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Nokia RA-2 Rf Description & Troubleshooting

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Nokia Customer Care
7 - RF Description and
Troubleshooting
Issue 1 09/04
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.

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  • Page 1 Nokia Customer Care 7 - RF Description and Troubleshooting Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 2 RA-2/3 Nokia Customer Care [This page intentionally blank] Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 3: Table Of Contents

    Nokia Customer Care Table of Contents Page No CMT RF......................... 5 Top-level description..................5 RA-2 test point locations ................... 6 Test points ......................8 RF implementation in RA-2/3 ................11 Frequency plan ....................11 RF block diagram ................... 12 Antenna switch module (ASM) ............... 12 DC characteristics ..................
  • Page 4 GSM1900 ....................51 RF tunings after repairs ................... 52 WLAN RF Description..................53 RF operating modes ..................54 Transmitter ..................... 54 Receiver ......................55 Synthesizer ....................55 Antenna ......................55 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 5: Cmt Rf

    • PA, ASM, LNA, baluns for Rx/Tx and Rx/Tx SAWs. • Helgo RF IC, VCO + balun, VCTCXO, baluns and EGSM Rx filter The RF transmission lines constitute of striplines and microstriplines after PA. Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 6: Ra-2 Test Point Locations

    C2210 L2332 L2206 C2202 L7822 L7702 C7510 L7805 L2331 VCTRL Power 2.8 L7709 V7802 pins1,6,4 L7830 C7714 Power 1.8 L7710 Z7808 R7711 R7715 Z7800 C7713 L7700 R7725 C7707 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.
  • Page 7 1&3 C4202 C5200 R4202 N4400 B-Cover R4422 switch R5202 J4413 J4414 Trace J2122 J2120 J2121 J5107 J5106 J3180 J3181 Production J3100 testpoints Battery Zocus J2031 J2032 J2033 N7100 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 8: Test Points

    VANT_3 Z7800 GSM_Rx Z7800 DCS_Rx Z7800 PCS_Rx Z7800 TX_IN_EGSM/850 Z7800 Table 3: Helgo serial interface test points Signal name: Ref: RFBusClk J7501 RFBusEna1 J7502 RFBusData J7509 Reset J7503 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.
  • Page 9 Table 8: Tx PA input test points Signal name: Ref: Rfin_900/850 C7707 Rfin_1800/190 L7702 Table 9: Tx filter/balun input test points Signal name: Ref: RfinP_900 L7700 RfinM_900 L7700 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 10 C7536 R7522 J7504 (test pad) Table 11: Rx test points Signal name: Ref: C7551 C7520 C7583 C7510 C7553 C7506 R7500 VrefRF01 R7525 VBAT C7725 VTXB_900 C7713 VTXB_1800_1900 C7714 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 11: Rf Implementation In Ra-2/3

    This means that the baseband modulated signals are directly converted up to the transmission frequency and the received RF signals directly down to the baseband frequency. Figure 3: RF frequency plan Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 12: Rf Block Diagram

    RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting RF block diagram Helgo Antenna switch module (ASM) Figure 4: ASM COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 13: Dc Characteristics

    The regulators (except for VR7) are connected to the Helgo. Different modes of operation can be selected inside the Helgo according to the control information coming through the RFBus. DC supply currents Figure 5: DC power supplies Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 14: Typical Current Consumption

    Rx, EGSM900/GSM850 75 mA, peak Rx, GSM1800/GSM1900 70 mA, peak Tx, power level 5, EGSM900/ 1700 mA, peak GSM850 Tx, power level 0, GSM1800/ 1000 mA, peak GSM1900 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 15: Power Distribution Diagram

    RA-2/3 7 - RF Description and Troubleshooting Nokia Customer Care Power distribution diagram Figure 6: Power distribution diagram HELGO GSM1800/ 1900 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 16: Rf Characteristics

    F = 935 + 0.2 * n 975<= n <= 1023 F= 890+0.2* (n -1024) F= 935+0.2* (n -1024) GSM1800 512 <= n <= 885 F=1710.2+0.2*(n-512) F=1805.2+0.2*(n-512) GSM1900 512 <= n <=810 F=1850.2+0.2*(n-512) F=1930.2+0.2*(n-512) COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 17: Rf Troubleshooting

    • 3 control lines from Helgo Antenna The RA-2/3 GSM850/EGSM900/GSM1800/GSM1900 transceiver features an internal anten- na. There are two triple-band antennas: one for RA-2 and one for RA-3. Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 18: Receiver Characteristics

    30 dB GSM1800/GSM1900 25 dB GSM850/EGSM900 Usable input dynamic range -102... -10 dBm RSSI dynamic range -110... -48 dBm Compensated gain variation in receiving +/- 1.0 dB band COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 19: General Instructions For Rx Troubleshooting

    RF connector (remember to compensate for cable attenuation). When measuring with an oscilloscope on "RXI" or "RXQ", you should see the fol- lowing screens on a working GSM900, GSM1800 or GSM1900 receiver: Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 20 RXQ with 942.46771 MHz signal, input level –90dBm at RF-connector. Correct signal amplitudes approximately: GSM850~170mVpp GSM900~170mVpp GSM1800~140mVpp GSM1900~160mVpp Signal part frequency 67.7kHz sine. DC level of signal part is 1.35V. DC level can variate about +/-100mV between COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.
  • Page 21 (shorter) is monitoring and 2 burst (longer) is own Rx burst. Trace1: External LNA VCC supply voltage at burst mode, input level –90 dBm. Measured from test point LNA_VCC Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 22 Used channel 37, input signal 942.46771 MHz, level –90 dBm at antenna port, AGC setting 12. Phase difference should be 90 degrees between Rx I and Q signals at all bands. COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 23: Troubleshooting Diagram For Gsm850 Receiver

    RA-2/3 7 - RF Description and Troubleshooting Nokia Customer Care Troubleshooting diagram for GSM850 receiver Phone in “Continuous” mode, AGC setting “12”. Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 24: Troubleshooting Diagram For Gsm900 Receiver

    RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Troubleshooting diagram for GSM900 receiver Phone in “Continuous” mode, AGC setting “12”. COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 25: Troubleshooting Diagram For Gsm1800 Receiver

    RA-2/3 7 - RF Description and Troubleshooting Nokia Customer Care Troubleshooting diagram for GSM1800 receiver Phone in “Continuous” mode, AGC setting “12. Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 26: Troubleshooting Diagram For Gsm1900 Receiver

    RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Troubleshooting diagram for GSM1900 receiver Phone in “Continuous” mode, AGC setting “12. COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 27: Transmitter Description And Troubleshooting

    Balanced I/Q demodulator and balanced I/Q modulator • Power control operational amplifier, acts as an error amplifier • The signal from VCO is balanced, frequencies 3296 to 3980 MHz Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 28: Afc Function

    5. Initialize connection to the phone. (Use FBUS driver when using DAU-9S and COMBOX driver when using FPS-8). 6. To choose a product in Phoenix: From the File menu, choose “Choose Product” and select RA-2/RA-3 from the list from the File menu, choose “Scan Product”. COMPANY CONFIDENTIAL Issue 1 09/04 Copyright ©...
  • Page 29 - Set Tx PA mode to "Free" (Default). - Set power level to 5 (Default = 19) on GSM 850 and GSM900 or to 0 (Default = 15) on GSM1800 or GSM1900. Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 30: Transmitter Troubleshooting Diagram

    RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Transmitter troubleshooting diagram COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 31: Helgo Ic Troubleshooting Diagram

    RA-2/3 7 - RF Description and Troubleshooting Nokia Customer Care HELGO IC troubleshooting diagram Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 32: Pa And Antenna Switch Troubleshooting Diagram

    RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting PA and antenna switch troubleshooting diagram COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 33: Pictures Of Transmitter Signals

    VPCRTL_1800/1900 power level 0 at R7704/C7704 TXC 850/900 power level 5 at R7522 VTXB 850/900 at C7713 VTXB_1800/1900 at C7714 VANT_1 at C7805 VANT_2 at C7804 VANT_3 at C7538 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 34 RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Figure 10: Tx out signal, 900 band burst mode, channel 37 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 35: Additional Information For Edge Troubleshooting

    1. Initialize a connection to the phone (see GSM850/900/1800/1900 trouble- shooting instructions). 2. To select a product in Phoenix: From the File menu, choose “Choose Product “and select RA-2/RA-3 from the list from the File menu, choose “Scan Product”. 3. From the toolbar, set operating mode to “Local”...

  • Page 36: Transmitter Edge Troubleshooting Diagram

    RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Transmitter EDGE troubleshooting diagram COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 37: Helgo Edge Troubleshooting Diagram

    -3589.6MHz (GSM900) Synthesizer -3589.6MHz(GSM900) -3495.6MHz (GSM1800) troubleshooting -3495.6MHz(GSM1800) -3760MHz (GSM1900) -3760MHz(GSM1900) Level > - 10dBm Level > - 10dBm Check modulator output components Replace HELGO Replace faulty component(s) Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 38: Pa And Antenna Switch Edge Troubleshooting Diagram

    RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting PA and antenna switch EDGE troubleshooting diagram COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 39: Pictures Of Edge Transmitter Signals

    7 - RF Description and Troubleshooting Nokia Customer Care Pictures of EDGE transmitter signals Figure 11: I_ref_1800/1900 power level 2 at R7700/C7700 Figure 12: VTXB 1800/1900 power level 2 at C7714 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 40 RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Figure 13: TXI/TXQ signal at C7535/C7536/R7516/R7517 Figure 14: TXA 850/900/1800/1900 at C7538 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.
  • Page 41 RA-2/3 7 - RF Description and Troubleshooting Nokia Customer Care Figure 15: VTXB 850/900 power level 8 at C7713 Figure 16: I_ref 850/900 power level 8 at R7701/C7701 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 42 RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Figure 17: TXC 850/900 power level 8 at 7522 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 43: Synthesizer Description And Troubleshooting

    5. Initialize connection to the phone. (Use FBUS driver when using DAU-9S and COMBOX driver when using FPS-8). 6. From the File menu, choose “Choose Product”. 7. From the list, select RA-2/RA-3. 8. From the toolbar, set operating mode to "Local" 9. From the Testing menu, choose “RF Controls”.

  • Page 44: Troubleshooting Diagram For Synthesizer

    * When 1 kOhm passive probe is used, C7503, C7504, C7505, R7501, R7502 Correct the measurement by +26dB Wrong writing on RFBus (see BB part) If ok change RF ASIC N7500 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 45: Pictures Of Synthesizer Signals

    RA-2/3 7 - RF Description and Troubleshooting Nokia Customer Care Pictures of synthesizer signals Figure 18: 26MHz at G501 pin out Figure 19: 26MHz RFCLK at R420/C420 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 46 RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting Figure 20: 1800 Tx, channel 512, burst mode Figure 21: 1900 Rx, channel 810, continuous mode COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.
  • Page 47 Ref Lvl -15.59 dBm 10 kHz -12 dBm -12 dBm 3.68560301 GHz 25 ms Unit 1VIEW -100 -112 Center 3.6856 GHz 100 kHz/ Span 1 MHz Date: 29.APR.2003 13:41:26 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 48: Frequency Lists

    848.2 893.2 3392.8 3572.8 836.0 881.0 3344.0 3524.0 848.4 893.4 3393.6 3573.6 836.2 881.2 3344.8 3524.8 848.6 893.6 3394.4 3574.4 836.4 881.4 3345.6 3525.6 848.8 893.8 3395.2 3575.2 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 49: Gsm900 (Including Egsm900)

    3836.8 902.0 947.0 3608.0 3788.0 122 914.4 959.4 3657.6 3837.6 902.2 947.2 3608.8 3788.8 123 914.6 959.6 3658.4 3838.4 902.4 947.4 3609.6 3789.6 124 914.8 959.8 3659.2 3839.2 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 50: Gsm1800

    1740.4 1835.4 3480.8 3670.8 1759.2 1854.2 3518.4 3708.4 1778.0 1873.0 3556.0 3746.0 1721.8 1816.8 3443.6 3633.6 1740.6 1835.6 3481.2 3671.2 1759.4 1854.4 3518.8 3708.8 1778.2 1873.2 3556.4 3746.4 COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 51: Gsm1900

    1899.0 1979.0 3798.0 3958.0 1861.6 1941.6 3723.2 3883.2 1880.4 1960.4 3760.8 3920.8 1899.2 1979.2 3798.4 3958.4 1861.8 1941.8 3723.6 3883.6 1880.6 1960.6 3761.2 3921.2 1899.4 1979.4 3798.8 3958.8 Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 52: Rf Tunings After Repairs

    If the RF ASIC is replaced, all calibrations mentioned above have to be done. Refer to Chapter 3, Service Software Instructions, for instructions on the above-mentioned tun- ings. COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 53: Wlan Rf Description

    ± 25 ppm Modulation 11 Msymbols/s BPSK/QPSK Data rates 1 Mb/s BPSK Barker spreading 2 Mb/s QPSK Barker spreading 5.5 Mb/s and 11 Mb/s QPSK and CCK coding Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.

  • Page 54: Rf Operating Modes

    Bluetooth selection switch and from there to Tx/Rx switch and the RF band pass filter. The RF filter attenuates the transmitter wideband noise to a level where it does not interfere GSM re- COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

  • Page 55: Receiver

    The PLL synthesizer with VCO is integrated into RFIC, only the loop filter is needed outside the RFIC. Antenna Antenna is located in the corner of the engine PWB. Antenna interface is single ended 50 W. Issue 1 09/04 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
  • Page 56 RA-2/3 Nokia Customer Care 7 - RF Description and Troubleshooting [This page intentionally blank] COMPANY CONFIDENTIAL Issue 1 09/04 Copyright © 2004 Nokia. All Rights Reserved.

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