TS-590SG_IDM.pdf

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1、 About This Manual This in-depth manual is intended to explain the features of the TS-590SG and its convenient use. In addition to those who have purchased or are considering the purchase of the TS-590SG, this manual can also be made use of by a wide range of users as a handbook for HF transceivers.

2、 Copyright Copyright of this Manual and Software A user is required to obtain approval from JVC KENWOOD Corporation, in writing, prior to redistributing this document on Internet websites and others. A user is prohibited from transferring, renting, leasing or reselling the document. All intellectual

3、 property rights, including the copyright of this manual, as well as all manuals and documents that are supplied with our software, shall belong to JVC KENWOOD Corporation. This software program is intended for use by licensed users of KENWOOD brand products, and is not for sale. Users owns the righ

4、t only for the media content stored in this software. JVC KENWOOD Corporation retains the right to the software program. JVC KENWOOD Corporation does not guarantee the compatibility of the quality and functions of our software described in this or other related manuals with the intended use of the u

5、ser. JVC KENWOOD Corporation also will not bear any liability for defects and guarantees with regard to the software except for those expressly stated in this document. Firmware Copyright Firmware refers to software programs stored inside the memory of KENWOOD brand products for which the copyright

6、is owned by JVC KENWOOD Corporation. Acts such as modification, reverse engineering, duplication, or release of the firmware on Internet websites without prior written approval from JVC KENWOOD Corporation are strictly forbidden. Transfer or sale of firmware that is not stored in a KENWOOD brand pro

7、duct to a third party is strictly prohibited. Trademarks and Intellectual Properties Windows Vista, Windows 7, Windows 8, Windows 8.1 and the Windows logo are registered trademarks of Microsoft Corporation in the United States and/or other countries. All other product names referenced herein are tra

8、demarks or registered trademarks of their respective manufacturers. and are omitted in this manual. Other Restrictions The measured values exampled in this document are examples and do not guarantee the performance of the model. Table of Contents i GETTING STARTED Product Planning Objectives .1 Key

9、Changes from TS-590S to TS-590SG .1 Circuit . 1 Appearance / Mechanism . 2 Function / Software . 2 01 RECEPTION 1.1 Type of Conversion.3 1.2 Down Conversion .5 1.3 Up-Conversion .10 1.4 RX Auxiliary Circuits .10 02 TRANSMISSION 2.1 KENWOOD Traditional Transmitting Circuitry .13 2.1.1 IF Circuits . 1

10、3 2.1.2 ALC Circuit . 13 2.1.3 FET Final Circuit . 13 2.2 High-speed Relay-controlled Antenna Tuner .15 2.3 Linear Amplifier Control .15 2.3.1 REMOTE Connector . 15 2.3.2 Setting Menu of Linear Amplifier Control . 15 2.3.3 ALC Operation when Connected to an External Device . 18 2.4 DRV Terminal .19

11、03 LOCAL OSCILLATOR 04 DSP 4.1 Multipurpose 32-bit Floating Point DSP .22 4.2 Advanced AGC Control via IF Digital Processing .23 4.3 Interference Elimination Within AGC Loop .25 4.3.1 Digital IF Filter . 25 4.3.2 Types of Digital IF Filters . 26 4.3.3 Manual Notch Filter and Auto Notch Filter . 27 4

12、.3.4 Noise Blanker (NB2) . 28 4.4 Demodulation .29 4.5 Modulation .30 4.6 DSP-based Auxiliary Circuits (for RX) .31 4.6.1 Beat Cancel (AF Processing) . 31 4.6.2 Noise Blanker NB2 (IF Processing) . 32 4.6.3 Overview of Noise Reduction . 34 4.6.4 NR1 (Spectral Subtraction Method) (AF Processing) . 34

13、4.6.5 NR1 (Based on a Line Enhancer) (AF Processing) . 35 4.6.6 NR2 (AF Processing) . 36 4.7 DSP-based Auxiliary Circuits (for TX) .37 4.7.1 Speech Processor (AF Processing) . 37 4.8 DSP-based Auxiliary Circuits (Common to TX/RX) .38 4.8.1 TX Equalizer and the roofing filters of the center frequency

14、 11.374 MHz with bandwidth of 500 Hz (blue line) and with bandwidth of 2.7 kHz (orange line) that are both employed by the TS-590S. Because the center frequency of the filters diff er, graphs are overlapped at the center frequency. The frequency indicated as 0 kHz at the center of the Frequency kHz

15、axis is the receive frequency. It is apparent that when down conversion is active, large attenuation is achieved at frequencies other than the target signal. It may be diffi cult to understand from the figure but for a filter with a bandwidth of 500 Hz, the attenuation is approximately 70 dB and 40

16、dB when the frequency is detuned 1 kHz and 0.5 kHz respectively from the center frequency. Only the down conversion configuration can use filters with this kind of characteristic. Figure 1-6 Comparison of Dynamic Range Characteristics RECEPTION 01 9 Figure 1-6 shows the measurements for the third-or

17、der dynamic range characteristics of TS-590SG with the distance from the interfering signal altered. As a comparison, the results for an existing model, TS-480HX/SAT (up-conversion, 500 MHz, built-in CW filter), are displayed side by side with the readings for TS-590S (*extracted from the QST magazi

18、ne 2011 May issue of product review; reprinted with permission of ARRL). The third-order dynamic range characteristics of the TS-590SG are almost fl at up to 2 kHz. The intercept point calculated from these readings is +33 dBm. Measurement Conditions: Receive Frequency 14.200 MHz ModeCW Pass bandwid

19、th500 Hz PRE AMPOFF 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. The orange line indicates the result of TS-590SG; the m

20、ark indicates the result of TS-590S; and the gray line indicates the result of TS-480HX/SAT. The dynamic range of all the products exceeds 105 dB with an interfering signal separation of more than 20 kHz. However, as the interfering signal approaches the receive signal, the dynamic range of the up-c

21、onversion type TS-480HX/SAT, which does not make use of a roofing filter with a narrow bandwidth, becomes smaller. This is attributable to the deterioration in the attenuation of the interfering signal due to the wide passband width of the roofing filter. Meanwhile, diff erence is observed between t

22、he TS-590SG and TS-590S particularly when it is close to the receive signal at 2 kHz. This is due to infl uence from the NB filter immediately after the first mixer. On the TS-590SG, the signal passes through the NB filter when the NB is OFF, enabling the full performance of the roofing filter. Note

23、: Measurements of the receive frequency and adjacent bands A diff erent measurement method was adopted, which accounts for the diff erent results between the data of the TS-590S published in the catalog and in-depth manual and the ARRL measurements. During measurement of the published data for the T

24、S-590SG, the same method adopted by ARRL is used for measuring the third-order dynamic range to prevent diff erences from arising as a result of the measurement method Figure 1-6 shows the measurements for the TS-590SG based on random sampling of the mass-produced items. (Data used in the catalog is

25、 obtained based on the prototype.) The outcome is an example, and does not warrant the performance of the product. 01 RECEPTION 10 1.3 Up-Conversion Diff erence 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, lets see the c

26、haracteristics of the up-conversion system in which the same front end configuration is used as previous models. We will explain using the measurement result that compares the dynamic range characteristics of TS-590S and of previous models in the 50 MHz band. Figure 1-7 Dynamic Range in the 50 MHz B

27、and Measurement Conditions: Receive Frequency 50.200 MHz ModeCW Pass bandwidth500 Hz PRE AMPOFF Comparison targetTS-480HX/SAT (equipped with YF-107C CW filter) (The measurement method is the same as that was applied to 14.2 MHz.) In the 50 MHz band, the signal is received with up-conversion on both

28、the TS-590S/SG and the TS-480HX/SAT. If the separation between the target signal and the interfering signal drops below 20 kHz, the dynamic range decreases on both transceivers. However, on the TS-590S/SG, the outcome is improved for 15 dB even within the pass bandwidth of the MCF. This is thanks to

29、 the drastic modification of circuitry of the up-conversion section that was reviewed coupled with the down- conversion path being added. The same circuit is also used in WRC bands and in general coverage receiving as well as in the 50 MHz band, and therefore the equivalent performance improvement i

30、s made in those bands. 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

31、the DSP. As well as the TS-590S/SG, 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). On the TS-590S/SG, there are two methods available to achieve noise blanking: NB1 and NB2. NB1 is realized b

32、y analog processing and NB2 by digital processing of the IF DSP. Still retaining an analog noise blanker, TS-590S may seem out of step with the times. But it is critical to have an analog noise blanker for a receiving system design using narrow roofing filters. RECEPTION 01 11 Noise is typically pul

33、se-shaped and when the noise passes a narrow filter, the pulse waveform is changed to have a wider (longer) pulse width. Within the DSP, the processing block of the noise blanker is placed in a stage earlier than the filter block that determines the final pass bandwidth. Thus, even if the final pass

34、 bandwidth is narrowed, the blanking operation can work properly, free of the infl uence of the narrowed bandwidth. However, roofing filters are located far earlier than the DSP, in the later stage of the first mixer. As a result, in the event the bandwidth of the roofing filter becomes as narrow as

35、 500 Hz, the pulse width becomes wider and a conventional digital noise blanker would not deliver a suffi cient blanking eff ect. This is the exact case while down conversion is active on the TS-590S/SG and a digital noise blanker alone may not produce a great enough eff ect. That is the reason we h

36、ave placed a filter of pass bandwidth 6 kHz right after the first mixer. The filter deters the transformation of the pulse shape and prevents false operation of the noise blanker due to adjacent signals while sending the noise signals to the analog noise blanker. During the up-conversion, the noise

37、signal is derived from the second IF stage and delivered to the noise blanker circuit as in previous models. For the diff erences in operation for NB1 and NB2, refer to “Hints and Tips” in 04 DSP 4.6.2 “Noise Blanker NB2 (IF Processing)”. Hints and Tips Improvement of sensitivity in the BC band and

38、alteration in ATT attenuation On the TS-590S/SG, by changing the circuitry configuration inside the transceiver, you can change the sensitivity in the BC band and the attenuation amount of the ATT key on the front panel. Following is a figure that represents the TX-RX UNIT that has the circuitry con

39、figuration in question. By detaching the lower case, you can access the jumper connectors CN101 through CN103. Figure 1-8 TX-RX UNIT 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. (Assu

40、ming that there is the high output power in local broadcasting stations in the BC band, the factory default setting for sensitivity is lowered by 20 dB.) 2) Changing the attenuation amount of ATT: Remove the jumper of CN101. This changes the attenuation of ATT from 12 dB to 20 dB. (Store the removed

41、 jumper in a secure place for future use.) 01 RECEPTION 12 Hints and Tips The output level of the headphone jack is too high? The TS-590S is designed based on connection with a headphone with an impedance of 8 . Therefore, if you use a headphone with impedance higher than 8 , you will experience the

42、 following symptoms. The volume level is too high overall. Even if AF Volume is turned down, a hissing residual noise is audible. If you experience these symptoms, use a set of headphones with impedance close to 8 . The TS-590SG lowers the impedance at the headphone jack to reduce these kinds of sym

43、ptoms when a high impedance headphone is used. This will reduce the hissing noise by approximately 8 dB compared to TS-590S when the impedance of the headphone is 32 . In this case, increase the AF VR slightly to adjust to the same volume as TS-590S. Hints and Tips Antenna output connector In recent years, spectrum scope is realized externally by combining receivers of the direct mixer type or digital conversion type, which are collectively referred to as SDR, with PCs and applications, and connec