TS-2000_X_serv.pdf

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1、 2000-12 PRINTED IN JAPAN B51-8558-00 (N) 889 ALL MODE MULTI-BAND TRANSCEIVER TS-2000/X SERVICE MANUAL CIRCUIT DESCRIPTION. 2 DESCRIPTION OF COMPONENTS . 24 SEMICONDUCTOR DATA . 34 PARTS LIST. 51 EXPLODED VIEW. 93 PACKING . 97 ADJUSTMENT . 98 TERMINAL FUNCTION. 124 WIRING. 133 PC BOARD VIEWS / CIRCU

2、IT DIAGRAMS FILTER UNIT (X51-315X-XX). 135 FINAL UNIT (X45-360X-XX) . 137 DISPLAY UNIT (X54-3320-00) . 151 CONTROL UNIT (X53-391X-XX) . 155 TX-RX 1 UNIT (X57-605X-XX). 169 TX-RX 2 UNIT (X57-606X-XX). 186 TX-RX 3 UNIT (X57-6070-00) . 209 BLOCK DIAGRAM. 223 LEVEL DIAGRAM. 229 MC-52DM . 233 UT-20 . 235

3、 RC-2000 . 235 ARCP-2000 . 235 SPECIFICATIONS. 236 Knob (K21-1104-03) Knob ring (K29-5395-04) Knob (K29-5397-13) x 2 Knob (K29-5398-03) x 3 Knob (K29-5399-03) x 3 Knob (K29-5396-03) x 2 Key top (K29-5391-02) Key top (K29-5393-12) Key top (K29-5394-12) Key top (K29-5392-12) Front glass (B10-2608-02)

4、Cabinet (Upper) (A01-2176-01) Foot (J02-0442-04) x 2 Foot (J02-0440-04) RF coaxial receptacle (Round) (E06-0858-15) Phone jack (9P) (E11-0438-05) CONTENTS Downloaded by? RadioAmateur.EU 2 TS-2000/X Overview of the Operation The TS-2000/X basically consists of an all-mode-receiver incorporating an IF

5、/AF DSP for satellite communication with an independent FM/AM sub-receiver for the VHF and UHF bands. I Overview of the operation of the all-mode trans- ceiver unit (main band side) with an IF/AF DSP for satellite communication The receiver unit has an independent front end for each of the HF, 50MHz

6、, 144MHz, 430MHz and 1.2GHz bands (some products do not support the 1.2GHz band). The cir- cuits following the 10.695MHz IF stage are common to all the bands. (Thus, it cannot receive two SSB signals at the same time.) The IF frequency of the transmitter unit is shifted from the IF frequency of the

7、receiver unit by 100kHz to enable satellite operation (full duplex operation). The final section is independent of the HF, 50MHz, 144MHz, 430MHz and 1.2GHz bands. Consequently, you can select a combination of bands permitting satellite communication from the HF, 50MHz, 144MHz, 430MHz and 1.2GHz band

8、s. The transmitter unit and receiver unit on the main band side operate simultaneously during satellite transmission. The receiver unit on the sub-band side does not work. (The sub-band receiver is not used during satellite operation.) Two 16-bit DSP ICs are used; one performs IF processing (main ba

9、nd side) and the other carries out AF processing (main and sub bands). Although the DSP IC is a 16-bit unit, it carries out “double-precision operations” for critical parts of IF processing to perform 32-bit equivalent processing. In addition, the DSP IC uses a 100-MHz high-speed internal clock. The

10、 conversion from an analog signal to a digital sig- nal (A/D conversion) is performed with 24 bits at high preci- sion. The DSP circuit for IF operates in any mode other than FM mode for both transmission and reception. FM modula- tion, detection and squelch processing are conventional ana- log proc

11、esses. (The processing prior to modulation and af- ter demodulation in FM is performed by the DSP.) In the mode in which the IF DSP circuit operates, it car- ries out modulation and demodulation, digital IF filtering, digital AGC, and CW waveform processing during transmis- sion, as in the TS-870. A

12、ll these functions are operated in all the bands on the main band side, including satellite opera- tion. The AF unit is processed by the DSP in all modes. The operating range of the DSP circuit depends on the mode, but it performs beat cancellation, noise reduction, AF DSP filtering, etc. I Overview

13、 of the operation of the independent FM/AM sub-receiver unit (sub-band side) for the VHF and UHF bands The local oscillator system and IF/AF signal system of the sub-receiver unit are independent of the main band side. Therefore, the sub-band receiver can receive signals while the main band receiver

14、 is sending a signal. (Except when reception is impossible due to harmonics of the transmit fre- quency and when the main band and sub-band are on the same frequency band.) The sub-band receive signal is branched from the RF unit on the main band side. It is, therefore, not necessary to install a de

15、dicated antenna for sub-band reception. Transmission can be performed with the sub receive fre- quency by shifting the “PTT band” to the sub-band side. It is made possible by internally using the transmission func- tion on the main band side. AF processing is also carried out by the DSP on the sub-

16、band side and the noise reduction function works. The sub-band reception function, including display, can be turned off. Frequency Configuration (Fig. 1) This transceiver utilizes double conversion in FM mode and triple conversion in non-FM modes during transmission. It utilizes triple conversion in

17、 FM mode and quadruple conversion in non-FM modes during reception. The fourth 12kHz IF signal is converted from analog to digital and con- nected to the DSP. When the carrier point frequency of the signal input from the antenna is fIN, the relationship between these signals when demodulating this s

18、ignal is expressed by the following equations: HF MAINfIN = fLO1 fLO2 fLO3 + fLO4 12kHz VHF MAINfIN = fLO1 fLO2 fLO3 + fLO4 12kHz UHF MAINfIN = fLO1 + fLO2 + fLO3 fLO4 + 12kHz 1.2G MAINfIN = fLO1 x 2 + fLO2 + fLO3 fLO4 + 12kHz Reference Signal Generation Circuit The 15.6MHz reference frequency fstd

19、for PLL frequency control is generated by the TCXO (X400). The signal passes through a buffer amplifier (Q420) and is used as the refer- ence signal for the second local oscillator (HFLO2) for HF band reception and the first local oscillator (SLO1) subband reception. The reference signal is doubled

20、by Q412, and the result- ing 31.2MHz signal is used as the reference signal for DDSs (IC406, IC407, IC408, IC601, IC602, IC603). The 31.2MHz signal is supplied to the TX-RX2 unit (X57- 606 A/11) as LO2 for VHF and UHF bands. CIRCUIT DESCRIPTION 3 TS-2000/X 68.985MHz 75.825MHz TX MIX TX MIXTX MIX TX

21、MIXTX MIX 69.085MHz 10.695MHz 10.595MHz 75.925MHz RX MIXRX MIXRX MIXDET TCAR 10.583MHz 455kHz LO3 11.150MHz LO1HF 75.955 129.085MHz LO2 58.390 65.230MHz RCAR 467kHz 41.795MHz LO1TX 183.795418.205MHz (K) 185.795398.205MHz (E) RX MIXRX MIX41.895MHz SUB RX MIX 58.525MHz LO1RX 183.895 418.105MHz (K) 185

22、.895398.105MHz (E) SLO2 58.070MHz TX MIXTX MIX 135.395MHz RX MIXRX MIX 135.495MHz 1.2GLO1 1104 1165MHz LO31 31.2MHz Mixer IF detector 2 SLO1 322.95 465.04MHz (K) 371.475409.050MHz (E) HF/ 50MHz UHFVHF 1.2G 1.2GLO2 124.8MHz DSP MIC input AF output HF/50MHz LO1 When the HF and or 50MHz band is operati

23、ng in the main band, the HF REF VCO (Q427) generates 31.17 to 32.834 MHz. (See Table 1, frequency configuration.) The output signal from the DDS (IC408) is input to pin 8 of the PLL IC (IC409) for HF REF, divided into 1/16 in IC409 to produce comparison frequency f 2 of 487 to 513kHz. The output sig

24、nal from the VCO (Q427) goes to pin 6 of PLL IC (IC409), is divided into 1/64 in IC409, and compared with the signal with comparison frequency f 2 by a phase comparator. The frequency is locked and the HF REF signal is output. The output signal from the PLL IC (IC409) for HF REF is fed to pin 8 of t

25、he PLL IC (IC414) for HF LO1 as a reference frequency, and divided to produce comparison frequency f 1 of 975 to 1358kHz. The HF LO1 VCO (Q459, Q460, Q464) generates 75.955 to 129.185MHz. The output from this VCO goes to pin 6 of IC414, is divided into 1/N 1 in IC414, compared with the sig- nal with

26、 comparison frequency f 1 by a phase comparator. The frequency is locked and the HF LO1 output frequency is generated. The DDS (IC408) sweeps output frequency (7.792 to 8.209MHz) in 10Hz steps by equation fDDS STEP (Hz) = (10*R 1)/(N 1*4) and in 1Hz steps by equation fDDS STEP (Hz) = (1*R 1)/(N 1*4)

27、, the HF LO1 covers the frequencies of 75.955 to 129.085MHz in 10Hz or 1Hz steps. One of three VCOs (Q459, Q460, Q464) is selected by the signal (HF VCO1,HF VCO2,HF VCO3) from the serial-par- allel IC (IC404). The output from the VCOs (Q459, Q460, Q464) passes through a buffer amplifier (Q462), is a

28、mplified by Q476, and passes through a low-pass filter. The impedance is con- verted by an attenuator and the signal is output as HFLO1. The cut-off frequency of the low-pass filter in the output section is changed by turning Q474 ON/OFF with a VCO se- lect signal (HF VCO1). Fig. 1Frequency configur

29、ation CIRCUIT DESCRIPTION Downloaded by? RadioAmateur.EU 4 TS-2000/X HF LO2 When the HF and or 50MHz band is operating, the HF LO2 VCO (Q409) generates 65.230 to 58.390MHz. (See Table 1, frequency configuration.) The 15.6MHz reference signal fstd is input to pin 8 of the PLL IC (IC401) for HF LO2, d

30、ivided into 1/226 and 1/319 in IC401 to produce comparison frequency f of 69.027 to 48.903kHz. The output signal from the VCO (Q409) goes to pin 6 of IC401, its frequency is divided into 1/945 and 1/1194 in IC401, compared with comparison frequency f by a phase Display frequencyLO1 OUTIC414 :HF REFI

31、C409 :DDS output (MHz) fRX (MHz)(MHz)LMX2306TMX(MHz)LMX2306TMXIC408 : AD9835BRU StartStopR1N1N2R2 0.030000 1.999999LO132 76HF REF6416fDDS 2.000000 5.999999 = fRX + IF30 75 = (f RX + IF) *R1 = HF REF *R2 6.000000 8.99999932 84 N1 N2 9.00000012.99999930 75 13.00000016.99999932 84 17.00000017.99999932

32、92 18.00000021.99999930 90 22.00000023.99999932100 24.00000024.99999932 92 25.00000025.99999930 90 26.00000029.99999924 78 30.00000032.99999932100 33.00000036.99999930 97 37.00000040.99999932115 41.00000044.99999932119 45.00000048.99999930115 49.00000051.99999930113 52.00000055.99999930115 56.000000

33、60.00000032127 LO2 OUTIC401 :IF (MHz)LMX2306TMX N3R3RXTX 65.230088 94522675.92508875.825088 58.389969119431969.08496868.984968 65.230088 94522675.92508875.825088 58.389969119431969.08496868.984968 65.230088 94522675.92508875.825088 58.389969119431969.08496868.984968 65.230088 94522675.92508875.82508

34、8 58.389969119431969.08496868.984968 comparator, and locked. The division ratio data comes from the control unit. The output signal from the VCO (Q409) passes through a buffer amplifier (Q415), is amplified by Q421, and passes through a low-pass filter. The impedance is converted by an attenuator an

35、d the signal is output as HF LO2. When the HF and or 50MHz band is not operating, Q403 is turned OFF with the LO2SEL signal and HF LO2 VCO (Q409) stops operation. Table 1Main HF and 50MHz band frequency configuration CIRCUIT DESCRIPTION 5 TS-2000/X 144MHz LO1 When the VHF band is operating in the ma

36、in band, the VHF REF VCO (Q441) generates 36.057 to 37.288MHz (K), 36.450 to 36.842MHz (E). (See Table 2, Frequency Configu- ration.) The output signal from the DDS (IC406) is input to pin 8 of the PLL IC (IC411) for VHF REF and divided into 1/16 in IC411 to produce comparison frequency f 2 of 563 t

37、o 583kHz (K), 569 to 576kHz (E). The output signal from the VCO (Q441) goes to pin 6 of IC411 and its frequency is divided into 1/64 in IC411, com- pared with the signal with comparison frequency f 2 by a phase comparator, and is locked. The VHF REF PLL output signal is fed to pin 8 of IC410 as a re

38、ference frequency, and divided into 1/30 in IC410 to pro- duce comparison frequency f 1 of 1202 to 1243kHz (K), 1215 to 1228kHz (E). The VHF LO1 VCO (Q433) generates 183.895 to 193.895 MHz (K), 185.795 to 187.895MHz (E) in receive mode and 183.795 to 193.795MHz (K), 185.795 to 187.795MHz (E). The VC

39、O (Q433) output signal goes to pin 6 of IC410, and its frequency is divided into 1/N1 in IC410 and compared with comparison frequency f 1 by a phase comparator. The frequency is locked and LO1 is generated. The DDS (IC406) sweeps output frequency (9.014 to Display frequencyLO1 OUTIC410 :VHF REFIC411

40、 :DDS output (MHz) fRX (MHz)(MHz)LMX2306TMX(MHz)LMX2306TMXIC406 : AD9835BRU StartStopR1N1N2R2 142.000000 (K)146.999999 (K)LO130153VHF REF6416fDDS 144.000000 (E) 146.000000 (E) = fRX + IF = (fRX + IF) *R1 = VHF REF *R2 147.000000 (K) 151.999999 (K)156 N1 N2 IF = RX : 41.895 TX : 41.795 9.321MHz (K),

41、9.112 to 9.210MHz (E) in 10Hz steps by equation fDDS STEP (Hz) = (10*R1)/(N1*4) and in 1Hz steps by equation fDDS STEP (Hz) =(1*R1)/(N1*4), the LO1 covers the frequencies of 183.895 to 193.895 MHz (K), 185.895 to 187.895MHz (E) in receive mode and 183.795 to 193.795MHz (K), 185.795 to 187.795MHz (E)

42、 in transmit mode in 10Hz or 1Hz steps. The PLL output signal is changed by the switching circuit of Q469 (receive) and Q470 (transmit) so that the output amplifier and low-pass filter correspond to VHF band trans- mission and reception. In receive mode, the signal is amplified by the broad- band am

43、plifier (IC415), and passes through a low-pass filter. The impedance is converted by an attenuator and the signal is output to the RF unit (X57-606) as the first local oscillator RXLO1. In transmit mode, the signal is amplified by the broad- band amplifier (IC416), and passes through a low-pass filt

44、er. The impedance is converted by an attenuator and the signal is output to the RF unit (X57-606) as the first local oscillator TXLO1. When the VHF is not operating, Q436 is turned OFF with a signal from the serial-parallel IC (IC404) and VHF LO1 VCO (Q433) stops operation. 430MHz LO1 When the UHF b

45、and is operating in the main band, the UHF REF VCO (Q431) generates 378.105 to 418.105MHz (K), 388.105 to 398.105MHz (E) in receive mode and 378.205 and 418.205MHz (K), 388.205 to 398.205MHz (E). (See Table 3, Frequency Configuration.) The output signal (8.328 to 8.475MHz (K), 8.344 to 8.469MHz (E)

46、from the DDS (IC407) passes through a ce- ramic filter (CF400), is input to pin 8 of the PLL IC (IC412) for UHF and divided into 1/16 in IC412 to produce comparison frequency f of 520 to 530 kHz. The output signal from the VCO (Q431) goes to pin 6 of IC412 and its frequency is divided into 1/N in IC

47、412, com- pared with comparison frequency f by a phase comparator, and is locked. The DDS (IC407) sweeps output frequency (8.328 to 8.475MHz (K), 8.344 to 8.469MHz (E) in 10Hz steps by equation fDDS STEP (Hz) = 10*R/N and in 1Hz steps by equa- tion fDDS STEP (Hz) = 1*R/N, the LO1 covers the frequencies of 378.105 to 418.105MHz (K), 388.105 to 398.105MHz (E) in receive mode and 378.205 to 418.205MHz (K), 388.205 to 398.205MHz (E) in transmit mode in 10Hz or 1Hz steps. The PLL output signal is