Ts2000 инструкция на русском

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Kenwood TS-2000. Руководство пользователя на русском языке.Обновленное и дополненное

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ALL MODE MULTI-BAND TRANSCEIVER

TS-2000/X

SERVICE MANUAL

© 2000-12 PRINTED IN JAPAN
B51-8558-00 (N) 889

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

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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.

2

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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).

3

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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

4

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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

5

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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.

*R

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)

6

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

HL

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

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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.

7

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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

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.

+(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

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.

430MHz 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.

+(D 10.695) – –(D 10.695) –––––

RX TX RX TX RX TX RX TX

– – – –––––

Table 8 430MHz band LO1 frequency shift data

8

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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

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.

1.2GHz 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.

+(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) – – – – – –

–(D 10.695) +(D 10.695) – – – – – –

–(D 10.695) +(D 10.695) – – – – – –

Table 10 RX LO3 frequency shift data

9

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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) – – – –

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) – – – – – –

–2.125k–FSK SHIFT
–1.275k–FSK SHIFT

–2.125k–FSK SHIFT
–1.275k–FSK SHIFT

+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)

10

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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

11

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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

AF

2nd Mixer

Q19,20

10.695
MHz

LO2

IC2

X57-606

FM

D46

RIF

FM IC

FM

DET

IC1

455kHz

D68

CF4

D47

X57-607

12RIF

Q709

Noise blanker

Q22 Q26 Q28

Q38

IC18

4th Mixer

IC3

Q41

Fig. 4

Q25

SW

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

12

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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).

13

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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

D9

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

RIF

14

ATT

–12dB

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

D9

D20Q14

D92 D81

D23

Fig. 6 Sub band receiver section

D94D93Q19

IC5

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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

FM

D58

AM

SLO1

322.95~

465.04MHz

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

D46

IC6

HF

Q22

D49

1.2GHz

SQ

IC9

DSP

X53-391

Fig. 8

15

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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

D5

TX

XF1

135.495
MHz

1104~
1165MHz

D6,7,303

Q9

AGC

Q12 Q11

2nd Mixer

Q7,8

D8

Q15

124.800
MHz

Fig. 9

L33 L30

1240~
1300MHz

Q303

10.695

12RIF

MHz

TX-RX 3 (X57-607)

X57-605

D47

16

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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

X1

IC6

Q604

SSB,CW,
AM,FSKFM2

IC602

DDS

10.595MHz

IC8

X53-391

8

O/I 3

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

17

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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.

18

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Q73 Q74

L119

VSF

43VSF

12VSF

Q75

HF ALC

X45-360
(A/2)

X45-360
(B/2)

X57-607

IC17 (Q6),

R509

J4

REMOTE

(6 pin)

D123

D119

D121

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

CIRCUIT DESCRIPTION

8C

Q79

IC13
(AOUT)

D109

D110

Q48

D111

R439, ALC meter

D82 D84

D85

14S

Q76

D105

Q77

Q78

D108

D107D106

50ALC
14ALC
43ALC
12ALC

78

3

5

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

11

VIN4

12

VSR

VIN1

1

VSR

43VSR

12VSR

VOUT1

2

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

X45-360

D7

D6

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

19

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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

20

X51-315

144ANT

LPF section

TX

K2

Q101,102

VSRVSF

HPFLPF DET

144MHz

Q6,7

Fig. 15

K1

Q3,4 Q2 Q1

Final (X45-360 A/2)

D1

X57-605
HFTX

X57-606
14TX

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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

D8

Q15

1240~
1300MHz

L12 L10

1240~
1300MHz

X57-605

12TIF

TX-RX 3 (X57-607)

Q48

10.695
MHz

IC3

D5

XF2

D1 Q3 Q304

D10

1104~
1165MHz

135.395

Q1,2

MHz

124.800

IC2 IC1Q5

MHz

ANT1 ANT2

Q

output

AT

Fig. 18

HF RX ANT

ATT

–12dB

X57-605

RX

TX

L10 L9

IC2

CK

D

Q

IN–

IN+

IC1

1
2

D10

1

D11

3

Filter (X51-315)

Q1Q3

Q2Q4

C9

L8

D4 D3

L7

VR1

TC1

L6

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

21

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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

CODEC IC

FLASH ROM

IC508

AK4518

IC522

AK4518

IC523

MA

SA

MANO
SANO
MIC/DRU

VS-3

22

AGC

Output port

Fig. 19 Digital control block diagram

Input port

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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.

23

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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

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

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

24

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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

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

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

Used as input port

Analog AGC voltage buffer

Operation at 12.288MHz frequency

Connection to CODEC input/output

Connection to CODEC input/output

25

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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)

26

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

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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

27

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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

is selected

is selected

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

28

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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

prevention

prevention

Variable capacitor

prevention

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

prevention

prevention

prevention

prevention

prevention

Reverse current
prevention
Variable capacitor

Switching On when preamplifier is on at

21.5~60MHz

prevention

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

29

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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

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

power supply

Sub RX squelch signal noise amplification

31.2MHz reference signal amplification

changeover

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))

30