background image

http://cxema.ru

5

RECEIVER

5.1

Introduction

This section provides a technical description of the receiver section of the RF circuit. A circuit diagram of the whole
system is provided in Section 8 of the Service Manual (Order No. MCUK980101C8).

5.1.1 Downlink Frequencies

CHANNEL

NUMBERS

DOWNLINK FREQUENCIES (MHz)

1-5

6-10

11-15
16-20
21-25

935.200
936.200
937.200
938.200
939.200

935.400
936.400
937.400
938.400
939.400

935.600
936.600
937.600
938.600
939.600

935.800
936.800
937.800
938.800
939.800

936.000
937.000
938.000
939.000
940.000

26-30
31-35
36-40
41-45
46-50

940.200
941.200
942.200
943.200
944.200

940.400
941.400
942.400
943.400
944.400

940.600
941.600
942.600
943.600
944.600

940.800
941.800
942.800
943.800
944.800

941.000
942.000
943.000
944.000
945.000

51-55
56-60
61-65
66-70
71-75

945.200
946.200
947.200
948.200
949.200

945.400
946.400
947.400
948.400
949.400

945.600
946.600
947.600
948.600
949.600

945.800
946.800
947.800
948.800
949.800

946.000
947.000
948.000
949.000
950.000

76-80
81-85
86-90
91-95

96-100

950.200
951.200
952.200
953.200
954.200

950.400
951.400
952.400
953.400
954.400

950.600
951.600
952.600
953.600
954.600

950.800
951.800
952.800
953.800
954.800

951.000
952.000
953.000
954.000
955.000

101-105
106-110
111-115
116-120
121-124

955.200
956.200
957.200
958.200
959.200

955.400
956.400
957.400
958.400
959.400

955.600

956.600
957.600
958.600
959.600

955.800
956.800
957.800
958.800
959.800

956.000
957.000
958.000
959.000

MCUK980101G8

Section 5

Issue 1

Technical Guide

5 - 1

Revision 0

RECEIVER

Summary of Contents for G600

Page 1: ...xema ru Order Number MCUK980101G8 Technical Guide G600 Personal Cellular Telephone Handheld portable EB G600 Car mount kit EB HF600Z Easy fit car mount kit EB HF600Z Dual charger EB CR600 Issue 1 Revi...

Page 2: ...or inaccuracies that may occur and reserves the right to make changes to specification or design without prior notice The information contained in this manual and all rights in any designs disclosed t...

Page 3: ...TRANSMITTER 4 1 Introduction 4 1 4 2 Functional Description 4 2 5 RECEIVER 5 1 Introduction 5 1 5 2 Functional Description 5 2 6 BASEBAND OVERVIEW 6 1 Introduction 6 1 6 2 Functional Description 6 1 7...

Page 4: ...ions A working area where ESDs may be safely handled without undue risk of damage from electrostatic discharge must be available The area must be equipped as follows Working Surfaces All working surfa...

Page 5: ...ephone system are provided in the associated Service Manual 1 2 Structure of the Guide The guide is structured to provide service engineering personnel with the following technical information on the...

Page 6: ...d Local Frequency control signal TSPACT 4 of GEMINI L RX 8 MON slot H TX slot 10 BUZZ Buzzer control signal BUZZIN of Charge IC 11 BUZZ Buzzer control signal REGFB of Charge IC 6V MAX 12 SIM RST SIM I...

Page 7: ...O 4 of GEMINI H Ignition On L Hi Z Ignition Off 33 SERIAL_DOWN Serial Interface Downlink GEMINI USART 8251 8 bit Even 1 stop 34 nLOGIC_PWR H H power sense signal for Optional equipment LOGIC_PWR lO 1...

Page 8: ...6 of GEMINI H TX PL5 1 L TX PL12 19 54 VBAT Battery Power Supply BAT VOLT ADIN1 10bitAD Li ION 7 2V Ni MH 4 8V 55 DCOUT 3 5V DC DC output power supply 3 44V 5 56 D5V 5 0V DC DC output power supply fo...

Page 9: ...ut UART up 9600 33 8kbps 7 SERIAL_DOWN Output UART down 9600 33 8kbps 8 EXT_PWR Input Power for charging 9 GND Digital signal power supply ground 10 RX_AUDIO Output RX audio signal analogue 11 nRADIO_...

Page 10: ...e BATT Battery positive BATT Battery negative S SENSE Battery Type Sensor SIM Interface PIN SIGNAL 1 GND 2 5V 3 Not connected 4 Reset 5 Serial input output 6 Clock 7 Not connected 8 Not connected MCUK...

Page 11: ...pin 62 414 TRST U402 pin 24 415 TCK U402 pin 64 416 TMS U402 pin 61 420 VIB_ON 421 TEST 1 U402 pin 69 422 TEST 2 U402 pin 68 423 TEST 3 U402 pin 67 424 BL_VB_ON 425 CHARGE_LED 426 POLEOUT U503 pin 18...

Page 12: ...MP 447 nADP_SENSE 448 nHF_SENSE 449 nON_HOOK 450 nLOGIC_POWER 451 IGNITION 452 SERIAL_UP 453 BATID 454 nHF_ON 455 SERIAL_DOWN 456 CHARGE_ON 457 KBC 0 458 KBC 1 459 KBC 2 460 KBC 3 461 KBC 4 462 KBR 4...

Page 13: ...70 PARAMP 501 BUZON U501 pin 19 502 REGF8 U501 pin 15 503 nLV3 504 nRESET 505 BUZZER 506 PAGING_LED 507 EXT_PWR 508 VDD 510 VBAT 512 D5V 513 DC_OUT 514 D3V 516 A3V Issue 1 Section 2 MCUK980101G8 Revis...

Page 14: ...11 BUZZ 13 PARAMP 15 TX_ON 16 PA_ON 17 LO_EN 18 RX_ON1 19 RX_ON2 20 nRADIO_MUTE 21 VIB_ON 22 nON_HOOK 24 BATTERY 25 DC_OUT 27 EXT_PWR 28 V_VIB 30 CKL3MI 31 SERIAL_UP 32 IGNITION 33 SERIAL_DOWN 34 nLOG...

Page 15: ...9 DLQP 40 DLIN 41 DLIP 43 BCAL 44 IFAGCEN 45 PLL_STR 46 PLL_SD 47 PLL_CLK 49 ULQN 50 ULQP 51 ULIN 52 ULIP 53 PLL_CONT 60 AFC E901 E908 GND Issue 1 Section 2 MCUK980101G8 Revision 0 2 10 Technical Guid...

Page 16: ...ransmit Tx and receive Rx IC s RF IF dual PLL and the antenna subsystem Figure 1 RF Block Diagram 600 0301 3 2 1 Functional Description of the PLL s The G600 design employs two fixed IF LO s 201MHz fo...

Page 17: ...899 600 895 800 896 800 897 800 898 800 899 800 896 000 897 000 898 000 899 000 900 000 51 55 56 60 61 65 66 70 71 75 900 200 901 200 902 200 903 200 904 200 900 400 901 400 902 400 903 400 904 400 90...

Page 18: ...e PA amplifies the output from the PA driver to any required level up to PL5 33dBm at the antenna The power level can be controlled as required in Phase II GSM in 2dB steps from 33dBm to 9dBm To achie...

Page 19: ...the transmitter IC are given below Figure 2 Typical Losses 600 0402 MCUK980101G8 Section 4 Issue 1 Technical Guide 4 3 Revision 0 TRANSMITTER FL101 U103 FL102 U104 PA Coupler LPF FL104 2 5dB 21 5dB 2...

Page 20: ...00 943 600 944 600 940 800 941 800 942 800 943 800 944 800 941 000 942 000 943 000 944 000 945 000 51 55 56 60 61 65 66 70 71 75 945 200 946 200 947 200 948 200 949 200 945 400 946 400 947 400 948 400...

Page 21: ...put from the LNA goes through a differential BP SAW filter and is differentially fed into the 1st down converter mixer The LO for the mixer is generated by a PLL U304 employing a modular VCO U305 The...

Page 22: ...levels through the receiver IC are given below Figure 2 Nominal and Worst Case Signal Levels 600 0502 102 0 105 2 90 2 94 2 89 2 98 2 Worst case dBm 102 0 104 7 87 7 90 9 82 9 91 9 Normal case dBm MC...

Page 23: ...emissions 6 2 Functional Description The G600 baseband is based around a 2 chip GSM chipset One chip carries out signal processing with DSP and CPU called GEMINI and the other chip contains the analog...

Page 24: ...on of a 5V step up regulator to provide the Interface requirements for a 5V SIM The SIM outputs are open drain and the inputs are 5V tolerant To achieve the required rise time on the clock line a tran...

Page 25: ...or example 12 x 12 line or 16 x 3 line both with 2 lines of icons A Sharp LH155B display driver is used 6 2 6 Microphone The microphone is the same type used on G500 6 2 7 Buzzer The volume level of t...

Page 26: ...code size is determined by the size of the software 7 2 2 CPU The CPU is a 32 bit RISC CPU with 16bit instruction set The CPU is designed to access 32bit memory and peripherals a further module within...

Page 27: ...s 16 bits API RAM 0050 0000 8k CPU DSP shared ram 16 bits TPU RAM 0050 0000 8k GSM timer Microcode RAM 16 bits APIC 0050 4000 1k CPU DSP interface controller 16 bits SIM 0050 4800 1k SIM interface 16...

Page 28: ...UART Interrupt Level sensitive IRQ_ARMIO Keypad Interrupt Low for 1 clk period IRQ_FRAME Frame Interrupt Edge sensitive IRQ_PAGE Page Interrupt Edge sensitive IRQ_TIM_GSM Edge sensitive IRQ_TSP Timed...

Page 29: ...cted I O 12 TSPACT 0 65 TSPACT 0 I O 13 nPWRCS 56 nPWRCS I O 14 nCS1 50 PAGING_LED L Paging LED off H Paging LED On I O 15 nCS0 49 CHARGE_ON H Charger On L Charger Off 2 outputs have 6 bit PWM capabil...

Page 30: ...t 270Kbits per second Figure 2 Functional structure of the baseband uplink path 600 0802 MCUK980101G8 Section 8 Issue 1 Technical Guide 8 1 Revision 0 VEGA TIMING JTAG 10 bit DAC SP INTERFACE Timing i...

Page 31: ...each step being 1 16 of a bit and each step being 1 8 of a bit giving a maximum ramp time of either 14 77 S or 29 53 S An 8 bit value is used to program the ramp output level Issue 1 Section 8 MCUK98...

Page 32: ...n GEMINI Voice Uplink path Figure 6 Voice ADC block diagram 600 0806 MCUK980101G8 Section 8 Issue 1 Technical Guide 8 3 Revision 0 VEGA 13 BIT DIGITAL MODULATOR 1 BIT DAC LOW PASS FILTER PROGRAMATION...

Page 33: ...Type 0 136h Ni MH 137 3FFh Li ION ADC2 38 Battery Temperature 0D5h 70oC 249h 25oC 3FBh 20oC ADC3 39 nADP _SENSE 0 168h Data Adaptor 17C 1EDh RS232 Direct Cable 230 2C0h SMS Cable 2L8 365h Headset Ada...

Page 34: ...suddenly removed primarily to protect the SIM The SIM power supply should be enabled and disabled as part of the SIM interface procedures and therefore falls outside the scope of this document Figure...

Page 35: ...f four modes Sleep In this mode the CPU has been prevented from deactivating the linear regulators by EXT_PWR There is no CPU activity Charge The CPU is alive but may only perform battery charging fun...

Page 36: ...is on Any other state than those in the table will cause the phone to deactivate the PSU by setting STAY_ALIVE LOW While the CPU is active it must monitor the battery condition and accessory connectiv...

Page 37: ...600 must achieve 2 types of battery operation 4 cell Ni MH and 2 cell Li ION The power supply section consists of four parts 1 Power on circuitry 2 Voltage regulators 3 Battery charging circuitry 4 Po...

Page 38: ...so shows a Power On Reset POR to hold the CPU in a reset state while the supply voltage and system clock stabilize Figure 2 Power supply block diagram 600 1002 MCUK980101G8 Section 9 Issue 1 Technical...

Page 39: ...e current consumption efficiency the G600 uses 3 4V step down DC DC voltage regulators The DC DC step down circuitry uses two regulators on the LOGIC side and three regulators on the RF side to reduce...

Page 40: ...e safeguards Deeply Discharged batteries When a battery is deeply discharged there may not be enough power to power on the phone for charging In this case the charging circuit must automatically detec...

Page 41: ...dsfree unit via pin 4 U301 provides initial amplification of the received audio R324 is a variable resistor controlled by the thumbwheel on the side of the handsfree case providing volume level contro...

Page 42: ...ut pin 1 Output pin 4 U305 CODEC Input pin 24 Output pin 13 U306 DSP Input pin 9 Output pin 13 U304 CODEC Input pin 12 Output pin 5 U301 Amplifier Input pin 5 Output pin 7 U312 Analogue Switch Input p...

Page 43: ...ut E U303 and U302 5V Reg Input pin 3 Output pin 1 External Power Supply Path from P203 pin 1 Battery from car or TP203 P203 6 PIN Connector Pin 1 or TP203 D201 Diode Input pin 1 Output pin 2 Q204 PNP...

Page 44: ...o GND J300 Pin 1 TP313 U306 pin 3 HCL U306 Pin 3 10 1 5 Adjustment and Calibration The adjustments that can be made on the handsfree unit are to the external power supply These are made by adjusting t...

Page 45: ...istor R33 Through the potential divider R39 and R38 this turns Q5 ON turning Q16 ON Should the output CN2 become accidentally short circuited the base of Q5 becomes low turning Q5 OFF This pulls the b...

Reviews: