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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...