Kenwood TS-2000 Service Manual

ALL MODE MULTI-BAND TRANSCEIVER

TS-2000/X

SERVICE MANUAL

Phone jack (9P) (E11-0438-05)

Key top (K29-5391-02)

Cabinet (Upper) (A01-2176-01)

Knob (K29-5397-13) x 2

Knob ring (K29-5395-04)

Key top (K29-5392-12)

Front glass (B10-2608-02)

Key top (K29-5393-12)

Key top (K29-5394-12)

Knob (K29-5399-03) x 3

Knob (K29-5396-03) x 2

Foot (J02-0442-04) x 2

RF coaxial receptacle (Round) (E06-0858-15)

Foot (J02-0440-04)

Knob (K21-1104-03)

CONTENTS

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 / CIRCUIT DIAGRAMS

FILTER UNIT (X51-315X-XX) ............. 135

FINAL UNIT (X45-360X-XX) .............. 137

Knob (K29-5398-03) x 3

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

RC-2000 ................................................. 235

ARCP-2000 ............................................ 235

SPECIFICATIONS ................................... 236

TS-2000/X

CIRCUIT DESCRIPTION

Overview of the Operation

The TS-2000/X basically consists of an all-mode-receiver incorporating an IF/AF DSP for satellite communication with an independent FM/AM sub-receiver for the VHF and UHF bands.

■ 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, 144MHz, 430MHz and 1.2GHz bands (some products do not support the 1.2GHz band). The circuits 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 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 bands.

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 band 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 conversion from an analog signal to a digital signal (A/D conversion) is performed with 24 bits at high precision.

The DSP circuit for IF operates in any mode other than FM mode for both transmission and reception. FM modulation, detection and squelch processing are conventional analog processes. (The processing prior to modulation and after demodulation in FM is performed by the DSP.)

In the mode in which the IF DSP circuit operates, it carries out modulation and demodulation, digital IF filtering, digital AGC, and CW waveform processing during transmission, as in the TS-870. All these functions are operated in all the bands on the main band side, including satellite operation.

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.

■ Overview 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 is sending a signal. (Except when reception is impossible due to harmonics of the transmit frequency 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 dedicated antenna for sub-band reception.

Transmission can be performed with the sub receive frequency by shifting the “PTT band” to the sub-band side. It is made possible by internally using the transmission function on the main band side.

AF processing is also carried out by the DSP on the subband 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 FM mode and quadruple conversion in non-FM modes during reception. The fourth 12kHz IF signal is converted from analog to digital and connected to the DSP.

When the carrier point frequency of the signal input from the antenna is f when demodulating this signal is expressed by the following equations:

HF MAIN f

VHF MAIN f

UHF MAIN f

1.2G MAIN f

IN, the relationship between these signals

IN = fLO1 – fLO2 – fLO3 + fLO4 – 12kHz IN = fLO1 – fLO2 – fLO3 + fLO4 – 12kHz IN = fLO1 + fLO2 + fLO3 – fLO4 + 12kHz IN = fLO1 x 2 + fLO2 + fLO3 – fLO4 + 12kHz

Reference Signal Generation Circuit

The 15.6MHz reference frequency fstd for PLL frequency control is generated by the TCXO (X400). The signal passes through a buffer amplifier (Q420) and is used as the reference signal for the second local oscillator (HFLO2) for HF band reception and the first local oscillator (SLO1) subband reception.

The reference signal is doubled by Q412, and the resulting 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 (X57606 A/11) as LO2 for VHF and UHF bands.

CIRCUIT DESCRIPTION

HF/

50MHz

68.985MHz

TX MIX

75.825MHz

69.085MHz

RX MIX RX MIX RX MIX

75.925MHz

TX MIX

10.595MHz

10.695MHz

TX MIX

TCAR

10.583MHz

455kHz

DET

TS-2000/X

MIC input

AF output

LO1HF

75.955~

129.085MHz

UHFVHF

1.2G

LO2

58.390~

65.230MHz

TX MIX

41.795MHz

LO1TX

183.795~418.205MHz (K)

185.795~398.205MHz (E)

RX MIX RX MIX

41.895MHz

LO1RX

183.895~

418.105MHz (K)

185.895~398.105MHz (E)

SUB

RX MIX

58.525MHz

÷2

SLO1

322.95~

465.04MHz (K)

371.475~409.050MHz (E)

TX MIX TX MIX

135.395MHz

RX MIX RX MIX

135.495MHz

1.2GLO1 1104~ 1165MHz

TX MIX

IF detector

LO31

31.2MHz

Mixer

1.2GLO2

124.8MHz

11.150MHz

SLO2

58.070MHz

LO3

RCAR

467kHz

DSP

Fig. 1 Frequency configuration

HF/50MHz LO1

When the HF and or 50MHz band is operating 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 fø 2 of 487 to 513kHz.

The output signal 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 fø 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 the PLL IC (IC414) for HF LO1 as a reference frequency, and divided to produce comparison frequency fø 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 comparison frequency fø 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 f (10*R 1)/(N 1*4) and in 1Hz steps by equation f

DDS STEP (Hz) =

DDS STEP

(Hz) = (1*R 1)/(N 1*4), 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-parallel IC (IC404).

The output from the VCOs (Q459, Q460, Q464) passes through a buffer amplifier (Q462), is amplified by Q476, and passes through a low-pass filter. The impedance is converted 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 select signal (HF VCO1).

TS-2000/X

CIRCUIT DESCRIPTION

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, divided into 1/226 and 1/319 in IC401 to produce comparison frequency fø 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 fø by a phase

Display frequency LO1 OUT IC414 : HF REF IC409 : DDS output (MHz)

fRX (MHz) (MHz) LMX2306TMX (MHz) LMX2306TMX IC408 : AD9835BRU

Start Stop R1 N1 N2 R2

0.030000 1.999999 LO1 32 76 HF REF 64 16 fDDS

2.000000 5.999999 = fRX + IF 30 75

6.000000 8.999999 32 84 N1 N2

9.000000 12.999999 30 75

13.000000 16.999999 32 84

17.000000 17.999999 32 92

18.000000 21.999999 30 90

22.000000 23.999999 32 100

24.000000 24.999999 32 92

25.000000 25.999999 30 90

26.000000 29.999999 24 78

30.000000 32.999999 32 100

33.000000 36.999999 30 97

37.000000 40.999999 32 115

41.000000 44.999999 32 119

45.000000 48.999999 30 115

49.000000 51.999999 30 113

52.000000 55.999999 30 115

56.000000 60.000000 32 127

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 and 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.

(fRX + IF)

*R1

= HF REF

*R2

LO2 OUT IC401 : IF

(MHz) LMX2306TMX

N3 R3 RX TX

65.230088 945 226 75.925088 75.825088

58.389969 1194 319 69.084968 68.984968

65.230088 945 226 75.925088 75.825088

58.389969 1194 319 69.084968 68.984968

65.230088 945 226 75.925088 75.825088

58.389969 1194 319 69.084968 68.984968

65.230088 945 226 75.925088 75.825088

58.389969 1194 319 69.084968 68.984968

Table 1 Main HF and 50MHz band frequency configuration

CIRCUIT DESCRIPTION

144MHz LO1

When the VHF band is operating in the main band, the

VHF REF VCO (Q441) generates 36.057 to 37.288MHz (K),

36.450 to 36.842MHz (E). (See Table 2, Frequency Configuration.)

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 fø 2 of 563 to 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, compared with the signal with comparison frequency fø 2 by a phase comparator, and is locked.

The VHF REF PLL output signal is fed to pin 8 of IC410 as a reference frequency, and divided into 1/30 in IC410 to produce comparison frequency fø 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 VCO (Q433) output signal goes to pin 6 of IC410, and its frequency is divided into 1/N1 in IC410 and compared with comparison frequency fø 1 by a phase comparator. The frequency is locked and LO1 is generated.

The DDS (IC406) sweeps output frequency (9.014 to

TS-2000/X

9.321MHz (K), 9.112 to 9.210MHz (E)) in 10Hz steps by equation f by equation f 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) in transmit mode in 10Hz or 1Hz steps.

of Q469 (receive) and Q470 (transmit) so that the output amplifier and low-pass filter correspond to VHF band transmission and reception.

band amplifier (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.

band amplifier (IC416), 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 TXLO1.

a signal from the serial-parallel IC (IC404) and VHF LO1 VCO (Q433) stops operation.

DDS STEP (Hz) = (10*R1)/(N1*4) and in 1Hz steps

DDS STEP (Hz) =(1*R1)/(N1*4), the LO1 covers

The PLL output signal is changed by the switching circuit

In receive mode, the signal is amplified by the broad-

In transmit mode, the signal is amplified by the broad-

When the VHF is not operating, Q436 is turned OFF with

Display frequency LO1 OUT IC410 : VHF REF IC411 : DDS output (MHz)

fRX (MHz) (MHz) LMX2306TMX (MHz) LMX2306TMX IC406 : AD9835BRU

Start Stop R1 N1 N2 R2

142.000000 (K)

144.000000 (E) 146.000000 (E)

147.000000 (K) 151.999999 (K)

146.999999 (K)

LO1 30 153 VHF REF 64 16 fDDS = fRX + IF = (fRX + IF)

Table 2 Main VHF band frequency configuration

430MHz LO1

When the UHF band 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)) from the DDS (IC407) passes through a ceramic 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 fø 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 IC412, compared with comparison frequency fø 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 f tion f of 378.105 to 418.105MHz (K), 388.105 to 398.105MHz (E)

DDS STEP (Hz) = 10*R/N and in 1Hz steps by equa-

DDS STEP (Hz) = 1*R/N, the LO1 covers the frequencies

156 N1 N2

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 changed by the switching circuit

of Q471 (receive) and Q472 (transmit) so that the output amplifier and low-pass filter correspond to UHF band transmission and reception.

In receive mode, the signal is amplified by the broad-

band amplifier (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 local oscillator signal RXLO1.

In transmit mode, the signal is amplified by the broad-

band amplifier (IC416), 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 local oscillator signal TXLO1.

When the UHF is not operating, Q434 is turned OFF with

a signal from the serial-parallel IC (IC404) and UHF VCO (Q431) stops operation.

*R1

= VHF REF

IF = RX : 41.895

*R2

TX : 41.795

TS-2000/X

CIRCUIT DESCRIPTION

Display frequency LO1 OUT IC412ÅF DDS output (MHz)

fRX (MHz) (MHz) LMX2306TMX IC407 : AD9835BRU

Start Stop R N

420.000000 (K) 425.999999 (K) LO1 16 726 fDDS

425.000000 (K) 431.499999 (K) = fRX – IF 736 = fRX – IF

430.000000 (E) N

431.500000 (K,E) 435.499999 (K,E) 747

435.500000 (K,E) 439.499999 (K,E) 754

439.500000 (K,E) 443.499999 (K) 762

440.000000 (E)

443.500000 (K) 447.999999 (K) 770

448.000000 (K) 449.999999 (K) 778

Table 3 Main UHF band frequency configuration

SUB LO1

When the sub band receiver is operating, the sub VCO (Q406, Q407) generates 322.95 to 465.040MHz. (See Table 4, frequency configuration.)

The 15.6MHz reference signal fstd is input to pin 8 of the PLL IC (IC402) for the sub VCO, divided into 1/R in IC402 to produce comparison frequency fø of 5 and 6.25kHz. The division ratio data comes from the control unit.

The output signal from the VCO (Q406, Q407) goes to pin 6 of IC402, its frequency is divided into 1/N in IC402, compared with comparison frequency fø by a phase comparator, and locked.

IF = RX : 41.895

TX : 41.795

The output signal from the VCO (Q406, Q407) passes through a buffer amplifier (Q413, Q414), is amplified by the broad-band amplifier (IC405), and passes through a low-pass filter. The impedance is converted by an attenuator and the signal is output as SLO1.

When the sub band receiver is not operating, Q411 and Q411 are turned OFF with the BSW1 and BSW2 signals and sub VCO (Q406, Q407) stops operation.

Display frequency SLO1 OUT IC404 : IC402 : LMX2316TMX

fRX (MHz) (MHz) BU4094BCFV Step : 5,10,15,20,30 (kHz) Step : 6.25,12.5,25,50,100 (kHz)

13pin : Q6 12pin : Q7 11pin : Q8

Start Stop (BSW2) (BSW1)

118.00000 (K) 118.94500 (K)

118.95000 (K) 134.99500 (K)

135.00000 (K) 154.49500 (K)

144.00000 (E) 146.00000 (E)

154.50000 (K) 173.99500 (K)

220.00000 (K) 235.99500 (K)

236.00000 (K) 252.49500 (K)

252.50000 (K) 271.54500 (K)

271.55000 (K) 289.99375 (K)

290.00000 (K) 296.42000 (K)

296.42500 (K) 328.99500 (K)

329.00000 (K) 367.52000 (K)

367.52500 (K) 399.99500 (K)

400.00000 (K) 413.47000 (K)

413.47500 (K) 445.99500 (K)

430.00000 (E) 440.00000 (E)

446.00000 (K) 484.57000 (K)

484.57500 (K) 511.99500 (K)

SLO1 L H L 3120 = (fRX + 58.525) *2

SLO1 L H L = (fRX – 58.525) *2

SLO1 L H L = fRX + 58.525 H L 0.005 0.00625

SLO1 L H L = fRX – 58.525

Table 4 Sub band frequency configuration

(B LU SW)

H L 0.005 0.00625 LHH

H L 0.005 0.00625 LHH HL

LHH HL

H L 0.005

LHH HL

RNR N

Formula Formula

2 x (fRX + 58.525) 2496

N =

2 x (fRX – 58.525)

N =

fRX + 58.525

N =

fRX – 58.525

N =

2 x (fRX + 58.525)

N =

2 x (fRX – 58.525)

N =

fRX + 58.525

N =

fRX – 58.525

N =

0.00625

L52

Q20

Q19

Q312

Q16

Q13

Q313,314

39.523~

39.688MHz

Q302

Q301

1104~ 1165MHz

L340~

342

39.6 MHz

8.323~

8.488MHz

CF1,2

8.4 MHz

IC5

IC14

PLL

DDS

552.253~

582.303MHz

Q310,311

Q10

TX-RX 3 (X57-607)

D10

D11

L42,43Q15

Q14

124.8MHz

Q7,8

Q1,2

31.2MHz

Q65

LO31

31.2MHz

12LO31

X57-606

CIRCUIT DESCRIPTION

1.2GHz Unit Local Oscillator

The 12LO31 signal (31.2MHz) is quadrupled to 124.8MHz in Q14 and 15. This signal is sent to the mixers of the transmitter section (Q1 and Q2) and the mixers of the receiver section (Q7 and Q8)

In the DDS (C4) , 8.323~8.488MHz are output using 12LO31 as the reference signal. This signal passes through a filter (CF1 and CF2) and is input to the mixers for reference PLL signals (Q313 and 314).

In Q313 and Q314, the DDS output is mixed with 12LO31 (31.2MHz) and an approximately 39.6MHz signal is obtained. This signal passes through a filter and an amplifier (Q312) and becomes the reference signal of the PLL IC (IC5).

The VCO (Q301) oscillates at 552.253~582.303MHz. This signal is amplified in Q302 and goes to the PLL IC (IC5) and Q19.

The PLL IC (IC5) divides the reference signal (approximately 39.6MHz) to 1/72. The signal from Q302 is divided to 1/N (N=1006~1058).

TS-2000/X

The two signals are compared in the phase comparator within the IC and the VCO (Q301) oscillation frequency is locked.

The signal input into Q19 is doubled. This signal passes through a filter and an amplifier (Q20) and goes to the sending mixer (D1) and the receiving mixer (Q10).

Fig. 2 1.2GHz unit local oscillator

Display frequency

fRF (MHz) frequency LMX2316TMX IC4 : AD9851BRS

Start Stop fVCO (MHz) R N

1240.000000 (K) 1243.999999 (K) fVCO 72 1006 fDDS

1244.000000 (K) 1245.999999 (K) = (fRF – IF)/2 1008= (fRF – IF)*R

1246.000000 (K) 1249.999999 (K) 1011 2*N

1250.000000 (K) 1253.999999 (K) 1015

1254.000000 (K) 1255.999999 (K) 1017

1256.000000 (K) 1258.999999 (K) 1020

1259.000000 (K) 1262.999999 1023

1260.000000 (E)

1263.000000 1266.999999 1027

1267.000000 1270.999999 1030

1271.000000 1274.999999 1034

1275.000000 1277.999999 1037

1278.000000 1280.999999 1040

1281.000000 1284.999999 1043

1285.000000 1288.999999 1047

1289.000000 1292.499999 1050

1292.500000 1294.999999 1053

1295.000000 1297.999999 1056

1298.000000 1299.999999 1058

Q301 oscillation

C5 : DDS output (MHz)

– 31.2

IF=RX : 135.495

TX : 135.395

Table 5 1.2GHz band frequency configuration

Local Signals

The RXLO3 (11.15MHz) and RCAR (467kHz) for reception and TCAR (10.583MHz) for transmission are output from DDSs (RXL03 : IC603, RCAR : IC601, TCAR : IC602).

The frequencies of local oscillator output signals (LO1, LO2, RCAR, TCAR) for each band are shifted by offset (IF filter setting), RIT, XIT, IF SHIFT as listed in Tables 5 to 11.

TS-2000/X

CIRCUIT DESCRIPTION

DDS IC408 : AD9835BRU

HF TX/RX LO1 LSB USB CW CW-R

RX TX RX TX RX TX RX TX Filter offset –1.5k –1.5k +1.5k +1.5k +0.7k +0.7k –0.7k –0.7k RIT +(D RIT) – +(D RIT) – +(D RIT) – +(D RIT) – XIT – +(D XIT) – +(D XIT) – +(D XIT) – +(D XIT) SLOPE H +(SSB H) – –(SSB H) – –(CW H) – +(CW H) –

10.695MHz Filter Adj.

HF TX/RX LO1 FSK FSK-R AM FM

Filter offset –(1.5k–Fcenter) 0 +(1.5k–Fcenter) 0 0 0 0 0 RIT +(D XIT) – +(D RIT) – +(D RIT) – +(D RIT) – XIT – +(D XIT) – +(D XIT) – +(D XIT) – +(D XIT) SLOPE H +(FSK H) – –(FSK H) –––––

10.695MHz Filter Adj.

144MHz TX/RX LO1 LSB USB CW CW-R

Filter offset –1.5k –1.5k +1.5k +1.5k +0.7k +0.7k –0.7k –0.7k RIT +(D RIT) – +(D RIT) – +(D RIT) – +(D RIT) – XIT – +(D XIT) – +(D XIT) – +(D XIT) – +(D XIT) SLOPE H +(SSB H) – –(SSB H) – –(CW H) – +(CW H) –

10.695MHz Filter Adj.

144MHz TX/RX LO1 FSK FSK-R AM FM

10.695MHz Filter Adj.

+(D 10.695) – –(D 10.695) –––––

RX TX RX TX RX TX RX TX

– – – –––––

Table 6 HF band LO1 frequency shift data

DDS IC406 : AD9835BRU

RX TX RX TX RX TX RX TX

+(D 10.695) – –(D 10.695) –––––

RX TX RX TX RX TX RX TX

– – – –––––

Table 7 144MHz band LO1 frequency shift data

DDS IC407 : AD9835BRU

430MHz TX/RX LO1 LSB USB CW CW-R

10.695MHz Filter Adj.

430MHz TX/RX LO1 FSK FSK-R AM FM

10.695MHz Filter Adj.

+(D 10.695) – –(D 10.695) –––––

RX TX RX TX RX TX RX TX

– – – –––––

Table 8 430MHz band LO1 frequency shift data

TS-2000/X

CIRCUIT DESCRIPTION

DDS IC4 : AD9851BRS

1.2GHz TX/RX LO1 LSB USB CW CW-R RX TX RX TX RX TX RX TX

10.695MHz Filter Adj.

1.2GHz TX/RX LO1 FSK FSK-R AM FM

10.695MHz Filter Adj.

+(D 10.695) – –(D 10.695) – ––––

RX TX RX TX RX TX RX TX

––––––––

Table 9 1.2GHz band LO1 frequency shift data

RX LO3 DDS IC603 : AD9835BRU

LSB USB CW CW-R FSK FSK-R AM FM

BASE 11.150 (MHz)

HF SLOPE H +(SSB H) –(SSB H) –(CW H) +(CW H) +(FSK H) –(FSK H) – –

SLOPE L +(SSB L) –(SSB L) –(CW L) +(CW L) +(FSK L) –(FSK L) – –

10.695MHz Filter Adj. 455kHz Filter Adj. +(D 455) –(D 455) – – – – – –

144 SLOPE H +(SSB H) –(SSB H) –(CW H) +(CW H) +(FSK H) –(FSK H) – –

MHz SLOPE L +(SSB L) –(SSB L) –(CW L) +(CW L) +(FSK L) –(FSK L) – –

10.695MHz Filter Adj. 455kHz Filter Adj. +(D 455) –(D 455) – – – – – –

430 SLOPE H –(SSB H) +(SSB H) +(CW H) –(CW H) –(FSK H) +(FSK H) – –

MHz SLOPE L –(SSB L) +(SSB L) +(CW L) –(CW L) –(FSK L) +(FSK L) – –

10.695MHz Filter Adj. 455kHz Filter Adj. –(D 455) +(D 455) – – – – – –

1.2 SLOPE H –(SSB H) +(SSB H) +(CW H) –(CW H) –(FSK H) +(FSK H) – –

GHz SLOPE L –(SSB L) +(SSB L) +(CW L) –(CW L) –(FSK L) +(FSK L) – –

10.695MHz Filter Adj. 455kHz Filter Adj. –(D 455) +(D 455) – – – – – –

+(D 10.695) –(D 10.695) – – – – – –

–(D 10.695) +(D 10.695) – – – – – –

Table 10 RX LO3 frequency shift data

TS-2000/X

CIRCUIT DESCRIPTION

RCAR DDS IC601 : AD9835BRU

LSB USB CW CW-R FSK FSK-R AM FM

BASE 467 (kHz)

HF Filter offset +1.5k –1.5k –0.7k +0.7k +(1.5k–Fcenter) –(1.5k–Fcenter) 0 0

CW pitch – – –(PITCH) +(PITCH) – – – – FSK tone H – – – – +2.125k FSK tone L – – – – +1.275k SLOPE L +(SSB L) –(SSB L) –(CW L) +(CW L) +(FSK L) –(FSK L) – – 455kHz Filter Adj. +(D 455) –(D 455) – – – – – –

144 Filter offset +1.5k –1.5k –0.7k +0.7k +(1.5k–Fcenter) –(1.5k–Fcenter) 0 0

MHz CW pitch – – –(PITCH) +(PITCH) – – – –

FSK tone H – – – – +2.125k FSK tone L – – – – +1.275k SLOPE L +(SSB L) –(SSB L) –(CW L) +(CW L) +(FSK L) –(FSK L) – – 455kHz Filter Adj. +(D 455) –(D 455) – – – – – –

430 Filter offset –1.5k +1.5k +0.7k –0.7k –(1.5k–Fcenter) +(1.5k–Fcenter) 0 0

MHz CW pitch – – +(PITCH) –(PITCH) – – – –

FSK tone H – – – – –2.125k FSK tone L – – – – –1.275k SLOPE L –(SSB L) +(SSB L) +(CW L) –(CW L) –(FSK L) +(FSK L) – – 455kHz Filter Adj. –(D 455) +(D 455) – – – – – –

1.2 Filter offset –1.5k +1.5k +0.7k –0.7k –(1.5k–Fcenter) +(1.5k–Fcenter) 0 0

GHz CW pitch – – +(PITCH) –(PITCH) – – – –

–2.125k–FSK SHIFT –1.275k–FSK SHIFT

+2.125k+FSK SHIFT +1.275k+FSK SHIFT

–– ––

Table 11 RCAR frequency shift data

TCAR DDS IC602 : AD9835BRU

LSB USB CW CW-R FSK FSK-R AM FM

BASE 10.583 (MHz) HF Filter offset –1.5k +1.5k +0.7k –0.7k 0 0 0 0 144MHz Filter offset –1.5k +1.5k +0.7k –0.7k 0 0 0 0 430MHz Filter offset +1.5k –1.5k –0.7k +0.7k 0 0 0 0

1.2GHz Filter offset +1.5k –1.5k –0.7k +0.7k 0 0 0 0

Table 12 TCAR frequency shift data

Description of variables in Tables 6 to 12 (D RIT) RIT frequency variable amount (–9.99~+9.99kHz) (D XIT) XIT frequency variable amount (–9.99~+9.99kHz) (SSB H) SSB slope high cut frequency variable amount = 2.8k – Fhi (SSB L) SSB slope low cut frequency variable amount = Flow – 300 (CW H) CW slope high cut frequency variable amount = 2.7k – (FSK SHIFT + Fwidth / 2) (CW L) CW slope low cut frequency variable amount = FSK SHIFT – Fwidth / 2 – 100 (FSK H) FSK slope high cut frequency variable amount = 2.8k – (Fcenter + Fwidth / 2) (FSK L) FSK slope low cut frequency variable amount = Fcenter – Fwidth / 2 (D 10.695) RX 10.695MHz filter adjustment frequency variable amount (D 455) RX 455kHz filter adjustment frequency variable amount (PITCH) CW pitch frequency (400~1000Hz, Initial value 800Hz) (FSK SHIFT) FSK shift width frequency (170Hz, 200Hz, 425Hz, 850Hz, Initial value 170Hz) (Fcenter) FSK RX center frequency = (2125Hz or 1275Hz) + (FSK SHIFT / 2)

–12dB

ATT

LPF

TX-RX 1 (X57-605 A/9)

HPF BPF

1.705~2.5MHz

49.0~54.0MHz

D12

D13

BPF

D33 D34

30kHz~1.705MHz

1.705MHz~ 60MHz

D7 D8 D10

D11

RF BPF

D38

D39

D705

D704

PRE AMP

Q12

30kHz~21.5MHz

ANT1 ANT2

HF RX ANT

Q705

21.5MHz~60MHz

D35

D36

1st Mixer

Q7~Q10

XF1

69.085MHz

XF2

75.925MHz

X51-315

FILTER

X57-605

TX-RX1

Q18

2nd Mixer

Q19,Q20

D42 D41

10.695 MHz

Q13

LO1HF

75.955~

129.085MHz

CIRCUIT DESCRIPTION

TS-2000/X

HF Receiver System and Main IF System

Three antenna terminals used for the HF and 50MHz

band reception are ANT1, ANT2 and HF RX ANT.

After the incoming signal from ANT1 and ANT2 passes through the transmission/reception changeover relay in the filter unit (X51-315), and is sent to the HFRX terminal of the TX-RX unit (X57-605). There is an HF RX ANT terminal there, and one of the antennas can be selected from the menu for reception .

The HF RX ANT terminal is used to connect a dedicated HF-band low-band receiving antenna, such as a Beverage antenna, and operates at frequencies up to 30MHz. (If an antenna, such as a solid wire antenna, is connected to this terminal, unwanted radio signals in the shack may be picked up. It is recommended that a 50 (coaxial cable be used for routing in the shack.)

The signal passes through an RF ATT, an image filter and a limiter for surge absorption and enters the RF BPF for both transmission and reception. The division of the RF BPF is in the range shown in the block diagram. For 6.9~7.5MHz,

13.9~14.5MHz and 49~54MHz, a dedicated BPF (adjustable type) is used and particularly effective for eliminating unwanted signals in the low band. Other BPFs (non-adjustable type) are designed as circuits with independent armature bands, except that the 24MHz and 28MHz bands are shared. Signals pass through these BPFs at the time of transmission, so they are useful for producing radio signals with little radiation.

Although the conventional RF ATT had an attenuation level of 20dB, the attenuation level of the current RF ATT is 12dB. It can, however, be changed to approximately 20dB by removing the jumper (CN2) near the ATT within the unit.

The pre-amplifier (Q12, Q705) have been changed to a power MOS FET from the combination of the conventional cascade amplifier and MOS FET amplifier. This element is a FET that is used in a younger stage for transmission and has

excellent large input characteristics. The actual circuit contains two amplifiers using this FET. Large input characteristics with a low gain are given priority on the low band (Q12) with respect to 21.5MHz, and sensitivity is given priority on the high band (Q705). circuit on the low band side bordering

21.5 MHz favoring a gain with moderately large input characteristics and that on the hybrid side (Q705) favoring . When the pre-amplifier is off, the signal from the RF BPF enters the receiving first mixer (Q7~Q10) in the next stage as it is.

The receiving first mixer circuit uses a double balance type mixer with four joint type FETs. The signal is converted to the first IF frequency by the first local oscillator signal. The TS-2000S has adopted a method that changes the first IF frequency according to the receive frequency. For this reason, it has two sets of roofing filters (MCF) that determine the selectivity of the first IF. Table 1 shows the relationship between the receive frequency and the first IF frequency. The central frequencies for the reception and transmission of the first IF frequency are different from each other by 100kHz because the transmission and reception is performed simultaneously during satellite communication.

RX/TX frequency (MHz)

0.03~ 9.0 75.925 75.825

9.0 ~17.0 69.085 68.985

17.0 ~24.0 75.925 75.825

24.0 ~26.0 69.085 68.985

26.0 ~30.0 75.925 75.825

30.0 ~37.0 69.085 68.985

37.0 ~49.0 75.925 75.825

49.0 ~60.0 69.085 68.985

RX 1st IF (MHz) TX 1st IF (MHz)

Table 13 RX frequency and 1st IF frequency

Fig. 3

TS-2000/X

CIRCUIT DESCRIPTION

The signal is then amplified by the first IF amplifier (Q18) and is converted to the second IF frequency of 10.695MHz in the second receive mixers (Q19, 20). The tuning frequency of each stage, the second local oscillator frequency and others are changed according to the receive frequency to respond to the changeover of the previously stated first IF frequency.

A circuit for changing over the IF signal from the units of the VHF, UHF and 1.2GHz bands and IF signal from the HF band is provided on the output side of the second receive mixer. That is, the circuits following this stage are commonly used circuits, regardless of the receive frequency on the main side.

In addition, there is a semi-fixed volume (VR4) on the output side of the first receive mixer. The volume is used to eliminate the gain differential generated due to the changeover of the first IF frequency.

The signal for the noise blanker is extracted from this point by passing through Q22. The noise blanker circuit is based on the same principle of operation as the conventional one, but can change the threshold level by changing the emitter potential of the noise detection stage (Q29).

The 10.695MHz signal is amplified by Q26 which also serves as a noise blanker gate circuit and passes through a

10.695MHz IF filter. It has three bandwidths, 2.7kHz, 6kHz and through, and when it is combined with the 455kHz filter group, the same continuous band change function (analog IF throughput: operation in modes other than FM) as in con-

ventional analog devices is implemented. The band in this analog stage does not affect the operation of the digital IF filter in the IF DSP and is automatically set to the optimum band for removing unwanted signals outside the band.

Then, the signal is converted to the third IF frequency of 455kHz in the third receive mixer (Q700, 701). The 455kHz filter has three bandwidths: 2.7kHz, 9kHz and 15kHz. In FM mode (main band side) the 15kHz filter is selected for WIDE and the 9kHz filter is selected for NARROW, and signals passing through the filter are sent to the FM IC (ICI), amplified and detected. IC1 processes squelch, S meter, etc.

As a characteristic operation in this stage, a tuning error detection voltage for the ALT function operating in the

1.2GHz band FM mode is generated. It utilizes the DC voltage that is overlapped with the ICI detection output.

In a mode other than FM, the receive signal is amplified by the next third IF amplifier (Q38) and operational amplifier (IC18) and converted to the final 12kHz IF frequency by the fourth receive mixer (IC3). The converted IF signal in FM (audio signal) and non-FM mode (IF signal) is selected by the multiplexer (IC7) and the signal is sent to the DSP of the control unit for processing. The signals processed in the control unit become audio signals in all modes and return to the TX-RX1 unit (X57-605). These audio signals are power amplified to the level that drives the speaker with the AM amplifier (IC9).

A speaker separation function is available as an accessory circuit. The bands can be changed as shown in Table

14.

Q18

65.230MHz

58.390MHz

ALT

2nd Mixer

Q19,20

10.695 MHz

LO2

IC2

X57-606

D46

RIF

FM IC

DET

IC1

455kHz

D68

CF4

D47

X57-607

12RIF

Q709

Noise blanker

Q22 Q26 Q28

Q38

IC18

4th Mixer

IC3

Q41

Fig. 4

Q25

Q29~Q31

CF1

D69 D67

CF2

D71 D70

CF3

12kHz

Q42

RCAR

467kHz

10.695MHz

D60,64 D52,56

XF5

D49,55 D57,61

XF6

D58,62D50,53

3rd Mixer

Q700,701

LO3

11.15MHz

DSP

X53-391

TX-RX 1 (X57-605 A/9)

AF PA AMP

IC9

Q32

TS-2000/X

CIRCUIT DESCRIPTION

■ Speaker output changeover

When external speakers 1 and 2 and headphones are

connected, you can change over the sub/main band outputs.

The headphone connection is preferred over the all the speaker output and you can select from three patterns for headphone left-right changeover.

Connection Conditions (● : connected) Output condition by connection of left table

Headphone SP1 SP2 Headphone Built-in speaker SP1 SP2

● XX→ Pattern 0~2 Stop X X

●●X → Pattern 0~2 Stop Stop X

●●●→ Pattern 0~2 Stop Stop Stop

● X ● → Pattern 0~2 Stop X Stop

X ●●→ X Stop Pattern 0~2 (Left) Pattern 0~2 (Right) XX● → X Pattern 0~2 (Left) X Pattern 0~2 (Right) X ● X → X Stop Main-sub full mix X XXX→ X Main-sub full mix X X

When SP1 only has been connected, the built-in speaker

will change over to SP1.

When SP1 and SP2 are connected, you can select the SP1 and SP2 output method from three patterns, the same as for the headphones.

Left-right output patterns

In case of headphones In case of SP1 & SP2 Selected Pattern Left side Right side SP1 or Built-in SP2 Pattern 0 Main-sub full mox Main-sub full mix Main-sub full mix Main-sub full mix Pattern 1 Main : Full sound Main : 1/4 sound main : Full sound Main : 1/4 sound

Sub : 1/4 sound Sub : Full sound Sub : 1/4 sound Sub : Full sound

Pattern 2 Main Sub main Sub

This is a reverse function and left-right changeover is possible.

Table 14

Main VHF/UHF Band Front-End and

Sub Receiver System

The VHF and UHF band receiver circuit is configured with two systems, a main band (FM/ AM/ SSB/ CW/ FSK) and a sub-band (FM/AM), each of which has a VHF and a UHF band path.

In the main band, the first IF is 41.895MHz and the second IF is 10.695MHz and the signal lower hetero to the second IF is sent to the TX-RX1 unit (X57-605) and linked to the second IF, which is shared by the other bands. The subband is a double conversion where the first IF is 58.525MHz and the second IF is 455kHz. It is configured so that detected AF signals are sent to the control unit (X53-391).

■ VHF/ UHF band front end

The circuit operation of the sub-receiver unit differs depending on whether it is for K destination or others. The circuit operation for each of the destinations is described below.

• K destination

The incoming signal from the VHF band antenna terminal passes through the TX/RX changeover relay (K2) in the filter unit (X51-315) and goes to the TX-RX2 unit (X57-606). Then, it passes through the 12dB ATT circuit and is divided to the 136~155MHz path and the 118~136MHz, 155~174MHz and 220~300MHz path by the L distribution circuit. The 136~155MHz signal passes through a 2-pole BPF (bandpass filter) and enters the pre-amplifier (Q15). The amplified receive signal is again distributed to the paths for the main and sub receiver units by the L distribution circuit.

The signal distributed to the main receiver unit passes through the 2-pole variable tuning BPF, is amplified by the second amplifier (Q24) and goes to the mixer (IC4) for the main band common to the VHF and UHF bands through the variable tuning BPF. The 2-pole x 2-stage BPF for the main band VHF controls the tuning frequency by output from the D/A of the TX-RX1 unit (X57-605).

TS-2000/X

CIRCUIT DESCRIPTION

The 118~174MHz signal distributed to the sub-receiver unit passes through a variable tuning filter and is amplified by the second amplifier (Q24). Then, it passes through the 2-pole variable tuning BPF, and the 220~300 MHz signal is amplified by Q23 and is then input into the mixer (IC5) for the sub-band common to the VHF and UHF bands. The 1pole and 2-pole BPFs for the sub-band VHF also controls the tuning frequency by the output from the D/A of the TX-RX1 unit (X57-605).

The incoming signal from the UHF band antenna terminal enters the UHF section of the final unit (X45-360), passes through the HPF and LPF and goes to the TX-RX2 unit (X57-

605). Then, it passes through the 12dB ATT circuit and goes to the pre-amplifier (Q14). The amplified receive signal is distributed to the paths of the main and sub-receiver sections by the L distribution circuit.

The signal distributed to the main receiver section passes through the 3-pole variable tuning BPF and is amplified by the second amplifier (Q21). Then, it passes through the 3-pole variable tuning BPF and is input into the mixer (IC4) for the main band.

This 3-pole x 2 stage BPF for the UHF also controls the tuning frequency by the output from the D/A of the TX-RX1 unit (X57-605).

Filter X51-315

VHF

The 438~450MHz signal distributed to the sub-receiver section passes through the SAW filter (L29), is amplified by the second amplifier (Q25), and passes through another SAW filter (L50). The 300~438MHz and 450~512MHz signals are amplified by Q19 and goes to the mixer (IC5) for the sub-band.

• E, E2 destinations

Then, the signal passes through the 12dB ATT circuit and the 2-pole BPF (band-pass filter) and enters the pre-amplifier (Q15). The amplified receive signal is distributed to the paths of the main and sub receiver sections by the L distribution circuit.

The signal distributed to the sub-receiver section passes through a variable tuning filter and is amplified by the second amplifier (Q22). Then, it passes through the 2-pole tuning BPF, and goes to the mixer (IC5) for the sub-band common to the VHF and UHF bands. The 1-pole + 2-pole BPFs for the sub-band VHF also control the tuning frequency by the output from the D/A of the TX-RX1 unit (X57-605).

The signal distributed to the sub-receiver section passes through the SAW filter (L29), is amplified in the second amplifier (Q25), passes through another SAW filter (L50) and goes to the mixer (IC5) for the sub-band.

ATT

–12dB

Final X45-360

UHF

D10

ATT

–12dB

TX-RX 2 (X57-606 A/11)

Filter X51-315

VHF

Final X45-360

UHF

Q15 Q24

L23,24 L47,55

D24 D48D22

LO1RX

183.895~

418.105MHz

D23Q14

L108~111,137

Q30

Q21

L116~119,133

IC4

D49

Fig. 5 Main band receiver section

D24

ATT

–12dB

D10

D95

D101

D96

D97 D90

L28

L29

XF1

41.895MHz

31.200MHz

L44,52

Q38

Q44

LO31

L50

Q42,43

D46D22Q15 Q22

D82Q23

D91Q25

Q61

D46

Q22

X57-605

RIF

ATT

–12dB

TX-RX 2 (X57-606 A/11)

D20Q14

D92 D81

D23

Fig. 6 Sub band receiver section

D94D93Q19

IC5

CIRCUIT DESCRIPTION

TS-2000/X

■ Main receiver IF section

The signal input to IC4 is mixed with the signal produced by amplifying the first local oscillator RXLO1 from the PLL section by Q30 and lower hetero to the first IF of

41.895MHz. Then, it passes through the MCF (XF1) and AGC amplifier (Q38) and goes to the second mixer (Q42 and

43). The signal input to the second mixer is mixed with the signal produced by amplifying the second local oscillator

21.2MHz from the PLL section by Q44 and lower hetero to the second IF of 19.695MHz. The signal then passes through a temperature compensating resistor and the IF amplifier (Q61) and is sent to the TX-RX1 unit (X57-605).

■ Sub receiver IF section

The signal input to IC5 is lower hetero to the first IF of

58.525MHz. In the VHF band, the local oscillator SLO1 from the PLL section is divided into two by the divider (IC6) and passes through amplifier (Q23). In the UHF band, the IF signal passes through amplifier (Q33) and is input to IC5. The IF signal passes through the MCF (XF2), passes through the post amplifier (AGC amplifier in the AM mode) Q37 and goes to the FM IC (IC7). The local oscillator is supplied to IC7 by the 58.07MHz crystal oscillator (X1) and is lower hetero to the second IF of 455kHz by a mixer in the IC.

The circuit operation when the signal passes through a ceramic filter after lower hetero is different for K destination and E destination. The circuit operation for each of the destinations is explained below.

• K destination

In FM mode, the signal passes through a ceramic filter (CF1), is quadrature-detected, and the resulting signal is output.

• E, E2 destinations

The signal passes through a ceramic filter (CF1) in FM WIDE mode and it passes through a ceramic filter (CF2) in FM NARROW mode. The signal is then quadrature-detected and the resulting signal is output.

In AM mode, a 455kHz signal passes through the AGC amplifier (Q51) and amplifier (Q48 and Q45) and is detected by D58. The detection signal retrieved for the AGC is rectified, passes through the DC amplifier (Q39) for AGC control and goes to the Q37 gate terminal (G2).

The FM/AM detection signal is switched by the multiplexer (IC8). Then, it is amplified by the operational amplifier (IC9) and output to the control unit (X53-391).

■ Squelch voltage and S-meter voltage of the sub

receiver section

The S meter voltage is introduced to the A/D through a LPF for RSSI output of the FM IC (IC7).

The squelch voltage is supplied to the A/D by passing the detection output of the FM IC through a filter amplifier in the FM IC, amplifying it with the noise amplifier (Q63), and rectifying it with D83.

VHF

Q30

IC4

LO1RX

UHF

TX-RX 2 (X57-6060 A/11)

IC5

58.525MHz

176.5~

231.5MHz

348.5~

458.5MHz

Q37

XF2

D53 D56Q32

XF1

41.895MHz

Q38

LO31

31.2MHz

455kHz

CF2 (E type only)

CF1

FM IC

IC7

Q51 Q48 Q45

58.07 MHz

AGC

IC6

1/2

Q33

Q42,43

Q44

Fig. 7

Q39

VHF

UHF

Q61

RIF

10.695 MHz

X57-605

S-meter

Q63

D83

D58

SLO1

322.95~

465.04MHz

TX-RX 2 (X57-606 A/11)

D46

IC6

Q22

D49

1.2GHz

IC9

DSP

X53-391

Fig. 8

TS-2000/X

CIRCUIT DESCRIPTION

Ref No. XF1 XF2 XF3 CF1 CF2 Parts No. L71-0566-05 L71-0565-05 L71-0582-05 L72-0984-05 L72-0986-05 Nominal center frequency Pass bandwidth 3dB : ±7.5kHz 3dB : ±7.5kHz 3dB : ±15kHz

Ripple 1.0dB or less 1.0dB or less 1.0dB or less 2.0dB or less 2.0dB or less Insertion loss 3.0dB or less 3.5dB or less 1.5dB or less 6.0dB or less 6.0dB or less Guaranteed attenuation

Cener – – – 455kHz±1.0kHz 455kHz±1.0kHz Terminating impedance

Spurious Fo±1.0MHz Fo±1.0MHz – – –

CF2 : Only E destination

41.895MHz 58.525MHz 41.795MHz 455kHz 455kHz

6dB : ±7.5kHz or more 6dB : ±4.5kHz or more 50dB : ±15kHz or less 50dB : ±10kHz or less

Fo+(500~1000)kHz Fo±1MHz Fo–(500~1000)kHz Fo±100kHz Fo±100kHz Fo–(200~1000)kHz 80dB or more 50dB or more 35dB or more 35dB or more

70dB or more

960Ω//1.0pF 350Ω//4.0pF 960Ω//1.0pF 1.5kΩ 2.0kΩ

CC=7.0pF CC=15.5pF

40dB or more 40dB or more

Table 15 Filters rating (TX-RX 2 unit : X57-606)

1.2GHz Unit Receiver Section

The incoming signal from the antenna (12ANT) passes through a filter, is amplified in the receiver RF amplifier (Q11 and 12) and input to the first mixer (Q10).

The signal is converted to the first IF (135.495MHz) in Q10, passes through the MCF (XF1) and the AGC amplifier (Q9) and enters the second mixer (Q7 and Q8).

The signal is converted to the second IF (10.695MHz) in Q7 and Q8, amplified in the receiver IF amplifier (Q303) and sent to the TX-RX1 unit (X57-605).

12ANT

1st Mixer

CN12

CN11

D11

Q10

TX/RX SW

XF1

135.495 MHz

1104~ 1165MHz

D6,7,303

AGC

Q12 Q11

2nd Mixer

Q7,8

Q15

124.800 MHz

Fig. 9

L33 L30

1240~ 1300MHz

Q303

10.695

12RIF

MHz

TX-RX 3 (X57-607)

X57-605

D47

HFLO1

75.955~

129.085MHz

D40

Q44,45

1.8~54MHz

HFLO2

58.390MHz

65.230MHz

D45

Q46,47

L96,98~100

68.985MHz

75.825MHz

HBPF

D76~79

L102

HBPF

D703,715

TX-RX2 X57-606

TX-RX3

X57-607

D80

D81

10.595 MHz

Q48

TX-RX 1 (X57-605 A/9)

Q49 Q711

D82 D84 RF BPF

TIF 12TIF

CIRCUIT DESCRIPTION

TS-2000/X

Transmit System IF Section

■ Transmission IF

The details of the processing by the DSP depend on the

mode.

• Modes other than FM

Transmission bandwidth change, speech processor and microphone gain control are performed in the AF stage. A 12kHz IF signal is produced after PSN modulation and output modulation control.

• FM mode

The baseband processing in the AF stage is carried out by the DSP and a VCXO (voltage controlled X’tal Oscillator) is used as a modulator.

The transmit signal output from the control unit (X53-391) is switched by an analog SW (IC8) and is input to the balanced mixer (IC6). The 12kHz IF signal and local oscillator signal enters the IC6 and become a 10.595MHz signal. The local oscillator signal is generated by the DDS (IC602).

The 10.595MHz IF component is amplified by the IF amplifier (Q54) and passes through the 6kHz bandwidth crystal filter, then becomes a 10.595MHz IF signal by eliminating local oscillator signals. The diode switch (D90) changes between FM modulator output and non-FM 10.595MHz IF signals.

The temperature compensation of the transmitter circuit is done by the thermistor near the IF amplifier (Q54) and the thermistor on the input side of the IF amplifier (Q711). They reduce the gain at low temperatures and raise it at high temperatures.

Q711

D84

TH5

TX-RX 1 (X57-605 A/9)

D90

Q58

XF9

10.595MHz

Q59

10.595MHz

Q54

TH7

TH8

IC6

Q604

SSB,CW, AM,FSKFM2

IC602

DDS

10.595MHz

IC8

X53-391

O/I 3

O/I 2

O/I 1

TX signal

The output signal from the IF amplifier (Q711) passes through D84, Q40, D82, D48, D80 and D81 and becomes the IF transmit signal for each band. D84 is a voltage controlled attenuator circuit. This circuit changes the attenuation level according to the control voltage (TGC), in the same way as the TGC (TX gain control) used in the TS-870 and TS570 and is set to the adjusted attenuation level for each band. Q49 is an IF amplifier circuit with an ALC circuit. The gain is controlled by the voltage generated by the ALC circuit.

D82 is a voltage controlled attenuator circuit as D84. The attenuation level is minimum at full power and as the power decreases, the control voltage rises and the attenuation level increases. When the power is reduced, the gain will become relatively excessive if the IF gain is not lowered. It is set to an attenuation level adjusted by the PGC (Power Gain Control) accordance to the power of each band.

Q48 is an IF output buffer. It changes to the transmitter section of each band with a diode switch (D80, D81) to supply a 10.595MHz IF signal.

During transmission in the 144MHz and 420MHz bands, the signal is output to the TX-RX2 unit (X57-605), and during transmission in the 1.2GHz band, it is output to the TX-RX3 unit (X57-605).

In the 1.8~54MHz band, the frequency is converted to the final target transmit frequency in the TX-RX1 unit (X57-

605).

The local oscillator frequency changes according to the band in second transmit mixer of Q46 and 47 to generate different IF frequencies. (TX third IF: 68.985MHz or 75.825 MHz)

D703 and D715 are used to change the tuning frequency of the local oscillator signal and D79, D78, D77 and D76 are used change the frequency of the IF filter (L102).

The variable tuning filter containing these variable capacitance diodes performs the coarse adjustment of the coil (L100, L99, L98, L96, L102) in the band (18.085MHz) where the IF is 75.825MHz. Then, it changes the tuning frequency control voltage from the D/A in the band (14.100MHz) where the IF is 68.985MHz and tunes it to the necessary frequency by readjusting the coil.

Fig. 10

Fig. 11

TS-2000/X

CIRCUIT DESCRIPTION

The third IF signal is input to the third transmit mixer

(Q44, 45).

A GaAs FET is used to obtain the satisfactory intermodulation characteristics. VR3 adjusts the second gate voltage to maximize the gain. VR2 adjusts the balance of the source current of two FETs and prevents the generation of spurious components by minimizing IF output leakage. It also adjusts the leakage of the IF signal (68.985MHz) to the minimum during 50MHz band transmission.

The signal with the target frequency passes through the BPF shared by the receiver section to eliminate spurious components. The transmitter circuit is separated from the receiver circuit to implement satellite communication, but only this BPF is shared to prevent generation of spurious components.

Finally, the signal is amplified to a sufficient level (approximately 0dBm) by the broadband amplifier and supplied to the final section. Q43 is a power MOS FET and provides an output of approximately 20dBm when the ALC is inactive.

RF HPF

HFTX

Q43

1.705~2.5MHz

BPF

2.5~4.1MHz

BPF

4.1~6.9MHz

BPF

6.9~7.5MHz

BPF

7.5~10.5MHz

BPF

10.5~13.9MHz

BPF

13.9~14.5MHz

BPF

14.5~21.5MHz

BPF

21.5~30.0MHz

BPF

30~49, 54~60MHz

BPF

49~54MHz

BPF

D26

Q44

L95

VR2

Q45

TX-RX 1 (X57-605 A/9)

L96

D76

L97

VR3

Fig. 12

L98~100

HBPF

■ ALC

The progressive and reflected wave signals detected by

the final section in each band enters the TX-RX1 unit (X57-

605) and is synthesized by a diode. It is synthesized simply because no signal is transmitted in multiple bands at the same time.

When the progressive signal voltage is input, it is divided by a resistor, and enters the differential amplifier composed of Q73 and Q74. When the voltage increases, the emitter voltage rises, the base current of Q74 decreases, and the collector voltage of Q74 also rises. When the voltage exceeds the base emitter voltage plus the emitter voltage (approximately 2.4V) of Q76, the base current of Q76 begins to flow and the voltage of the collector to which the ALC time constant CR is connected decreases. This collector voltage is buffered by Q78, the voltage is shifted by D108, and matched with the keying control voltage by Q79 and D111 to produce the ALC voltage. When the ALC voltage (2.7V when inactive) decreases, the second gate voltage of the IF amplifier (Q49) decreases and the gain lowers.

During AM transmission, Q75 turns on approximately 20ms after transmission, and the ALC voltage is controlled by the average power. The voltage output from the DAC (IC14) is applied to the base voltage of Q74, which is the reference voltage of the ALC. This DAC (IC14) is controlled by the adjustment value (POC) from the main microcomputer. In addition, the input voltage of the DAC fluctuates according to the power supply voltage and the output drops when the voltage is reduced.

■ SWR protection

The reflected wave detection signal is divided by the DAC (IC14) and input to the base of Q77. When this voltage increase, the collector current of Q77 increases and output power is limited.

■ Meter voltage

The progressive wave voltage is calculated as the power meter voltage, the reflected wave voltage is calculated as the progressive wave voltage and its value is input as the SWR meter voltage, and the ALC voltage is input as the ALC meter voltage. These voltages are input into the A/D converter of the main microcomputer.

■ Packet signal

The control unit contains a TNC and a changeover switch circuit that enables data signals to input from the ACC2 connector. (See the block diagram)

The 1200bps signal is processed by the DSP in the same way as for audio signals, but the 9600bps signal is input directly to the FM modulator without passing through the DSP.

Q73 Q74

L119

VSF

43VSF

12VSF

Q75

HF ALC

X45-360 (A/2)

X45-360 (B/2)

X57-607

IC17 (Q6),

R509

REMOTE

(6 pin)

D123

D119

D121

TX-RX 1 (X57-605 A/9)

CIRCUIT DESCRIPTION

Q79

IC13 (AOUT)

D109

D110

Q48

D111

R439, ALC meter

D82 D84

D85

14S

Q76

D105

Q77

Q78

D108

D107D106

50ALC 14ALC 43ALC 12ALC

J7 EXT. CONT

Fig. 13

Q49

D113

X45-360 (A/2)

X45-360 (B/2)

X57-607

TS-2000/X

Q711

10.595MHz

IC14

VOUT4

D114

D124

D120

D122

VIN4

VSR

VIN1

VSR

43VSR

12VSR

VOUT1

VHF/UHF Band Transmitter Circuit (RF~IF)

The TIF (10.595MHz) signal input from the TX-RX1 unit

(X57-605) first enters the mixers (Q46 and 47). The

31.2MHz signal from the PLL passes through the RF amplifier (Q50), enters the mixer as a local oscillator to output the

41.795MHz IF through both the signals. It passes through the 41.795MHz MCF (XF3) and enters the wideband diode mixer (D54) in the next stage, and upper hetero to a VHF/ UHF band output signal. The local oscillator TXLO1 of the mixer is on a common line for both VHF and UHF band local oscillators, and the local oscillator signal is amplified by the VHF and UHF band broadband amplifier (Q34) and supplied to the mixer.

The signal converted to the VHF/UHF band is divided into a VHF band path and a UHF band path after it is output from the mixer.

X45-360

VHF

IC3

UHF

(A/2)

(B/2)

TX-RX 2 (X57-606 A/11)

D21

L128,129

D19

D33,100

L48,158

Q20Q18

FILTER

L121~124,140

Q26

D42,47,51

VHF

UHF

Q17

Fig. 14

The VHF band signal passes through a filter and a trap and is amplified in the 2-stage RF amplifiers (Q20, Q18), and the resulting signal goes to the wideband amplifier (IC3) common to the VHF and UHF bands.

The UHF band signal is amplified by the RF amplifier (Q17), passes through a 3-pole variable tuning BPF and is amplified by the amplifier (Q26). Then, it passes through a 2-pole variable tuning BPF and enters IC3. The total 5-pole variable tuning BPF controls the tuning frequency according to the control signal output from the D/A converter of the TX-RX1 unit (X57-605).

The signal amplified by IC3 is again divided into VHF band and UHF band paths by a diode switch and output to the final unit (VHF band: X45-360 A/2, UHF band: X45-360 B/2).

D54D52

Q34

TXLO1

418.205MHz

XF3

41.795 MHz

Q50

31.2MHz

Q46,47

LO31

TBPF

X57-605

TIF

10.595 MHz

DAC IC5

TS-2000/X

CIRCUIT DESCRIPTION

Transmitter Final Amplifier

The final unit (X45-360 A/2) is composed of an HF and VHF band final amplifier, an antenna turner matching circuit, and a power supply circuit.

The LPF section and antenna tuner detection circuit are located in the filter unit (X51-315).

The 1.8~144MHz band is amplified by the final unit, but it operates in the broadband up to the drive amplifier. The final unit amplifies signals using independent amplifiers in the 8~50MHz and 144MHz bands. The amplifiers are switched with a diode switch (D1).

■ Q1 : First stage amplifier

This amplifier uses a FET. It has frequency characteristics so that the gain increases in the 144MHz band.

■ Q2 : Pre-drive amplifier

This amplifier uses a bi-polar transistor. It has unique frequency characteristics.

■ Q3 and 4 : Drive amplifier

This is a push-pull type amplifier. It amplifies a signal with a broadband up to the 144MHz band, then the signal is branched to the HF and 144MHz bands through a relay.

■ Q6 and 7 : HF final amplifier

This amplifier uses a bipolar transistor with push-pull. It amplifies a signal up to the 54MHz band, using an output transformer with a coaxial cable. It outputs the signal to the LPF section through an effective and light matching circuit in the 50MHz band.

■ Q101 and 102: 144MHz final amplifier

A 144MHz band signal passes through the HPF and en-

ters the branch circuit with two amplifiers.

It functions as a parallel amplifier that branches the signal with the same phase, amplifies it with the Q101 and 102 amplifiers and re-synthesizes it. As a result a 100W output is produced.

Since the output matching section is an LPF type, it attenuates harmonics as well. After the output has been synthesized, it detects the power of the progressive wave and reflected wave with a directional coupler according to the strip line, and outputs it to the LPF section.

■ LPF section

In the 1.8~50MHz band, the signal passes through the LPF as shown in Table 3.

It has an independent LPF circuit and an antenna changeover circuit for the 144MHz band.

The signal output from the LPF passes through the detection circuits, the transmission/reception changeover relay (K1), the antenna tuner changeover relay (K3) and the antenna changeover relay (K4) and is output to ANT1 or ANT2.

Select signal Frequency

2M 1.8~ 2.0 4M 2.0~ 4.1

7M 4.1~ 7.5 14M 7.5~14.5 21M 14.5~21.5 28M 21.5~30.0 50M 49.0~54.0

X51-315

144ANT

LPF section

Q101,102

VSRVSF

HPFLPF DET

144MHz

Q6,7

Fig. 15

Q3,4 Q2 Q1

Final (X45-360 A/2)

X57-605 HFTX

X57-606 14TX

DET

VSF

VSR

430ANT X57-606

(43RX)

Q905

Final (X45-360 B/2)

Q903 Q902 Q901

X57-606

CIRCUIT DESCRIPTION

■

Progressive wave and reflected wave output circuits

The signal is detected by L7, D3 and D4. A voltage output corresponding to the progressive wave and reflected wave is produced by synthesizing the magnetically combined component by L7 with the corrected electrostatically combined component by TC1 and C9 and detecting the resulting signal.

It is adjusted by TC1 so that the reflected wave voltage under a 50Ω load is minimized. VR1 adjusts the frequency characteristics in the 50MHz band.

These outputs are synthesized with detected output of the 144MHz band and are fed to the TX-RX1 unit (X57-605).

■ Antenna turner detection circuit

The passing current is converted to voltage by L9, and the voltage is stepped down and detected by L10. One of these components is buffered by Q1 and Q2 and rectified by Q3 and Q4, are input to the phase comparator (IC2) . The IC determines the IC2 Q output “H” or “L” according to the phase difference with a D-flip-flop. The other component is detected by diodes (D10 and D11) and the amplitude difference is compared with the comparator (IC1).

The capacitor capacitance on the input side is changed according to the phase difference detection output, and the capacitor capacitance on the output side is changed according to the amplitude difference detection output.

■ UHF final unit (X45-360 B/2)

The 430MHz band transmit signal output from the TXRX2 unit (X57-606) is amplified to 50W by four amplifiers (Q901, 902, 903 and 905). The final unit consists of single amplifiers Q901, 902, 903 and 905. The input and output of the final stage is composed of micro-strip lines. The progressive wave and reflected wave detection circuit is also made of micro-strip lines and used for power control and reflected wave protection.

TS-2000/X

Fig. 17

1.2GHz Unit Transmitter Section

The 10.595MHz transmit signal from 12TIF is amplified in the sending IF amplifier (Q304). This signal is input into the sending mixer (Q1 and Q2).

The 135.395MHz signal converted in Q1 and 2 passes through the MCF (XF2) and IF amplifier (Q3), is input into the diode mixer (D1) and converted to 1240~1300MHz. This signal is amplified to approximately 0dB in the sending RF amplifier (IC1 and Q5), then input to IC2.

It is amplified to approximately 1W in the drive power module (IC2) and to approximately 10W in the final power module (IC3), then sent to the antenna terminal (12ANT).

12ANT

Q15

1240~ 1300MHz

L12 L10

1240~ 1300MHz

X57-605

12TIF

TX-RX 3 (X57-607)

Q48

10.695 MHz

IC3

XF2

D1 Q3 Q304

D10

1104~ 1165MHz

135.395

Q1,2

MHz

124.800

IC2 IC1Q5

MHz

ANT1 ANT2

output

Fig. 18

HF RX ANT

ATT

–12dB

X57-605

L10 L9

IC2

IN–

IN+

IC1

1 2

D10

D11

Filter (X51-315)

Q1Q3

Q2Q4

D4 D3

VR1

TC1

LPF

1.8MHz

3.5MHz

7MHz

10MHz : E

14MHz : E, 10&14MHz : K

21MHz

28MHz

50MHz

VSR VSF

X45-360 (A/2)

Q6,7

X57-605

Fig. 16

TS-2000/X

CIRCUIT DESCRIPTION

Digital Control Circuit

■ Outline

The TS-2000/X control circuit has a multi-chip configuration centered around a main microcomputer (IC8), and contains a latch circuit for input/ output, a TNC and a DSP. Refer to the digital control block diagram.

■ Main microcomputer peripherals

Four serial communication devices utilizing a UART function (panel microcomputer, TNC, mobile head and PC serial port) are connected to the main microcomputer. An EEPROM (IC7) for backup and a DTMF decoder (IC12) for DTMF signal detection are also connected to the microcomputer.

The input/output circuit and DSP are connected through an address bus and a data bus. The bus to the DSP is connected through 5V ↔ 3V voltage conversion ICs (IC9, IC10, and IC11)

The microcomputer operates with an internal core voltage of 3.3V, an external I/O voltage of 5V and an internal frequency of 22.1184MHz (11.0592MHz x 2).

Panel micro-

computer

2 Chip TNC (by TASCO)

Mobile

head

■ TNC

The TNC is the same as the one used in the TH-D7. The TNC uses a lithium battery to back up various settings. When a 9600bps communication speed is used, the TNC analog signal is connected directly to the transmitter/receiver circuit without passing through the DSP.

■ Input/output latch circuit

A latch IC is used in stead of several input/output ports. Since the latch IC has a latch function only, the latch circuit contains an input latch logic circuit (IC13, IC14, IC15) and an output latch logic circuit (IC16, IC17, IC18) to generate the signals required for the latch IC using the main microcomputer’s address bus information. This configuration is also used for the latch IC of the DSP section.

■ Other peripheral circuits

The main microcomputer is connected with other peripheral circuits, such as a reset circuit that generates a reset signal, a reduced voltage detection circuit that detects reduced voltage and generates a reduced voltage signal, and an over-voltage detection circuit that detects over-voltage and generates an over-voltage signal.

PC (RS-232C)

Reset circuit

Over voltage

detection circuit

Over voltage

detection circuit

Logic circuit

for output latch

IC16~IC18

Latch IC for output

TC74VHC573FT

IC21~IC25

Output port

Main

microcomputer

Address bus (5V)

Data bus (5V)

Logic circuit

for input latch

IC13~IC15

IC8

Latch IC for input

TC74VHC573FT

IC19,IC20

Input port

EEPROM

ATMEL

AT25128N

DTMF decoder

LC73881

Conversion

from 5V to 3V

IC10,IC11

Conversion

between 5V and 3V

RIF

CODEC IC

SDET

TIF

IC7

IC12

IC9

AK4524

IC518

DSP2 (IF DSP)

TMS320VC5402PGE

DSP2 address bus (3V)

DSP2 data bus (3V)

Logic circuit for output latch

IC507

Latch IC for output

TC74VHC573FT

IC505,IC506

Control (X53-391)

Address bus (3V)

Data bus (3V)

IC515

FLASH ROM

IC504

DSP1 (AF DSP)

TMS320VC5402PGE

IC516

DSP1 address bus (3V)

DSP1 data bus (3V)

Logic circuit for input latch

IC509~IC511,IC513

Latch IC for input

TC74VHC573FT

IC512,IC514

CODEC IC

FLASH ROM

IC508

AK4518

IC522

AK4518

IC523

MANO SANO MIC/DRU

VS-3

AGC

Output port

Fig. 19 Digital control block diagram

Input port

CIRCUIT DESCRIPTION

TS-2000/X

■ Firmware

The main microcomputer firmware includes adjustment firmware and user firmware. When repairs or adjustments are made in service, the user firmware must be rewritten to make adjustment firmware. It must be restored to the original user firmware after repairs or adjustments. The adjustment firmware provides a warning display and a warning sound when the power goes on.

DSP Circuit

■ Outline

The TS-2000/X DSP circuit is composed of two DSPs (IC515 and IC516) and CODEC ICs (IC518, IC522 and IC523), an input latch circuit, flash ROM (IC504 and IC508). It is connected with the main microcomputer (IC8) by an address bus and a data bus through the voltage conversion ICs (IC9, ID10 and IC11). The SSB, CW, AM and FSK detection, modulation and AGC operation are done by the DSP, and digital processing (digital filtering, noise reduction, etc.) is performed in all modes.

■ DSP

The DSP operates with an internal core voltage of 1.8V, an external I/O voltage of 3.3V and an internal frequency of

99.5328MHz (11.0592MHz x 9).

The two DSPs perform the respective IF processing and AF processing. The IF processing is done by DSP2 (IC515) and a 24 bit CODEC IC (IC518) is connected to it. DSP2 performs detection, modulation, AGC processing and IF digital filtering. It is designed so it does not exceed the processing time, even if the main band transmission and reception and sub-band reception are done simultaneously. An output latch circuit is connected to DSP2 to convert the analog AGC voltage signal from digital to analog before output. The conversion is done by the ladder resistance method.

The AF processing is done by DSP1 (IC516) and a 16 bit CODEC IC (IC522, IC523) is connected to it. DSP1 performs the speech processing (signaling generation, detection, noise reduction, speech filtering, and various volume processing). The input latch circuit is connected to DSP1 and various signals from the main microcomputer and the microphone selection signal are input into it.

■ Flash ROM

The respective programs and data are stored in the Flash

ROM (IC508 and IC504) connected to DSP1 and DSP2.

■ CODEC IC

A 24 bit CODEC IC (IC518) is used as the IF signal system. DSP2 carries out 32 bit digital processing for detection and modulation. The operation of this IC is controlled by the main microcomputer.

Two 16 bit CODEC ICs (IC522 and IC523) are used as the AF signal system. These IC outputs directly enter the AF amplifier, are amplified and then output from the speaker. The IC input consists of the MIC input and the optional speech synthesis unit (VS-3).

The various timing signals required by both CODEC ICs are generated and supplied by a 12.288MHz quartz crystal and a peripheral circuit.

■ Communication between DSPs

DSP1 and DSP2 are connected via serial communication and perform such interchanges as audio signals for transmission processed in DSP1, received speech signals detected in DSP2 and information from the DSP1 input latch circuit. If this interchange does not go well when the power starts up, a “DSP COMM” error will be displayed on the LCD and the fact that the DSPS is not operating will be notified to the main microcomputer. Likewise, when the content of the flash ROM is abnormal, a “DSP COMM” error is displayed.

TS-2000/X

DESCRIPTION OF COMPONENTS

FINAL UNIT (HF) (X45-360X-XX) (A/2)

Ref. No. Use / Function Operation / Condition

Q1,2 Q3,4 Drive amplifier HF/VHF band push-pull wide-band

Q6,7 Final amplifier HF/50MHz band push-pull wide-

Q8 Bias control HF/50MHz band final stage bias

Q101,102

Q103 Bias control VHF band final stage bias current

Q201 Switching ANT1 and ANT2 changeover relay

Q202 Switching AT relay control Q203 Switching HF RX antenna relay control Q204 Switching Fan control (high speed) Q205 Switching Fan control (low speed) Q206 Switching Q207 Switching Power relay control (K201) Q208~215 Q216,217

IC201,202 IC203 AVR SB→10V IC204 AVR 8V→5V IC205 Extended I/O LPF control signal serial-parallel IC801 Extended I/O IC802 Extended I/O IC803 Extended I/O AT coil control signal serial-parallel D1 Switching D2,3 Temperature Drive stage bias current control

D5 Switching D6 Surge absorption Relay (K1) D7,8 Temperature HF/50MHz band final stage bias

D101 High-frequency VHF band reflected wave detection

D102 High-frequency VHF band forward wave detection

D103,104

D201 Surge absorption Power surge protection D202 Surge absorption Fan D203 Zener diode Over voltage detection D204 Surge absorption Relay (K201)

Predrive amplifier

Final amplifier VHF band push-pull wide-band

Switching Switching VHF band TX/RX changeover relay

AVR SB→8V

compensation

compensation current control

rectification

rectification Temperature VHF band final stage bias current compensation control

HF/VHF band amplifier

amplifier

band amplifier

current control

amplifier

control

High power supply voltage protection

HF/50MHz band LPF band changeover

control

AT input C control signal serial-parallel AT output C control signal serial-parallel

HF/VHF band drive input changeover

HF/VHF band drive stage bias changeover

Ref. No. Use / Function Operation / Condition

D206~209 D210 Reverse current VHF band TX/RX relay control line

D801~824

Surge absorption IC205 output line protection

prevention Surge absorption Antenna tuning relay (K801~824)

FINAL UNIT (430) (X45-360X-XX) (B/2)

Ref. No. Use / Function Operation / Condition

Q901,902 Q903 Drive amplifier UHF band amplifier Q904 Bias control Final stage bias current control Q905 Final amplifier UHF band final stage amplifier D901 Temperature Drive stage bias current control

D902,903

D904 High-frequency Forward wave voltage detection

D905 High-frequency Reflected wave voltage detection

D906 Switching Antenna switch D908,909

Predrive amplifier

compensation Temperature Final stage bias current control compensation

rectification

Switching Antenna switch

UHF band amplifier

FILTER UNIT (X51-315X-XX)

Ref. No. Use / Function Operation / Condition

Q1 Signal amplifier AT phase signal amplifier Q2 Signal amplifier AT amplitude signal amplifier Q3 Signal amplifier AT phase signal amplifier Q4 Signal amplifier AT amplitude signal amplifier IC1 Comparator IC2 D flip-flop D2 Surge absorption Relay (K2) D3 High-frequency HF/50MHz band reflected wave

rectification detection

D4 High-frequency HF/50MHz band forward wave

rectification detection D5~7 Surge absorption Relay (K1,K3,K4) D8,9 Surge absorption Lightning surge protection D10 High-frequency AT phase signal detection

rectification D11 High-frequency AT amplitude signal detection

rectification D201,251 Surge absorption Relay (K201/K202, K251/K252) D301,351 Surge absorption Relay (K301/K302, K351/K352)

AT control amplitude signal discrimination AT control phase signal discrimination

DESCRIPTION OF COMPONENTS

TS-2000/X

Ref. No. Use / Function Operation / Condition

D401,451 Surge absorption Relay (K401/K402, K451/K452) D501,551 Surge absorption Relay (K501/K502, K551/K552)

CONTROL UNIT (X53-391X-XX)

Ref. No. Use / Function Operation / Condition

Q1 Switching Q2 Switching Q3 Switching Q4 Switching Q5 Switching Power on at L level Q9,10 Switching Q13 Buffer amplifier 9600 bps RX signal Q14 Buffer amplifier 1200 bps RX signal Q15,16 Amplifier Q17 Switching Backup processing control of panel

Q18 Switching RS-232C related power source

Q19,20 Switching Q501 Switching IC1 Reset IC For main microcomputer IC2 AVR Digital system 5V generation IC3 AVR 5V constantly on IC4 IC5,6 Analog switch Main microcomputer ADC input

IC7 EEPROM For storage of various set values IC8 IC9

IC10,11 Conversion from Main microcomputer and DSP data

IC12 IC13~18 Input/output port Logic of latch IC used as input/

IC19,20 Input port Used as input port for main micro-

IC21~25 Output port

IC26 IC27 OP amplifier A/2 : 1200 bps RX AF amplifier

IC28 TNC logic circuit TNC logic IC29 OP amplifier A/2 : 1200 bps RX AF amplifier

3.3V AVR for DSP

Main microcomputer Conversion between 5V and 3V

5V to 3V conversion DTMF decoder IC

logic output port

TNC microcomputer

TT signal output control of external AT TT signal input control of external AT TS signal output control of external AT TS signal input control of external AT

Waveform shaping of TNC TX signal

microcomputer

(X57-605 A/9)

3.3V

changeover

Primary main unit operation Two-way conversion

For DTMF decoding

computer Used as output port for main microcomputer Dedicated TNC microcomputer

B/2 : 9600 bps RX AF amplifier

Ref. No. Use / Function Operation / Condition

IC30 Comparator IC31 AND Sends DSP1 and DSP2 WAIT

IC32,33 Reset IC IC501 AVR 3V within control IC502,503 IC504 IC505,506 IC507 Input/output port Logic of latch IC used as input/

IC508 IC509 Input/output port Logic of latch IC used as input/

IC510 Input/output port

IC511 Input/output port Logic of latch IC used as input/

IC512 IC513 Input/output port Logic of latch IC used as input/

IC514 IC515 DSP For IF processing IC516 DSP For AF processing IC517 IC518 CODEC (24 bit) RIF input, TIF output IC519,520

IC521 For CODEC

IC522,523 IC524~529

IC530 Serial/parallel For microphone input changeover IC531~534 IC535 Buffer for analog

D5,6 Reverse current

D11,12 Reverse current

D13

D14~17 Reverse current

D501~504

1.8V AVR for DSP Flash ROM for DSP2 For DSP port output

logic output port Flash ROM for DSP1

logic output port

logic

logic output port For DSP port input

Analog AGC buffer

For CODEC clock division

clock division CODEC (16 bit) Microphone input, AF output Buffer for analog signal input/output

Analog switch For input/output changeover

signal input/output

prevention

prevention Reference voltage source

prevention Reverse current prevention

Waveform shaping of modem TX signal

signal to CPU through AND circuit

1.8V For program and coefficient storage Used as output port (AGC output)

For program and coefficient storage

Used as input port

Analog AGC voltage buffer

Operation at 12.288MHz frequency

Connection to CODEC input/output

TS-2000/X

DESCRIPTION OF COMPONENTS

DISPLAY UNIT (X54-3320-00)

Ref. No. Use / Function Operation / Condition

Q1~3 AVR LCD backlight IC1 LCD driver LCD 7-segment driver (B-SEG) IC2 LCD driver LCD 7-segment driver (A-SEG) IC3 LCD driver LCD dot segment driver IC4 Serial/parallel D1 LED On when VOX is selected D2 LED On when PROC is selected D3~9 LED Key illumination

LED control, backlight dimmer control

TX-RX 1 UNIT (X57-605X-XX)

Ref. No. Use / Function Operation / Condition

Q1 RF mute On in HF/50MHz TX mode Q2 Switching On in HF/50MHz RX mode Q3 Switching Q2 control Q4 Switching Dedicated external RX antenna

changeover relay control Q5 Switching HF/50MHz RF ATT control Q6 Switching On in 50MHz TX mode Q7~10 RX 1st mixer RX 1st IF 69.085/75.925MHz Q11 Switching Q12 RF amplifier When HF-21.5MHz Q13 Amplifier 1st local oscillation amplifier Q14,15 Switching Q12 control Q16,17 Switching Q16 turns on when first IF change-

Q18 Amplifier RX 1st IF 69.085/75.925MHz Q19,20 RX 2nd mixer Converts RX 1st IF to 10.695MHz Q21 Switching Reserved Q22 Amplifier For NB 10.695MHz Q25 Amplifier RX 2nd IF amplifier 10.695MHz Q26 Amplifier NB amplifier 10.695MHz Q27 DC amplifier NB AGC amplifier Q28 Amplifier NB amplifier 10.695MHz Q29 Switching On at time of NB blanking Q30 Buffer amplifier Impedance changeover Q31 Switching On at time of NB blanking Q32 Amplifier RX 3rd local oscillation amplifier

Q33 Switching Q34 Switching Creates RXB in FM mode Q37 Switching Creates RXB in non-FM mode Q38 Amplifier 3rd IF amplifier (455kHz) Q40 Switching On during RX in non-FM mode Q41 Amplifier Q42 Buffer amplifier 4th IF frequency (12kHz)

Off when HF/50MHz preamplifier on

over control is 75.925MHz

(11.150MHz)

On when 1st IF frequency is 69.085MHz

RX 4th local oscillation amplifier (467kHz)

Ref. No. Use / Function Operation / Condition

Q43 Amplifier HF/50MHz TX drive amplifier Q44,45 TX 3rd mixer Converts 68.985/75.825MHz to TX

frequency

Q46,47 TX 2nd mixer Converts 10.695MHz to 68.985/

75.825MHz Q48 Buffer amplifier 10.695MHz Q49 Q51 Switching Keying control Q52 Q53 Switching On during TX in non-FM mode Q54 Q57 Switching Q58 Limiter FM modulation signal limiter

Q59 Oscillator Q60 Switching On during TX in non-FM mode Q61,62 Mute On when main and sub are

Q63,64 DC-DC oscillator –6V generation Q65 Switching Q66 Switching On when relay for HF band linear

Q67 Switching Q69,70 AVR AVR for mobile controller

Q71,72 Switching 50MHz/VHF/UHF/1.2GHz band

Q73,74 Amplifier ALC amplifier Q75 Switching On in AM mode, makes it an

Q76 Amplifier ALC amplifier Q77 Switching Turns on and lowers the power at

Q78,79 Amplifier ALC amplifier Q80~91 Switching Produces the respective TXB and

Q92 Switching Cancels the time constant for VSF

Q93 Buffer amplifier Buffer amplifier for external

TX 2nd IF amplifier

DC buffer amplifier

TX 2nd IF amplifier

10.695MHz

ALC keying control

10.695MHz

On during transmission in FM mode

(elimination of AM component) FM oscillator, modulation 10.595MHz

simultaneously AF muted

On when relay for HF band linear is used

is transmission On when relay for HF band linear is used

(Power about 9.4V)

external linear control

average value type ALC

time of protection

RXB from 8C to HF/50MHz, VHF band, UHF band and 1.2GHz bands. The synthesis of the TXB becomes IF TXB and the synthesis of the RXB becomes IF RXB. This control voltage is necessary for simultaneous TX/RX, such as for satellite communication.

and VSR voltage lines during antenna tuning

modulation input signal

DESCRIPTION OF COMPONENTS

TS-2000/X

Ref. No. Use / Function Operation / Condition

Q94,95 Buffer amplifier Buffer amplifier for ANO output of

main and sub band

Q96 Switching External squelch output of main

and sub bands (open collector) Q97 Q101~112 Q601 Amplifier 31.2MHz Q602 Buffer amplifier RX 4th local oscillator (467kHz) Q603 Amplifier 31.2MHz Q604 Buffer amplifier TX 1st oscillator (10.595MHz) Q605 Amplifier 31.2MHz Q606 Buffer amplifier RX 3rd local oscillator (11.150MHz) Q607,608 Q609 Switching DC switch Q700,701

Q702 Switching Gain correction, on when RX 1st IF

Q703 Switching L69 tuning correction, on when RX

Q704 Switching On during TX in FM mode Q705 Amplifier On RF amplifier is 21.5~60MHz Q706~708 Q709 Buffer amplifier 455kHz Q710 Amplifier Squelch noise amplifier Q711 Q712,714 Q715 Amplifier DRU output amplifier Q800 Switching On when FUNC switch is selected Q801 AVR For LED Q802 Switching On in main band TX mode Q803 AVR For LED Q804 Switching On when main band BSY Q805 AVR For LED Q806 Switching On in sub band TX mode Q808 Switching On when sub band BUSY Q811 Switching Q813 Switching On when modem STA is active Q815 Switching On when a modem is connected Q817 Switching On when MULTI ENC is sctive Q819 Switching On when sub receiver is on Q820,822 Q951 Switching Reset control IC1 FM IF IF amplifier, Squelch IC2 OP amplifier A/2 : ALT voltage buffer

IC3 Mixer RX 4th mixer (Output : 12kHz)

DC buffer amplifier Switching On when RF BPF SW is selected

Switching

Mixer RX 3rd mixer and 3rd IF frequency

Switching On at time of Q705 operation

TX 2nd IF amplifier Switching On during TX in FM mode

Switching On when key illumination is on

Ripple filter for AF IC (IC9) power supply

On when 1st IF frequency is 69.085MHz

(455kHz)

is 69.085MHz

1st IF is 69.085MHz

10.695MHz

On when modem 9600 bps is selected

B/2 : FM AF amplifier

Ref. No. Use / Function Operation / Condition

IC4 OP amplifier A/2 : Unused

B/2 : AGC reference voltage buffer IC5 Extended I/O RF BPF changeover control IC6 Mixer TX 1st mixer (Output : 10.595MHz) IC7 Multiplexer Receiver output, FM (AF) and non-

FM (IF) changeover IC8 Analog switch

IC9 AF PA Main and sub 2 channels IC10 Level converter RS-232C level and 5V conversion IC11 Buffer amplifier Voltage buffer IC12 OP amplifier 1/4 :

IC13 OP amplifier A/2 : ALC reference voltage buffer

IC14 DAC 1/8 : TX power control voltage

IC15 DAC 1/8 :

IC16 Extended I/O Q0 : L when RX 10.695MHz XF5 is

Modulation input, FM (AF), non-FM

(IF) and packet (AF) changeover

TX power gain control voltage buffer 2/4 : Unused 3/4 :

RX IF gain control voltage buffer 4/4 :

TX band gain control voltage buffer

B/2 : ALC meter voltage buffer

2/8 : ALC reference voltage 3/8 : Unused 4/8 : Protection voltage 5/8 : TX power gain control voltage 6/8 : Unused 7/8 : TX band gain control voltage 8/8 : RX IF gain control voltage

HF/50MHz TX BPF control voltage 2/8 :

RF unit RX sub BPF control voltage 3/8 :

RF unit RX main BPF control voltage 4/8 :

RF unit TX UHF BPF control voltage 5/8 : H in non-FM mode 6/8 : Unused 7/8 : Unused 8/8 : NB level control voltage

selected Q1 : L when RX 10.695MHz XF6 is selected Q2 : L when RX 10.695MHz through is selected Q3 : L when AT tuning Q4 :

L when RX 455kHz CF1 is selected

Q5 :

L when RX 455kHz CF2 is selected

Q6 :

L when RX 455kHz CF3 is selected Q7 : Reserved Q8 : Reserved Q9 : Unused Q10 :

H when main squelch is open

Q11 : H when sub squelch is open

TS-2000/X

DESCRIPTION OF COMPONENTS

Ref. No. Use / Function Operation / Condition

IC17 Extended I/O Q0 : H when UHF ATT is on

Q1 : H when VHF ATT is on Q2 : H when HF/50MHz ATT is on Q3 : L when external RX antenna terminal is selected Q4 : L when HF/50MHz preamplifier is selected Q5 : H when RX 1st IF 75.925MHz is selected Q6 : H during AM TX Q7 : H during TX in PKD and 9600 bps is selected Q8 : H during TX in non-FM mode Q9 : H during RX in non-FM mode Q10 : H when linear amplifier usage is selected in HF or 50MHz band Q11 : H when linear amplifier usage is selected in either band

IC18 OP amplifier A/2 : 5V voltage source

B/2 : Amplifier 455kHz

IC19 OP amplifier A/2 : VSR voltage amplifier

B/2 : VSF voltage amplifier IC601 DDS RX 4th local oscillator (467kHz) IC602 DDS TX 1st local oscillator (10.595MHz) IC603 DDS RX 3rd local oscillator (11.150MHz) IC604 Inverter Polarity inversion IC605 AVR 14S→8V IC801 CPU Display microcomputer D1 Surge absorption Relay (K1) D2 Surge absorption External RX antenna terminal D3 Surge absorption Relay (K2) D4~6 Surge absorption Internal circuit protection D7 Switching RX/TX changeover, on during RX D8 Switching On when RF BPF under 1.705MHz

is selected D9 Surge absorption Internal circuit protection D10 Switching On when RF BPF under 1.705MHz

is selected D11 Switching On when RF BPF over 1.705MHz

is selected D12,13 Switching

D14,15 Switching On when RF BPF of 2.5~4.1MHz

D16,17 Switching On when RF BPF of 4.1~6.9MHz

D18,19 Switching On when RF BPF of 6.9~7.5MHz

On when RF BPF of 1.705~2.5MHz

is selected

Ref. No. Use / Function Operation / Condition

D20,21 Switching On when RF BPF of 7.5~10.5MHz

is selected

D22,23 Switching

D24,25 Switching

D26 Switching RX/TX changeover, on during TX D27,28 Switching

D29,30 Switching On when RF BPF of 21.5~30MHz

D31,32 Switching On when RF BOF of 30~49MHz

D33,34 Switching On when RF BPF of 49~54MHz is

D35,36 Switching D38,39 Switching D40 Switching HF/50MHz LO1 TX/RX changeover D41,42 Switching RX 1st MCF changeover D45 Switching HF/50MHz LO2 changeover D46 Switching HF/50MHz and VHF/UHF band RX

D47 Switching 1.2GHz RX IF input changeover,

D48 Reverse current Main RBK and NB mute signal

prevention

D49 Switching 10.695MHz IF filter changeover,

D50 Switching 10.695MHz IF filter changeover,

D52 Switching 10.695MHz IF filter changeover,

D53 Switching 10.695MHz IF filter changeover,

D55 Switching 10.695MHz IF filter changeover,

D56 Switching 10.695MHz IF filter changeover,

D57 Switching 10.695MHz IF filter changeover,

D58 Switching 10.695MHz IF filter changeover,

D60 Switching 10.695MHz IF filter changeover,

D61 Switching 10.695MHz IF filter changeover,

D62 Switching 10.695MHz IF filter changeover,

On when RF BPF of 10.5~13.9MHz is selected On when RF BPF of 13.9~14.5MHz is selected

On when RF BPF of 14.5~21.5MHz is selected

is selected

and 54~60MHz is selected

selected On when ~60MHz preamplifier is on On when ~21.5MHz preamplifier is on

IF input changeover, 10.695MHz

10.695MHz

matching, main side mute when on

on when wide (6kHz) is selected

on when narrow (2.7kHz) is selected

on when through is selected

on when narrow (2.7kHz) is selected

on when wide (6kHz) is selected

on when through is selected

on when wide (6kHz) is selected

on when narrow (2.7kHz) is selected

on when through is selected

on when wide (6kHz) is selected

on when narrow (2.7kHz) is selected

DESCRIPTION OF COMPONENTS

TS-2000/X

Ref. No. Use / Function Operation / Condition

D64 Switching 10.695MHz IF filter changeover,

on when through is selected

D65 Reverse current Matching of main VHF and main

prevention UHF changeover signal D66 Detection NB switching pulse detection D67 Switching 455kHz IF filter changeover D68 Switching On when FM mode is selected in

main band D69 Switching 455kHz IF filter changeover D70,71 Switching 455kHz IF filter changeover D73 Switching On when non-FM mode is select-

ed in main band D75 Switching On during HF/50MHz TX D76~79

D80 Switching TX IF output HF/50MHz, VHF/UHF

D81 Switching TX IF output 1.2GHz changeover D82 PIN diode D83 Reverse current Matching of VTXB and UTXB

D84 PIN diode TX gain setting of each band D85 Reverse current

D86 LED For constant voltage D87~89 Reverse current

D90 Switching TX IF FM mode/non-FM mode

D91 D92,93 Reverse current Creates IF TXB

D94,95 Reverse current Creates IF RXB

D96 Zener diode D97 Rectifier Creates minus voltage D98 Surge absorption Relay (K3) D99 Reverse current Matching of start signals from PC

D100 Zener diode Port protection D101 Poly-switch Over voltage detection D102 Zener diode

D103,104 D105 LED Creates reference voltage D106 Reverse current External ALC matching

D107 Zener diode External ALC voltage shift

Variable capacitor

prevention

Variable capacitor

prevention

prevention and mobile panel

Surge absorption

prevention

Voltage varies (2 stages) according

to the TX band

changeover

TX IF gain variable according to TX power

changeover, 10.595MHz

FM modulation 10.595MHz

Stabilizes minus power source to –6V

Reference voltage of constant voltage

power source for mobile panel

Ref. No. Use / Function Operation / Condition

D108 Zener diode Voltage shift D109,110

D111 Reverse current

D112 Zener diode Port protection D113 Zener diode Voltage shift, lower power when

D114 Zener diode Set so the power does not to rise

D115,116

D117,118

D119 Reverse current UHF forward wave

D120 Reverse current UHF reflected wave

D121 Reverse current 1.2GHz forward wave

D122 Reverse current 1.2GHz reflected wave

D123 Reverse current VHF forward wave

D124 Reverse current VHF reflected wave

D130 PIN diode RX gain adjustment 455kHz D700~702

D703

D704,705

D706 Reverse current On at 21.5~60MHz

D707 Rectifier Noise rectification for FM squelch D708 Reverse current Leak current prevention

D709 Zener diode 8V→5V D710 Voltage shift Temperature compensation D711 Reverse current Discharge path (non-FM mode)

D712,713 D714 Voltage shift D715

D716 Reverse current

Reverse current External ALC matching prevention

prevention

power voltage drops

when the power voltage goes up Reverse current Meter line prevention Reverse current External standby prevention

prevention

Reverse current prevention Variable capacitor

Switching On when preamplifier is on at

21.5~60MHz

prevention

prevention Cliper External modulation input

Variable capacitor

prevention

Voltage varies (2 stages) according

to the TX band

Voltage varies (2 stages) according

to the TX band

TS-2000/X

DESCRIPTION OF COMPONENTS

Ref. No. Use / Function Operation / Condition

D717 Surge protection D719,720 D721 Reverse current

D801 LED On in main band TX mode D802 LED On when main band BSY D803 LED On in sub band TX mode D804 LED On when sub band BSY D805~809

D810~824 D826~834 D825 LED On when FUNC switch is selected D950~952

D953 LED D954 LED TNC TX buffer state display D955 LED TNC connection state display D956 LED On when MULTI is selected D957 LED Lights when the sub is on

Zener diode External surge voltage protection

prevention

Reverse connection prevention LED Key illumination LED Key illumination

Reverse current prevention

Key matrix

On when TNC 9600 bps is selected

TX-RX 2 UNIT (X57-606X-XX)

Ref. No. Use / Function Operation / Condition

Q1 Switching UHF RX ATT control Q2 Switching VHF RX ATT control Q3 Switching Q11 Switching VHF RX power supply Q13 Switching UHF power supply Q14 Amplifier UHF preamplifier Q15 Amplifier VHF preamplifier Q16 Switching UHF RX power supply Q17 Amplifier UHF TX signal amplification Q18 Amplifier VHF TX signal amplification Q19 Amplifier UHF RX signal amplification Q20 Amplifier VHF TX signal amplification Q21 Amplifier UHF main RX signal amplification Q22,23 Amplifier VHF sub RX signal amplification Q24 Amplifier VHF main RX signal amplification Q25 Amplifier VHF sub RX signal amplification Q26 Amplifier UHF TX signal amplification Q30 Amplifier Q31 Switching Main RX mixer power supply Q32 Amplifier VHF sub RX local oscillator signal

Q33 Amplifier UHF sub RX local oscillator signal

Q34 Amplifier VHF/UHF TX local oscillator signal

Sub band local oscillator power supply

Main RX local oscillator signal amplification

amplification

Ref. No. Use / Function Operation / Condition

Q35 Switching Sub RX AM power supply Q36 Switching VHF sub RX IC6 power supply Q37 Amplifier Sub RX 1st IF signal amplification Q38 Amplifier Main RX 1st IF signal AGC control

amplification

Q39 DC amplifier Sub RX AM AGC control signal DC

amplification

Q40,41 Switching Sub RX FM wide/narrow change-

over control Q42,43 Mixer Main RX 2nd mixer Q44 Amplifier Main RX 2nd mixer local oscillator

signal amplification Q45 Amplifier Sub RX AM signal amplification Q46,47 Mixer TX mixer Q48 Amplifier Sub RX AM signal amplification Q50 Amplifier Q51 Amplifier Sub RX AM signal amplification Q55 Switching VHF sub RX power supply Q56 Switching UHF sub RX power supply Q57 Switching Q58 Switching VHF main RX preamplifier through Q59 Switching UHF main RX preamplifier through Q60 Switching VHF/UHF TX wide-band amplifier

Q61 Amplifier Main RX 2nd IF signal amplification Q62 Switching VHF/UHF TX wide-band amplifier

Q63 Amplifier Q65 Amplifier Q66,67 Switching Sub RX band changeover control Q400~402 Q403 Switching HF LO2 VCO changeover Q404 Switching Sub VCO1 oscillation frequency

Q405 Switching Sub VCO2 oscillation frequency

Q406 SUB VCO1 322.950~426.040MHz (K)

Q407 SUB VCO2 354.950~465.050MHz (K)

Q409 LO2 VCO 58.390~65.230MHz Q410 Switching Sub VCO1 changeover Q411 Switching Sub VCO2 changeover Q412 Doubler 15.6MHz x 2 = 31.2MHz Q413 Amplifier For sub VCO1

Q414 Amplifier For sub VCO2

Active LPF Comparison frequency 5kHz

TX mixer local oscillator signal amplification

Sub RX IF amplifier gain RBK control

power supply

Sub RX squelch signal noise amplification

31.2MHz reference signal amplification

changeover

371.475~381.475MHz (E)

405.050~409.050MHz (E)

(322.950~426.040MHz (K)

371.475~381.475MHz (E))

(354.950~465.050MHz (K)

405.050~409.050MHz (E))

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