Nokia RH-6 Series Rf Description & Troubleshooting

Hide thumbs Also See for RH-6 Series:

Disassembly instructions manual (12 pages)

Baseband description & troubleshooting (72 pages)

Table Of Contents

Table of Contents

Quick Links

Download this manual

Customer Care Solutions

RH-6 Series Cellular Phones

7 - RF Description &

Troubleshooting

Issue 1 10/2003

Page 1

Company Confidential

Table of Contents

Troubleshooting

Summary of Contents for Nokia RH-6 Series

Page 2: Table Of Contents
RX band filter response compensation ..............45 RX channel select filter calibration ................54 RX AM suppression – not needed ................55 TX power level tuning ....................56 TX I/Q tuning ......................62 Copyright © 2003 Nokia Corporation. Page 2 Issue 1 10/2003 Company Confidential...
Page 3: Rf Description And Troubleshooting
PWB. Capacitors can be checked for short-circuiting and resistors for value by means of an ohm-meter, but be aware: in-circuit measurement results have to be evaluated carefully. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 3...
Page 4: Rf Key Component Placement
Murata, SX-B195F Z604 SAW900 RX Epcos, B7710 4511279 Z701 SAW900 TX Epcos, B7715 4511311 N601 Mjölner Infineon, F3 4370867 B601 XTAL NDK and Toyocom 4510337 G701 FDK, IT016 4350315 Copyright © 2003 Nokia Corporation. Page 4 Issue 1 10/2003 Company Confidential...
Page 5: Rf Measurement Points
The RF power supplies are generated in the UEM and can be measured either in the Mjoelner chamber or in the baseband chamber. The pictures below indicate with red cir- cles where the test points are located. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 5...
Page 6 J613 Transmitter test points TX_1800 VBAT_RF TX_900 VTXB_900 Tx Test Points Pout DCS/PCS Pout EGSM TXIOUTP TXIOUTN TXQOUTN CONT3 (VANTL) Antenna TXQOUTP Feed CONT1 CONT2 (VANTM) (VANTH) VREF1 Copyright © 2003 Nokia Corporation. Page 6 Issue 1 10/2003 Company Confidential...
Page 7 Company Confidential RH-6 CCS Technical Documentation 7 - RF Description & Troubleshooting Synthesizer test points PLL Test Points VR1A RFCLK_I VREF1 UTUNE VCOout Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 7 Company Confidential...
Page 8: Rf Implementation In Rh-6
LP R FC LK PC S: 1850-1910 M H z R FC LK EG SM : 880-915 MH z I-signal Q -sign al Figure 5: RF frequency plan Copyright © 2003 Nokia Corporation. Page 8 Issue 1 10/2003 Company Confidential...
Page 9: Rf Block Diagram
Company Confidential RH-6 CCS Technical Documentation 7 - RF Description & Troubleshooting RF block diagram Figure 6: RF block diagram Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 9 Company Confidential...
Page 10: Rf Power Supply Configuration
13/26 MHz (SELADDR) 0.02 mA dig. interface (VDDDL) 1.35 V VREF01 bias reference (VBEXT) 100 uA 3.6 V VBAT Triple band PA Figure 7: RF Power distribution diagram Copyright © 2003 Nokia Corporation. Page 10 Issue 1 10/2003 Company Confidential...
Page 11: Receiver Description And Troubleshooting
LNAs provide the front-end gains. Each of the SAW filters has a single-ended input and a balanced output which provides a balanced RX signal to the corresponding input of the Mjoelner RF ASIC. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 11...
Page 12: Fault Finding Chart For Receiver
RSSI reading. It is assumed that correct cali- bration of RSSI reading has been carried out in production. RSSIreading [dBm] = 20log(U ) + AGC calibrated Copyright © 2003 Nokia Corporation. Page 12 Issue 1 10/2003 Company Confidential...
Page 13: General Instructions For Rx Troubleshooting
DC voltage of 3.6 V. Then follow the instructions below. Measuring RX I/Q signals using RSSI reading Start Phoenix Service Software and open FBUS connection. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 13 Company Confidential...
Page 14 1960.06771 MHz (channel 661 + 67.710kHz offset) and a power level of – 80dBm to the antenna connector/test jig (remember to compen- sate for cable and jig attenuation). Copyright © 2003 Nokia Corporation. Page 14 Issue 1 10/2003 Company Confidential...
Page 15 GSM 900 or GMS1800 or GSM1900 Active unit Operation mode Burst RX/TX Channel 37 or 700 or 661 Select Maintenance Alt-M Testing SNR MeasurementM Select Fast SNR (Radio Button) Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 15 Company Confidential...
Page 17 Wait until the RF Controls window pops up. Select Band GSM 900 or GMS1800 or GSM1900 Active unit continuous Operation mode RX/TX Channel 37 or 700 or 661 Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 17 Company Confidential...
Page 18 Company Confidential 7 - RF Description & Troubleshooting CCS Technical Documentation Following picture should be seen on a working EGSM receiver: Signal amplitude 1.25V DC offset 1,35V Frequency 67kHz Copyright © 2003 Nokia Corporation. Page 18 Issue 1 10/2003 Company Confidential...
Page 19: Transmitter Description And Troubleshooting
(balanced to single ended), a 3dB pad, and the 900 MHz buffer to the EGSM input of the power amplifier (PA). The PA EGSM900 part has a maximum output power of app. 35dBm. Voltage supply is coming directly from the battery connectors. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 19 Company Confidential...
Page 20: General Instructions For Tx Troubleshooting
Be sure to use at least a 10dB attenuator, otherwise the results may be incorrect. 1 Connect PC with Phoenix to phone module 2 Provide the phone with power supply (3.6V). 3 Start Phoenix Service Software and open FBUS connection. Copyright © 2003 Nokia Corporation. Page 20 Issue 1 10/2003 Company Confidential...
Page 21: Egsm900 Tx Troubleshooting
Band GSM 900 Active unit Operation mode Burst RX/TX Channel TX PA Mode Free TX Power Level TX Data Type Random The setup should now look like this Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 21 Company Confidential...
Page 22 Check: C702 CONT1 Vdc = 0 Volt Mjoelner Serial Interface C701 CONT2 Vdc = 0 Volt Mjoelner C703 CONT3 Vdc = 2.78 Volt C803 Vdc - 2.78 Vol Copyright © 2003 Nokia Corporation. Page 22 Issue 1 10/2003 Company Confidential...
Page 23 (PA N801 Pout_GSM) L801,V801 Power = +25 dBm, Check TXC 897,4 MHz Spectrum analyzer Check RF-connector Directional Coupler Pout = +23 dBm, (L801) 897,4 MHz Antenna Switch (Z601) EGSM TX Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 23 Company Confidential...
Page 24: Gsm1800 Tx Troubleshooting
If this is not the case, then go to the next chapter for finding the fault. Fault finding chart for GSM1800 transmitter It is useful to use the TXP signal as trigger-signal It is provided at TXP test point. Copyright © 2003 Nokia Corporation. Page 24 Issue 1 10/2003...
Page 25 (PA N801 Pout_DCS) L801,V801 Power = +22 dBm, 1747.8 MHz Check TXC Spectrum analyzer Check RF-connector Directional Coupler (L801) Pout =+20 dBm, 1747.8 MHz Antenna Switch (Z601) DCS TX OK Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 25 Company Confidential...
Page 26: Gsm1900 Tx Troubleshooting
If this is not the case, then go to the next chapter for fault finding. Fault finding chart for GSM1900 transmitter It is useful to use TXP signal as a trigger-signal. It is provided at TXP test point. Copyright © 2003 Nokia Corporation. Page 26 Issue 1 10/2003...
Page 27 (PA N801 Pout_DCS) L801,V801 Power = +22 dBm, 1880 MHz Check TXC Spectrum analyzer Check RF-connector Directional Coupler (L801) Pout =+20 dBm, 1880 MHz Antenna Switch (Z601) PCS TX OK Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 27 Company Confidential...
Page 28: Synthesizer Description And Troubleshooting
VCO is 240MHz/V. Even if the PLL is not working (Vc outside the valid range) there is a frequency at the output of the VCO, which is between 3 and 4 GHz (if the VCO itself is ok). Copyright © 2003 Nokia Corporation. Page 28 Issue 1 10/2003...
Page 29: General Instructions For Synthesizer Troubleshooting
7 - RF Description & Troubleshooting Figure 10: PLL Block Diagram General instructions for synthesizer troubleshooting Connect the phone to a PC with Phoenix to phone module. Then follow the instructions below. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 29 Company Confidential...
Page 30: Check Synthesizer Operation
The setup should now look like this: The frequency of 3769.6MHz at the output of the VCO (G701) is measured using a resis- tive probe and a spectrum analyzer. Copyright © 2003 Nokia Corporation. Page 30 Issue 1 10/2003 Company Confidential...
Page 31: Fault Finding Chart For Pll Synthesizer
It is important to note that the power supply of the VCXO (VR3) is only switched off in the so-called ‘Deep Sleep Mode’ and the power supply of the VCO (G701 VR7) is switched off in so-called ‘Sleep Mode’. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 31...
Page 32: 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 Copyright © 2003 Nokia Corporation. Page 32 Issue 1 10/2003 Company Confidential...
Page 33 1784,8 1879,8 3569,6 3759,6 1728,6 1823,6 6914,4 7294,4 1747,4 1842,4 3494,8 3684,8 1766,2 1861,2 3532,4 3722,4 1728,8 1823,8 6915,2 7295,2 1747,6 1842,6 3495,2 3685,2 1766,4 1861,4 3532,8 3722,8 Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 33 Company Confidential...
Page 34 1906,0 1986,0 3812,0 3972,0 1868,6 1948,6 3737,2 3897,2 1887,4 1967,4 3774,8 3934,8 1906,2 1986,2 3812,4 3972,4 1868,8 1948,8 3737,6 3897,6 1887,6 1967,6 3775,2 3935,2 1906,4 1986,4 3812,8 3972,8 Copyright © 2003 Nokia Corporation. Page 34 Issue 1 10/2003 Company Confidential...
Page 35: Rf Tuning Instructions
RX Calibration in EGSM900 combines two alignments, VCXO calibration and AGC calibration. Calibration of GSM1800 and GSM1900 band only determines the AGC val- ues. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 35 Company Confidential...
Page 36 RX calibration EGSM900 Set operating mode to local mode. Select Maintenance Alt-M Tuning RX Calibration Wait until the RX Calibration window pops up. Select Band GSM 900 Autom.- Copyright © 2003 Nokia Corporation. Page 36 Issue 1 10/2003 Company Confidential...
Page 37 Select Automatic, press Start and a new window pops up: Select PM settings, press OK and the window closes. Now it is possible to press the Calibrate button in the RX Calibration window. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 37...
Page 38 (CMD55, CMU200, 8960, MT8801) is used, be sure to have it running in continuous mode and with modulation switched off. Press OK and the window closes. A typical result will look like this: Copyright © 2003 Nokia Corporation. Page 38 Issue 1 10/2003 Company Confidential...
Page 39 RX calibration GSM1800 Set operating mode to local mode. Select Maintenance Alt-M Tuning RX Calibration Wait until the RX Calibration window pops up. Select Band GSM 1800 Autom.- Man.- Man.- Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 39 Company Confidential...
Page 40 Select Automatic, press Start and a new window pops up: Select PM settings, press OK and the window closes. Now it is possible to press the calibrate button in the RX Calibration window. Copyright © 2003 Nokia Corporation. Page 40 Issue 1 10/2003...
Page 41 (CMD55, CMU200, 8960, MT8801) is used, be sure to have it running in continuous mode and with modulation switched off. Press ok and the window closes. A typical result will look like this: Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 41 Company Confidential...
Page 42 RX calibration GSM1900 Set operating mode to local mode. Select Maintenance Alt-M Tuning RX Calibration Wait until the RX Calibration window pops up. Select Band GSM 1900 Autom.- Man.- Man.- Copyright © 2003 Nokia Corporation. Page 42 Issue 1 10/2003 Company Confidential...
Page 43 Select Automatic, press Start and a new window pops up: Select PM settings, press OK and the window closes. Now it is possible to press the calibrate button in the RX Calibration window. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 43...
Page 44 (CMD55, CMU200, 8960, MT8801) is used, be sure to have it running in continuous mode and with modulation switched off. Press ok and the window closes. A typical result will look like this: Copyright © 2003 Nokia Corporation. Page 44 Issue 1 10/2003 Company Confidential...
Page 45: Rx Band Filter Response Compensation
Band GSM 900 Select Maintenance Alt-M Tuning RX Band Filter Response Compensation A window pops up: Select Yes and the RX Band Filter Response Compensation window pops up. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 45 Company Confidential...
Page 46 If a radio communica- tion tester (CMD55, CMU200, 8960, MT8801) is used, be sure to have it running in continuous mode and with modulation switched off. Copyright © 2003 Nokia Corporation. Page 46 Issue 1 10/2003...
Page 47 Connect an external signal generator to the RF connector of the phone and let the signal generator step through the programmed frequency list. Press OK. Press Stop, Write to PM Area (In the RX Band Filter Response Compensation window) and Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 47 Company Confidential...
Page 48 GSM 1800 Select Maintenance Alt-M Tuning RX Band Filter Response Compensation The following window pops up: Select Yes and the RX Band Filter Response Compensation window pops up. Copyright © 2003 Nokia Corporation. Page 48 Issue 1 10/2003 Company Confidential...
Page 49 If a radio communica- tion tester (CMD55, CMU200, 8960, MT8801) is used, be sure to have it running in continuous mode and with modulation switched off. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 49...
Page 50 Press OK. Press Stop, Write to PM Area (In the RX Band Filter Response Compensation window) and a window pops up: Copyright © 2003 Nokia Corporation. Page 50 Issue 1 10/2003 Company Confidential...
Page 51 Band GSM 1900 Select Maintenance Alt-M Tuning RX Band Filter Response Compensation A window pops up: Select Yes and the RX Band Filter Response Compensation window pops up. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 51 Company Confidential...
Page 52 If a radio communica- tion tester (CMD55, CMU200, 8960, MT8801) is used, be sure to have it running in continuous mode and with modulation switched off. Copyright © 2003 Nokia Corporation. Page 52 Issue 1 10/2003...
Page 53 Connect an external signal generator to the RF connector of the phone and let the signal generator step sweep through the programmed frequency list. Press OK. Press Stop, Write to PM Area (In the RX Band Filter Response Compensation window) and Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 53 Company Confidential...
Page 54: Rx Channel Select Filter Calibration
Set operating mode to local mode Select Maintenance Alt-M Tuning RX Channel Select filter Calibration A window pops up: Select Yes and the RX Channel Select Filter Calibration window pops up. Copyright © 2003 Nokia Corporation. Page 54 Issue 1 10/2003 Company Confidential...
Page 55: Rx Am Suppression - Not Needed
Limits for the GTR value = Filter adjustment value “decimal” format: Limit Limit Value Typical min. max. RX AM suppression – not needed The RH-6 RFIC Mjoelner does not require tuning of AM suppression. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 55 Company Confidential...
Page 56: Tx Power Level Tuning
Connect a calibrated power meter to the RF connector of the phone. Select Band GSM 900 Active Unit Press Start and a window pops up: Select Permanent memory, press OK and the window closes. Select TX Data Type Random Copyright © 2003 Nokia Corporation. Page 56 Issue 1 10/2003 Company Confidential...
Page 57 TX PA Mode Adjust DAC Values for Power Level 7, 15 and 19 according to target values. Press calculate, check if all levels match the target values, correct if necessary. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 57...
Page 58 Connect a calibrated power meter to the RF connector of the phone. Select Band GSM 1800 Active Unit Press Start and a window pops up: Select Permanent memory, press OK and the window closes. Select TX Data Type Random Copyright © 2003 Nokia Corporation. Page 58 Issue 1 10/2003 Company Confidential...
Page 59 (For example: If the saturation output power is only 30.7dBm, then adjust the DAC Value for Power Level 0 to 29.7dBm) Press calculate, check if all levels match the target values, correct if necessary. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 59...
Page 60 Connect a calibrated power meter to the RF connector of the phone. Select Band GSM 1900 Active Unit Press Start and a window pops up: Select Permanent memory, press OK and the window closes. Select TX Data Type Random Copyright © 2003 Nokia Corporation. Page 60 Issue 1 10/2003 Company Confidential...
Page 61 (For example: If the saturation output power is only 30.7dBm, then adjust the DAC Value for Power Level 0 to 29.7dBm) Press calculate, check if all levels match the target values, correct if necessary. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 61...
Page 62: Tx I/Q Tuning
RF Controls Wait until the RF Controls window pops up. Connect a Spectrum Analyzer or GSM tester with the option *Narrow Spectrum' to the antenna pads of the phone. Copyright © 2003 Nokia Corporation. Page 62 Issue 1 10/2003 Company Confidential...
Page 63 TX Data Type All1 Select in the TX IQ tuning window: Select Load from Product Press Start Select again in the RF Controls Window: Select TX Power Level 9 Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 63 Company Confidential...
Page 64 Use the variables 'TX I DC offset' and 'TX Q DC offset' to adjust the carrier signal to a minimum level (marker 2). Tuning is possible by using arrow keys on the keyboard. Push- ing the sliders by using the mouse is less sensitive but even possible. Copyright © 2003 Nokia Corporation. Page 64 Issue 1 10/2003...
Page 65 Pushing the sliders by using the mouse is less sensitive but even possible. After tuning to the minimum the level difference between marker 3 and the peak level at marker 1 must exceed 40dB. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 65...
Page 66 Adjust the ref- erence level offset according to the insertion loss from the phone to the spectrum analyzer. PC/Phone operation: Copyright © 2003 Nokia Corporation. Page 66 Issue 1 10/2003 Company Confidential...
Page 67 TX PA Mode Free TX Data Type All1 Select in the TX IQ Tuning Window: Select Load from Product Press Start Select again in the RF Controls Window: Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 67 Company Confidential...
Page 68 3 [T1] -10.57 dBm 1.74786771 GHz 1 [T1] 24.34 dBm 1.74773229 GHz 2 [T1] -2.92 dBm 1.74780000 GHz Center 1.7478 GHz 30 kHz/ Span 300 kHz Date: 15.JAN.2002 10:18:02 Copyright © 2003 Nokia Corporation. Page 68 Issue 1 10/2003 Company Confidential...
Page 69 Pushing the sliders by using the mouse is less sensitive but even possible. After tuning to the minimum the level difference between marker 3 and the peak level at marker 1 must exceed 40dB. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 69...
Page 71 Band GSM 1900 Active UnitTX Operation ModeBurst RX/TX Channel 661 TX PA ModeFree TX Data TypeAll1 Select in the TX IQ tuning window: Select Load from Product Press Start Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 71 Company Confidential...
Page 72 3 [T1] -12.20 dBm 1.88006771 GHz 1 [T1] 27.81 dBm 1.87993229 GHz 2 [T1] 4.13 dBm 1.88000000 GHz Center 1.88 GHz 30 kHz/ Span 300 kHz Date: 15.JAN.2002 10:53:47 Copyright © 2003 Nokia Corporation. Page 72 Issue 1 10/2003 Company Confidential...
Page 73 Pushing the sliders by using the mouse is less sensitive but even possible. After tuning to the minimum the level difference between marker 3 and the peak level at marker 1 must exceed 40dB. Copyright © 2003 Nokia Corporation. Issue 1 10/2003 Page 73...
Page 74 The GSM1800 TX IQ Tuning is now finished. Note: The optimum values for "TX I and Q Offset" and "Amplitude and Phase Differ- ence" vary from phone to phone. Copyright © 2003 Nokia Corporation. Page 74 Issue 1 10/2003...

Nokia RH-6 Series Rf Description & Troubleshooting

Quick Links

Troubleshooting

Related Manuals for Nokia RH-6 Series

Summary of Contents for Nokia RH-6 Series

Table of Contents