Nokia RH-10 Series Troubleshooting Manual

Hide thumbs

Advertisement

Quick Links

Table of Contents
CCS Technical Documentation
RH-10 Series Transceivers
Troubleshooting
Nokia Corporation
Issue 1 09/2002
Confidential

Advertisement

Table of Contents
loading

  Also See for Nokia RH-10 Series

  Summary of Contents for Nokia RH-10 Series

  • Page 1 CCS Technical Documentation RH-10 Series Transceivers Troubleshooting Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 2 RH-10 Troubleshooting CCS Technical Documentation Nokia Corporation Page 2 Confidential Issue 1 09/2002...
  • Page 3: Table Of Contents

    Turning on AMPS Transmitter ................31 Turning on Receiver Only..................32 Verifying a Single Manual Tuning................33 Adjusting PDM Values for AGCs and AFC ............33 Reading Tuning Values from the Phone ..............34 Nokia Corporation Issue 1 09/2002 Confidential Page 3...
  • Page 4 Reading RSSI and AGC PDM Values from the Phone .......... 34 Loading PRLs into the Phone.................. 35 Changing Between Local Mode and Normal Mode..........35 Baseband Test Tone for AMPS Transmitter Tests..........36 Block Diagrams ......................37 Nokia Corporation Page 4 Confidential Issue 1 09/2002...
  • Page 5: Transmitter Troubleshooting

    24 dBm. (PWR_OUT greater than 1.91v, which corresponds to the power detector ADC=700.) For each of the next three cases, TX power should be less than 24 dBm (less than 1.91v on PWR_OUT). Nokia Corporation Issue 1 09/2002 Confidential Page 5...
  • Page 6: St Robin Vhfpll Cell

    Manual Verification: Ensure the phone is cool by letting it cool down for several minutes. Retest, keeping in mind that if there is a short circuit on the board, the phone will get Nokia Corporation Page 6 Confidential...
  • Page 7: Sn Cell Rx Bb Filter

    SN AMPS RX DC Offset I (or Q) This is one of the phone’s self-tunings, which measures and adjusts the cell band CDMA receiver DC offsets until they are within the set limits. Nokia Corporation Issue 1 09/2002 Confidential Page 7...
  • Page 8: Test Tx Start-Up Current

    The carrier then is centered in frequency. This is done to the car- rier after it has been mixed up to 1880 MHz, since it is easier to measure the tolerance of Nokia Corporation Page 8 Confidential...
  • Page 9 1 of G501. If it is 2.2v (and pin 4 is at 2.7v and pin2 at 0v), then the VCTCXO (G501) is working correctly but the circuit that delivers the control voltage is not. Check soldering of all G501 terminals; also check R510, R511, Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 10: Tn Tx Dc Offset Reference Power

    Robin output at L613 at 836.52 MHz + 20 kHz. If not, there is a problem with N601 (Robin). Ensure power supplies to Robin (VR2, VR3, VR6, and VIO) are correct. Check components around Robin. If still failing, replace Robin. Nokia Corporation Page 10 Confidential...
  • Page 11: Tn Tx Dc Offset Carrier Suppression

    The IF gain curve is characterized by varying the TX_IF_AGC and measuring the transmit power. This is only done once (in cell CDMA mode) since the same circuitry is used for both cell. Nokia Corporation Issue 1 09/2002 Confidential Page 11...
  • Page 12: Tn Pa Gain Cal Cell Po (0) [Or, (1), (2), (3), (4), Or (5)]

    The software then performs curve fitting to interpolate between the measured data points. The result is the transmitted power in dBm for each of the six PA AGC PDM settings (results labeled 0 through 5). Nokia Corporation Page 12 Confidential Issue 1 09/2002...
  • Page 13: Tx Tx If 11 Dbm Set Cell Po

    TX IF AGC is adjusted so that the output power is +11 dBm. The result is a power in dBm. A perfect result would be +11.00 dBm. Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 14: Tn Tx Rf Agc Cell Po (0) [Or (1), Or (2)]

    (G_Offset is not adjusted on the other channels as it was on the center channel — just the output power is recorded.) The result is the transmitted power in dBM, which should be -8.0 dBm +/- 0.5 dB on the center channel. Nokia Corporation Page 14 Confidential Issue 1 09/2002...
  • Page 15: Tx If 11 Dbm Set Cell Po

    The results are TX power readings in dBm of the transmitted signal measured for each of the listed PDM settings of the Cell TX RF AGC. Manual Verification: Set up the transmitter as described in tuning 24.3 above. Set the Cell PA PDM to -329. Nokia Corporation Issue 1 09/2002 Confidential Page 15...
  • Page 16: Tn Tx Gain Comp Cell (Or Pcs) Po Md (Or Lo, Lm, Ml, Mh, Hm, Or Hi)

    Once this is done on the center channel, change to each of the other channels and record the power. Do not adjust G_Offset on the other channels—just record the power. It should be within the limits listed in the tuning results file. Nokia Corporation Page 16 Confidential...
  • Page 17: Tn G_Offset Cell Md

    Adjust TxdBCtr in the “values” dialog box until the output power is within the limits (adjusting for cable loss). Troubleshooting: Troubleshoot the cell transmitter, setting the TX AGC values to those listed for Power Level 0 in Table 1. Nokia Corporation Issue 1 09/2002 Confidential Page 17...
  • Page 18: Tn Amps Pl3 (Or 4, 5, 6, Or 7) Po

    Troubleshooting: If the maximum cannot be reached, either a component in the trans- mitter has too much loss, or not enough gain. Troubleshoot the Cell transmitter with the phone set to the same channel as the failed channel. Nokia Corporation Page 18 Confidential...
  • Page 19: Tn Tx Limiting Cell Cdma2000: Po

    “mode”= RF Tuning, and choose the appropriate tuning name. Ensure that the resulting value of RxdBCtr is within the limits in the tuning results file. Troubleshooting: While injecting a signal into the receiver, check the values of RSSI and Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 20: Tn Lna Amps (Or Cell) Lowgain (Or Highgain) Lo (Or Lm, Ml, Md, Mh, Hm, Hi)

    CDMA, but it is used in AMPS. A low-level signal (typically at sensitivity level of -116.0 dBm) is injected into the receiver, and SINAD is read off the call box. The passing limit is 12 dB. Nokia Corporation Page 20 Confidential...
  • Page 21: Probing/Troubleshooting

    When testing the CDMA receiver, it is easier to inject a CW tone into the receiver. The gains and losses will be the same for a CW signal as for CDMA. Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 22: Probing Tables

    UEM (D200) 1, Figure 1 Use O-scope. For CDMA modula- D200, N601 (VR2,3,6,IO) out=Robin (N601) tion turned on, 550 mV p-p, looks like noise. For AMPS, with test tone turned on. Nokia Corporation Page 22 Confidential Issue 1 09/2002...
  • Page 23 Z802, C801, L812, X800. If no cable (Z803) out Probing here connected to X800, then addition- not recom- ally: L802, R823, L803, R824 mended unless necessary; best to measure on RF connector Nokia Corporation Issue 1 09/2002 Confidential Page 23...
  • Page 24 V602, C637, V601, C630, C631, to verify pres- L611, C638, R604, R601, R602 ence of LO, but this won’t measure amplitude accurately.) Voltage on Robin UEM output for mode with test turned on Nokia Corporation Page 24 Confidential Issue 1 09/2002...
  • Page 25 50, Figure 1 1.36v D200, C606, N601 Table 4: Receiver Probing (PDM and voltage) Voltage for PDM mean RX power in lower limit upper limit PDM mean AMPS ch 384 LowGain 0.98 -65 dBm Nokia Corporation Issue 1 09/2002 Confidential Page 25...
  • Page 26 G502, L509, R505, R515 first. Else, but won’t read check C511, C501, C532, C550, accurate R550, C509, R503, C508, R508, power C518, N501, R506, C516, C515, C521, R513, C504. Lastly, check R523, R519, R509 Nokia Corporation Page 26 Confidential Issue 1 09/2002...
  • Page 27 High = 2.4v min N701, N750, R721, C753 high gain Low = 0.3v max Low = LNA low gain IF_SEL High = AMPS 57, Figure 2 1.35v D200, C706, N701 Low = CDMA Nokia Corporation Issue 1 09/2002 Confidential Page 27...
  • Page 28 VCTCXO, UHF PLL VR1B 4.75 Robin 2.78 Robin, Power Detector 2.78 Robin, VCTCXO 2.78 UHF PLL 2.78 Batman 2.78 Robin, UHF PLL 2.78 Batman Robin, UHF PLL Alfred VPLL 2.78 UHF PLL VBAT 3.1-4.2 Nokia Corporation Page 28 Confidential Issue 1 09/2002...
  • Page 29: Probing Diagrams

    RH-10 CCS Technical Documentation Troubleshooting Probing Diagrams Figure 1: Test Points Figure 2: Test Points Nokia Corporation Issue 1 09/2002 Confidential Page 29...
  • Page 30: Phoenix Instructions

    Set button in the upper righthand portion of the dia- log box. Next, turn on the modulation by opening the “CDMA Control” dialog box from the DSP drop-down menu. The dialog box is shown here. Nokia Corporation Page 30 Confidential Issue 1 09/2002...
  • Page 31: Turning On Amps Transmitter

    The result is that the signal will not be stable in frequency and will not respond to AGC PDM adjustment. If this is the case, manually disable the AFC and AGC using the “DSP Mem- ory Tool” dialog box, shown here. Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 32: Turning On Receiver Only

    To turn on the receiver only, use the “Main Mode” dialog box as described in the Turning on Cell CDMA Transmitter section. Highlight “RX” in the Band field and then choose “Cell CDMA”. Nokia Corporation Page 32 Confidential Issue 1 09/2002...
  • Page 33: Verifying A Single Manual Tuning

    (Alternatively, you can click the up and down arrows next to the value fields below the sliders. This will increase or decrease the value one step at a time. If you use this method, you do not have to click the Set button.) Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 34: Reading Tuning Values From The Phone

    The AGC PDM values are shown beside their respective variable gain amplifier in the block diagram. The TX AGC PDMs are, as shown in the fol- lowing diagram from right to left, IF_AGC, RF_AGC, PA_AGC. Nokia Corporation Page 34 Confidential...
  • Page 35: Loading Prls Into The Phone

    To make a call, the phone should be in normal mode. When in normal mode, the phone software is running, and the phone will search for a pilot. To troubleshoot so that you can manually control the phone (not in a call), the phone Nokia Corporation Issue 1 09/2002 Confidential...
  • Page 36: Baseband Test Tone For Amps Transmitter Tests

    Baseband Test Tone for AMPS Transmitter Tests To add a baseband test tone to the AMPS transmitter, open the “RF Test Tone” dialog box, shown here, and set the parameters as desired. Nokia Corporation Page 36 Confidential Issue 1 09/2002...
  • Page 37: Block Diagrams

    RH-10 CCS Technical Documentation Troubleshooting Block Diagrams Figure 4: Transmitter Block Diagram Figure 5: Receiver Block Diagram Nokia Corporation Issue 1 09/2002 Confidential Page 37...
  • Page 38 RH-10 Troubleshooting CCS Technical Documentation Figure 6: Synthesizer Block Diagram Nokia Corporation Page 38 Confidential Issue 1 09/2002...
  • Page 39 RX VHF CELL 256.2 ° Block 869.04 - 893.97 CELL RX IF MHz 30 kHz CELL 128.1 Steps RX Q Figure 7: Frequency Plan Figure 8: Distribution of VCTCXO tone at 19.2 MHz Nokia Corporation Issue 1 09/2002 Confidential Page 39...
  • Page 40 TEST1 1.35V reference voltage RBIAS SSB MIXER EXT VCO input TX_IF_AGC_REF TX_IF_AGC PLL_TESTN PLL_TESTP VHF VCO tank VHF charge-pump out VCO BAND SWITCH RF_BUS_EN1X RF_BUS_DATA RF_BUS_CLK Figure 9: Detailed Robin Block Diagram Nokia Corporation Page 40 Confidential Issue 1 09/2002...
  • Page 41 RH-10 CCS Technical Documentation Troubleshooting Figure 10: Detailed Batman Block Diagram Nokia Corporation Issue 1 09/2002 Confidential Page 41...
  • Page 42 RH-10 Troubleshooting CCS Technical Documentation Figure 11: Block Diagram for both Shark (Cell, AMPS, PA) Figure 12: CDMA AGC Algorithm Nokia Corporation Page 42 Confidential Issue 1 09/2002...
  • Page 43 CCS Technical Documentation Troubleshooting AM PS AGC IF AG C TOTAL PA AGC RF AGC AM PS PW R LEVE L LEVELS O utput Power dBm dBm dBm Figure 13: AMPS AGC Algorithm Nokia Corporation Issue 1 09/2002 Confidential Page 43...
  • Page 44 RH-10 Troubleshooting CCS Technical Documentation Nokia Corporation Page 44 Confidential Issue 1 09/2002...

Table of Contents