Nokia 6620 Service Manual 07 nhl12 RF

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Page 1

Nokia Customer Care

NHL-12 Series Transceivers

7 - RF Description &

Troubleshooting

Issue 2 10/2004 COMPANY CONFIDENTIAL

Page 2

NHL-12

Nokia Customer Care 7 - RF Description & Troubleshooting

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NHL-12 7 - RF Description & Troubleshooting Nokia Customer Care

RF Description and Troubleshooting................................................................ 4

RF key component placement ........................................................................... 4

RF measurement points..................................................................................... 5

Test points ....................................................................................................... 7

RF Implementation in NHL-12............................................................................8

RF frequency plan.............................................................................................. 8

RF power supply configuration ........................................................................ 10

Introduction to RF troubleshooting................................................................. 11

Receiver Description and Troubleshooting.................................................... 12

Receiver........................................................................................................... 12

Rx front-end..................................................................................................... 12

General instructions for Rx troubleshooting..................................................... 14

Troubleshooting charts for receiver ................................................................. 15

Troubleshooting diagram for GSM850 receiver .............................................15

Troubleshooting diagram for GSM1900 receiver ...........................................17

Transmitter Description and Troubleshooting...............................................21

Transmitter characteristics............................................................................... 21

Power amplifier................................................................................................ 21

RF ASIC Helgo ................................................................................................ 22

AFC function.................................................................................................... 22

General instructions for Tx troubleshooting ..................................................... 23

Transmitter troubleshooting diagram ............................................................. 24

Pictures of transmitter signals ........................................................................27

Additional Information on EDGE Troubleshooting........................................ 30

Pictures of EDGE transmitter signals .............................................................34

Synthesizer Description and Troubleshooting .............................................. 37

Frequency synthesizers................................................................................... 37

General instructions for synthesizer troubleshooting....................................... 40

Troubleshooting chart for PLL synthesizer ....................................................41

Frequency lists................................................................................................. 43

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NHL-12 7 - RF Description & Troubleshooting Nokia Customer Care

1. RF Description and Troubleshooting

The RF module performs the necessary high frequency operations of the GSM850/1800/1900 tripleband (EDGE) engine. Both the transmitter and receiver have been implemented by using direct conversion architecture which means that the modulator and demodulator operate at the channel frequency.

The core of the RF is an application-specific integrated circuit, Helgo. Another core component is a power amplifier module which includes two amplifier chains, one for GSM85 0 and the other for GSM1800/1900.

Other key components include:

• 26 MHz VCTCXO for frequency reference

• 3290-3980 MHz SHF VCO (super high frequency voltage controlled oscillator)

• Antenna switch module

• Four SAW filters

• Three transformer baluns

■ RF key component placement

Figure 1:RF key components

The control information for the RF is coming from the baseband section of the engine through a serial bus, referred later on as RFBus. This serial bus is used to pass the information about the frequency band, mode of operation, and synthesizer channel for the RF. In addition, exact timing information and receiver gain settings are transferred th rough the RFBus. Physically, the bus is located between the baseband ASIC called UPP and Helgo.

Using the information obtained from the UPP, Helgo controls itself to the required mode of o peration and further sends control signals to the front end and power amplifier modules. In addition to the RFBus, there are still other interface signals for the power control loop and VCTCXO control and for the modulated waveforms.

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RF circuitry is located on one side of the 8-layer PWB. The possible EMC leakage is prevented by using metal cans. The RF circuits are separated

into three blocks:

• PA, antenna switch module, Rx 1900 LNA, Rx 1900 SAW filter, Rx 1900 transformer balun, Tx 1800/1900 transformer balun and Tx 850 SAW filter

• Helgo RF IC, VCTCXO, Rx 850 SAW filter and Rx 1800 SAW filter

• VCO and transformer balun for VCO The RF transmission lines constitute of striplines and microstriplines after PA. The baseband circuitry is located on one side of the board, which is shielded with a metallized

frame and ground plane of the UI board.

■ RF measurement points

Figure 2: RF measurement points - Bottom

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Figure 3: RF measurement points - Top

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Test points

Table 1: Test points

Signal name Reference Signal name Reference

VBAT C7020 To Antenna J7100 VR1 C7306 VANT 1 C7102 VR2 C7326 VANT 2 C7101 VR3 C7201 VANT 3 C7100 VR4 C7303 RFBusEna1X R7302 VR5 C7304 RFBusData R7302 VR6 C7302 RFBusClk R7302 VR7 C2230 RESET R7302 VrefRF01 C7311 VCTCXO G7200 RFTemp C2226 Clk to BB C2902 VCO out G7201 RFout 1800/1900 Z7100 VCO VCC C7205 TXA C7313 AFC R7200 TXC C7314 RXI J7301 TXP J7303 RXQ J7300 Mode R7002 ASM out 850RX L7100/L7101 VPECTRL3 (ALC) C7329 ASM out 1800RX L7102/L7103 Iref 850 (IPA1) R7001 ASM out 1900RX C7112/C7113 Iref 1800/1900 (IPA2) R7000 LNA VCC C7109 VTXB 850 C7013 LNA P R7202 VTXB 1800/1900 C7014 TXIP / TXIN R7305 VPCTRL 850 R7003 TXQP / TXQN R7306 VPCTRL 1800/1900 R7007 PA in 850 R7005 PA in 1800/1900 L7003 RFout 850 L7004 VTXLO 850 C7320

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2. RF Implementation in NHL-12

■ RF frequency plan

RF frequency plan is shown below. The VCO operates at the channel frequency multiplied by two or four depending on the frequency band of operation. 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 4:RF Frequency plan

HELGO

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RF block diagram NHL-12

Figure 5:RF Block diagram

Helgo

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■ RF power supply configuration

Figure 6:Power distribution diagram

HELGO

LNA GSM1800/ 1900

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3. Introduction to RF troubleshooting

All measurements must be done using a spectrum analyzer with a high-frequency high-impe dance passive probe (LO-/reference frequencies and RF power levels) and an oscilloscope with a 10:1 probe (DC-voltages and low frequency signals).

The RF section is build around one RF ASIC (HELGO N7300). Before changing HELGO, please check the following things: supply voltages and serial communication coming from baseband to HELGO are both OK.

Apart from key components described in this document here are a lot of discrete components (resistors, inductors and capacitors) which troubleshooting is done by checking if soldering of the component is done properly (for factory repairs checking if it is missing from the PWB). Capacitor can be checked for shortening and resistors for value by means of an ohmmeter, but be aware that in-circuit measurements should be evaluated carefully.

Please be aware that all measured voltages or RF levels in this document are rough figures. Especially RF levels vary due to different measuring equipment or different grounding of the used probe. When using the RF probe, use metallic tweezers to connect the probe ground to the PWB ground as close to the measurement point as possible.

Please note that the grounding of the PA module is directly below PA module, therefore it is difficult to check or change. Most RF semiconductors are static discharge se nsitive! ESD protection must be taken care of during repair (ground straps and ESD soldering irons). HELGO and PA are moisture sensitive which means that parts must be pre-baked prior to soldering.

For easier troubleshooting, this RF troubleshooting document is divided into sections.

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4. Receiver Description and Troubleshooting

■ Receiver

Each receiver path is a direct conversion linear receiver. From the antenna, the received RF signal is fed to a front end module where a diplexer first divides the signal into three separate paths according to the band of operation: either lower GSM850 or upper GSM1800 or GSM1900 path.

Most of the receiver circuitry is included in Helgo.

■ Rx front-end

The front-end features include:

• Antenna 50 ohm input

• Rx GSM850, GSM1800 and GSM 1900 50 ohms inputs

• Txs single 50 ohm input

• 3 control lines from the Helgo

Figure 7: Front-end

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Receiver characteristics

Item Values, GSM850/1800/1900

Type Direct conversion, Linear, FDMA/TDMA LO frequencies 3476...3576 MHz / 3610...3760 MHz/

3860...3980 MHz Typical 3 dB bandwidth +/- 91 kHz Sensitivity min. - 102 dBm (normal condition) Total typical receiver voltage gain (from

antenna to Rx ADC) Receiver output level (RF level -95 dBm) 230 mVpp, single-ended I/Q signals to Rx

Typical AGC dynamic range 83 dB Accurate AGC control range 60 dB Typical AGC step in LNA 30 dB GSM1800/1900 25 dB GSM850 Usable input dynamic range -102... -10 dBm RSSI dynamic range -110... -48 dBm Compensated gain variation in receiving band +/- 1.0 dB

86 dB

ADCs

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■ General instructions for Rx troubleshooting

1. Connect the test jig (MJ-13) to a computer with a DAU-9S cable or to a FPS-8 flash prommer with an XCS-4 modular cable.

Make sure that you have PKD-1 dongle connected to the computer’s parallel port.

2. Connect a DC power supply to the module test jig with a PCS-1 cable.

3. Set the jumper connector on test jig to “regulator” position and set the DC supply voltage to 6V (test jig has internal voltage regulator of output voltage 4V).

4. Connect an RF cable to the module test jig’s (MJ-13) RF connector and to RF signal generator.

5. Set the phone module to test jig and start Phoenix service software.

6. Initialize connection to the phone. (Use FBUS driver when using DAU9S and COMBOX driver when using FPS-8).

7. Choose product from the menu: File -> Choose Product -> NHL-12.

8. From the toolbar, set operating mode to "Local".

9. Activate the RF Controls window from the menu: Testing -> RF Controls.

In the RF Controls window:

• Select band "GSM850", "GSM 1800" or “GSM1900” (Default = "GSM850").

• Set Active unit to "Rx" (Default = "Rx").

• Set Operation mode to "Burst" (Default = "Burst").

For continuous mode:

• Set Operation mode to "Continuous".

• Set AGC to "12: FEG_ON + DTOS_ON + BB_30=Vgain60” (maximum gain setting used in normal mode).

• (Default = "14: FEG_ON + DTOS_ON + BB_42=Vgain72").

• Set Rx/Tx channel to 190 on GSM850 band, 700 on GSM1800 band or 661 on GSM1900 (Defaults).

• Apply

881.6671 MHz (channel 190 + 67.710 kHz offset)

1842.86771 MHz (channel 700 + 67.710 kHz offset)

1960.06771 MHz (channel 661 + 67.71 kHz) –90 dBm signal to the RF connector (remember to compensate for cable attenua-

tion).

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■ T roubleshooting charts for receiver

Troubleshooting diagram for GSM850 receiver

Phone in “Continuous” mode, AGC setting “12”.

Apply –90dBm

881.66771MHz signal from generator to antenna connector

NHL-12

Yes

Oscilloscope at RX_I Signal 700mVpp DC offset 1.35V*** Frequency 67.7kHz

Yes

850RX chain functional

Change generator level to –50dBm

Spectrum analyzer Antenna switch outputs, GSM850 –88 dBm

Yes

Spectrum analyzer HELGO inputs GSM850 –89 dBm

NoYes

Spectrum analyzer Antenna switch input –84 dBm

Yes

Oscilloscope VANT_1...3 0V

Yes

Check Antenna

switch Z7100

Check L7100, L7101, Z7101

Check X7100,

C7103

NoNo

Oscilloscope: Check HELGO serial interface (burst mode)

Yes

Check HELGO N7300

All spectrum analyzer reading values are measured with

2.5 kohm passive probe (use tweezers to connect the probe ground to the nearest PWB ground). Reading value is represented without +34 dB compensation.

Check Baseband

Yes

Oscilloscope

VR1 4.8V and VR3..6 2.8V

Check HELGO serial interface (burst mode)

Spectrum analyzer 4G VCO out

3526.4MHz ∼–30 dBm (*

Yes

Check HELGO N7300

Check Baseband

Synthesizer troubleshooting

* Spectrum analyzer reading with 1 kohm passive probe (right value add +34 dB)

* ** DC–level of RXI/RXQ in continuous mode will decrease slowly. The original level can be restored by rewriting gain set.

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Troubleshooting diagram for GSM1800 receiver

Phone in “Continuous” mode, AGC setting “12”.

Apply –90dBm

1842.86771MHz signal from generator to antenna connector

NoNoYesNoYes

Oscilloscope at RX_I Signal 140mVpp DC offset 1.35V *** Frequency 67.7kHz

Yes

Change generator level to –50dBm

Spectrum analyzer Antenna switch outputs, 1800 LNA out –61 dBm

Spectrum analyzer

Antenna switch input

-84 dBm

Check X7100,

C7103

GSM1800 RX chain functional

Yes

Spectrum analyzer HELGO inputs GSM 1800 –88 dBm

Yes

Oscilloscope

VR1 4.8V and VR3..6 2.8V

Check HELGO serial interface (burst mode)

Yes

Oscilloscope VANT_1...3 0V

Check Antenna switch Z7100

Check L7102, L7103, Z7102 C837,

V801

Yes

Check Baseband

Oscilloscope Check HELGO serial interface (burst mode)

Check HELGO N7300

Yes

All spectrum analyzer reading values are measured with 1 kohm passive probe (use tweezers to connect the probe ground to the nearest PWB ground). Reading value is represented without +26 dB compensation.

* Spectrum analyzer reading with 1 kohm passive probe (right value add +26 dB)

NoNo

Check Baseband

Spectrum analyzer 4G VCO out

3685.6MHz ∼–30 dBm (*

Yes

Check HELGO N7300

Synthesizer troubleshooting

* ** DC–level of RXI/RXQ in continuous mode will decrease slowly. The original level can be restored by rewriting gain set.

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Troubleshooting diagram for GSM1900 receiver

Phone in “Continuous” mode, AGC setting “12”.

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When measuring with an oscilloscope on "RXI" or "RXQ", the following screens should be seen on a working GSM850, GSM1800 or GSM1900 receiver:

Figure 8:Rx I/Q signal, burst mode, input level –90dBm.

Figure 8, “Rx I/Q signal, burst mode, input level –90dBm.” :

Receiver I or Q burst mode signal (channel 190) measured from test point RXI or RXQ with

881.6671 MHz signal, input level –90dBm at RF-connector. Correct signal amplitudes approximately:

GSM850~170mVpp 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 I and Q signals and

between different bands as well.

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Figure 9:GSM1900 Rx I or Q signal (trace2), burst mode.

Figure 9, “GSM1900 Rx I or Q signal (trace2), burst mode.” :

GSM1900 receiver burst mode I or Q signal at ch 661 with input signal 1960.067MHz, level –90

dBm at RF-connector.

Trace2: Wi th wide r time scaling both mon itoring and own Rx bur sts are seen, 1

is monitoring and 2

Trace1: External LNA VCC supply voltage at burst mode, input level –90 dBm. Measured from

burst (longer) is own Rx burst.

test point LNA_VCC.

burst (shorter)

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Figure 10: Rx I&Q, phase difference 90 deg between signals.

Figure 10, “Rx I&Q, phase difference 90 deg between signals.” :

Detailed view of GSM850 continuous mode Rx I and Q signals measured from test points RXI

and RXQ simultaneously.

Used channel 190, input signal 881.6671 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.

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5. Transmitter Description and Troubleshooting

The transmitter consists of two final frequency IQ-modulators and a power amplifier (separate ones for the lower and upper bands), and a power control loop . The IQ-modulators are integrated in Helgo, as well as the operational amplifiers of the power control loop. The two power amplifiers are located in a single module with a power detector. In the GMSK mode, the power is controlled by adjusting the DC bias levels of the power amplifiers.

■ T ransmitter characteristics

Item Values (GSM850/1800/1900)

Type Direct conversion, nonlinear, FDMA/

TDMA

LO frequency range 3296...3396 MHz/3420...3570 MHz/

3700...3820 MHz

Output power GMSK 33/30/30 dBm

8-PSK 27/26/26 dBm Gain control range min. 30 dB Phase error (RMS/peak), GMSK

EVM (RMS/peak), 8-PSK

5 deg./20 deg. peak

10%/30%

■ Power amplifier

The power amplifier features include:

• 50 ohm input and output, GSM850/1800/1900

• internal power detector

• EDGE mode

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Figure 11:Power amplifier

GSM850

EGSM out

GSM1800/

DCS/

1900

PCS out

GSM850

EGSM Power control

GSM1800/ 1900

DCS/PCS Power control

GSM850

EGSM in

GSM1800/

DCS/

1900

PCS in

Power detector

Mode

■ RF ASIC Helgo

The RF ASIC features include:

• Package uBGA108

• Balanced I/Q demodulator and balanced I/Q modulator

• Power control operational amplifier, acting as an error amplifier

• Balanced signal from VCO, frequencies 3420 to 3980 MHz

• Integrated GSM850 and GSM1800 low noise amplifiers (LNAs)

• Helgo testing via test points only

■ AFC function

AFC is used to lock the transceiver’s clock to the base station frequency.

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■ General instructions for Tx troubleshooting

For a description of the test setup, refer to the Service Software Section, Service Concept diagram.

1. Connect a test jig to the computer with a DAU-9S cable or to a FPS-8 flash prommer with an XCS-4 modular cable.

• Make sure that you have PKD-1 dongle connected to the computer’s parallel po rt.

2. Connect a DC power supply to module test jig with a PCS-1 cable.

3. Set the DC supply voltage to 4.2V and set the jumper connector on test jig to "bypass" position.

Attention: When repairing or tuning transmitter use an external DC supply with at least 3A current capability.

4. Connect an RF cable to the module test jig’s (MJS-13) RF connector and to measurement equipment or at least a 10dB attenuator, otherwise the PA may be damaged.

Use a spectrum analyzer as measurement equipment.

Attention: Normally Spectrum analyzer maximum input power is +30dBm. It is recommended to use 10dB attenuator on the spectrum analyzer input to prevent any damage.

5. Set the phone module to test jig and start Phoenix service software.

6. Initialize connection to the phone. (Use FBUS driver when using DAU-9S and COMBOX driver when using FPS-8).

7. Select product from the menu: File -> Choose Product -> NHL-12.

8. From the toolbar, set operating mode to "Local".

9. Activate the RF Controls window from the menu: Testing -> RF Controls.

In the RF Controls window:

• Select band "GSM850" or "GSM 1800" or "GSM1900" (Default = "GSM850").

• Set Active unit to "Tx" (Default = "Rx").

• Set Operation mode to "Burst" (Default = "Burst").

• Set Tx data type to "Random" (Default = "All1").

• Set Rx/Tx channel to 190 on GSM850 band or 700 on GSM1800 band or 661 on GSM1900 (Defaults).

• Set Tx PA mode to "Free" (Default).

• Set power level to 5 (Default = 19) on GSM850 o r to 0 (Default = 15) on GSM1800 or GSM1900.

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Transmitter troubleshooting diagram

Figure 12:Transmitter troubleshooting

Yes

Yes No

Check output signal level: +32…+33dBm@836.6MHz(GSM850)

+29…+30.5dBm@1747.8 and 1880MHz (GSM1800&1900)

OK?

No No Yes

Yes No

Check with RF probe signal level on PA input: >=0dBm

OK?

Yes

Start TX power level tuning and check tuned coefficien values:

Yes

Highest level ~0.750…0.930(GSM850); ~0.600…0.800(GSM1800&1900)

Lowest level ~0.150…0.170(GSM850); ~0.148…0.175(GSM1800&1900) Base level ~0.125…0.145(GSM850); ~0125…0.145(GSM1800&1900)

Major differences?

Yes

Check control voltage with oscilloscope:

PA Ctrl voltage >1.5V peak OK?

Yes No

TX Troubleshooting

TX signal found?

PA & ant switch troubleshooting

TX OK

Check all power levels, OK?

Check output signal on 500MHz span Signal found on incorrect frequency?

Helgo troubleshooting

Yes

Check control loop components OK?

Replace faulty components

Tune TX power levels, OK?

Synthesizer troubleshooting

Tune TX DAC values

Replace Helgo

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Figure 13:Helgo IC troubleshooting

Helgo troubleshooting

Check with oscilloscope:

-TXI/TXQ signals

-VR1 = 4.8V and VR2, VR4, VR5, VR6 =2.8V

-VrefRF01 = 1.35V

-Helgo serial interface

-TXP & TXC signals

OK?

Yes

Check with RF probe: 4G VCO signal output:

-3346.4MHz (GSM850)

-3495.6MHz (GSM1800)

-3760MHz (GSM1900) Level > - 10dBm OK?

Yes

Check modulator output components OK?

Replace faulty component(s)

Baseband troubleshooting

Synthesizer troubleshooting

Replace HELGO

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Figure 14:PA and antenna switch troubleshooting

PA & ant switch troubleshooting

Check with RF probe signal level on PA input >= 0dBm OK?

Yes No

Check with oscilloscope:

-VBATT ~4V

-VTXB = 2.8V pulsed

-VPCTRL_850/1800/1900 OK?

Yes No

Yes

Replace PA

Check components around PA OK?

Yes Yes

Yes

Check with oscilloscope:

-VANT1 (GSM850)

-VANT2 (GSM1800)

-VANT3 (GSM1900) OK?

Check VANT line components OK?

Replace HELGO

Replace ant. switch

Replace faulty component(s)

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Pictures of transmitter signals

VPCTRL 850 at GSM850 VPCTRL 1800/1900 at GSM1800

VTXB 850 at GSM850 VTXB 1800/1900 at GSM1800

TXC at GSM850 TXC at GSM1900

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TXP at GSM850 TXP at GSM1900

TX I/Q at GSM850 TX I/Q at GSM1800

VANT1 at GSM850 (TX) VANT3 at GSM1900 (TX)

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RFout at GSM850

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6. Additional Information on EDGE Troubleshooting

Note! EDGE mode troubleshooting differs slightly from basic GSM troubleshooting.

1. Establish connection to the phone normally (see GSM850/1800/1900 troubleshooting instructions).

2. Select product from the menu: File -> Choose Product -> NHL-12.

3. From the toolbar, set operating mode to “Local”.

4. Activate the RF Controls window from the menu: Testing -> RF Controls.

In the RF Controls window:

• Select Band “GSM850” or “GSM1800” or “GSM1900” (Default=”GSM850”).

• Set Active unit to “Tx” (Default=”Rx”).

• Set Edge “On” (Default=”Off”).

• Set Operation mode to “Burst” (Default=”Burst”).

• Set Tx data type to “Alternate PN9” (Default=”All1”).

Note! In EDGE tuning, set data type to "All 0's". If you are using "Alternate PN9", you need to tune power levels 1dBm lower than the target levels.

• Set Rx/Tx channel to 190 on GSM850 or 700 on GSM1800 or 661 on GSM1900 (Defaults).

• Set power level to 8 (Default = 19) on GSM850 or to 2 (Default = 0) on GSM1800 or GSM1900.

NOTE! For GSM850 EDGE power levels 5, 6 and 7 are not in us e and fo r GS M 180 0&1 9 00 EDGE power levels 0 and 1 are not in use.

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Figure 15:Transmitter EDGE troubleshooting

TX EDGE Troubleshooting

Yes

Yes No

Check output signal level: +24…+30dBm@897.4MHz(GSM900)

+24...+30dBm@836.6MHz(GSM850)

+22…+29dBm@1747.8 and 1880MHz

+24...30dBm@897.4MHz(GSM900)

(GSM1800&1900)

+22...+29dBm@1747.8and 1880MHz

OK?

(GSM1800/1900)

No No Yes

Yes No

Check with RF probe signal level on PA input:

~-8dBm@PCL=8 (GSM900 ~-10dBm@PCL=2 (GSM1800&1900) OK?

Yes

Start TX Edge power level tuning and check tuned coefficient values: Highest level ~700…800(GSM900); ~630…730(GSM1800&1900)

Highest level~0.750...0.930(GSM850);~0.690...0.900(GSM1800&1900)

Yes

Lowest level ~340…410(GSM900); ~250…360(GSM1800&1900)

Lowest level~0.420...0.550(GSM850);~0.350...0.470(GSM1800&1900)

Base level ~190…260(GSM900); ~150…250(GSM1800&1900)

Base level~0.200...0.400(GSM850);~0.210...0.410(GSM1800&1900)

Major differences?

Check control voltages with

Yes

oscilloscope: Pa Iref ~2V peak (GSM900

Pa Iref ~2.1V peak (GSM1800@1900) Mode ~1.8V OK?

Yes No

PA & ant switch EDGE troubleshooting

OK?

TX signal found?

(GSM850)

Yes

TX OK

Check all power levels, OK?

Check output signal on 500MHz span Signal found on incorrect frequency?

Helgo EDGE troubleshooting

Check EDGE control loop components OK?

Replace faulty components

Tune TX power levels, OK?

Synthesizer troubleshooting

Tune TX DAC values

Replace Helgo

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Figure 16:Helgo EDGE troubleshooting

Check with oscilloscope:

-TXI/TXQ signals

-VR1 = 4.8V and VR2, VR4, VR5, VR6 = 2.8V

-VrefRF01 = 1.35V

-Helgo serial interface

-TXP & TXC & TXA

OK?

Yes

Check with RF probe: 4G VCO signal output:

-3346.4MHz(GSM850)

-3589.6MHz (GSM900)

-3495.6MHz(GSM1800)

-4495.6MHz (GSM1800)

-3760MHz(GSM1900)

-376Hz (GSM1900)

-3760MHz(GSM1900)

Level > - 10dBm

OK?

Yes

Check modulator output components and VPECTRL3 signal

Helgo EDGE troubleshooting

OK?

Replace faulty component(s)

Baseband troubleshooting

Synthesizer troubleshooting

Replace HELGO

Issue 2 10/2004 COMPANY CONFIDENTIAL 33

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Nokia Customer Care 7 - RF Description & Troubleshooting

Figure 17:PA & ant switch EDGE troubleshooting

34 COMPANY CONFIDENTIAL Issue 2 10/2004

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NHL-12 7 - RF Description & Troubleshooting Nokia Customer Care

Pictures of EDGE transmitter signals

VPECTRL3 at EDGE850 VPECTRL3 at EDGE1900

VTXB 850 at EDGE850 VTXB 1800/1900 at EDGE1900

Mode at EDGE850 Mode at EDGE1900

Issue 2 10/2004 COMPANY CONFIDENTIAL 35

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Nokia Customer Care 7 - RF Description & Troubleshooting

TXA at EDGE850 TXA at EDGE1900

NHL-12

TXC at EDGE850 TXC at EDGE1900

TXP at EDGE850 TXP at EDGE1900

36 COMPANY CONFIDENTIAL Issue 2 10/2004

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NHL-12 7 - RF Description & Troubleshooting Nokia Customer Care

Iref 850 at EDGE850 Iref 1800/1900 at EDGE1900

TX I/Q at EDGE850 TX I/Q at EDGE1900

VANT1 at EDGE850 (TX) VANT3 at EDGE1900 (TX)

Issue 2 10/2004 COMPANY CONFIDENTIAL 37

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Nokia Customer Care 7 - RF Description & Troubleshooting

7. Synthesizer Description and Troubleshooting

One PLL synthesizer is generating all the required frequencies for both Rx and Tx and for all three bands (GSM850/1800/1900).

■ Frequency synthesizers

The VCO frequency is locked by a PLL (phase locked loop) in to a stable frequency so urce given by a VCTCXO which is running at 26 MHz. The frequency of the VCTCXO is in turn locked into the base station frequency with the help of an AFC voltage that is generated in the UEM by an 11 bit D/A converter. The PLL is located in Helgo and it is controlled through the RFBus.

The required frequency dividers for modulator and demodulator mixers are integrated in Helgo. Loop filter filters out the comparison pulses of the phase detector and generates a DC control

voltage to the VCO. The loop filter determines the step response of the PLL (settling time) and contributes to the stability of the loop.

The frequency synthesizer is integrated in Helgo except for the VCTCXO, VCO, and the loop filter.

Table 2: 26 MHz reference oscillator (VCTCXO)

Parameter Min Typ Max

Supply voltage, Vcc 2.60 2.70 2.80 V Current consumption, Icc 1.5 mA Operating temperature range -30 +80 deg. C Nominal frequency 26 MHz Output voltage swing, Vcc=2.6V

Temp=-20...+7 5deg. C (swing of the 26MHz component, a selective measurement from the spectrum)

Load, resistance capacitance

Frequency tolerance @+25deg. C with internal frequency tuning no tuning

Frequency tolerance after reflow (@+25deg. C)

0.8 Vpp

2 10

-1.0

-10

-1.0 +1.0 ppm

+1.0 +10

Unit/

Notes

kohm pF

ppm ppm

Frequency stability vs. temperature

(ref. @+25, -20....+75deg. C)

Frequency stability vs. supply voltage (2.7V +/- 100mV)

38 COMPANY CONFIDENTIAL Issue 2 10/2004

-5.0 +5.0 ppm

-0.2 +0.2 ppm

Page 39

NHL-12 7 - RF Description & Troubleshooting Nokia Customer Care

Table 2: 26 MHz reference oscillator (VCTCXO)

Parameter Min Typ Max

Frequency stability vs. load change (2kohm//10pF +/-10%)

Aging -1.0 +1.0 ppm/

Control voltage, Vc 0.3 1.3 2.3 V Control voltage slope, 0.3V<Vc<2.3V

with internal frequency tuning no tuning.

Control input resistance 1 Mohm Harmonics -8 dBc Duty Cycle 40 60 %,

Start up time output level within 90% and output frequency limits +/-0.1ppm from the final value

-0.3 +0.3 ppm

+/-9 +/-18

+/-16 +/-30

5 ms

Unit/

Notes

year

ppm/V ppm/V

(T+)/ (Ttotal)

Frequency dips at any initial frequency Temp=-20...+7 5deg. C Vcc=2.6...2.8V Vc=0.3...2.3V

Phase noise @1kHz offset -130 dBc/Hz

Table 3: VCO

Parameter Conditions Min Nom Max Unit

Supply voltage, Vcc 2.55 2.70 2.85 V Current consumption, Icc 20 mA Control voltage, Vc 0.7 3.8 V Oscillation frequency Vc=0.7V

Vc=3.8V

Tuning voltage at the center frequency

Tuning voltage sensitivity in operating frequency range at each spot freq.

f=3635MHz Vcc=2.7V Temp=+25C

-0.5 0.5 ppm

3290 MHz

3980

2.0 2.25 2.5 V

225 250 275 MHz/V

MHz

Issue 2 10/2004 COMPANY CONFIDENTIAL 39

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Nokia Customer Care 7 - RF Description & Troubleshooting

Table 3: VCO

Parameter Conditions Min Nom Max Unit

Output power level -3.0 dBm Output impedance

VSWR Phase noise, fo +/- 25

kHz fo +/- 600 kHz fo +/- 1600 kHz fo +/- 3000 kHz fo +/- 20000 kHz

Pulling figure VSWR=2, any

phase

Pushing figure Vcc=2.7+/-

0.15V

Frequency stability over temperature range

Harmonics -15 dBc Spurious levels -70 dBc Input capacitance at Vc-

Temp=-

10...+75deg. C

Vc=0V 30 pF

-5.0 +5.0 MHz

-1.5 +1.5 MHz

-15.0 +15.0 MHz

2.0

-90

-116

-126

-136

-152

ohm

dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz

40 COMPANY CONFIDENTIAL Issue 2 10/2004

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NHL-12 7 - RF Description & Troubleshooting Nokia Customer Care

■ General instructions for synthesizer troubleshooting

Checking synthesizer operation

1. Connect a test jig to the computer with a DAU-9S cable or to a FPS-8 flash prommer with an XCS-4 modular cable.

• Make sure that you have a PKD-1 dongle connected to the computer’s parallel port.

2. Connect a DC power supply or FPS-8 to the module test jig with a PCS-1 cable.

3. Set the DC supply voltage to 3.9V and set the jumper connector on test jig to "bypass" position.

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).

6. Select product from the menu: File -> Choose Product -> NHL-12.

7. From the toolbar, set operating mode to "Local".

8. Activate the RF Controls window from the menu: Testing -> RF Controls

In the RF Controls window:

• Select band "GSM850", "GSM 1800" or "GSM1900" (Default = "GSM850").

• Set Active unit to "Rx" (Default = "Rx").

• Set Operation mode to "Continuous" (Default = "Burst").

• Set Rx/Tx channel to 190 on GSM850 band, 700 on GSM1800 band, 661 on GSM1900 band (Defaults).

Issue 2 10/2004 COMPANY CONFIDENTIAL 41

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Nokia Customer Care 7 - RF Description & Troubleshooting

Troubleshooting chart for PLL synthesizer

Figure 18:Frequency synthesizer troubleshooting

Synthesizer

troubleshooting

*(When 2.5kOhm passive probe is used,

Yes

correct the measurement by +34 dB

Set with RF controls: Active Unti = Rx Operation mode = Continuous

Check with RF probe:

- 4G VCO out signal

- 3526.4 MHz (GSM850)

- 3685.6 MHz (GSM1800)

- 3920 MHz (GSM1900) Level >-10dBm (*

OK ?

VCO out signal level<-10dBm

Check output signal on 1 GHz span Signal found on incorrect frequency ?

Yes

Synthesizer OK

Yes

Check with oscilloscope:

-4G VCO Vcc = 2.8V

Check balun output levels and solder joints OK ?

Replace faulty component(s)

OK ?

Yes

Baseband troubleshooting

Replace VCO

Check with oscilloscope: VCO control voltage from VCO pin

0V ?

Check with oscilloscope: VCO control voltage

from VCO pin >4.0 V ?

Yes

Check balun output levels and solder joints OK ?

Yes

Check VCO control loop components

Yes

OK ?

Replace VCO

Replace faulty component(s)

42 COMPANY CONFIDENTIAL Issue 2 10/2004

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NHL-12 7 - RF Description & Troubleshooting Nokia Customer Care

Pictures of synthesizer signals

VCTCXO at GSM1900 (RX) Clk to BB at GSM1900 (RX)

VCO out at GSM850 (TX)

Issue 2 10/2004 COMPANY CONFIDENTIAL 43

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Nokia Customer Care 7 - RF Description & Troubleshooting

■ Frequency lists

GSM850

CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX

128 824.2 869.2 3296.8 3476.8 170 832.6 877.6 3330.4 3510.4 212 841.0 886.0 3364.0 3544.0 129 824.4 869.4 3297.6 3477.6 171 832.8 877.8 3331.2 3511.2 213 841.2 886.2 3364.8 3544.8 130 824.6 869.6 3298.4 3478.4 172 833.0 878.0 3332.0 3512.0 214 841.4 886.4 3365.6 3545.6 131 824.8 869.8 3299.2 3479.2 173 833.2 878.2 3332.8 3512.8 215 841.6 886.6 3366.4 3546.4 132 825.0 870.0 3300.0 3480.0 174 833.4 878.4 3333.6 3513.6 216 841.8 886.8 3367.2 3547.2 133 825.2 870.2 3300.8 3480.8 175 833.6 878.6 3334.4 3514.4 217 842.0 887.0 3368.0 3548.0 134 825.4 870.4 3301.6 3481.6 176 833.8 878.8 3335.2 3515.2 218 842.2 887.2 3368.8 3548.8 135 825.6 870.6 3302.4 3482.4 177 834.0 879.0 3336.0 3516.0 219 842.4 887.4 3369.6 3549.6 136 825.8 870.8 3303.2 3483.2 178 834.2 879.2 3336.8 3516.8 220 842.6 887.6 3370.4 3550.4 137 826.0 871.0 3304.0 3484.0 179 834.4 879.4 3337.6 3517.6 221 842.8 887.8 3371.2 3551.2 138 826.2 871.2 3304.8 3484.8 180 834.6 879.6 3338.4 3518.4 222 843.0 888.0 3372.0 3552.0 139 826.4 871.4 3305.6 3485.6 181 834.8 879.8 3339.2 3519.2 223 843.2 888.2 3372.8 3552.8 140 826.6 871.6 3306.4 3486.4 182 835.0 880.0 3340.0 3520.0 224 843.4 888.4 3373.6 3553.6 141 826.8 871.8 3307.2 3487.2 183 835.2 880.2 3340.8 3520.8 225 843.6 888.6 3374.4 3554.4 142 827.0 872.0 3308.0 3488.0 184 835.4 880.4 3341.6 3521.6 226 843.8 888.8 3375.2 3555.2 143 827.2 872.2 3308.8 3488.8 185 835.6 880.6 3342.4 3522.4 227 844.0 889.0 3376.0 3556.0 144 827.4 872.4 3309.6 3489.6 186 835.8 880.8 3343.2 3523.2 228 844.2 889.2 3376.8 3556.8 145 827.6 872.6 3310.4 3490.4 187 836.0 881.0 3344.0 3524.0 229 844.4 889.4 3377.6 3557.6 146 827.8 872.8 3311.2 3491.2 188 836.2 881.2 3344.8 3524.8 230 844.6 889.6 3378.4 3558.4 147 828.0 873.0 3312.0 3492.0 189 836.4 881.4 3345.6 3525.6 231 844.8 889.8 3379.2 3559.2 148 828.2 873.2 3312.8 3492.8 190 836.6 881.6 3346.4 3526.4 232 845.0 890.0 3380.0 3560.0 149 828.4 873.4 3313.6 3493.6 191 836.8 881.8 3347.2 3527.2 233 845.2 890.2 3380.8 3560.8 150 828.6 873.6 3314.4 3494.4 192 837.0 882.0 3348.0 3528.0 234 845.4 890.4 3381.6 3561.6 151 828.8 873.8 3315.2 3495.2 193 837.2 882.2 3348.8 3528.8 235 845.6 890.6 3382.4 3562.4 152 829.0 874.0 3316.0 3496.0 194 837.4 882.4 3349.6 3529.6 236 845.8 890.8 3383.2 3563.2 153 829.2 874.2 3316.8 3496.8 195 837.6 882.6 3350.4 3530.4 237 846.0 891.0 3384.0 3564.0 154 829.4 874.4 3317.6 3497.6 196 837.8 882.8 3351.2 3531.2 238 846.2 891.2 3384.8 3564.8 155 829.6 874.6 3318.4 3498.4 197 838.0 883.0 3352.0 3532.0 239 846.4 891.4 3385.6 3565.6 156 829.8 874.8 3319.2 3499.2 198 838.2 883.2 3352.8 3532.8 240 846.6 891.6 3386.4 3566.4 157 830.0 875.0 3320.0 3500.0 199 838.4 883.4 3353.6 3533.6 241 846.8 891.8 3387.2 3567.2 158 830.2 875.2 3320.8 3500.8 200 838.6 883.6 3354.4 3534.4 242 847.0 892.0 3388.0 3568.0 159 830.4 875.4 3321.6 3501.6 201 838.8 883.8 3355.2 3535.2 243 847.2 892.2 3388.8 3568.8 160 830.6 875.6 3322.4 3502.4 202 839.0 884.0 3356.0 3536.0 244 847.4 892.4 3389.6 3569.6 161 830.8 875.8 3323.2 3503.2 203 839.2 884.2 3356.8 3536.8 245 847.6 892.6 3390.4 3570.4 162 831.0 876.0 3324.0 3504.0 204 839.4 884.4 3357.6 3537.6 246 847.8 892.8 3391.2 3571.2 163 831.2 876.2 3324.8 3504.8 205 839.6 884.6 3358.4 3538.4 247 848.0 893.0 3392.0 3572.0 164 831.4 876.4 3325.6 3505.6 206 839.8 884.8 3359.2 3539.2 248 848.2 893.2 3392.8 3572.8 165 831.6 876.6 3326.4 3506.4 207 840.0 885.0 3360.0 3540.0 249 848.4 893.4 3393.6 3573.6 166 831.8 876.8 3327.2 3507.2 208 840.2 885.2 3360.8 3540.8 250 848.6 893.6 3394.4 3574.4 167 832.0 877.0 3328.0 3508.0 209 840.4 885.4 3361.6 3541.6 251 848.8 893.8 3395.2 3575.2 168 832.2 877.2 3328.8 3508.8 210 840.6 885.6 3362.4 3542.4 169 832.4 877.4 3329.6 3509.6 211 840.8 885.8 3363.2 3543.2

44 COMPANY CONFIDENTIAL Issue 2 10/2004

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NHL-12

7 - RF Description & Troubleshooting Nokia Customer Care

GSM1800

CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX

1710.2 1805.2 3420.4 3610.4

512

1710.4 1805.4 6841.6 7221.6

513

1710.6 1805.6 6842.4 7222.4

514

1710.8 1805.8 6843.2 7223.2

515

1711.0 1806.0 6844.0 7224.0

516

1711.2 1806.2 6844.8 7224.8

517

1711.4 1806.4 6845.6 7225.6

518

1711.6 1806.6 6846.4 7226.4

519

1711.8 1806.8 6847.2 7227.2

520

1712.0 1807.0 6848.0 7228.0

521

1712.2 1807.2 6848.8 7228.8

522

1712.4 1807.4 6849.6 7229.6

523

1712.6 1807.6 6850.4 7230.4

524

1712.8 1807.8 6851.2 7231.2

525

1713.0 1808.0 6852.0 7232.0

526

1713.2 1808.2 6852.8 7232.8

527

1713.4 1808.4 6853.6 7233.6

528

1713.6 1808.6 6854.4 7234.4

529

1713.8 1808.8 6855.2 7235.2

530

1714.0 1809.0 6856.0 7236.0

531

1714.2 1809.2 6856.8 7236.8

532

1714.4 1809.4 6857.6 7237.6

533

1714.6 1809.6 6858.4 7238.4

534

1714.8 1809.8 6859.2 7239.2

535

1715.0 1810.0 6860.0 7240.0

536

1715.2 1810.2 6860.8 7240.8

537

1715.4 1810.4 6861.6 7241.6

538

1715.6 1810.6 6862.4 7242.4

539

1715.8 1810.8 6863.2 7243.2

540

1716.0 1811.0 6864.0 7244.0

541

1716.2 1811.2 6864.8 7244.8

542

1716.4 1811.4 6865.6 7245.6

543

1716.6 1811.6 6866.4 7246.4

544

1716.8 1811.8 6867.2 7247.2

545

1717.0 1812.0 6868.0 7248.0

546

1717.2 1812.2 6868.8 7248.8

547

1717.4 1812.4 6869.6 7249.6

548

1717.6 1812.6 6870.4 7250.4

549

1717.8 1812.8 6871.2 7251.2

550

1718.0 1813.0 6872.0 7252.0

551

1718.2 1813.2 6872.8 7252.8

552

1718.4 1813.4 6873.6 7253.6

553

1718.6 1813.6 6874.4 7254.4

554

1718.8 1813.8 6875.2 7255.2

555

1719.0 1814.0 6876.0 7256.0

556

1719.2 1814.2 6876.8 7256.8

557

1719.4 1814.4 6877.6 7257.6

558

1719.6 1814.6 6878.4 7258.4

559

1719.8 1814.8 6879.2 7259.2

560

1720.0 1815.0 6880.0 7260.0

561

1720.2 1815.2 6880.8 7260.8

562

1720.4 1815.4 6881.6 7261.6

563

1720.6 1815.6 6882.4 7262.4

564

1720.8 1815.8 6883.2 7263.2

565

1721.0 1816.0 6884.0 7264.0

566

1721.2 1816.2 6884.8 7264.8

567

1721.4 1816.4 6885.6 7265.6

568

1721.6 1816.6 6886.4 7266.4

569

1721.8 1816.8 6887.2 7267.2

570

1722.0 1817.0 6888.0 7268.0

571

1722.2 1817.2 6888.8 7268.8

572

1722.4 1817.4 6889.6 7269.6

573

1722.6 1817.6 6890.4 7270.4

574

575

1722,8 1817,8 6891,2 7271,2

576

1723,0 1818,0 6892,0 7272,0

577

1723,2 1818,2 6892,8 7272,8

578

1723,4 1818,4 6893,6 7273,6

579

1723,6 1818,6 6894,4 7274,4

580

1723,8 1818,8 6895,2 7275,2

581

1724,0 1819,0 6896,0 7276,0

582

1724,2 1819,2 6896,8 7276,8

583

1724,4 1819,4 6897,6 7277,6

584

1724,6 1819,6 6898,4 7278,4

585

1724,8 1819,8 6899,2 7279,2

586

1725,0 1820,0 6900,0 7280,0

587

1725,2 1820,2 6900,8 7280,8

588

1725,4 1820,4 6901,6 7281,6

589

1725,6 1820,6 6902,4 7282,4

590

1725,8 1820,8 6903,2 7283,2

591

1726,0 1821,0 6904,0 7284,0

592

1726,2 1821,2 6904,8 7284,8

593

1726,4 1821,4 6905,6 7285,6

594

1726,6 1821,6 6906,4 7286,4

595

1726,8 1821,8 6907,2 7287,2

596

1727,0 1822,0 6908,0 7288,0

597

1727,2 1822,2 6908,8 7288,8

598

1727,4 1822,4 6909,6 7289,6

599

1727,6 1822,6 6910,4 7290,4

600

1727,8 1822,8 6911,2 7291,2

601

1728,0 1823,0 6912,0 7292,0

602

1728,2 1823,2 6912,8 7292,8

603

1728,4 1823,4 6913,6 7293,6

604

1728,6 1823,6 6914,4 7294,4

605

1728,8 1823,8 6915,2 7295,2

1729.0 1824.0 3458.0 3648.0

606

1729.2 1824.2 3458.4 3648.4

607

1729.4 1824.4 3458.8 3648.8

608

1729.6 1824.6 3459.2 3649.2

609

1729.8 1824.8 3459.6 3649.6

610

1730.0 1825.0 3460.0 3650.0

611

1730.2 1825.2 3460.4 3650.4

612

1730.4 1825.4 3460.8 3650.8

613

1730.6 1825.6 3461.2 3651.2

614

1730.8 1825.8 3461.6 3651.6

615

1731.0 1826.0 3462.0 3652.0

616

1731.2 1826.2 3462.4 3652.4

617

1731.4 1826.4 3462.8 3652.8

618

1731.6 1826.6 3463.2 3653.2

619

1731.8 1826.8 3463.6 3653.6

620

1732.0 1827.0 3464.0 3654.0

621

1732.2 1827.2 3464.4 3654.4

622

1732.4 1827.4 3464.8 3654.8

623

1732.6 1827.6 3465.2 3655.2

624

1732.8 1827.8 3465.6 3655.6

625

1733.0 1828.0 3466.0 3656.0

626

1733.2 1828.2 3466.4 3656.4

627

1733.4 1828.4 3466.8 3656.8

628

1733.6 1828.6 3467.2 3657.2

629

1733.8 1828.8 3467.6 3657.6

630

1734.0 1829.0 3468.0 3658.0

631

1734.2 1829.2 3468.4 3658.4

632

1734.4 1829.4 3468.8 3658.8

633

1734.6 1829.6 3469.2 3659.2

634

1734.8 1829.8 3469.6 3659.6

635

1735.0 1830.0 3470.0 3660.0

636

1735.2 1830.2 3470.4 3660.4

637

1735.4 1830.4 3470.8 3660.8

638

1735.6 1830.6 3471.2 3661.2

639

1735.8 1830.8 3471.6 3661.6

640

1736.0 1831.0 3472.0 3662.0

641

1736.2 1831.2 3472.4 3662.4

642

1736.4 1831.4 3472.8 3662.8

643

1736.6 1831.6 3473.2 3663.2

644

1736.8 1831.8 3473.6 3663.6

645

1737.0 1832.0 3474.0 3664.0

646

1737.2 1832.2 3474.4 3664.4

647

1737.4 1832.4 3474.8 3664.8

648

1737.6 1832.6 3475.2 3665.2

649

1737.8 1832.8 3475.6 3665.6

650

1738.0 1833.0 3476.0 3666.0

651

1738.2 1833.2 3476.4 3666.4

652

1738.4 1833.4 3476.8 3666.8

653

1738.6 1833.6 3477.2 3667.2

654

1738.8 1833.8 3477.6 3667.6

655

1739.0 1834.0 3478.0 3668.0

656

1739.2 1834.2 3478.4 3668.4

657

1739.4 1834.4 3478.8 3668.8

658

1739.6 1834.6 3479.2 3669.2

659

1739.8 1834.8 3479.6 3669.6

660

1740.0 1835.0 3480.0 3670.0

661

1740.2 1835.2 3480.4 3670.4

662

1740.4 1835.4 3480.8 3670.8

663

1740.6 1835.6 3481.2 3671.2

664

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763

1760,4 1855,4 3520,8 3710,8

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1761,6 1856,6 3523,2 3713,2

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1762,0 1857,0 3524,0 3714,0

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1762,6 1857,6 3525,2 3715,2

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1763,0 1858,0 3526,0 3716,0

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1763,4 1858,4 3526,8 3716,8

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1763,6 1858,6 3527,2 3717,2

780

1763,8 1858,8 3527,6 3717,6

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1764,0 1859,0 3528,0 3718,0

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1764,4 1859,4 3528,8 3718,8

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1764,8 1859,8 3529,6 3719,6

786

1765,0 1860,0 3530,0 3720,0

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1765,8 1860,8 3531,6 3721,6

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1766,0 1861,0 3532,0 3722,0

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1766,4 1861,4 3532,8 3722,8

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1767.0 1862.0 3534.0 3724.0

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1767.4 1862.4 3534.8 3724.8

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1768.6 1863.6 3537.2 3727.2

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1769.0 1864.0 3538.0 3728.0

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1769.2 1864.2 3538.4 3728.4

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1769.6 1864.6 3539.2 3729.2

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1769.8 1864.8 3539.6 3729.6

810

1770.0 1865.0 3540.0 3730.0

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1770.8 1865.8 3541.6 3731.6

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835

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850

1778.0 1873.0 3556.0 3746.0

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857

1779,2 1874,2 3558,4 3748,4

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1779,4 1874,4 3558,8 3748,8

859

1779,6 1874,6 3559,2 3749,2

860

1779,8 1874,8 3559,6 3749,6

861

1780,0 1875,0 3560,0 3750,0

862

1780,2 1875,2 3560,4 3750,4

863

1780,4 1875,4 3560,8 3750,8

864

1780,6 1875,6 3561,2 3751,2

865

1780,8 1875,8 3561,6 3751,6

866

1781,0 1876,0 3562,0 3752,0

867

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868

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869

1781,6 1876,6 3563,2 3753,2

870

1781,8 1876,8 3563,6 3753,6

871

1782,0 1877,0 3564,0 3754,0

872

1782,2 1877,2 3564,4 3754,4

873

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1782,6 1877,6 3565,2 3755,2

875

1782,8 1877,8 3565,6 3755,6

876

1783,0 1878,0 3566,0 3756,0

877

1783,2 1878,2 3566,4 3756,4

878

1783,4 1878,4 3566,8 3756,8

879

1783,6 1878,6 3567,2 3757,2

880

1783,8 1878,8 3567,6 3757,6

881

1784,0 1879,0 3568,0 3758,0

882

1784,2 1879,2 3568,4 3758,4

883

1784,4 1879,4 3568,8 3758,8

884

1784,6 1879,6 3569,2 3759,2

885

1784,8 1879,8 3569,6 3759,6

Issue 2 10/2004 COMPANY CONFIDENTIAL 45

Page 46

NHL-12

Nokia Customer Care 7 - RF Description & Troubleshooting

GSM1900

CH TX RX VCO TX V CO RX CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX

512

1850,2 1930,2 3700,4 3860,4

513

1850,4 1930,4 3700,8 3860,8

514

1850,6 1930,6 3701,2 3861,2

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516

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517

1851,2 1931,2 3702,4 3862,4

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1852,8 1932,8 3705,6 3865,6

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1853,0 1933,0 3706,0 3866,0

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529

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536

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539

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540

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543

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550

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551

1858,0 1938,0 3716,0 3876,0

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556

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560

1859,8 1939,8 3719,6 3879,6

561

1860,0 1940,0 3720,0 3880,0

562

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563

1860,4 1940,4 3720,8 3880,8

564

1860,6 1940,6 3721,2 3881,2

565

1860,8 1940,8 3721,6 3881,6

566

1861,0 1941,0 3722,0 3882,0

567

1861,2 1941,2 3722,4 3882,4

568

1861,4 1941,4 3722,8 3882,8

569

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570

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1862,2 1942,2 3724,4 3884,4

573

1862,4 1942,4 3724,8 3884,8

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1862,6 1942,6 3725,2 3885,2

575

1862,8 1942,8 3725,6 3885,6

576

1863,0 1943,0 3726,0 3886,0

577

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578

1863,4 1943,4 3726,8 3886,8

579

1863,6 1943,6 3727,2 3887,2

580

1863,8 1943,8 3727,6 3887,6

581

1864,0 1944,0 3728,0 3888,0

582

1864,2 1944,2 3728,4 3888,4

583

1864,4 1944,4 3728,8 3888,8

584

1864,6 1944,6 3729,2 3889,2

585

1864,8 1944,8 3729,6 3889,6

586

1865,0 1945,0 3730,0 3890,0

587

1865,2 1945,2 3730,4 3890,4

588

1865,4 1945,4 3730,8 3890,8

589

1865,6 1945,6 3731,2 3891,2

590

1865,8 1945,8 3731,6 3891,6

591

1866,0 1946,0 3732,0 3892,0

592

1866,2 1946,2 3732,4 3892,4

593

1866,4 1946,4 3732,8 3892,8

594

1866,6 1946,6 3733,2 3893,2

595

1866,8 1946,8 3733,6 3893,6

596

1867,0 1947,0 3734,0 3894,0

597

1867,2 1947,2 3734,4 3894,4

598

1867,4 1947,4 3734,8 3894,8

599

1867,6 1947,6 3735,2 3895,2

600

1867,8 1947,8 3735,6 3895,6

601

1868,0 1948,0 3736,0 3896,0

602

1868,2 1948,2 3736,4 3896,4

603

1868,4 1948,4 3736,8 3896,8

604

1868,6 1948,6 3737,2 3897,2

605

1868,8 1948,8 3737,6 3897,6

606

1869,0 1949,0 3738,0 3898,0

607

1869,2 1949,2 3738,4 3898,4

608

1869,4 1949,4 3738,8 3898,8

609

1869,6 1949,6 3739,2 3899,2

610

1869,8 1949,8 3739,6 3899,6

611

1870,0 1950,0 3740,0 3900,0

612

1870,2 1950,2 3740,4 3900,4

613

1870,4 1950,4 3740,8 3900,8

614

1870,6 1950,6 3741,2 3901,2

615

1870,8 1950,8 3741,6 3901,6

616

1871,0 1951,0 3742,0 3902,0

617

1871,2 1951,2 3742,4 3902,4

618

1871,4 1951,4 3742,8 3902,8

619

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620

1871,8 1951,8 3743,6 3903,6

621

1872,0 1952,0 3744,0 3904,0

622

1872,2 1952,2 3744,4 3904,4

623

1872,4 1952,4 3744,8 3904,8

624

1872,6 1952,6 3745,2 3905,2

625

1872,8 1952,8 3745,6 3905,6

626

1873,0 1953,0 3746,0 3906,0

627

1873,2 1953,2 3746,4 3906,4

628

1873,4 1953,4 3746,8 3906,8

629

1873,6 1953,6 3747,2 3907,2

630

1873,8 1953,8 3747,6 3907,6

631

1874,0 1954,0 3748,0 3908,0

632

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633

1874,4 1954,4 3748,8 3908,8

634

1874,6 1954,6 3749,2 3909,2

635

1874,8 1954,8 3749,6 3909,6

636

1875,0 1955,0 3750,0 3910,0

637

1875,2 1955,2 3750,4 3910,4

638

1875,4 1955,4 3750,8 3910,8

639

1875,6 1955,6 3751,2 3911,2

640

1875,8 1955,8 3751,6 3911,6

641

1876,0 1956,0 3752,0 3912,0

642

1876,2 1956,2 3752,4 3912,4

643

1876,4 1956,4 3752,8 3912,8

644

1876,6 1956,6 3753,2 3913,2

645

1876,8 1956,8 3753,6 3913,6

646

1877,0 1957,0 3754,0 3914,0

647

1877,2 1957,2 3754,4 3914,4

648

1877,4 1957,4 3754,8 3914,8

649

1877,6 1957,6 3755,2 3915,2

650

1877,8 1957,8 3755,6 3915,6

651

1878,0 1958,0 3756,0 3916,0

652

1878,2 1958,2 3756,4 3916,4

653

1878,4 1958,4 3756,8 3916,8

654

1878,6 1958,6 3757,2 3917,2

655

1878,8 1958,8 3757,6 3917,6

656

1879,0 1959,0 3758,0 3918,0

657

1879,2 1959,2 3758,4 3918,4

658

1879,4 1959,4 3758,8 3918,8

659

1879,6 1959,6 3759,2 3919,2

660

1879,8 1959,8 3759,6 3919,6

661

1880,0 1960,0 3760,0 3920,0

662

1880,2 1960,2 3760,4 3920,4

663

1880,4 1960,4 3760,8 3920,8

664

1880,6 1960,6 3761,2 3921,2

665

1880,8 1960,8 3761,6 3921,6

666

1881,0 1961,0 3762,0 3922,0

667

1881,2 1961,2 3762,4 3922,4

668

1881,4 1961,4 3762,8 3922,8

669

1881,6 1961,6 3763,2 3923,2

670

1881,8 1961,8 3763,6 3923,6

671

1882,0 1962,0 3764,0 3924,0

672

1882,2 1962,2 3764,4 3924,4

673

1882,4 1962,4 3764,8 3924,8

674

1882,6 1962,6 3765,2 3925,2

675

1882,8 1962,8 3765,6 3925,6

676

1883,0 1963,0 3766,0 3926,0

677

1883,2 1963,2 3766,4 3926,4

678

1883,4 1963,4 3766,8 3926,8

679

1883,6 1963,6 3767,2 3927,2

680

1883,8 1963,8 3767,6 3927,6

681

1884,0 1964,0 3768,0 3928,0

682

1884,2 1964,2 3768,4 3928,4

683

1884,4 1964,4 3768,8 3928,8

684

1884,6 1964,6 3769,2 3929,2

685

1884,8 1964,8 3769,6 3929,6

686

1885,0 1965,0 3770,0 3930,0

687

1885,2 1965,2 3770,4 3930,4

688

1885,4 1965,4 3770,8 3930,8

689

1885,6 1965,6 3771,2 3931,2

690

1885,8 1965,8 3771,6 3931,6

691

1886,0 1966,0 3772,0 3932,0

692

1886,2 1966,2 3772,4 3932,4

693

1886,4 1966,4 3772,8 3932,8

694

1886,6 1966,6 3773,2 3933,2

695

1886,8 1966,8 3773,6 3933,6

696

1887,0 1967,0 3774,0 3934,0

697

1887,2 1967,2 3774,4 3934,4

698

1887,4 1967,4 3774,8 3934,8

699

1887,6 1967,6 3775,2 3935,2

700

1887,8 1967,8 3775,6 3935,6

701

1888,0 1968,0 3776,0 3936,0

702

1888,2 1968,2 3776,4 3936,4

703

1888,4 1968,4 3776,8 3936,8

704

1888,6 1968,6 3777,2 3937,2

705

1888,8 1968,8 3777,6 3937,6

706

1889,0 1969,0 3778,0 3938,0

707

1889,2 1969,2 3778,4 3938,4

708

1889,4 1969,4 3778,8 3938,8

709

1889,6 1969,6 3779,2 3939,2

710

1889,8 1969,8 3779,6 3939,6

711

1890,0 1970,0 3780,0 3940,0

712

1890,2 1970,2 3780,4 3940,4

713

1890,4 1970,4 3780,8 3940,8

714

1890,6 1970,6 3781,2 3941,2

715

1890,8 1970,8 3781,6 3941,6

716

1891,0 1971,0 3782,0 3942,0

717

1891,2 1971,2 3782,4 3942,4

718

1891,4 1971,4 3782,8 3942,8

719

1891,6 1971,6 3783,2 3943,2

720

1891,8 1971,8 3783,6 3943,6

721

1892,0 1972,0 3784,0 3944,0

722

1892,2 1972,2 3784,4 3944,4

723

1892,4 1972,4 3784,8 3944,8

724

1892,6 1972,6 3785,2 3945,2

725

1892,8 1972,8 3785,6 3945,6

726

1893,0 1973,0 3786,0 3946,0

727

1893,2 1973,2 3786,4 3946,4

728

1893,4 1973,4 3786,8 3946,8

729

1893,6 1973,6 3787,2 3947,2

730

1893,8 1973,8 3787,6 3947,6

731

1894,0 1974,0 3788,0 3948,0

732

1894,2 1974,2 3788,4 3948,4

733

1894,4 1974,4 3788,8 3948,8

734

1894,6 1974,6 3789,2 3949,2

735

1894,8 1974,8 3789,6 3949,6

736

1895,0 1975,0 3790,0 3950,0

737

1895,2 1975,2 3790,4 3950,4

738

1895,4 1975,4 3790,8 3950,8

739

1895,6 1975,6 3791,2 3951,2

740

1895,8 1975,8 3791,6 3951,6

741

1896,0 1976,0 3792,0 3952,0

742

1896,2 1976,2 3792,4 3952,4

743

1896,4 1976,4 3792,8 3952,8

744

1896,6 1976,6 3793,2 3953,2

745

1896,8 1976,8 3793,6 3953,6

746

1897,0 1977,0 3794,0 3954,0

747

1897,2 1977,2 3794,4 3954,4

748

1897,4 1977,4 3794,8 3954,8

749

1897,6 1977,6 3795,2 3955,2

750

1897,8 1977,8 3795,6 3955,6

751

1898,0 1978,0 3796,0 3956,0

752

1898,2 1978,2 3796,4 3956,4

753

1898,4 1978,4 3796,8 3956,8

754

1898,6 1978,6 3797,2 3957,2

755

1898,8 1978,8 3797,6 3957,6

756

1899,0 1979,0 3798,0 3958,0

757

1899,2 1979,2 3798,4 3958,4

758

1899,4 1979,4 3798,8 3958,8

759

1899,6 1979,6 3799,2 3959,2

760

1899,8 1979,8 3799,6 3959,6

761

1900,0 1980,0 3800,0 3960,0

762

1900,2 1980,2 3800,4 3960,4

763

1900,4 1980,4 3800,8 3960,8

764

1900,6 1980,6 3801,2 3961,2

765

1900,8 1980,8 3801,6 3961,6

766

1901,0 1981,0 3802,0 3962,0

767

1901,2 1981,2 3802,4 3962,4

768

1901,4 1981,4 3802,8 3962,8

769

1901,6 1981,6 3803,2 3963,2

770

1901,8 1981,8 3803,6 3963,6

771

1902,0 1982,0 3804,0 3964,0

772

1902,2 1982,2 3804,4 3964,4

773

1902,4 1982,4 3804,8 3964,8

774

1902,6 1982,6 3805,2 3965,2

775

1902,8 1982,8 3805,6 3965,6

776

1903,0 1983,0 3806,0 3966,0

777

1903,2 1983,2 3806,4 3966,4

778

1903,4 1983,4 3806,8 3966,8

779

1903,6 1983,6 3807,2 3967,2

780

1903,8 1983,8 3807,6 3967,6

781

1904,0 1984,0 3808,0 3968,0

782

1904,2 1984,2 3808,4 3968,4

783

1904,4 1984,4 3808,8 3968,8

784

1904,6 1984,6 3809,2 3969,2

785

1904,8 1984,8 3809,6 3969,6

786

1905,0 1985,0 3810,0 3970,0

787

1905,2 1985,2 3810,4 3970,4

788

1905,4 1985,4 3810,8 3970,8

789

1905,6 1985,6 3811,2 3971,2

790

1905,8 1985,8 3811,6 3971,6

791

1906,0 1986,0 3812,0 3972,0

792

1906,2 1986,2 3812,4 3972,4

793

1906,4 1986,4 3812,8 3972,8

794

1906,6 1986,6 3813,2 3973,2

795

1906,8 1986,8 3813,6 3973,6

796

1907,0 1987,0 3814,0 3974,0

797

1907,2 1987,2 3814,4 3974,4

798

1907,4 1987,4 3814,8 3974,8

799

1907,6 1987,6 3815,2 3975,2

800

1907,8 1987,8 3815,6 3975,6

801

1908,0 1988,0 3816,0 3976,0

802

1908,2 1988,2 3816,4 3976,4

803

1908,4 1988,4 3816,8 3976,8

804

1908,6 1988,6 3817,2 3977,2

805

1908,8 1988,8 3817,6 3977,6

806

1909,0 1989,0 3818,0 3978,0

807

1909,2 1989,2 3818,4 3978,4

808

1909,4 1989,4 3818,8 3978,8

809

1909,6 1989,6 3819,2 3979,2

810

1909,8 1989,8 3819,6 3979,6

46 COMPANY CONFIDENTIAL Issue 2 10/2004

Nokia 6620 Service Manual 07 nhl12 RF

Specifications and Main Features

Frequently Asked Questions

User Manual

1. RF Description and Troubleshooting

■ RF key component placement

■ RF measurement points

Test points

2. RF Implementation in NHL-12

■ RF frequency plan

■ RF power supply configuration

3. Introduction to RF troubleshooting

4. Receiver Description and Troubleshooting

■ Receiver

■ Rx front-end

■ General instructions for Rx troubleshooting

■ T roubleshooting charts for receiver

Troubleshooting diagram for GSM850 receiver

Troubleshooting diagram for GSM1900 receiver

5. Transmitter Description and Troubleshooting

■ T ransmitter characteristics

■ Power amplifier

■ RF ASIC Helgo

■ AFC function

■ General instructions for Tx troubleshooting

Transmitter troubleshooting diagram

Pictures of transmitter signals

6. Additional Information on EDGE Troubleshooting

Pictures of EDGE transmitter signals

7. Synthesizer Description and Troubleshooting

■ Frequency synthesizers

■ General instructions for synthesizer troubleshooting

Troubleshooting chart for PLL synthesizer

■ Frequency lists