Nokia RH-3 Series Troubleshooting - Gps
  1. Manuals
  2. Brands
  3. Nokia Manuals
  4. Cell Phone
  5. RH-3 Series
  6. Troubleshooting - gps
Nokia RH-3 Series Troubleshooting - Gps

Nokia RH-3 Series Troubleshooting - Gps

Transceivers
Hide thumbs Also See for RH-3 Series:
Table of Contents

Advertisement

Quick Links

Download this manual
CCS Technical Documentation
RH-3 Series Transceivers
Troubleshooting — GPS
Nokia Corporation
Issue 1 06/2003
Confidential

Advertisement

Table of Contents
loading

Related Manuals for Nokia RH-3 Series

Summary of Contents for Nokia RH-3 Series

  • Page 1 CCS Technical Documentation RH-3 Series Transceivers Troubleshooting — GPS Nokia Corporation Issue 1 06/2003 Confidential...
  • Page 2 RH-3 Troubleshooting — GPS CCS Technical Documentation Nokia Corporation Page 2 Confidential Issue 1 06/2003...

  • Page 3: Table Of Contents

    GPS RF Circuitry and Component Placement ............16 GPS Module Test Points ....................17 GPS RF General Checking ..................18 GPS Reference Clock Checking ................21 GPS RF and GPS BB Interface Checking ..............23 GPS RX Chain Checking ...................24 Nokia Corporation Issue 1 06/2003 Confidential Page 3...
  • Page 4 RH-3 Troubleshooting — GPS CCS Technical Documentation Nokia Corporation Page 4 Confidential Issue 1 06/2003...

  • Page 5: Troubleshooting - Global Positioning System (Gps) Engine

    (CE) circuitry are completely separate in the handset. The GPS circuitry is located exclusively on the secondary side of the PWB. See Figure 1 for the General Block Diagram. Figure 1: GPS Block Diagram Nokia Corporation Issue 1 06/2003 Confidential Page 5...

  • Page 6: Acronyms And Abbreviations

    Federal Communications Commission Navstar Global Positioning System Hardware Integrated Circuit Link 1 LPRF Low Power RF Noise Figure Personal Communications Service Pseudo Random Noise PSAP Public Safety Answering Point Printed Wiring Board Nokia Corporation Page 6 Confidential Issue 1 06/2003...

  • Page 7: Troubleshooting The Gps Bb

    Before implementing the flowchart, turn the GPS section ON in the “GPS Receiver Con- trol (AMS)” tab of the GPS component in Phoenix. Reference Table 1 for GPS Test Points assignment and Figure 10 for GPS Test Points locations. Nokia Corporation Issue 1 06/2003 Confidential Page 7...
  • Page 8 BB ASIC being held in held high? reset, troubleshoot (J061) source in CE GPS_SLEEPCLK Troubleshoot CE (32.768KHz) OK? sleep clock circuit (J063) VRF_GPS regulator Replace regulator VRF_GPS OK? enable line low? N052 Nokia Corporation Page 8 Confidential Issue 1 06/2003...
  • Page 9 ASIC Determine why CE not CE sending code sending download download signals? signals Replace GPS BB SPI interface active? ASIC Replace GPS RF RF data and clock? ASIC Debug RF front end Nokia Corporation Issue 1 06/2003 Confidential Page 9...

  • Page 10: Flowchart Notes

    The proper GPS_RF_CLK is a 19.2 MHz, approximately 800mV peak-to-peak sine wave (see Figure 3). Figure 3: 19.2MHz System Clock The GPS_CLK should be a 16.3MHz, 1.8V peak-to-peak square wave (see Figure 4). Figure 4: GPS_CLK Nokia Corporation Page 10 Confidential Issue 1 06/2003...
  • Page 11 (e.g., between idle and off mode in the “Rx simple actions” tab of the GPS component in Phoe- nix). See Figure 6. Nokia Corporation Issue 1 06/2003 Confidential...
  • Page 12 B3) and GPS_CLK. The GPS_CLK has been previously tested (see the flowchart). The four-data lines should show continuous activity almost immediately after power has been applied to the phone (see Figure 7). Figure 7: RF Data and Clock Nokia Corporation Page 12 Confidential Issue 1 06/2003...

  • Page 13: Troubleshooting The Gps Rf

    2 GPS reference clock checking 3 GPS RF and GPS BB interface checking 4 GPS RX chain checking The fastest way to troubleshoot GPS RF is to follow the GPS RF Fault-finding chart Quick Nokia Corporation Issue 1 06/2003 Confidential Page 13...

  • Page 14: Test Equipment

    ÷ 2 GPS Clock ÷ 8 LO/8 Test Point LO/8 Test 196.416 MHz ÷12 fcomp=16.368MHz Ph ase DATA Pr ogramming CLOCK 16.368 MHz Oscillator Interface ENABLE TCXO Figure 8: GPS RF Functional Diagram Nokia Corporation Page 14 Confidential Issue 1 06/2003...

  • Page 15: Gps Rf Quick Fault-Finding Chart

    Check signal level at V001 Not OK Replace transistor V001 output (C010) Check signal level at N054 Not OK Replace filter Z004 input (C069) Figure 9: GPS RF Fault-finding chart (Quick Reference) Nokia Corporation Issue 1 06/2003 Confidential Page 15...

  • Page 16: Gps Rf Circuitry And Component Placement

    GPS_SPI_CLK J007 GPS_SPI_DATA J008 GPS_SPI_EN J006 XTAL 2 J008 GPS_CLK J001 GPS_U2TX R044 GPS_U2RX J017 GPS_PA_EN J011 GPS_SLEEPX J015 GPS_U1_DATA_RDY-TIMESTAMP J013 GPS_U1_RX J014 GPS_U1_TX J016 GPS_INT_U1_CLK J012 GPS_EN_RESET J009 GPS_RFCLK (19.2 MHZ) Nokia Corporation Page 16 Confidential Issue 1 06/2003...

  • Page 17: Gps Module Test Points

    GPS Module Test Points J007 J002 J008 J005 C017 C069 J006 J003 J004 J009 J012 C067 J016 J014 J015 J013 R044 J001 J017 J011 J010 L005 C010 Figure 10: GPS Component Placement (PWB Bottom Side) Nokia Corporation Issue 1 06/2003 Confidential Page 17...

  • Page 18: Gps Rf General Checking

    3 Connect DAU-9T cable to Tomahawk connector 4 On Phoenix, choose connection as FBUS and select File/Scan Product 5 Select Troubleshooting/GPS Testing/GPS Quick Test/Test Mode Galvanic in Phoenix 6 Execute (see the following diagrams for reference) Nokia Corporation Page 18 Confidential Issue 1 06/2003...
  • Page 19 (or vary +/- 10 dB compared to galvanic SNR result) 9 Check Bin value is between 2448 +/- 105 10 If the test didn’t pass, start to troubleshoot by selecting Troubleshooting/GPS Nokia Corporation Issue 1 06/2003 Confidential Page 19...
  • Page 20 12 Check operating voltages DC voltages VRF_GPS at C017, LNA VCE at C006 and VIO at C067 should be as presented in the following picture: Figure 11: DC level of LNA Collector Emitter Voltage Vce Nokia Corporation Page 20 Confidential Issue 1 06/2003...

  • Page 21: Gps Reference Clock Checking

    Figure 13: DC level of VIO GPS Reference Clock Checking 1 Cycle power 2 Choose connection as FBUS and select File/Scan Product 3 Select Troubleshoot/GPS Testing/GPS Receiver Control (AMS) / Receiver On in Phoenix Nokia Corporation Issue 1 06/2003 Confidential Page 21...
  • Page 22 8 GPS 16.368 MHz system clock for GPS RF ASIC N054 should be within +/- 256 Hz limits if tested with MCU/GPS Control/GPS Quick Test. The 16.368 MHz signal looks like the following picture: Figure 15: GPS 16.368 MHz reference clock from TCXO before C029 Nokia Corporation Page 22 Confidential Issue 1 06/2003...

  • Page 23: Gps Rf And Gps Bb Interface Checking

    1 Next connect oscilloscope 10:1 probe into GPS_CLK output of the N054 between pin D7 and J008 2 GPS 16.368 MHz system clock to GPS BB should look like the following picture: Figure 17: GPS 16.368 MHz reference clock to GPS BB Nokia Corporation Issue 1 06/2003 Confidential Page 23...

  • Page 24: Gps Rx Chain Checking

    2 Connect spectrum analyzer through active probe with attenuator into filter Z001 output 3 If connector/switch X001 and filter Z001 are OK, the signal level should be simi- lar to the following picture: Nokia Corporation Page 24 Confidential Issue 1 06/2003...
  • Page 25 6 Next connect spectrum analyzer through active probe with attenuator into filter Z002 Output 7 If connector/switch X001, filter Z001, LNA V001 and filter Z002 are OK , the sig- nal level should be similar to the following picture: Nokia Corporation Issue 1 06/2003 Confidential Page 25...
  • Page 26 RH-3 Troubleshooting — GPS CCS Technical Documentation Figure 21: Signal level at Z002 output Figure 22: Signal level at IF output @-100dBm Input Nokia Corporation Page 26 Confidential Issue 1 06/2003...
  • Page 27 RH-3 CCS Technical Documentation Troubleshooting — GPS Figure 23: Signal level at IF output @-110dBm Input Figure 24: Signal level at IF output @-120dBm Input Nokia Corporation Issue 1 06/2003 Confidential Page 27...
  • Page 28 RH-3 Troubleshooting — GPS CCS Technical Documentation Nokia Corporation Page 28 Confidential Issue 1 06/2003...

This manual is also suitable for:

2285

Table of Contents