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Nokia RA-8 Rf Description And Troubleshooting
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Nokia RA-8 Rf Description And Troubleshooting

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Nokia Customer Care
7 - RF Description and
Troubleshooting
Issue 1 11/05
COMPANY CONFIDENTIAL
Copyright © 2005 Nokia. All Rights Reserved.

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  • Page 1 Nokia Customer Care 7 - RF Description and Troubleshooting Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 2 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care [This page intentionally blank] Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 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-8 test point locations ................... 6 Test points ......................7 RF implementation in RA-8................11 Frequency plan ....................11 RF block diagram ................... 12 Antenna switch module (ASM) ............... 13 DC characteristics ..................
  • Page 4 RA-8 Nokia Customer Care 7 - RF Description and Troubleshooting [This page intentionally blank] COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 5: Cmt Rf

    • PA, ASM, TK balun • Honi RF IC, VCO + balun, VCTCXO, BAW-LNA, Rx filter, Tx filter The RF transmission lines constitute of striplines and microstriplines after PA. Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 6: Ra-8 Test Point Locations

    R7601 C7706 C7706 C7705 C7705 J7506 J7506 J7506 J7505 J7505 J7505 C7721 C7721 Reset Reset Reset R7710 R7710 C7702 C7702 R7712 R7712 Z7600 Z7600 R7705 R7705 R7707 R7707 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 7: Test Points

    7 - RF Description and Troubleshooting Nokia Customer Care Figure 2: Bottom view J7507 RF test connection Test points Table 1: Rx test points Signal name: Ref: LNAB_P Z7603 LNA_P Z7603 J7500 J7501 Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 8 Table 4: Synthesizer test points Signal name: Ref: VCO_out G7500 VCTCXO_out G7501 Table 5: GSM900 Rx Honi input test points Ref: RX filter Z7601 Inductor L7603 Inductor L7604 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 9 Table 8: Tx PA input test points Signal name: Ref: Rfin_900 R7705 Rfin_1800/190 R7710 Table 9: Tx filter/balun input test points Signal name: Ref: RfinP_900 C7721 RfinM_900 C7721 RfinP_1800_1900 C7705 RfinM_1800_1900 C7706 Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 10 TXIP J7512 TXQM J7510 TXQP J7509 J7508 J7507 (test pad) J7506 Table 11: Rx test points Signal name: Ref: C7516 L7500 C7505 C7506 R7500 VrefRF01 R7503 VBAT C7702 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 11: Rf Implementation In Ra-8

    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 HONI Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 12: Rf Block Diagram

    RA-8 Nokia Customer Care 7 - RF Description and Troubleshooting RF block diagram COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 13: Antenna Switch Module (Asm)

    The regulators (except for VR7) are connected to the Honi. Different modes of operation can be selected inside the Honi according to the control information coming through the RFBus. Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 14 Leakage current (triple band PA) Rx, EGSM900 75 mA, peak Rx, GSM1800/GSM1900 70 mA, peak Tx, power level 5, EGSM900 1700 mA, peak Tx, power level 0, GSM1800/ 1000 mA, peak GSM1900 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 15 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care Power distribution diagram Figure 6: Power distribution diagram Honi GSM1900 Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 16: Rf Characteristics

    975 <= n <= 1023 F= 890+0.2* (n -1024) F= 935+0.2* (n -1024) DCS1800 F=1710.2+0.2*(n-512) F=1805.2+0.2*(n-512) 512 <= n <= 885 PCS1900 512 <= n <=810 F=1850.2+0.2*(n-512) F=1930.2+0.2*(n-512) COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 17: Rf Troubleshooting

    Antenna 50 ohm input • RXs single outputs • TXs single 50 ohm inputs • 3 control lines from Honi Antenna The RA-8 EGSM900/GSM1800/GSM1900 transceiver features an internal antenna. Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 18: Receiver Characteristics

    30 dB GSM1800/GSM1900, 25 dB GSM900 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 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 19: General Instructions For Rx Troubleshooting

    6. Initialize connection to the phone. (Use FBUS driver when using DAU-9S and COMBOX driver when using FPS-8). 7. From the File menu, choose “Choose Product”. 8. From the list, select RA-8. 9. From the toolbar, set operating mode to "Local". 10.From the Testing menu, choose “RF Controls”.
  • Page 20 RXQ with 942.46771 MHz signal, input level –90dBm at RF-connector. Correct signal amplitudes approximately: GSM900~170mVpp GSM1800~140mVpp GSM1900~160mVpp Signal part frequency 67.7kHz sine. DC level of signal part is 1.35V. DC level can vary about +/-100mV between I COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 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 11/05 COMPANY CONFIDENTIAL Copyright © 2005 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 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 23 7 - RF Description and Troubleshooting Nokia Customer Care Troubleshooting diagram for GSM900 receiver Phone in “Continuous” mode, AGC setting “12”. HONI HONI Z7600 Check Z7601, HONI L7603, L7604 HONI HONI Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 24 Nokia Customer Care 7 - RF Description and Troubleshooting Troubleshooting diagram for GSM1800 receiver Phone in “Continuous” mode, AGC setting “12. HONI HONI Z7600 Z7602, L7601, HONI L7602 HONI HONI COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 25 Troubleshooting diagram for GSM1900 receiver Phone in “Continuous” mode, AGC setting “12. HONI Z7600 HONI Check Z7603, R7601, R7602, L7600 HONI LNAB_P 2.6V LNA_P 0V HONI Check Z7603 HONI HONI HONI Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 26: 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 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 27: Afc Function

    4. Set the phone module to test jig and start Phoenix service software. 5. Initialize connection to the phone. (Use FBUS driver when using DAU-9S and COMBOX driver when using FPS-8). Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 28 7 - RF Description and Troubleshooting 6. To choose a product in Phoenix: From the File menu, choose “Choose Product” and select RA-8 from the list from the File menu, choose “Scan Product”. 7. From the toolbar, set operating mode to "Local".
  • Page 29 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care Transmitter troubleshooting diagram Honi Replace Honi Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 30 RA-8 Nokia Customer Care 7 - RF Description and Troubleshooting Honi IC troubleshooting diagram Honi - VR2, VR5, VR6 = 2.8V - Honi serial interface Replace Honi COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 31 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care PA and antenna switch troubleshooting diagram Honi Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 32 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 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 33 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care Figure 10: Tx out signal, 900 band burst mode, channel 37 Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 34: Additional Information For Edge Troubleshooting

    1. Initialize a connection to the phone (see GSM900/1800/1900 troubleshooting instructions). 2. To select a product in Phoenix: From the File menu, choose “Choose Product “and select RA-8 from the list from the File menu, choose “Scan Product”. 3. From the toolbar, set operating mode to “Local”...
  • Page 35 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care Transmitter EDGE troubleshooting diagram Honi EDGE Replace HONI Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 36 -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 HONI Replace faulty component(s) COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 37 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care PA and antenna switch EDGE troubleshooting diagram HONI Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 38: Pictures Of Edge Transmitter Signals

    7 - RF Description and Troubleshooting 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 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 39 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care Figure 13: TXI/TXQ signal at C7535/C7536/R7516/R7517 Figure 14: TXA 900/1800/1900 at C7538 Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 40 RA-8 Nokia Customer Care 7 - RF Description and Troubleshooting Figure 15: VTXB 900 power level 8 at C7713 Figure 16: I_ref 900 power level 8 at R7701/C7701 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 41 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care Figure 17: TXC 900 power level 8 at 7522 Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 42: 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-8. 8. From the toolbar, set operating mode to "Local" 9. From the Testing menu, choose “RF Controls”.
  • Page 43 R7501, R7502 Wrong writing on RFBus (see BB part) Wrong writing on RFBus (see BB part) If ok change RF ASIC N7500 If ok, change RF ASIC N7500 Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 44 RA-8 Nokia Customer Care 7 - RF Description and Troubleshooting Pictures of synthesizer signals Figure 18: 26MHz at G501 pin out Figure 19: 26MHz RFCLK at R420/C420 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 45 RA-8 7 - RF Description and Troubleshooting Nokia Customer Care Figure 20: 1800 Tx, channel 512, burst mode Figure 21: 1900 Rx, channel 810, continuous mode Issue 1 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 46 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 COMPANY CONFIDENTIAL Issue 1 11/05 Copyright © 2005 Nokia. All Rights Reserved.

  • Page 47: Frequency Lists

    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 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.
  • Page 48 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 11/05 Copyright © 2005 Nokia. All Rights Reserved.
  • Page 49 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 11/05 COMPANY CONFIDENTIAL Copyright © 2005 Nokia. All Rights Reserved.

  • Page 50: 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 11/05 Copyright © 2005 Nokia. All Rights Reserved.

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