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FCC ID: ALH30643110

Operational Description

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FCCID_60842

FCC ID:ALH30633110 FCC ID:ALH30633120 FCC ID:ALH30633130 X53—3880 CONTROL UNIT TKR—740,840 FCC ID:ALH30643110 FCC ID:ALH30643120 FCC 1D:ALH30643130 Di DA204U DIODE DC CUT D3 DA204U DIODE DC CUT D4 DA204U DIODE DC CUT D5 DA204U DIODE DC CUT D6 DA204U DIODE DC CUT D7 DA204U DIODE DC CUT D8 DA204U DIODE DC CUT D3 DA204U DIODE DC CUT D10 DA204U DIODE DC CUT D11 DA204U DIODE DC CUT D12 DA204U DIODE DC CUT D13 DA204U DIODE DC CUT D14 DA204U DIODE DC CUT D15 DA204U DIODE DC CUT D16 DA204U DIODE DC CUT D17 DA204U DIODE DC CUT D18 DA204U DIODE DC CUT D19 DA204U DIODE DC CUT D20 DA204U DIODE DC CUT D21 DA204U DIODE DC CUT D22 DA204U DIODE DC CUT D24 DA204U DIODE DC CUT D25 DA204U DIODE DC CUT D26 DA204U DIODE DC CUT D27 DA204U DIODE DC CUT D28 DA204U DIODE DC CUT D30 DA204U DIODE DC CUT D31 DA204U DIODE DC CUT D32 DA204U DIODE DC CUT D34 DA204U DIODE DC CUT D35 DA204U DIODE DC CUT D36 DA204U DIODE DC CUT D37 DA204U DIODE DC CUT D38 DA204U DIODE DC CUT D39 DA204U DIODE DC CUT D70 OLA301DB LED ASSY DI SPLAY 7 SEGMENT D70 1LA301DB LED ASSY DI SPLAY 7 SEGMENT D70 2B30—0864—0 5 LED DI SPLAY D70 3B30—2198—0 § LED DJ SPLAY D70 4830—2197—0 5 LED DJ SPLAY D70 58B30—2198—0 5 LED D1 SPLAY D70 6DA204U DIODE DC CUT D70 THSMBBAS DIODE AG C DETECT D70 8DA204U DiODE DC CUT D7O IHSMBB8AS DIODE AG C DETECT D71 OMINISMDCO7 5—02 VARISTOR CU RRENTPROTECT D71 1DA204U DIODE DC CUT D71 2DA204U DIODE DC CUT 1C1 TC7S66FU IC AN ALOG SWITCH 1C3 NJM78LO5UA IC AV 1C4 TATBOSF IC AV 1C§ NJM78LOB8UA IC AV 1C6 TA7SO5F IC AV 1C7 AT29C020—9 OTI 1C FL

FCC ID:ALH30633110 FCC 1D:ALH30633120 FCC ID:ALH30633130 1C10 RHSVL42C 1C RE SET IC FCC ID:ALH30643110 1C12 NJM4558E IC AF AMP FCC ID:ALH30643120 1C13 NJM4558E IC AF AMP FCC ID:ALH30643130 1C14 BU4053BCF iC AN ALOG SWITCH 1C15 TC74VHC245 FT IC BU S TRANSCEIVER 1G16 TC7AVHC245 FT IC BU S TRANSCEIVER 1C17 30622M4—10 3GP MPU CP U/LCD DRIVER 1C18 30622M4—10 3GP MPU CP U/LCD DRIVER 1C22 NJM4558E IC AF AMP 1023 NJM4558E IC AF AMP 1024 TC74HC4040 AF IC CO UNTER 1C25 TC7SO4F IC IN VERTER 1027 PGM3000E IC CO DEC 1029 BU4053BCF 1C AN ALOG SWITCH 1030 ADSP2185BS T133 1C DS P 1C31 NJM4558E IC AF AMP 1C32 NJM4558E 1C AF AMP 1C33 M6é2364FP IC D/ A CONVERTER(ADJUSTMENT) 1034 NJM4558E IC AF AMP 1035 TC7S32FU IC OR GATE 1036 NJM4558E IC AF AMP 1037 BU4053BCF C AN ALOG SWITCH 1038 TC7S0O0FU IC NA ND GATE 1039 BU4O94BCFV 1C SH IFT REGISTOR 10640 NJM4558E 1C AF AMP 1042 ADM232LAR 1C DC #NAME? 1C46 TC7S32FU IC OR GATE 1C47 TC7S32FU IC OR GATE 1C48 TC7S32FU 1C OR GATE 1C49 TC7S32FU o OR GATE 1C70 OBU2114F IC SH IFT REGISTOR 1C70 1BU2114F IC SH IFT REGISTOR 1070 2BU2114F IC SH IFT REGISTOR 1070 3BU2114F 1C SH IFT REGISTOR 1C70 4ANJM78LO5UA 1C AV R 1C70 5TA7BLOSF 1C AV R 1C70 GNJM7BLO5UA 1C AV R Q1 2SK 1824 FET BE AT SHIFT SWITCH QsS 2SK1824 FET BE AT SHIFT SWITCH Q8 DTC144EUA TRANSISTOR IN VERTER es DTC114EUA TRANSISTOR IN VERTER Q10 DTC144EUA TRANSISTOR IN VERTER Q11 DTC363EK TRANSISTOR AU DIO MUTE @70 02SA158§(Y, GR) TRANSISTOR AG C AMP @70 12S5C4116(Y¥) TRANSISTOR AG C AMP 70 GDTA1I4EUA TRANSISTOR DC SWITCH 70 7DTC144EUA TRANSISTOR DC SWITCH +Q70 BDTA114EUA TRANSISTOR DC SWITCH Q70 9DTC144EUA TRANSISTOR DC SWITCH Q71 ODTC144EUA TRANSISTOR DC SWITCH

FCC 1D:ALH30643110 X56—3050~—1 0SK TX UNIT TKR—840 D1 1SV283 VARIABLE CAPACITANCE DIODE FREQ.CONT D2 195V283 VARIABLE CAPACITANCE DIODE FREQ.CONT D3 1SV283 VARIABLE CAPACITANCE DiODE FREQ.CONT D4 15V283 VARIABLE CAPACITANCE DIODE FREQ.CONT D5 1SV283 VARIABLE CAPACITANCE DIODE MODULATION D6 1SV283 VARIABLE CAPACITANCE DIODE MODULATION D7 1SV128 DIGDE RF SW D8 DA204U DIODE CUEERNT STEERING D11 159355 DIODE CUEERNT STEERING D12 1$$355 DIODE CUEERNT STEERING D50 830—2130—05 LED DISPLAY D51 —B30—2130—05 LED DISPLAY D52 830—2048—05 LED DISPLAY D101 1SV128 DIODE RF SW D103 1SV128 DIODE RF SW D201 1SV283 VARIABLE CAPACITANCE DIODE FREQ.CONT D202 1SV283 VARIABLE CAPACITANCE DIODE FREQ.CONT ©203 15V283 VARIABLE CAPACITANCE DIODE MODULATION D205 HSMB88AS DIODE RF DET ©206 MINISMDCO75—02 VARISTOR CURRENT PROTECT D207 199355 DiODE CUEERNT STEERING D303 ERZ~M14DK220M SURGE A8 SORBER CURRENT PROTECT D304 155355 DIODE CURRENT STEERING D305 DSM3MA!1 DIODE REVERSE VOLTAGE OROTECT D306 HSMB8AS DIODE RF DET D307 HSMS88AS DIODE RF DET ©308 HSMSBAS DIODE RF DET D310 MINISMDCO75—02 VARISTOR CURRENT PROTECT D312 02CZ12(X,Y) ZENER DL ODE VOLTEGE REF. D317 159355 DIODE CURRENT STEERING D318 159355 DIODE CURRENT STEERING D500 MINISMDE190 VARISTOR CURRENT PROTECT 1C1 TA7B08S IC AVR 102 NJM7BLO8UA IC AVR I1C3 M62364FP IC ELECTRIC VOLUME 1C4 BU4O94BCFV 1C SHIFT REGSTOR 105 TCT4HC14AF 1C INVERTOR 1C100 TA7SSO1F IC AVR 1C101 SA7O25DK IC PLL 1C102 TA75S01F IC AVR 1C103 NJM78LOSUA IC AVR iC105 NJM4558E 1C OP AMP 1C106 AT2408N10S12.5 IC EEPROM 1G107 NJM4558E IC OP AMP 1C 108 NJM7BLO8UA IC OP AMP 1C109 NJM2904E IC OP AMP IC 110 NJM7BLO5UA IC AVR 16200 TC4S81F IC OP AMP 10201 SA7O25DK IC PLL 1C202 AD983§BRU MOS 1C DDS 10203 NJM2904E IC OP AMP 10204 NJM2903M 1C COMPARATOR 10205 NJM78L.05UA IC AVR 1C301 MB8732HA IC POWER MODULE

FCC ID:ALH30643110 10302 OP291GS IC OP AMP 10303 OP291GS IC OP AMP 10304 TC4WGGF IC MULTIPLEXER Q1 2SK508(K52) FET OSC Q2 2S5K508(K52) FET OSC Qs 25C3722K(S) TRANSIST OR DC SW Q4 2SC3722K(S) TRANSIST OR DC SW * Q§5 25K1824 FET DC SW QB 285C4226(R24) TRANSIST OR RF AMP Q7 2S5C3722K(S) TRANSIST OR RIPPLE FILTER Q8 DTC114EUA TRANSIST OR DC SW @9 25C4226(R24) TRANSIST OR RF AMP Q11 2SB1386(R) TRANSIST OR DC SW Q12 DTC114EUA TRANSIST OR DC SW Q13 25C4093(R27) TRANSIST OR RF AMP Q14 2503357 TRANSIST OR RF AMP Q15 2SK302(Y) FET BUFF Q17 25K1824 FET DC SW Q18 25K1824 FET DC SW Q21 UMCS TRANSIST OR DC SW Q22 2SK1824 FET DC SW Q102 25C4215(Y) TRANSIST OR BUFF Q106 2504215(Y) TRANSIST OR RF AMP Q107 25C4226(R24) TRANSIST OR RF AMP Q108 2504215(Y) TRANSIST OR RF AMP Q109 285C4215(Y) TRANSIST OR RF AMP Q110 UMCS TRANSIST OR DC SW Q112 2S5K1824 FET DC SW Q113 2SK1824 FET DC SW Q114 DTATT4EUA TRANSIST OR DC SW Q115 28C4215(Y) TRANSIST OR RF AMP Q201 25C4215(Y) TRANSIST OR RF AMP 201 25C4215(Y) TRANSIST OR RF AMP Q203 25K1824 FET DC SW @205 2504215(Y) TRANSIST OR RF AMP Q206 2SK1824 FET DC SW @207 DTCTI14EUA TRANSIST OR DC SW 240 25C4215(Y) TRANSIST OR RF AMP Q241 2504215(Y) TRANSIST OR RF AMP @242 2504215(Y) TRANSIST OR RF AMP 301 2S5C4081(R) TRANSIST OR DC AMP ©302 IMHS TRANSIST OR DC SW @304 IMHS TRANSIST OR DC SW @305 DTC114EUA TRANSIST OR DC SW ©306 2SB951A(Q) TRANSIST OR DC AMP @307 FMWI1 TRANSIST OR DC AMP @308 UMCS TRANSIST OR DC SW 309 2SB951A(Q) TRANSIST OR DC AMP Q310 FMW1 TRANSIST OR ~ DC AMP Q311 DTC114EUA TRANSIST OR DC SW Q312 DTC114EUA TRANSIST OR DC SW Q313 DTCI14EUA TRANSIST OR DC SW

FCC 1D:ALH30643110 FCC ID:ALH30643120 FCC ID:ALH30643130 xX55—3060—10SK RX UNIT TKR—840 Al M77K—A DBM DOUBLE BALANCED MIXER D1 155355 DIODE . LOCK DETECT SWITCH D2 1SV283 VARIABLE CAPACITANCE DIODE FREQ.CONT D3 1§Vv283 VARIABLE CAPACITANCE DIODE FREQ.CONT D4 15V283 VARIABLE CAPACITANCE DIODE FREQ.CONT D6 1S5v283 VARIABLE CAPACITANCE DIODE FREQ.CONT D9 1SV283 VARIABLE CAPACITANCE DIODE FREQ.CONT D10 DAN2Z35K DIODE RF SWITCH D11 DAN202U DIODE SQ SWITCH D12 B30—2130—05 LED LOCK DETECT LED D13 B30—2130—05 LED LOCK DETECT LED 1G1 SA7O25DK 1C PLL IC 1C2 NJM78LOSUA IC AVR 1C3 BU4O94BCFV 1C SHIIFT REGISTOR 1C4 TATBO8S IC AVR 1CS NJM2904E 1C DC AMP 1C6 BU4053BCF 1C ANALOG SWITCH 1CG7 TA31137FN 1C FM IF 1C 1C8 TA31137FN IC FM IF 1C 1C9 M6é2364FP 1C D/A CONVERTER(ADJUSTMENT) IG10 AT2408BN10S12.5 1C EEPROM I1C11 NJM4558E 1C AF AMPLIFIER 1C12 NJM4558E I1C AF AMPLIFIER 1C13 NJM7B8LO8UA IC AVR 1C14 NJM2904E 1C DC AMP I1C15 LMX1511 TMX 1C PLL IC 1G16 NJM78L.05UA IC AVR I1C17 NJM7BLO8UA IC AVR 1G18 TC7SBIF 1C AND GATE I1C19 TC74HC14AF IC INVERTER 1C20 AD9835BRU MoOS 1C pos 1C21 NJM7BLOSUA I1G AVR 1022 TC7S66FU 1C ANALOG SWITCH 1C23 TCIS66FU 1C ANALOG SWITCH Q1 28503357 TRANSIST OR RF LOCAL AMP Q3 2503356 TRANSIST OR RF LOCAL AMP Q4 25C4081(R) TRANSIST OR REF. AMP Q5 2503357 TRANSIST OR RF LOCAL AMP Q6 2804226(R24) TRANSIST OR BUFFER AMP Q7 2503357 TRANSIST OR RF AMP QB8 2SK508(K53) FET vco 9 2SK508(K53) FET veo Q10 2SC3722K(S) TRANSIST OR VCO SWITCH Q12 25C3722K(S) TRANSIST OR VCO SWITCH Q13 DTCI14EUA TRANSIST OR VCO SWITCH Q14 2$504226(R24) TRANSIST OR * BUFFER AMP Q15 28C4215(Y) TRANSIST OR REF. AMP Q16 28B1386(R) TRANSIST OR DC SWITCH (NARROW) Q17 2SC3722K(S) TRANSIST OR RIPPLE FILTER Q18 DTC114EUA TRANSIST OR DC SWITCH (NARROW} Q13 BDTCT14EUA TRANSIST OR DC SWITCH (NARROW) @20 2SB1386(R) TRANSIST OR DC SwITCH (WIDE) Q21 2SK508(K53) FET vCo Q22 DTC114EUA TRANSIST OR DC SWITCH (WIDE)

FCC ID:ALH30643110 FCC ID:ALH30643120 FCC ID:ALH30643130 Q23 2804215(Y¥) TRANSIST OR BUFFER AMP Q24 2503357 TRANSIST OR IF AMP Q25 2503357 TRANSIST OR IF AMP Q26 28C4081(R) TRANSIST OR ACTIVE FILTER Q27 28504215(Y) TRANSIST OR BUFFER AMP Q28 25C4081(R) TRANSIST OR SQ AMP @29 DTC114EUA TRANSIST OR SQ SWITCH @30 25CA215(Y) TRANSIST OR BUFFER AMP Q31 2503357 TRANSIST OR IF AMP Q32 2503357 TRANSIST OR IF AMP Q33 25C4215(Y) TRANSIST OR BUFFER AMP Q34 2SJ106(GR) FET SQ SwITCH @35 2SJ106(GR) FET SQ SwiITCH @36 DTC1T14EUA TRANSIST OR SQ SwITCH Q37 DTC1H14EUA TRANSIST OR SQ SWITCH Q38 DTC114EUA TRANSIST OR SQ SWITCH 39 2504081(R) TRANSIST OR BUFFER AMP

FCC ID:ALH30643110 FCC ID:ALH30643120 FCC 1D:ALH30643130 TKR—840 Circuit Description The TKR—840 is a UHF—bandrelay radio unit for business radio applications. It has the following features: ® High—performance model with enhanced basic functions QT and DQT signalling function for waiting 16 signals at the same time e Various remote functions that can be used by base stations e Fine frequency steps using DDS e Signalling encoding and AF processing with DSP e Transmitter Unit The transmitter unit (X56—305 A/3) consists of the following circuits:(1) internal / external reference circuit. (2) transmit reference PLL circuit. (3) transmit DDS circuit. (4) transmit main PLL circuit. (5) driver circuit, (6) modulation level adjustment circuit. and (7) other circuits {1) Theinternal /external reforence eireuit switehes between the internal +/—1.0ppm / 20M1z TCXO (X101) and the 10M Hz external reforence automatically. If there is no external reference input, the internal TCXO is used as the reference frequency. When an external reference (10MHz/ —10dBm or higher) is input . the external reference is automatically used as the reference frequency. The circuit Of @102 .9106. XF210.Q109.D101.0103.015.X101.9205.D0205.@206.1C204.q110.Q114.Q11 2.Q113.Q108.XF211.and Q116. (2) The transmit reference PLL circuit generates the reference frequency signal (19.2MHz) for the transmit DDS and modulates the low—frequency components of QT and DQT . This circuit consists of 1C201,X201,Q20L.and Q202 The signal generated by the VCO is fed to buffer amplifiee Q202 and unwanted harmonic components are removed with a LPF . The resulting signal goes to PLL IC (IC201). and its pbhase is compared with that of the reference using the comperieng frequency of 200kHz. The phase difference signal is converted to a direct current voltage by a laglead type loopfilter. The capacity of D201 and D204 is varied by the direct current voltage to keep the VCO oscillator frequency 19.2MHz . The 19.2MHz oscillatorsignal is fed to Q241 and used as the reference frequency signal for the transmit DDS,

FCC ID:ALH30643110 FCC ID:ALH3064312¢ FCC 1D:ALH30643130 (3) The transmit DDS cireuit produce the reference frequency signal (4.5MH2) for the DDS PLL and modulates the low—frequency components of digital pager modulation. This circuit of 1C241.1C20210C107.1C207.@207.and Q242. The 19.2MHz signal coming from the transmit sub PLL is amplified by Q241 and fed to 1€C202. 1C202 produces the about 4.5MHz reference frequency signal for the transmit main PLL based on 19.2MH7z signal. Since the comparison frequency of the transmit main PLL is 100kHz. the PLL frequencystep is 100kHz. However, fine frequency step. such as 2.5kHz and 1.25kHz. can be used because the DDS output frequency is variable. IC202 can perform binary FSK modulation. Digital pager modulation is implemented by applying low—range modulation to DDS and high—range modulation to the transmit main PLL. There is a two—stage butterworth filter (cutoff frequencty:3.2kHz) consisting of IC102 in the high—range modulation line. The C102 shift inputis delayed by IC107 and IC207 to maintain phase balance between the low and high ranges. (See the level adjustment circuit description.) (4) The transmit main PLL circuit produces the transmit frequency signal and consists of VCO‘s (Q1 and Q2) and a single—chip PLL IC (IC101). When transmitting 450.000MHz to 461.995M1lz for F1 destination. 480.000 to 496.995MHz for F2 destination. and 400.000 to 414.995M1Hz for F3 destination. the Q1 VCO oxcillates. When transmitting 465.000MHz to 480.000MHz for F1 destination. 497.000 to 512.000MHz for F2 destination, and 415.000 to 430.000MHz for F3 destination. the Q1 VCO oscillates. IC101 divides the VCO oscillator signal and the transmit PLL reference signal (4.5MHz) and the phase is compared with the 100kHz comparison frequency. The phase difference signal is converted to a direct current signal with a laglead type loopfilter. The direct current signal is applied to varicap D1,D3.D2.D4 to lock the VCO oscillator frequency with the desired oscillator frequency. At the same time , the direct current signal passes through the IC109 operational amplifier and buffer amplifier, and is output as a voltage (CVT) for monitoring the transmit main PLL lock voltage. (5) The driver circuit amplifiers the transmit frequency signal to the level required for input to the final unit (X66—305 B/3) This circuit consists of high—frequency amplifier Q9.high—frequency switch DT. high—frequency amplifiee Q13 .high — frequency amplifier Q14. and switching elements Q203.Q8.Q10.Q12 and Q11. The transmit signal level input to Q13 is about 0dBm . Since it is amplified by about 150B by Q13.and also amplified by about 8dB by Q14. the outputfrom Q14 becomes

FCC ID:ALH30643110 FCC ID:ALH30643120 FCC ID:ALH30643130 about 200mW. Since it is attenuated according to destination with the R257.R258. and attenuators. the output is 20dBm(about 100mW) at the CN1 drive output connector, (6) The level adjustment circuit adjusts the modulation signal level to provide a prescribed modulation and adjusts transmission power. This circuit consists of 1C105.1C3.1C100.1C102.1C203.1C208. and Q21. IC3 is an electronic volume IC. The signalling frequency change adjustment . signalling modulation balance adjustment. digital pager modulation balance adjustment. maximum sound frequency change. and the reference voltage setting for transmission power adjustment are performed according to data from the CPU using the FPU. IC105 is a modulation signal summing amplifier (A/Z) and a signalling signal amplitude fine—adjustment amplifier (B/2). IC102 is a platter filter for digital pager modulation and has the same characteristic of a two—stage butterworth filter with a cutoff frequency of 3.2kHz . 1C203 is a DC amplifier that amplifies the transmission power reference voltage generated by IC3. Q21 outputs 5V to the final unit as an H/L signal when the transmission power mode is "LOW and outputs OV when the transmission power mode is "HIGIT. (7) In addition . IC106 is an EEPROM. The transmission adjustment data adjusted for each unit is written into the EEPROM. If the unit is installed in anotherset, it is not necessary to adjust it again from the beginning . but only fine—adjustment is necessary for each unit. ICLIC2IC103.1C108 and IC110 are three—pin constant— voltage power supply IC‘s . Each circuit contains its own power IC to maintain isolation between circuits. The final unit (X56—305 B/3) mainly amplifies transmission power to a specified level. This unit consists of the following circuits:; (1) power module. (2) harmonic wave elimination circuit. (3) progressive wave power/ reflected wave power detection circuit. (4) APC circuit. (5) abnormal temperature detection circuit. (6) common mode unwanted radiation prevention circuit and (7) AVR cireait. (1) The power module IC301 is a power module M68732** for portable transceivers. The driver output of the transmit unit passes through an attenuator . Which differs with destinations, and enters an input pin (pin 1:RFI) of power module IC301. The power

FCC ID:ALH30643110 FCC ID:ALH30643120 FCC ID:ALH30643130 module 1C301 amplifies power according to the voltage at the amplification control pin (pin 2:VGG) and output it from the output pin (pin 4:RFO). (2) The harmonic wave elimination circuit uses a three—stage "pi" type Chebyshev type LPF consisting of L301.L302.1L303.0307.0312.C315 and C316. This circuit removes harmonic wave components from the transmission power amplified by the power module and sends the resulting signal to the progressive wave power / reflective power detection circuit. (3) The progressive wave power / reflective wave power detection circuit consists of a CM coupling type detection circuit formed by a strip line and a direct current amplifier IC303(A/2,B/2), which are used in high—power mode . and a capacity coupling double—voltage detection circuit and direct current amplifier 1C0302(A/2). which are used in low—power mode. The transmission power which passes through the strip line is output from CN308. (4) The APC cireuit consists of differential amplificr 1€302 (1B/2). divrect current amplifier Q301. analog switch 1C304 .and switching transistors Q312 and Q313. The high—power / low—power detection values are switched by analog switch IC304. The power setting range in high—power mode is 1 to 5W. The power setting range in low— power mode is 100mW to about 2W. (5) The abnormal temperature detection circuit consists of thermal switch TS301 and digital transistorQ302 . This circuit disable the transmission power amplification function and prevents temperature rise to protect the circuit when the final unit temperature rise excessively (95C or higher) and the circuits cannot be safely operated. (6) Common mode unwanted radiation prevention circuit. The TKR—840 has a filter L304 at the power line inlet in the final unit to reduce common mode unwanted radiation from the power cable. (7) The AVR circuit is designed to provide the power supply voltage required to operate power module IC301. This circuit consists of Q306,9307.0312.9310.@305. and D317.

PUL IU;ALHSUbASLIU FCC ID:ALH30643120 FCC ID:ALH30643130 For continuous operation (100% duty). there are two large—current AVRs with discrete for the power module using low—heat—resistant power transistor 25B951A to prevent concentration of heat. The 8V AVR is controlled by 8T. anda time constant is set at the beginning of output to start transmission power smoothly and prevent band spreading. The receiver unit (X55—306) consists of the following circuits: (1) front—end circuit .(2) narrow IF circuit, (3) wide IF circuit .(4) receiver main PLL circuit. (5) receive sub PLL circuit. (6) receive DDS circuit, (7) base—bandcircuit. and (8) other circuit. (1) The front—end circuit consists of BPF L3. high—frequency amplifier Q7 ,BPF L16. mixer DBM Al. and IF switching circuit D10. The helical BPF covers frequency range F1l: 450.000 to 480.000MHz .F2:480.000 to 512.000MHz.and F3:400.000 to 430.000MHz.and the spread for FL.F2, and F3 is 5.0MHz. The BPF L16 attenuates the unwanted out—of—band high—frequency components produced by high—frequency amplificr Q7 and unwanted components. and sends only the necessary signal to mixer DBM AL . The mixor DBM A1l mixer the first loca) oseillator signal generated by the finst local oscillator PLL with the receive signal coming from the helieal BPF L16 to produce a first IF signal (73.05MH2). The first IF signal is fed to the narrow IF or wide IF circuit by the following D10. (2) The narrow IF circuit operates during narrow—band reception and consists of two— pole MCF XF2, four—pole MCF XF4. IF amplifiee Q25,. IF amplifier Q32, FM detection IC IC7 .ceramic filter CF1.CF3 . The unwanted components of the removed by two—pole MCF XF4 and the resulting signal is amplified by [F amplifier Q25 and Q32. The FM IC IC7 produces the secondIF signal (450kHz) , ceramic filter CFland CF3 remove unwanted components. and an IF amplifier amplifies the signal, and the quadruture detection circuit FM—detects the signal to produce a base—band signal and output it from pin 15. The base—band signal passes through analog switch IC18. inversion amplifier IC16(B/2). Jow—frequency amplifier IC11 (A/Z2 and B/2), and IC11(A/2), and goes to the YO input of multiplexer IC9 and the V2 input of electronic volume 1C9. The level of the signal that enters V2 of the electronic volume IC is adjusted, the signal passes through the hysteresis circuit AF switch Q34, goes to IC7 noise filter input (pin 17) .and high—frequency components are removed by a HPF consisting of external CRs. The signal is noise—detected and compared ,and the noise

PCC ID:ALH30643110 FCC ID:ALH30643120 FCC ID:ALH30643130 squelch signal (N—DET) is fed to DC switch Q36. The voltage signal (RSSH) from the two second IF amplifiers in IC7 are compared with the reference voltage set by + electronic volume V4 by the internal RSSI comparator .and the RSSI squelch signal (C—DET) is output from pin 20 of IC7. C—DET enter DC switch Q37 and is ANDed with the N—DET by DC switch Q38 . A squelch signal (SC) is output from connector CNG. (3) The wide IF circuit consists of two—pole MCF XF1,. four—pole MCF XF3, IF amplifier Q24. IF amplifier Q31. FM detection IC IC8 .ceramic filter CF2,CF4 . The unwanted components of the removed by two—pole MCF XF1 and four—pole MCF XF3 and the resulting signal is amplified by IF amplifier Q24 and Q31. The FM IC IC7 produces the second IF signal (450kHz) . ceramic filter CF2 and CF4 remove unwanted components, and an IF amplifier amplifies the signal, and the quadruture detection circuit FM—detects the signal to produce a base—band signal and output it from pin 15. The base—band signal passes through analog switch ICZ1, inversion amplifier IC15(A/2). low—frequency amplifiee IC12 (A/2). and goes to the Y1 input of multiplexer IC and the V1 input of electronic volume IC9. The level of the signal that enters ¥1 of the electronic volume IC is adjusted. the signal passes through the hysteresis civeuit AF switch Q35. goes to 1CB noise filter input (pin 17) .and bigh— frequency components are removed by a HPF consisting of external CRs. The signal is noise—detected and compared .and the noise squelch signal (N—DET) is fed to DC switch Q36. The voltage signal (RSST) from the two second IF amplifiers in ICS are compared with the reference voltage set by electronic volume V3 by the internal RSSI comparator.and the RSSI squelch signal (C—DET) is output from pin 20 of ICS. C—DET enter DC switch Q37 and is ANDed with the N—DET by DC switch Q38 . and output as a squelch signal (SC) . (4) The receiver main PLL circuit consists of VCOs (Q8.99) and a single—chip PLL IC IC1 .buffer amplifier Q14 ,high—frequency amplifier Q3.Q1.Q5, and Q6. The first local oscillator is an lower heterodyne local oscillator .and the VCO oscillator frequency is F1:376.950 to 406.950MHz.F2:406.950 to 438.950MHz, F3:326.950 to 356.950MHz. In addition .two VCOs cover two bands: The Q8 covers the lower band and the Q9 VOC covers the upper band . PLL IC compares the 4.5MHz signal from the receive DDS circuit and the VCO signal with the 100kHz comparison frequency.

FCC ID:ALH30643110 FCC 1D:ALH30643120 FCC ID:ALH30643130 (5) The receive sub PLL circuit produces a second local oscillator signal for the receiver .and consists of PLL IC IC15 . crystal oscillator X1. oscillator FET Q21 .buffer amplifier Q23 high—frequency amplifier Q15. Q30. Q33. and emitter follower Q27. The VCO cons ts of a erystal oscillator circuit (Q21 and X1) and varicap D9. (6) The receive DDS circuit varies the reference frequency of the receive main PLL to implement fine frequency steps which cannot be achieved by a single—loop PLL. This circuit comprises IC20. Q33. Q39. and CF5. The output frequency is used as the reference frequency for the receive main PLL. (7) The base—band signal circuit consists of HPF Q26,. LPF Q28.D11.and Q29. The base— band signals detected by the narrow FM and wide FM detection circuit de— emphasized by LPF Q28. The sub—audio band components of the signal are removed by HPF Q26 . and the resulting signal is switched with a squelch signal by D11 and 29. and output as an RA signal from CNS. (8) In addition . the receiver circuit contains an EEPROM (IC10) as in the transmitter circuit. Adjustment data for cach unit and the last channel data are written into the EEPROM . 1IC2IC4.IC13.and IC16 are three—pin constant voltage power supply ICs . Q17 is a ripple filter for the power supplied to the first local oscillator PLL VCO . 1C3 is a shift register. Q16.Q18.Q19,Q@20.and Q22 are switching transistors. Control Circuit The control unit (X53—388) consists of the following circuit : (1) main CPU ,(2) sub CPU,(3) DSP circuit, (4) AF PA circuit .(5) display circuit .(6) base—band circuit .(7) Microphone AGC circuit. (8) RS—232C circuit . (9) power supply circuit. (1) The main CPU (IC17) is a 16bit single—chip microcomputer containing a 128k ROM and 5k RAM. This CPU controls the siub CPU .the flash ROM , and the DSP . encodes high—speed and low—speed data. controls the transmitter unit. The receiver unit, the control unit. and the display circuit and transfers data to or from an external device.

FCC ID:ALH30643110 FCC ID:ALH30643120 FCC ID:ALH30643130 (2) The sub CPU (IC18) is of the same type as the main CPU. but is programmed so that it operate as the sub CPU by connecting its pin 18 to GND (pin 18 of the main CPU is connected to Vdd). The sub CPU mainly function as an VO expander . and controls the flash ROM . DSP. and extended 1/O. (3) The DSP circuit filters transmit / receive audio signal and decodes signalling (QT.DQT). This circuit consists of 1C30.1024.1C27.1C22.1C31.1C34. and I1C25. The receive signal DET is converted from ‘analog to digital by IC27 with a sampling frequency of 16.128kHz. The digitized audio signal is sent to DSP IC30 to process the signalling signal and audio signal. The processed digital audio signal is fed to cordec IC27 . converted from digital to analog. and the analog signal is output from pin (VoutR). Then .the audio signal is amplified by 1C34 (ICB/2). passes through the 1C34 (A/2) low—pass filter .and goes to multiplexer IC37. The transmit audio signal coming from pin 13 of 1029 is amplified by 1C22 (B/2), fed to pin 6 (VinR) of cordec 1C27. and converted from analog to digital at a sampling frequency of 16.128kHz . The digitized transmit audio signal is AGC—processed. pre—emphasizedand filtered at 300Hz to 3kHz by DSP 1030 . and the resulting signal is fed back to cordee IC27. and converted from digital to analog. and the analog signal is output from pin 15 (VoutL). The transmit signal from VoutL is amplified by IC34 (B/2), passes through the 1034 (A/2) low—pass filter, and goes to the IC12 (A/2) summing amplifier. 1C25 is a counter IC and the clock required for the cordec and DSPis generated by dividing the 16.515MHz clock signal produced by DSP 1C30. (4) The AF PA circuit is an AF amplifier for driving speakers to monitor receive audio signal. This cireuit consists of IC45. The 4W audiooutput can be provided to external speaker by supplying power supply voltage 13.8V/4 ohms through the 15— pin test connector "SPO.SPG® on the rear panel. The output impedance of the internal speaker is adjusted to provide an audio output of about 0.2W when the internal speaker installed on this model front panel is used. (5) The display circuit contains T—segment LED D700,D701 (orange: see the operation manual for details of display) DTO3 (green: cireuit power supply). D7O4 (red: transmission). D705 (green: busy), two—color LED D702 (green: internal: red external reference state ). LEDs in switches $700 to $705,1C700.1C701.1€702 and

FCC ID:ALH30643110 FCC ID:ALH30643120 FCC ID:ALH30643130 IC703 to display this model channels and states. 1C700 to 1C703 are shift registers which convert serial data from the CPU to parallel data and light LEDs . Q706.q9707.q9708.9709.and Q710 are switching transistors which control two—color LED D702. 1C704,1C705. and 1C706 are three—pin power supply ICs which produce power used for the display circuit. (6) The base—band circuit switches between the modulation signal to the transmitter unit. demodulation signal from the receiver unit. and remote audio and adjusts their levels. This circuit consists of 1C12.1C13.1C14.1C29.1C32.1C33.1C36. and I1C4O. Modulation inputs include local microphone input. repeat audio input (RTA). low— speed data (LSD). high—speed data (HSD), external audio input (TA) . external data input (TD), and remote modulation input (RTA), and demodulation outputs include receive audio output (RA). receive data output (RD). and remote receive audio (RRA). The multiplexer (IC14.1C29.1C37) changes signals. the electronic volume (IC33) adjusts the level . and the operational amplifiee (IC12IC13.1C32.1C36.1C42) amplifier and sums signals. (7) The microphone AQGC circuit AGC—amplifies an audio signal coming from a local microphone so that it dose not saturates. This cireuit consists of 1C23 D707.10709,0700. and D701. The AGC is operated by controlling the + and —side levels of amplitude using the current obtained by positive and negative detection of the amplified audio signal. (8) The RS—232C circuit connects the RS—232C serial port of a personal computer directly to this model to perform FPU operation. The FPU operation can also be performed by connecting a programming cable (KPG—46) to the local microphone on the front panel. But . if the D—sub connector on the rear panel is used. the programming cable is not required. The 232C driver IC (IC14) changes the TTL— 232C level . The FPU (KPG—47D) has a new transmitter / receiver circuit monitor function (fransmission: transmission progressive power display. transmission reflective power display. transmit main PLL lock voltage display: reception :RSSI display . receive main PLL lock voltage display). Data requiredfor this function is also transferred through the RS—232C serial port. The firmware can only be rewritten with the local microphone on the front panel.

FCC 1D:ALH30643110 FCC ID:ALH30613120 FCC ID:ALH30643130 (9) The power supplycircuit generates power to operate the CPU .DSP .flash ROM. bi— directional buffer. and base—band circuit . this circuit consists of IC3.IC4.1C5. and 1C6.

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Document Created: 2001-06-07 13:42:35
Document Modified: 2001-06-07 13:42:35
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