Motorola Gp328 Gp338 Detailed 6804110j64 F Manual
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Frequency Generation Circuitry6C-95.1 Synthesizer(Refer toUHF Band 2 Synthesizer Schematic Diagramon page 6C-18) The Fractional-N Synthesizer uses a 16.8MHz crystal (FL201) to provide a reference for the system. The LVFractN IC (U201) further divides this to 2.1MHz, 2.225MHz, and 2.4MHz as reference frequencies. Together with C206, C207, C208, R204 and CR203 , they build up the reference oscillator which is capable of 2.5ppm stability over temperatures of -30 to 85°C. It also provides 16.8MHz at pin 19 of U201 to be used by ASFIC and LVZIF. The loop filter which consist of C231, C232, C233, R231, R232 and R233 provides the necessary dc steering voltage for the VCO and determines the amount of noise and spur passing through . In achieving fast locking for the synthesizer, an internal adapt charge pump provides higher current at pin 45 of U201 to put synthesizer within the lock range. The required frequency is then locked by normal mode charge pump at pin 43 . Both the normal and adapt charge pumps get their supply from the capacitive voltage multiplier which is made up of C258, C259, C228, triple diode CR201 and level shifters U210 and U211. Two 3.3V square waves ( 180 deg out of phase) are first shifted to 5V, then along with regulated 5V , put through arrays of diodes and capacitors to build up 13.3V at pin 47 of U201. Figure 6-4Synthesizer Block DiagramDATA CLK CEX MODIN VCC,DC5V XTAL1 XTAL2 WARP PREIN VCPREFERENCE OSCILLATORVOLTAGE MULTIPLIERVOLTAGE CONTROLLED OSCILLATOR2-POLE LOOP FILTERDATA (U409 PIN 100) CLOCK (U409 PIN 1) CSX (U409 PIN 2) MOD IN (U404 PIN 40) +5V (U247 PIN 4)7 8 9 10 13, 30 23 24 25 32 47 VMULT2 VMULT1BIAS1 SFOUTAUX3 AUX4 IADAPTIOUTGND FREFOUTLOCK4 19 6, 22, 23, 24 43 45 3 2 28 14 1540FILTERED 5VSTEERING LINE LOCK (U409 PIN 56) PRESCALER INLO RF INJECTION TX RF INJECTION (1ST STAGE OF PA) FREF (U201 PIN 21 & U404 PIN 34)39 BIAS241DUAL TRANSISDUAL TRANSIS-485VR5 5, 20, 34, 36 (U248 PIN 5) AUX1 VDD,3.3VMODOUT U251 LOW VOLTAGE FRACTIONAL-N SYNTHESIZERTORSTORS
6C-10Frequency Generation Circuitry5.2 VCO - Voltage Controlled Oscillator(Refer toUHF Band 2 Voltage Controlled Oscillator Schematic Diagramon page 6C-19) Figure 6-5VCO Block Diagram The VCOBIC (U241) in conjunction with the Fractional-N synthesizer (U201) generates RF in both the receive and the transmit modes of operation. The TRB line (U241 pin 19) determines which oscillator and buffer will be enabled. A sample of the RF signal from the enabled oscillator is routed from U241 pin 12, through a low pass filter, to the prescaler input (U201 pin 32). After frequency comparison in the synthesizer, a resultant CONTROL VOLTAGE is received at the VCO. This voltage is a DC voltage between 3.5V and 9.5V when the PLL is locked on frequency.Presc RX TXMatching NetworkLow Pass Filter Attenuator Pin8 Pin14 Pin10 Level Shifter Network5V (U201 Pin28) VCC Buffers TX RF Injection U201 Pin 32AUX4 (U201 Pin3)AUX3 (U201 Pin2) Prescaler Out Pin 12 Pin 19 Pin 20TX/RX/BS Switching Network U241 VCOBIC Rx Active Bias Tx Active Bias Pin2 Rx-I adjustPin1 Tx-I adjustPins 9,11,17 Pin18Vsens Circuit Pin15Pin16 RX VCO Circuit TX VCO Circuit RX Tank TX TankPin7 Vcc-Superfilter Collector/RF in Pin4 Pin5 Pin6RX TX(U201 Pin28)Rx-SW Tx-SW Vcc-Logic (U201 Pin28) Ste er Line Volta ge (VCTRL)Pin13 Pin3TRB_IN LO RF INJECTIONVSFVSF VSF
Frequency Generation Circuitry6C-11The VCOBIC(U241) is operated at 4.54 V (VSF) and Fractional-N synthesizer (U201) at 3.3V. This difference in operating voltage requires a level shifter consisting of Q260 and Q261 on the TRB line. The operation logic is shown in Table 6-1. In the receive mode, U241 pin 19 is low or grounded. This activates the receive VCO by enabling the receive oscillator and the receive buffer of U241. The RF signal at U241 pin 8 is run through a matching network. The resulting RF signal is the LO RF INJECTION and it is applied to the mixer at T302 (refer toUHF Band 2 Receiver Front End Schematic Diagramon page 6C-16). During the transmit condition, when PTT is depressed, five volts is applied to U241 pin 19. This activates the transmit VCO by enabling the transmit oscillator and the transmit buffer of U241. The RF signal at U241 pin 10 is injected into the input of the PA module (U101 pin16). This RF signal is the TX RF INJECTION. Also in transmit mode, the audio signal to be frequency modulated onto the carrier is received through the U201 pin 41. When a high impedance is applied to U241 pin19, the VCO is operating in BATTERY SAVER mode. In this case, both the receive and transmit oscillators as well as the receive transmit and prescaler buffer are turned off.Table 6-1: Level Shifter LogicDesired ModeAUX 4 AUX 3 TRBTxLowHigh (@3.2V)High (@4.8V) Rx High Low LowBattery SaverLowLowHi-Z/Float (@2.5V)
6C-12 Notes For All Schematics and Circuit Boards6.0 Notes For All Schematics and Circuit Boards* Component is frequency sensitive. Refer to the Electrical Parts List for value and usage. 1.Unless otherwise stated, resistances are in Ohms (k = 1000), and capacitances are in picofarads (pF) or microfarads (µF). 2.DC voltages are measured from point indicated to chassis ground using a Motorola DC multime- ter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading. 3.Reference Designators are assigned in the following manner: 100 Series = Transmitter 200 Series = Frequency Generation 300 Series = Receiver 400/500 Series = Controller 600 Series = Keypad Board 4.Interconnect Tie Point Legend: UNSWB+ = Unswitch Battery Voltage (7.5V) SWB+ = Switch Battery Voltage (7.5V) R5 = Receiver Five Volts CLK = Clock Vdda = Regulated 3.3 Volts (for analog) Vddd = Regulated 3.3 Volts (for digital) CSX = Chip Select Line (not for LVZIF) SYN = Synthesizer DACRX = Digital to Analog Voltage (For Receiver Front End Filter) VSF = Voltage Super Filtered (5 volts) VR = Voltage Regulator 6-LAYER CIRCUIT BOARD DETAIL VIEWING COPPER STEPS IN PROPER LAYER SEQUENCELAYER 1 (L1) LAYER 2 (L2) LAYER 3 (L3) LAYER 4 (L4) LAYER 5 (L5) LAYER 6 (L6)INNER LAYERS SIDE 1 SIDE 2
Circuit Board/Schematic Diagrams and Parts List6C-137.0 Circuit Board/Schematic Diagrams and Parts List ZMY0130185-A 1 40 J400 C443 C444 C471 C472C473 L401R435 RT400 TP401 TP402 TP410 VR447 VR449C441C490 C491 C492C493 C494 C495 C496C497 D403 2220 1 21 J403 L400 4 3 Q417 R421 R450R477 TP405TP406 TP415VR434 VR450 C400 C401 C402 C403 C467 C480C482 CR440 D401 Q400 Q403 4 3 Q405 R401 R402 R403R405 R406 R407R416R427 R446 R447 R448 R476R481 SH401 4 58U400 C423 C424 C425 C426 C427 C428C429 E407 E408 E409 R408 R410 R418 R428 R429 R437 R478 R492 SH400 22 21 8 71 U40532 17 16 1U406 1 4 5 8 U407 B503 B504 C216 C432 6 431 FL201 PB502 PB503 TP201 C203 C210 C211 C212 C213 C214C217C220 C228 C229 C230 C233C235 C238 C257C260 C282 C283 C291C292 C294 C297 CR201 L201 L202 L203 L232 4 3 Q210 4 3 Q260 R206 R255 R256 SH201 TP202TP302 U247 C247C248 C251 C253 C271 C272 C273 C276C285 C286C289 C370 C374C386 3 L243 3 L253 L271L273L282L321 Q241 4 3 Q261 R243 R248 R253R260 R333R339 SH241C109 C110 C 111 C112 C113 C114 C115 C116 C117C118 C119 C120 C121 C122C125C127 C129 C131 C160 C161 C165 C166 C169 C171 C180 C181 L106 L107 L108L109 L113 L114L115 L117 L160 12 3 Q110R104R106R107 R108 R120 R161 R171 R173 R174 SH101 1 16 8 9U101 C319 C320 C322 C375 C381L309L310 R308 R309R310 R348 SH303 6 4 3 T30164 3 T302C323C324 C325 FL301L311 R351 R352 SH323 C328 C391 C397 PB504 Q315 Q316R300 R314 R316 R318 R319 R325 R326 R327 R334 R335 R338 RT300 RT301 VR300VR444 C331 C333 C396 CR308 R317 R336 R342 C101 C102C103 C104 C106C107C188CR101 CR102 L101 L102 L104 L105SH100C301 C302C303 C304 C305 C308 CR301 CR302 L301 L302 R301 R302 SH301 C349 C350 C351 C352C353 C354 C362C363 C364 C384C385 CR310 L325 L332 Q320 R320R321 R322 R324 R345 R346R355 SH321C521PB501 VR440 C140 C141C520 L116 PB505 VR443C511 C512C513 C514 4 3 2 CR503 Q502 Q505 R501 R502 R505C502 C505 R506 R507 VR501 UHF Band 2 (450-527MHz) Main Board Top Side PCB No. 8485641Z02 http://www.myradio168.name
6C-14Circuit Board/Schematic Diagrams and Parts List 4 5 3 2 S502 2 C 8 C 4S501C329 C334 C336 C337C344 C345 C347C348 C355 C356C360 C361 C382L314 L331R343 R350 1 37 25 13 U301 C339 C340 C341 C342C343 C346C357C358C359 C383 C390 R344 SH322 SH302 2 34 1 J101 J102 C108 P100 43 Q111R101 R170 C132 C172 C173 CR105 H101 R133R172R102 R130 R131C105C123 C126C128 C130 C133 C135 C138C150 C151C152 C170 C174 E101 L112 R109 R132 R329 1 179 25U102 VR439 C134 C307 R328R340 C306 C309 C310 C311 C312 C313 C314 C315 C316C317 C318 C321C380 C395 CR303 CR304 CR305 L303 L304 L305L306 L307 L340 Q301 R303 R304 R305 R306 R307 R3471 2 3 B501 C503 F501 C326 C327C330 C338L330 Q302R311 R312 R313R315 CR306SH3042 3 4 Y201 C215 C277 C278 C279 C522C523 L505 R205 U248 VR441VR442 VR506 CR501C201 C202C204 C206 C207C208 C218 C219C223 C224 C231 C232 C234C258 C259 C263 C264 C265 C293 C296 C298 CR203 L261 R201 R202R204 R231 R232 R233R281 SH202 1 3725 13 U201 4 3 U210 4 3 U211 C241 C242 C243C244 C245 C246 C250C252 C254 C255 C281 C295C371 C372 C373 C378CR241 CR242 CR243 CR251 L241 L242 L251 L281 Q310 R110 R111 R112R241 R242R244 R245 R251 R252 R254 R330 R331 R332 R349SH242 111 20 10 U241C431 C433 C435 C436 C437 D402 3FL401 Q416R414 R415 R419 R420R426 R460 R462 R463 C453 C456 L411 R409 R411 R432R457 R461 SH402 1 765126 U409 C434 U410 C449 C458 C459C463C466 E400E401E402E403E404 E405 E406 L410 C407 C408 C409 C410 C411 C414 C415 C416C419 C420C421 C422 C430 C440 C447C448 C450 C451C452 C475 C476 C479 C481 43Q410 R400 R413 R423 R424 R425 R431 R434 R436R445 R449 R471 R472 R475 1 3725 13 U40411 1 20 10 U420 SH403C442 C445 R473 VR432 VR433 VR445 VR446 VR448 ZMY0130184-B UHF Band 2 (450-527MHz) Main Board Bottom Side PCB No. 8485641Z02 http://www.myradio168.name
Circuit Board/Schematic Diagrams and Parts List6C-15 DEMOD LVZIF_SEL RSSI 16.8MHzCLK DACRx DATA Vdda Vdda RX_IN RX_INJR5 RECEIVER DATA CLK DACRX DEMOD RSSI LVZIF_SEL 16.8MHz RX_INJSWB+ TX_INJ Vdda FGU 16.8MHz 4V_3.3V 5V CLK CSX DATA LOCK MODIN R5 CSX 4V_3.3VSWB+ LOCK MODIN 5V DATA RESET RX_IN TX_INJ UNSWB+ TRANSMITTER 5V CLK CSX 5V UNSWB+ RESETB503 B504 LI_ION C505 100pFR507 0 C502 0.47uF VR5016.8V1 5 HIGH32SWITCH S502 4 LOW Vdda VOLMECH_SWB+ 100pFC503VR506 6.8V 10V VR439L505 390nH 24V 2 1F501 2CR501 1BATT_CODE UNSWB+ BATT – BATT + RADIO_CODEBATTERY_CONTACT CONN_JB5012 DATA 1 NEG 3 POS PB501 1 2SWITCH .01uFC521 6.8V VR440 SB1 1 2PB502 SWITCH C522 .01uFVR441 6.8V PB503 SB2 C523 .01uF6.8V VR442 SWITCH PB504 1 21 2SWITCH VR444 6.8V PTT SB3 6.8V VR4431 2SWITCH PB505 .01uFC520 EMER 47K R506 Q505R505 10K Vdda GREEN_LED IMX1 5 1 6 24 3 SWB+ RED_LEDQ502 680 R501 180 R502 4 13 CR503 2 RTA0 RTA1 RTA2 RTA3 100pFC514 100pFC513 100pFC511 100pFC512SWITCH S501 GND GND1PC3 PC2 C0 C1 PC0 PC1 8 4 C0 C11 2 79 UHF Band 2 Controls And Switches Schematic Diagram http://www.myradio168.name
6C-16Circuit Board/Schematic Diagrams and Parts List L340 390nHHSMP3820 1 23 CR308 R317 1K 100pFC395 C331 100pF 1K R347 R5 C311100K R307 R306 100K CR304 C306 CR305 C312 7.5pF 12nHL305 C313 11pFL306 11.03nH 11.03nHL307 4.3pF C316 NUNU R305 470 R304 12K C321 100pF C309 100pF R303 1.5K Q301 13 2 C307 0.1uF0.1uF C314 180nHL304C315 100pF C310 0.1uF R328 2.7 L303 22nHR340 8.2K 11.03nHL302C308 100pF 100KR301 12pF C302C305 8.2pF CR301 CR302 4.3pF C303 11pF C304 R302 L301100K 11.03nH1 CR303 23 C301 8.2pF RX_IN 1 SH304 SHIELD 1SHIELDSH302 1 SHIELDSH301 SH303 SHIELD 1 RXFE Top Shield RXFE Bottom Shield Mixer Shield RX Mixer Diode Shield.01uFC380 100K R342 R5DACRx 4.7pFC381 R329 0 C318 11pF C3177.5pFT301 4 6 3 1 2 XFMR TP302T302 XFMR 4 6 3 1 2 C320 C319 7.5pF 3.6pF16.28nHL309 R348 3.6K R336 C333 R5 NU NU 33K R327R316 91K Q315 1 3 2 18K R318 R319 150C396 NU R300 2.2K 0.47pF C397 1 33.0K RT300 2 R334 Q3161 3 2 VR300 R326NU NU NU NUR325 6.8KR338R335 RT301 21 C391NU NU NU NU R5 C370 100pF R330 RSSI RX_INJ NUR331C372 Q310 13 2 C371 100pFC386 NU NU NU NU0 R349 100pFC374 C378 C373 NU NU C375 VCOBUF 100pF R332L321 0 R339 R5 NU NUR333 NUR309 18 82pF C322 L310 150nH 270 R308 270 R310 23 4 1 CR306 IF [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] 1.850V@-50dBm 0.508V [email protected] [email protected] Rx1 = [email protected] rf signal Rx2 = [email protected] rf signal probed using high impedence probe UHF Band 2 Receiver Front End Schematic Diagram http://www.myradio168.name
Circuit Board/Schematic Diagrams and Parts List6C-17 TESTDVAG VAG_REF VPP RED_VCC RED_VSS ROSE_VCC ROSE_VSS RSSI_FLT RSSI_OUT TESTA IOUT LIM MIX_BYP MIX_INMLPD_CR PHASE_LOCK PREAMP_OUT PRE_AGC PRE_IN EMIT EXTBS FREF GND GOLD_VCCGOLD_VSS GREEN_VCC GREEN_VSS C4M C4P CEX CLK COL DATA DEMOD_HF DEMOD_OUT BROWN_VCCBRP_OFF C1M C1P C2M C2P C3M C3P AFC BASE BLUE_VCC BLUE_VSS U301 32D83 16 15 24 21 20 14 19 18 13 17 22 23 32 25 30 29 31 26 36 28 27 33 34 35 42 46 47 48 41 43 37 40 39 38 45 44 8 9 3 1 2 5 4 116 107 12 0.1uFC336C356 .022uF L314 2.2uHC341 1uF C339 1uF C337 100pFC340 1uF 1uF C342 Vdd_FILTERED R5 C355 0.33uF 100pF C327C328 0.1uF 2.4K R312C338 C33015pF 10pF R314 3303K R313 30K R311C326 .01uF Q302 R351 0 3.3K R352 12K R315 680nHL330 .01uFC325 C323 150pF 20pF C324 750nH L311 GND2 4 GND3 5OUT3 IN 6TBD XTAL FL301 GND 1 GND1 2 IF 10uF C382 C348 0.1uF 0.1uFC3292.20uHL331 R343 10 0.1uFC344 Vdd_FILTERED (SOURCE) C343 0.22uF0.1uF C347 0.1uFC346 Vdda .022uFC334 DB 0.1uF C359 1200pFC358R344 12K C383 100pF 0.22uFC357 16.8MHzVdd_FILTERED CLK DATA LVZIF_SEL C350 330pFC349 .022uF 2K R324 C351 20pFBFQ67WQ320 1 3 2 12pF C3520 R355 43pF C353 C362 .022uF56pF 100nH L332 C385 .01uFC364CR310 R320 1K R321 2.4K C363 2.2uF2.20uH L325R346 56K 200K R322 C354 47pF 100pFC390 100KR350 0.1uFC345 DEMOD DA C361 10nFC360 .022uF RSSI SH322 SHIELD 1 SH323 SHIELD 1SH321 SHIELD 1 CRYSTAL FILTER SHIELD LVZIF TOP SHIELD LVZIF BTM SHIELDC384 56pF 10K R345 [email protected] [email protected] 0.706V 2.683V 3.185V 2.628V 2.095V UHF Band 2 Receiver Back End Schematic Diagram http://www.myradio168.name
6C-18Circuit Board/Schematic Diagrams and Parts List VMULT3 VMULT4 WARP XTAL1 XTAL2 SFOUTTEST1 TEST2 VMULT1 VMULT2 INDMULTIOUT LOCK MODOUT FREFOUT IADAPTAUX1 AUX2 AUX3 AUX4 ADAPTSWPD_GND PRE_GND DGND AGND SFCAP SFIN VBPASS PREIN PVREF REFSEL SFBASE MODIN NC1 NC2 NC3 CCOMP CEXCLK DATA BIAS1 BIAS2 VRO VCP PD_VDD PRE_VDD DVDDAVDD 14 12 11 25 23 24 28 37 38 15 16 43 4 41 19 45 48 1 2 3 46 13 47 5 34 36 20 26 30 21 32 35 18 27 10 17 29 319 8 7 40 39 42 44 336 22 63A27U201 C204 2.2uF C264 100pF C263 0.75pF C214 100pF 100pFC211 R201 R202 100K82K DATA 100pFC212 C210 100pF L261 39nHMODIN CLK CSX PRESC C202 1000pF 100pFC201 VSF TP201 1 330pFC206 R281 4.7uFC203 C207 56pF NU NUNU R205C215 FADJ2 GND 4 OUT 3 VDD1 5V C216OSC_16.8MHZY201 NU NUNU R206SYNTHESIZER TOP SHIELD SYNTHESIZER BOTTOM SHIELD SHIELDSH201 SHIELDSH202 L232 12uH 47K R204 CR203C238 470pF 1.6pFC208 1 GND GND1 4OUT3 IN 6FL201 75Z04 100pFC260 100pFC213 5V LOCK AUX4 AUX3 4.3K R255 30 R256 Q210 2 4 1 3 R5 16.8MHz 10K 47K4.7K 47K120 R232 620 R231 0.1uFC233 560 R233 C231 0.1uFC234 0.47uFC232 .047uFTP202 1 MODOUT 100pFC277 2.2uF C278 4V_3.3V C279 2.2uF 100pFC220GND 2 NC43ON_OFF* VIN1VOUT5 U248 LP2980 C294 100pF 0.47uFC293 VddaSWB+ 2.2uFC235 C223 0.1uF C224 0.1uFL201 2.2uH L203 2.2uH 0.47uFC291 C218 0.1uF C217 2.2uF 4OUT3 SD ADP3300U247 6ERR1 GND 5 IN 2NR 0.22uFC219L202 2.2uH 0.1uFC298C292 0.1uF 5V (SOURCE) C282 C2833 K3 CR201 A16 A25 A34 K1 1 2 K2 NU NU C229 1000pF 100pFC230.01uF C258 C228 4.7uF C259 .01uF TC7ST04FUU210 3 GND 2 1 NC4 5 VCC0.1uF C296 5 VCC TC7ST04FUU211 3 GND 2 1 NC4C257 100pF C265 NU VCTRL 1.65V Low (mV) High (3.3V) High (3.3V) 1.5V 2.3V 3.3V 7.5V 3.3V 3.5V@450MHz 9.5V@527MHz Rx 3.7V 1.6VTx 1.6V 3.7V 39 Bias2 40 Bias1 UHF Band 2 Synthesizer Schematic Diagram http://www.myradio168.name