: Expansive Application Software

    8 EXPANSIVE APPLICATION SOFTWARE 8.1 Windows Related Software This chapter describes the Windows related software to be used to control the TS-590S from a PC. Following are the Windows related software products that can be used with the TS-590S. Table 8-1 Windows Related Software for TS-590S Name ARCP-590 This software enables control of the TS-590S from a PC.

  • Page 59: The Usb Connector

    8.2.2 Controlling TS-590S from a PC using the USB Connector The microphone connected to the TS-590S and the transceiver’s built-in speaker are used. Software Virtual COM port Control signal driver and ARCP-590 Audio signal 8.2.3 Controlling TS-590S from a PC using the COM and ACC2 connectors (microphone and speaker connected to the PC to be used) The microphone and speaker connected to a PC are used.

  • Page 60: Controlling Ts-590S From A Pc On A Remote Site

    TS-590S) Freeware ARCP-590 (Amateur Radio Control Program for TS-590S) is software enabling control of the TS-590S from a PC. ARCP-590 is available free and can be downloaded from Kenwood’s website. URLs from which ARCP-590 can be downloaded: http://www.kenwood.com/i/products/info/amateur/software_download.html As with ARCP-480 for the TS-480S, the new ARCP-590 program is designed to control virtually all of the functions on the TS-590S transceiver.

  • Page 61: Basic Specifications Inherited From Arcp-480

    8.3.1 Basic Specifications Inherited from ARCP-480 The basic specifications of the ARCP-590 are inherited from ARCP-480 for the TS-480S. In addition, ARCP-590 conforms to the new functions of the TS-590S. 8.3.2 User Interfaces ARCP-590 supports Japanese and English user interface languages. A user can use ARCP-590 in the language the user is the most familiar with.

  • Page 62: Kns (Kenwood Network Command System)

    8.3.3 KNS (Kenwood Network Command System) As with ARCP-480 for the TS-480S, the ARCP-590 also enables control of the transceiver using KNS over LAN or the Internet.
  • Page 63 Edit KNS Welcome Message dialog box. Figure 8-5 KNS Welcome Message Refer also to “TS-590S KENWOOD NETWORK COMMAND SYSTEM Setting Manual” on the Kenwood’s website. Caution: You must comply with all radio and domestic laws, regulations and rules of the country or region where you are connecting with the KNS System via the Internet.

  • Page 64: Visual Scan

    8 EXPANSIVE APPLICATION SOFTWARE 8.3.4 Visual Scan ARCP-590 is capable of visually showing the location of the current RX frequency on the display and of shifting the current RX frequency to the center of the scan span. The scan center frequency and the scan span can be stored for each amateur radio band.

  • Page 65: Arhp-590 (Amateur Radio Host Program) Freeware

    8.4 ARHP-590 (Amateur Radio Host Program) Freeware ARHP-590 is the host application to control the TS-590S with Kenwood Network Command System (KNS). ARHP-590 is available free and can be downloaded from Kenwood’s website. URLs from which ARHP-590 can be downloaded: http://www.kenwood.com/i/products/info/amateur/software_download.html...

  • Page 66: Disabling Af Gain Control From Arcp-590

    You can check the status of the power of the TS-590S (Power ON or Power OFF) and your connection and transmission statuses. 8.4.3 KNS (Kenwood Network Command System) For details of Kenwood Network Command System, refer to 8.3.3. KNS (Kenwood Network Command System). 8.4.4 Disabling AF Gain Control from ARCP-590 ARHP-590 has a capability to disable the AF gain control from the ARCP-590.

  • Page 67: Basic Functions

    8.5.1 Basic Functions If ARUA-10 and ARCP-590 are used in combination, you have only to connect the TS-590S and a PC with a single USB cable to use the microphone and speaker connected to the PC in place of those on the transceiver. To use ARCP-590 over a USB cable connection, the virtual COM port driver needs to be installed.

  • Page 68: Starting And Stopping Arua-10

    To adjust volume of ARUA-10, right click the “ARUA-10” icon in the Windows task tray and select “Volume” in the menu and from the volume screen adjust volume. For details, refer to “TS-590S USB Audio Setting Manual” on the Kenwood’s website. 8.5.6 Automatic Execution when Windows Starts ARUA-10 is capable of starting automatically at the start of Windows.

  • Page 69: New Arvp-10H (Amateur Radio Voip Program) Freeware

    TS-590S is connected) and the ARVP-10R program that provides the VoIP function at the remote station (which controls the transceiver remotely). ARVP-10H and ARVP-10R are available free and can be downloaded from Kenwood’s website. URLs from which ARVP-10H and ARVP-10R can be downloaded: http://www.kenwood.com/i/products/info/amateur/software_download.html...

  • Page 70: Making Arvp-10H (Host Station Online Or Offline

    8 EXPANSIVE APPLICATION SOFTWARE 8.6.1 Basic Functions ARVP-10H and ARVP-10R enable a voice signal to be sent and received over LAN or the Internet. 8.6.2 Setup of ARVP-10H (Host Station) Configure the necessary settings to use ARVP-10H. Select “User Settings” from the File pulldown menu and click the “Add...” button in the User Settings dialog box and the Setup User dialog box will appear, In Setup User dialog box, you can set the user name and password.

  • Page 71: Connecting And Disconnecting Arvp-10R (Remote Station)

    8.6.4 Setup of ARVP-10R (remote station) Configure the necessary settings to use ARVP-10R. Select “ARVP-S10R Settings” from the File pulldown menu and click the “Add...” button in the ARVP-10R Settings dialog box and the Detailed Settings dialog box will appear. In Detailed Settings dialog box, you can set the connection name, IP address, the port number, user name and password.

  • Page 72: New Virtual Com Port Driver

    PC. URLs from which virtual COM port driver can be downloaded: http://www.kenwood.com/i/products/info/amateur/software_download.html If you connect the TS-590S and a PC using an RS-232C cable, the virtual COM port driver does not need to be installed.
  • Page 73 PS-60 received safety certificates in many countries in the world and incorporates the following protection features. Furthermore, the power supply has gone through safety and durability tests conducted according to Kenwood’s criteria to ensure your safe operation. <Overcurrent Protection Feature>...
  • Page 74 9 OPTIONAL ACCESSORY 9.2 Rectifier Circuit  Adopts a PFC Circuit that does not Produce Harmonics in an AC Rectifier Circuit A switching power supply typically produces large harmonics in the rectifier circuit by its switching operation which compromises the phase factor and may cause noise and other disturbances to external devices due to the harmonics that are reflected back to the AC input side.
  • Page 76 Revision 1.00 May 15, 2011...

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