Nokia 2280 Service Manual 11 rh17rf

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CCS Technical Documentation

RH-17 Series Transceivers

Troubleshooting — RF

Issue 1 04/2003 Confidential Nokia Corporation

RH-17

Troubleshooting — RF CCS Technical Documentation

Page 2 Nokia Corporation Confidential Issue 1 04/2003

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CCS Technical Documentation Troubleshooting — RF

Contents

Page No

RF Troubleshooting ....................................................................................................... 5

Test Steps .....................................................................................................................5

Troubleshooting Summary ..........................................................................................9

Tuning Description ....................................................................................................13

Test 1 TS Initial Current.......................................................................................... 13

Test 2 BB Flash Phone............................................................................................ 14

Test 5 ST DBUS...................................................................................................... 15

Test 6 ST CBUS...................................................................................................... 15

Test 7 ST Aux DA................................................................................................... 16

Test 8 ST EAR Data................................................................................................ 16

Test 9 ST SleeepX................................................................................................... 17

Test 10 ST TX / DP................................................................................................. 17

Test 11 ST TX Q DP............................................................................................... 18

Test 12 ST MIF Loopback...................................................................................... 18

Test 13 ST Sleep Clock........................................................................................... 19

Test 14 ST Batman VHFPLL.................................................................................. 19

Test 15 ST Robin VHF PLL CELL ........................................................................ 20

Test 16 ST TX Detector CELL ............................................................................... 20

Test 17 SN CELL PA Temp ................................................................................... 21

Test 18 SN CELL RX BB Filter ............................................................................. 22

Test 19 and 20 SN Cell RX DC Offset I (or Q)...................................................... 22

Test 22 SN AMPS RX BB Filter ............................................................................ 22

Test 23 and 24 SN AMPS RX DC Offset I (or Q).................................................. 23

Test 25 - 27 BB Cal ADC Gain............................................................................... 23

Test 28 BB Cal BSI Gain........................................................................................ 24

Test 29 BB Cal VBAT Gain ................................................................................... 24

Test 30 BB Cal VBAT Offset ................................................................................. 24

Test 31 BB Cal VCHAR Gain ................................................................................ 25

Test 32 BB Cal VCHAR Offset.............................................................................. 25

Test 33 BB Cal ICHAR Gain.................................................................................. 26

Test 34 BB Cal ICHAR Offset................................................................................ 26

Test 35 BB Cal BTEMP Gain................................................................................. 27

Test 36 Test TX Start up Amplitude Limits [5,20]................................................. 27

Test 38 Test TX Start up Current Limits [300,600]................................................ 27

Test 39 TN VCTCXO Frequency Limits [-150, 150]............................................. 28

Test 40 - 44 TN TX IF AGC Cell Po (0) [or (1), (2), (3), (4), (5), (6)] .................. 29

Test 45 TN TX IF 11 dBm Set CELL Po................................................................ 30

Test 46 - 51 TN PA AGC Cal Cell Po (0) [or (1), (2), (3), (4), or (5)]................... 31

Test 52 - 56 TN TX RF AGC Cell Po (0) [or (1), (2), (3), or (4)].......................... 32

Test 61 - 67 TN TX Gain Comp Cell Po MD (or LO, LM, ML, MH, HM, or HI) 33

Test 68 TN G_Offset Cell MD................................................................................ 33

Test 69 - 75 TN TX Limiting PO IS95 Cell, Low channel (or LowMid, MidLow,

Mid, MidHigh, HighMid or High channel) ................................................... 34

Test 76 - 82 TN TX Limiting Po IS2K Cell: Low channel (or LowMid, MidLow,

Mid, MidHigh, HighMid or High channel) ................................................... 35

Test 100 -101 TS ACPR Cell - High(Low) Offset.................................................. 36

Tests 103 - 109 TN AMPS PL2 Po Low (LowMid, MidLow, Mid, MidHigh,

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HighMid, or High).......................................................................................... 36

Tests 111 - 115 TN AMPS PL3 (or 4, 5, 6, or 7) Po............................................... 37

Test 118 TN TX DC Offset Carrier Suppression.................................................... 37

Test 119 TN TX DC Offset Reference Power ........................................................ 38

Test 121 - 123 TN RX IF AGC RXdBCtr (0) [or (1) or (2)].................................. 39

Test 178 - 179 TN LNA AMPS LowGain (or HighGain) ...................................... 40

Test 126 - 139 TN LNA CELL LowGain (or HighGain) LO (or LM, ML, MD,

MH, HM, HI).................................................................................................. 40

Final UI test: Rho.................................................................................................... 41

Final UI test: Frame Error Rate (FER).................................................................... 41

Final UI test: SINAD............................................................................................... 41

Probing/Troubleshooting Tables ...............................................................................42

Transmitter Probing................................................................................................. 42

VCO Probing........................................................................................................... 46

Receiver Probing..................................................................................................... 48

RF Power Supplies.................................................................................................. 51

APPENDIX A: Phoenix Instructions .........................................................................51

To turn off Cell CDMA Transmitter .........................................................................53

To turn on the AMPS transmitter ..............................................................................54

To turn on the receiver only, in any mode .............................................................. 55

To verify a single, manual tuning............................................................................ 56

To adjust PDM values of AGCs and AFC.............................................................. 56

To read tuning values from the phone..................................................................... 57

To read RSSI and AGC PDM values from the phone............................................. 57

To load a PRL into the phone.................................................................................. 58

To change between Normal and Local modes ........................................................ 58

To add a baseband to the AMPS transmitter........................................................... 59

APPENDIX B: Definitions ........................................................................................60

Radio Portion of Phone Front Panel .........................................................................62

Robin View ................................................................................................................64

Alfred View ...............................................................................................................65

Back Panel test points ................................................................................................67

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CCS Technical Documentation Troubleshooting — RF

RF Troubleshooting

Test Steps

Step Step Name: Low Limits: High Limits: Unit:

1 TS Initial Current 5 100 mA

2 BB Flash Phone Pass/Fail-

Test

MS Off state Current 10 100 uA

3 MS Local Mode Current 30 70 mA

4 Write Phone Information Pass/Fail-

Test

5 ST DBUS 0 10

6ST CBUS 0 10

ST MBUS TX/RX 0 0

7 ST Aux DA 0 10

8 ST Ear Data 010

9 ST Sleep X 0 10

10 ST TX I DP 0 10

11 ST TX Q DP 0 10

12 ST MFI Loopback 0 10

13 ST Sleep Clock 0 10

14 ST Batman VHF PLL 0 10

15 ST Robin VHF PLL CELL 0 10

16 ST TX Detector CELL 0 10

ST Mode CDMA CELL RX 1 1

17 SN CELL PA Temp 200 400 ADC

18 SN CELL RX BB Filter 1 30

19 SN CELL RX DC Offset I 0 1023

20 SN CELL RX DC Offset Q 0 1023

21 PM AMPS RX Pass/Fail-

Test

22 SN AMPS RX BB Filter 1 14

23 SN AMPS RX DC Offset I 0 1023

24 SN AMPS RX DC Offset Q 0 1023

25 BB Cal ADC Gain 2.63 2.83

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26 BB Cal ADC Offset -50 50

27 BB Cal ADC Vref 2.75 2.85

28 BB Cal BSI Gain 900 1100

29 BB Cal VBAT Gain 1.03 1.07

30 BB Cal VBAT Offset 2.4 2.6

31 BB Cal VCHAR Gain 5.7 6.3

32 BB Cal VCHAR Offset -0.2 0.2

33 BB Cal ICHAR Gain 400 450

34 BB Cal ICHAR Offset -50 50

35 BB Cal BTEMP Gain 2 2.3

36 TS TX Start-up Amplitude 5 20 dBm

37 TS TX Start-up Freq Delta -2500 2500

38 TS TX Start-up Current 300 600 mA

39 TN VCTCXO Frequency -150 150 Hz

40 TN TX IF AGC CELL Po(0) -30.5 -13.5 dBm

41 TN TX IF AGC CELL Po(1) -8 6 dBm

42 TN TX IF AGC CELL Po(2) 6.5 20.5 dBm

43 TN TX IF AGC CELL Po(3) 6.5 20.5 dBm

44 TN TX IF AGC CELL Po(4) 25 39 dBm

TN TX IF AGC CELL Po(5) 29 42 dBm

TN TX IF AGC CELL Po(6) 37 49 dBm

45 TN TX IF 11dBm Set CELL Po 10.75 11 .2 5 dBm

46 TN TX PA AGC CELL Po(0) -1 6.5 dBm

47 TN TX PA AGC CELL Po(1) 1 8.5 dBm

48 TN TX PA AGC CELL Po(2) 2 10.5 dBm

49 TN TX PA AGC CELL Po(3) 4 11 . 5 dBm

50 TN TX PA AGC CELL Po(4) 7 13 dBm

51 TN TX PA AGC CELL Po(5) 10.5 11 .5 dBm

52 TN TX RF AGC CELL Po(0) -41 -21 dBm

53 TN TX RF AGC CELL Po(1) -23.5 -7 dBm

54 TN TX RF AGC CELL Po(2) -10.5 3.5 dBm

55 TN TX RF AGC CELL Po(3) -3.5 9.5 dBm

56 TN TX RF AGC CELL Po(4) 0.5 11.5 dBm

57 TN GnSwchPnts Init RF GD AMPS 25 44.99

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58 TN GnSwchPnts RF GD AMPS 0 100

59 TN GnSwchPnts Init RF GD CELL 25 44.99

60 TN GnSwchPnts RF GD CELL 0 100

61 TN TX Gain Comp CELL Po MD -8.25 -7.75 dBm

62 TN TX Gain Comp CELL Po LO -11.5 -4.5 dBm

63 TN TX Gain Comp CELL Po LM -11.0 -4.0 dBm

64 TN TX Gain Comp CELL Po ML -11.0 -4.0 dBm

65 TN TX Gain Comp CELL Po MH -10 -3 dBm

66 TN TX Gain Comp CELL Po HM -10 -2 dBm

67 TN TX Gain Comp CELL Po HI -13.5 -5 dBm

68 TN G_Offset_CELL_MD 2600 8000

69 TN TX LIM Po IS95 CELL LO 23.3 23.5 dBm

70 TN TX LIM Po IS95 CELL LM 23.6 23.8 dBm

71 TN TX LIM Po IS95 CELL ML 24.0 24.2 dBm

72 TN TX LIM Po IS95 CELL MD 24.4 24.6 dBm

73 TN TX LIM Po IS95 CELL MH 24.3 24.5 dBm

74 TN TX LIM Po IS95 CELL HM 24.2 24.4 dBm

75 TN TX LIM Po IS95 CELL HI 24.1 24.3 dBm

76 TN TX LIM Po IS2K CELL LO 23.3 23.5 dBm

77 TN TX LIM Po IS2K CELL LM 23.6 23.8 dBm

78 TN TX LIM Po IS2K CELL ML 24 24.2 dBm

79 TN TX LIM Po IS2K CELL MD 24.4 24.6 dBm

80 TN TX LIM Po IS2K CELL MH 24.3 24.5 dBm

81 TN TX LIM Po IS2K CELL HM 24.2 24.4 dBm

82 TN TX LIM Po IS2K CELL HI 24.1 24.3 dBm

83 TN TX LIM Loops CELL LO 0 10

84 TN TX LIM Loops CELL LM 0 10

85 TN TX LIM Loops CELL ML 0 10

86 TN TX LIM Loops CELL MD 0 10

87 TN TX LIM Loops CELL MH 0 10

88 TN TX LIM Loops CELL HM 0 10

89 TN TX LIM Loops CELL HI 0 10

90 TN TX LIM Loops CELL IS2K LO 0 10

91 TN TX LIM Loops CELL IS2K LM 0 10

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92 TN TX LIM Loops CELL IS2K ML 0 10

93 TN TX LIM Loops CELL IS2K MD 0 10

94 TN TX LIM Loops CELL IS2K MH 0 10

95 TN TX LIM Loops CELL IS2K HM 0 10

96 TN TX LIM Loops CELL IS2K HI 0 10

97 TS TX LIM MeasCount CELL 0 500

98 TS TX LIM TXdBCtr Delta CELL -32767 32767

99 TS TX LIM IS95 ADC CELL MD 550 850

100 TS ACPR CELL High Offset 44 75 dB

101 TS ACPR CELL Low Offset 44 75 dB

102 TS TX LIM Current CELL 600 1000 mA

103 TN AMPS PL2 Po LO 23.3 23.4 dBm

104 TN AMPS PL2 Po LM 23.6 23.8 dBm

105 TN AMPS PL2 Po ML 24.0 24.2 dBm

106 TN AMPS PL2 Po MD 24.4 24.6 dBm

107 TN AMPS PL2 Po MH 24.3 24.5 dBm

108 TN AMPS PL2 Po HM 24.2 24.4 dBm

109 TN AMPS PL2 Po HI 24.1 24.3 dBm

110 TN AMPS PL2 MeasCount 0 500

111 TN AMPS PL3 Po 23.3 24.1 dBm

112 TN AMPS PL4 Po 19.1 20.9 dBm

11 3 TN AMPS PL5 Po 15.1 16.9 dBm

114 TN AMPS PL6 Po 11.1 12.9 dBm

11 5 TN AMPS PL7 Po 7.3 8.7 dBm

116 TN AMPS PL8 Po ADC Data 4.5 7.5

11 7 TN AMPS Low PL MeasCount 0 500

118 TN TX DC Offset CarrierSup 35 120 dB

11 9 TN TX DC Offset Ref Po -30 30 dBm

120 TN TX DC Offset MeasCount 0 500

121 TN RX IF AGC RXdBCtr(0) 23584 30848

122 TN RX IF AGC RXdBCtr(1) 14000 18000

123 TN RX IF AGC RXdBCtr(2) 5900 8900

124 TN LNA AMPS LowGain 298 3652

125 TN LNA AMPS HighGain 4359 7713

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126 TN LNA CELL LO LowGain -601 4289

127 TN LNA CELL LM LowGain -601 4289

128 TN LNA CELL ML LowGain -601 4289

129 TN LNA CELL MD LowGain 423 3777

130 TN LNA CELL MH LowGain -601 4289

131 TN LNA CELL HM LowGain -601 4289

132 TN LNA CELL HI LowGain -601 4289

133 TN LNA CELL LO HighGain 3475 8365

134 TN LNA CELL LM HighGain 3475 8365

135 TN LNA CELL ML HighGain 3475 8365

136 TN LNA CELL MD HighGain 4499 7853

137 TN LNA CELL MH HighGain 3475 8365

138 TN LNA CELL HM HighGain 3475 8365

139 TN LNA CELL HI HighGain 3475 8365

140 NVD Write RF Params Pass/Fail-

Test

141 NVD Write Non RF Params Pass/Fail-

Test

Troubleshooting Summary

If TX power is low, turn on transmitter in local mode using Phoenix. Check:

1 Current (0.7 - 1 A for max power, mode and channel dependent),

2 Perform visual inspection of PWB under microscope to check proper placement,

rotation, and soldering of components.

3 Look for presence of TX signal on spectrum analyzer at the correct frequency. If

signal is not on frequency, check in 100 MHz span. If signal is present but off frequency, check synthesizer. If signal is not present, or present but low in amplitude, use probing Tables 1 through 7 to determine where in the chain the fault occurs, with AGC PDMs set for known transmit power as listed in Table 1.

4 Check that AGC PDMs are set for desired TX power according to Table 1 and

ensure AGC voltages are correct.

5 According to Tables 2 and 3 (cell/AMPs), check the LOs for proper frequency and

amplitude.

6 Ensure power supplies to transmitter have correct voltage, as per Table 13.

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If Receiver is not working properly, turn on receiver in local mode using Phoenix and check:

1 Turn on receiver with Phoenix, inject a signal into the receiver.

2 Check the RSSI level and AGC PDM according to Table 8.

3 Perform a visual inspection of the PWB under a microscope to check proper

placement, rotation, and soldering of components.

4 Use probing Tables 8 through 12 to measure signal levels of various points in the

chain and determine where in the chain the fault lies.

5 According to Tables 9, 10, and 12 check the LOs for proper frequency and ampli-

tude.

6 Ensure power supplies to receiver have correct voltage as per Table 13.

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Figure 1: RH-17 PWB bottom (general placement)

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Figure 2: RH-17 PWB top (general placement)

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CCS Technical Documentation Troubleshooting — RF

Tuning Description

Test 1 TS Initial Current

Description

Check initial current consumption at start-up to make sure phone is consuming correct amount of current.

Explanation of Result

Phones current consumption is measured and should be between 5mA and 100 mA.

Manual Verification

Check using Power Supply and Multimeter, example follows. Power Off phone and follow setup below to verify if phone’s current consumption is correct.

1 Positive Banana connector on Test Fixture to Power Supply +

2 Ground Banana connector on Test Fixture to | on Multimeter

3 Jumper cable between Power Supply (-) and Multimeter (input low)

4 Set Multimeter to measure current (DC|)

5 Multimeter should have an initial reading, this is the current being drawn by the

6 Place phone in Test Fixture

7 Press Power key to turn phone on

8 Observe current draw at Multimeter. It should be between 5.0mA and 100.0mA.

Troubleshooting

If phone drains all available current:

Check VBAT and do a visual inspection of all baseband ICs including orientation. VBAT supplies the D200 (UEM), N603 (Tomcat), N801 (PA), X101, N100, B302, M300, N300, and X470.

Text Fixture. Null out the Multimeter to Zero the reading.

If the phone has initial current consumption at start-up then powers down:

If, after a few seconds, all circuits power down, it is normally caused because the watchdog signal between UEM (200) and UPP (D400) has expired. Watchdog is used by the phone for fault detection.

• Check voltage regulators for correct voltage. If voltage is low or not present, check for shorts.

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VCORE - 1.50V @ C403

VIO - 1.8V @ C242

VANA - 2.8V @ C264

VFLASH1 - 2.8V @ C239

VR3 - 2.8V @ C256

• Check logic signals and clocks:

Power_OnX @ R301

UEMint - 2.80 Vdc @ test point J405

PURX - 2.80 Vdc @ test point J402

SleepX - 1.80 Vdc @ test point J403

Clk 19M2_UPP-19.2MHz @ C524

SleepClk - 32.768kHz @ J404

Test 2 BB Flash Phone

Description

The purpose of this test is to verify that the phone software was downloaded at panel flash. If download was not successful, phone will try and flash for a second time.

Explanation of Result

Pass or Fail

Manual Verification

Manual flashing using Prommer Box and Phoenix at bench.

1 Make sure correct connection is configured at FPS-8. First, set up FPS-8 with

serial (AXS-4) and parallel cables. Next, power up box with 6-volt supply and place communication cable XCS-4 between FPS-8 and Flash Adapter (FLA-44), FLAL Fixture MJS-82, or JBV-1 (with adapter MJF-28).

2 Make sure that Phoenix’s connection is correct. In Phoenix, select File>Manage

Connections>Add>Mode to manual>Media to FBUS>Port NUM 1 or 2 (this is dependent on Local PC com port selection)>Bit Rate to 115200>COMBOXDEF_MEDIA to FBUS; then Apply.

3 Check that Prommer Box FPS-8 is correctly configured. In Phoenix, go to Flash-

ing>FPS-8/FPS-8C Maintenance. Make sure current version is A2.10.

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4 Next, try and flash phone using correct SW version. In Phoenix: Flashing>FPS-8

Flash>Press Flash. Next select OK from pop-up screen. Under next screen, Flash File Selection, choose Image File “set”. In correct directory where you store your flash files (usually programs, then Nokia, Phoenix, Flash) select correct Flash SW xxxxxxx.nep (if not sure what correct SW to use, file name should match SW in a known good phone. To check this, take good phone in Phoenix and go Product>Phone Information and check MCU SW Version). Once correct SW file is found, select OK. You will be prompted to save settings, select “yes”. Flashing should begin at this point. For first time, set up of prommer this could take a few minutes due to PC loading file to prommer RAM first. After first use, prommer stores this in internal RAM and should proceed faster with subsequent phones downloading of flash software. If phone passes, then more than likely a false fail. If phone fails, read prommer failure code and use Code Sheet in TS.

Troubleshooting

Make sure phone has PSN and SW version is correct by checking Phone Information. Reference the following guides to TS flash problem: Haukka BB Operation doc, Prommer Codes, and Flash Block Diagram.

Test 5 ST DBUS

Description

The purpose of this test is to verify that the connections between the DSP inside the UPP and the UEM, via the DBUS, are intact. The DSP will write an arbitrary value to DBUS General Control register in UEM; then DSP will read DBUS from General Control register in UEM and valid repeatability.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode. Next, BB Self Tests - select ST_UEM_DBUS_TEST, then Run.

Troubleshooting

Connections tested at UPP: DBUSDA (pad L3) check test point J414, DBUSCLK (pad K3) check test point J413, DBUSEN1X (pad J3) check test point J415. At UEM: DBUSDA (pad A11), DBUSCLK (pad D10), and DBUSENX (pad B10). Bus interface name is RFCONVCTRL(2:0).

Test 6 ST CBUS

Description

The purpose of this test is to verify that the connections between the MCU inside the UPP and the UEM, via the CBUS, are intact. The MCU will read CBusADCR register and verify UEM chip version is valid.

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Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode; next, BB Self Tests - select ST_UEM_CBUS_IF_TEST, then Run.

Troubleshooting

Connections tested at UPP: CBUSDA (pad G2) check test point J407, CBUSCLK (padG1) check test point J406, CBUSENX (pad F3) check test point J408. At UEM: CBUSDA (pad B7), CBUSCLK (pad A8), and CBUSENX (pad C8). Bus interface name is AUDUEMCTRL (3:0).

Test 7 ST Aux DA

Description

The purpose of this test is to verify the AUXD and UEMINT data connections between the UPP and the UEM are intact. MCU will set the UEM looptest mode by programming the Loop Test bit in the CBUS General Control 2 register. Next, DSP will write a word to AuxD register, thus causing a rising edge on the AuxD line. MCU will verify that UEMInt occurs.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode; next BB Self Tests - select ST_AUX_DA_LOOP_TEST; then Run.

Troubleshooting

Connections tested: 1) UPP: AUXDA (pad L2) via bus interface RFCONVDA(5) to UEM: AUXDA (pad D11). 2) UPP: UEMINT (pad J2) check test point J405, via bus interface AUDUEMCTRL(0) to UEM; UEMINT (pad A10).

Test 8 ST EAR Data

Description

The purpose of this test is to verify the EAR and MIC data connections between the UPP and the UEM are intact. MCU will set the UEM looptest mode by programming the Loop Test bit in the CBUS General Control 2 register. Next, DSP will write an arbitrary pattern to CodexRx register and then read the data from the Codec Tx register.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode. Next, BB Self Tests - select

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ST_EAR_DATA_LOOP_TEST, then Run.

Troubleshooting

Connections tested at UPP: EARDATA (pad B6), MICDATA (pad A6), and at UEM: EARDATA (pad E2), MICDATA (pad F2). Bus interface name is AUDIODATA (1:0).

Test 9 ST SleeepX

Description

The purpose of this test is to verify the Sleep connection between the UPP and the UEM is intact. This function tests the connection of pin_out and pin_in signals between UPP and UEM. The result depends on functionality of UEM loopback modes and condition of signal lines. The MCU will set UEM in looptest mode by programming via CBUS. MCU will then read sleep clock counter registers and store value. MCU then toggles SleepX signal High then Low and reads counters again. Expected value is 1 higher than previous count.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode. Next, BB Self Tests - select ST_SLEEP_X_LOOP_TEST, then Run.

Troubleshooting

Connections tested are CBUS see Test 6, Sleepclock (J404) at UEM (D9) to UPP (H3). SleepX (J403) at UEM (pad B11) from UPP (pad L1). Bus interface between UPP and UEM is PUSL (2:0). Check also at UEM the OSCCAP (C234).

Test 10 ST TX / DP

Description

To verify that the Tx/Rx | lines between UPP and UEM are intact. MCU will set UEM into Looptest mode by programming the Loop Test bit via CBUS General Control 2 register. DSP will set Parallel-series bypass switches for both Rx and Tx in the MFI block of the UPP by programming the TxBypass and RxBypass bits in the MFI Control Register. DSP will write arbitrary value to TxRam of MFI, then DSP will read this data from RxRAM of the MFI.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode. Next, BB Self Tests - select ST_TX_IDP_LOOP_TEST, then Run.

Troubleshooting

Connections tested are CBUS see Test 6, Connections tested at UPP: RXID (pad L4), TXID

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(pad M2) and at UEM: RXID (pad C11), TXID (pad A12). Bus interface name is RFCONVDA (5:0).

Test 11 ST TX Q DP

Description

To verify that the Tx/Rx Q lines between UPP and UEM are intact.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode. Next, BB Self Tests - select ST_TX_IQ_DP_LOOP_TEST, then Run.

Troubleshooting

Connections tested are CBUS see Test 7. Connections tested at UPP: RXQD (pad N4), TXQD (pad N2), and at UEM: RXQD (pad A14), TXQD (pad B12). Bus interface name is RFCONVDA (5:0).

Test 12 ST MIF Loopback

Description

The purpose of this test is to verify that the Tx/Rx IQ paths inside the MFI block of the UPP are intact. DSP will swt IQSTWrap in MFI Control Register. Next, DSP will set six of the TX and Rx buffers to be the same. Sets Serial-Parallel bypass switches On. DSP will write a varying pattern to both halves of the Tx buffer, then read Rx buffer and verify data written is data received.

NOTE: This test does not test the connectivity between any two points in the HW (nodes inside of a chip do not qualify for connectivity). This test ascertains the cause of the UEM IQ Loopback Selftest failure, and determines whether the UPP or the UEM or the connection between them caused the UEM IQ to Loopback Selftest fail.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local mode: Next, BB Self Tests - select ST_MFI_IQ_LOOPBACK_TEST, then Run.

Troubleshooting

Connections tested are UPP only. If this test passes and Test 11 fails, then the problem is in UEM. If both Test 11 and Test 12 fail, the problem is in UPP.

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Test 13 ST Sleep Clock

Description

The purpose of this test is to verify connections from 32kHz oscillator to the UEM, then from UEM to SleepClk to the UPP. Also tested is AFCOUT of the UEM to the VCTCXO, and from VCTCXO to RF clock to UPP are intact. UPP sets AFCR for UEM to set AFCOUT to mid range. Next, DSP will measure how many 19.2MHz clock cycles are present in 1024 cycles of the 32kHz clock. Next, AFCOUT is set to maximum value by writing to AFCR in UEM. Again measurement is taken as previously mentioned. The two measurements are subtracted. Then, AFCOUT is set to minimum value and again measured and compared to mid-value results. Expected values are validated by pass or fail.

Explanation of Result

Pass or Fail

Manual Verification

In Phoenix, put phone in Local Mode. Next, BB Self Tests - select ST_APOLL_SLEEP_CLK_TEST, then Run.

Troubleshooting

Connections tested are DBUS (see Test 5), VCTCXO circuit including AFC control voltage from UEM, Sleepclock at UEM, and also RFCLK to UPP via V500 and C524. Check also at UEM the OSCCAP (C234).

Test 14 ST Batman VHFPLL

Description

This is one of the phone’s self tests which gives either a pass or fail result only. The VHF PLL is inside the Batman IC. The phone checks the VHFPLL’s lock detect bit. If this bit indicates that the PLL is unlocked, the test will fail.

Explanation of Result

Pass or Fail

Manual Verification

Turn on the Cell receiver to any channel and probe at C702 (probing point TP49 in Table 10 using an RF probe connected to a spectrum analyzer tuned to 256.2MHz. If the PLL is locked, it will be stable in frequency. If it is unlocked, you may have to use a wide span, so see if it may be far off frequency.

Troubleshooting

First check that V701 has the proper orientation, then check C701, C714, R703, R702, C715, R704, C716, L701, and C702. Also, check power supplies to Batman, particularly check for 2.7v on VR5 at C710, and on VR7 at C708, and check for 1.8v on VIO. Next check if CLK 19M2_B (C512) the reference frequency for PLL is at 19.2MHz. If no fault is found, replace N701 (Batman).

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Test 15 ST Robin VHF PLL CELL

Description

This is one of the phone’s self-tests which gives either a pass or fail result. The VHFPLL is inside the Robin IC. The phone checks the VHFPLL’s lock detect bit. If this bit indicates that the PLL is unlocked, the test will fail.

Explanation of Result

Pass or Fail

Manual Verification

Turn on the Cell CDMA transmitter to any channel and probe at C638 (probing point TP27 in Table 2) using an RF probe connected to a spectrum analyzer tuned to 345.2MHz. If th PLL is locked, it will be stable in frequency. If it is unlocked, you may have to use a wide span to see it since it may be far off frequency.

Troubleshooting

First, check that V601 and V602 have the proper orientation, then check C612, C613, R607, R605, C632, R606, C638, L611, C631, C630, C629, C637, R609, C618, and R613. Check power supplies to N601 (Robin) and ensure there is 2.7v on VR3 and VR6, and 1.8v on VIO (Table 13). Next, check if CLK 19M2_R (C513) the reference frequency for PLL is at 19.2MHz. If no problems are found, replace Robin.

Test 16 ST TX Detector CELL

Description

This is one of the phone’s self-tests which gives either a pass or fail result only. The phone transmits at several power levels and checks the ADC value of the power detector. The ADC value is measured first for a set of AGC values, then each AGC value is changed one at a time to make sure that the ADC changes as each AGC value is changed individually.

Explanation of Result

Pass or Fail

Manual Verification

Using Main Mode: turn on the Cell CDMA TX with channel set to 384, and turn on IS95 modulation using CDMA control.

Using the PDM window, set:

TX_IF_AGC to -100

TX_RF_AGC to -512

PA_AGC to +511

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Record the TX signal power from the antenna connector using a spectrum analyzer centered at 836.52Mhz. (The self-test measures the power detector reading instead, but at the present time this cannot be done with Phoenix, therefore an easy way to check functionality without removing the covers is to check transmitted power. If the covers are removed, the voltage on PWR_OUT, at probing point J603 can be measured.) Transmitted power should be greater than 24dBm. (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 24dBm (less than 1.91v on PWR_OUT.

1. TX_IF_AGC to -80 TX_RF_AGC to -512, PA_AGC to -512

2. TX_IF_AGC to +511, TX_RF_AGC to -512, PA_AGC to +511

3. TX_IF_AGC to -80 TX_RF_AGC to +511 PA_AGC to +511.

Troubleshooting

If there is a failure associated with only some of the cases above, check the AGC voltages and components of the associated PDMs as described in Table 1. For problems with the IF or RF AGC, also check Robin and supporting components. For PA AGC problems, also check the PA and supporting components. If all of the above cases fail, troubleshoot the TX chain as described in Probing/Troubleshooting Tables. If all the output powers are passing, then perhaps the test is failing because the ADC voltage is wrong (which at this point we cannot read, so we are measuring the actual output power). This can be verified by measuring the voltage on the PWROUT probing point J603, the limit is 1.64v. If the voltages are wrong, then check the power detector at R801, L801, R805, and C807, and also Robin. If the voltages are correct and it still fails, check the UEM (D200).

Test 17 SN CELL PA Temp

Description

This is one of the phone’s self-tunings, which reads the ADC voltage of a thermistor R808, and checks to make sure the phone is at room temperature. The reason for this is that we don’t want to tune a phone while it is hot or cold.

Explanation of Result

The phone reports the ADC voltage value of the thermistor, and it should be within the limits.

Manual Verification

Ensure the phone is cool by letting it cool down for several minutes, and retest, keeping

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in mind that if there is a short circuit on the board, then it will get hot very quickly. In Phoenix, go to ADC readings and verify Power Amplifier Temperature, ADC value will go down as Temperature goes up.

Troubleshooting

If the phone was recently transmitting in Cell band at full power for an extended period of time, it is probably hot for that reason. Let it cool down for a few minutes, then try again. If it still fails, there may either be a short on the board or else a problem with the PA Temp circuitry. To check PA Temp circuitry, check R808, C231, R207, and D200. If a short is suspected, check the PA (N801).

Test 18 SN CELL RX BB Filter

Description

This is one of the phone’s self-tunings, which tunes the lowpass filter in the Batman IC (N701), in cell CDMA mode.

Explanation of Result

This self-tuning returns one of the filters tuned parameters, which should be within the limits.

Manual Verification

Use Batch Tuning window in Phoenix, select RF Tunings and check value.

Troubleshooting

Check Batman (N701) and supporting components.

Test 19 and 20 SN Cell RX DC Offset I (or Q)

Description

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 limits.

Explanation of Result

The DC offset is returned for I (or Q).

Manual Verification

Use Batch Tuning window in Phoenix, select RF Tunings and check value.

Troubleshooting

In Phoenix, put phone in local mode, then CDMA RX. Check voltage at Batman (N701) at test points TP45-TP48 and supporting components at Batman IC.

Test 22 SN AMPS RX BB Filter

Description

This is one of the phone’s self-tunings, which tunes the lowpass filter in the Batman IC

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(N701) in AMPS mode.

Explanation of Result

Use Batch Tuning window in Phoenix, select RF Tunings and check value.

Manual Verification

Use RF Tuning window in Phoenix, set mode to “self tune” and choose this tuning.

Troubleshooting

Check Batman (N701) and supporting components.

Test 23 and 24 SN AMPS RX DC Offset I (or Q)

Description

This is one of the phone’s self-tunings which measures and adjusts the cell band AMPS receiver DC offsets until they are within the limits.

Explanation of Result

The DC offset is returned for I (or Q).

Manual Verification

Use Batch Tuning window in Phoenix, select RF Tunings and check value.

Troubleshooting

In Phoenix, put phone in local mode, then AMPS RX. Check voltage at Batman (N701) at test points TP45-TP48 and supporting components at Batman IC.

Test 25 - 27 BB Cal ADC Gain

Description

This calibration trains the BB ADC to two known voltage inputs. Because of the inaccuracy of an analog-to-digital converter, it must be calibrated using known values. Once values are established, phone will be able to calculate the other ADC calibrations accurately. Converter gain and offset parameters are calculated by measuring a voltage input

on BSI line of 0.7 Vdc and 2.1 Vdc. Also, some calibrations use the reference voltage V It is calculated from offset and gain: V

REF

= offset + 1023 x gain.

REF

Explanation of Result

ADC Gain, Offset and Vref values

Manual Verification

In Phoenix, set phone to local mode then EM Calibration. Press read from phone. Gain factor is 0.0001 mV/bit, Offset is measured in mV.

Troubleshooting

Check the BSI components X101, C109, C230, R206, and R203. Check that VFLASH volt-

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age is at 2.80 Vdc. Baseband components D200, D400, and D450 are soldered and aligned correctly.

NOTE: All BB calibrations must be performed whenever UEM (D200) is replaced. In other words, alignment is necessary at ATE.

Test 28 BB Cal BSI Gain

Description

This baseband calibration teaches the ADC what a 68k ohms emerges at the BSI pin.

Explanation of Result

BSI Gain ADC factor

Manual Verification

In Phoenix, set phone to local mode, then EM Calibration. Press read from phone.

Troubleshooting

BSI resistor value varies, dependent on fixture being used (e.g., JBV-1 (with adapter MJF-

28), FLA-44 or MJS-82. Check the BSI components X101, C109, C230, R206, and R203.

Check that VFLASH voltage is at 2.80Vdc. Baseband components D200, D400, and D450 are soldered and aligned correctly.

Test 29 BB Cal VBAT Gain

Description

This baseband calibration teaches the ADC what two different voltage inputs look like. Lower known voltage input is 3.1 Vdc and higher input is 4.2 Vdc. This voltage-scaler circuit is used to form the voltage into the proper range.

Explanation of Result

The gain factor is a result of scaled value and the global value determined in Test 25 and used to calculate VBAT Gain.

Manual Verification

In Phoenix, set phone to local mode, then EM Calibration. Press read from phone.

Troubleshooting

Check Battery Connector X101, baseband components D200, D400, and D450 are soldered and aligned correctly. Remember that this gain factor is determined using Test 25 as a reference. Make sure it was within limits also.

Test 30 BB Cal VBAT Offset

Description

This baseband calibration teaches the ADC what two different voltage inputs look like. Lower known voltage input is 3.1 Vdc and higher input is 4.2 Vdc. This voltage-scaler cir-

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cuit is used to form the voltage into the proper range.

Explanation of Result

The offset is a result of scaled value and global value determined in Test 26 and used to calculate VBAT Offset.

Manual Verification

In Phoenix, set phone to local mode then EM Calibration. Press read from phone.

Troubleshooting

Check Battery Connector X101, baseband components D200, D400, and D450 are soldered and aligned correctly. Remember that this gain factor is determined using Test 26 as a reference. Make sure it was within limits too.

Test 31 BB Cal VCHAR Gain

Description:

This baseband calibration teaches the ADC what two different voltage inputs look like. Lower known voltage input is 3.0 Vdc and higher input is 8.4 Vdc.

Explanation of Result:

The gain factor is a result of the two voltages and the global value determined in Test 25 and used to calculate VCHAR Gain.

Manual Verification:

In Phoenix set phone to local mode then EM Calibration. Press read from phone.

Troubleshooting:

For production the VCHAR voltage is sent to galvanic pads on the PWB. Check for solder bridge on X104, fuse F100, L100, C106 and V100. Remember that this gain factor is determined using Test 25 as a reference, make sure it was within limits also.

Test 32 BB Cal VCHAR Offset

Description

This baseband calibration teaches the ADC what two different voltage inputs look like. Lower known voltage input is 3.0 Vdc and higher input is 8.4 Vdc.

Explanation of Result:

The offset is a result of the two current limit values and the global value determined in Test 26 and used to calculate VCHAR offset.

Manual Verification:

In Phoenix set phone to local mode then EM Calibration. Press read from phone.

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Troubleshooting:

For production the VCHAR voltage is sent to galvanic pads on the PWB. Check for solder bridge on X104, fuse F100, L100, C106 and V100. Remember that this gain factor is determined using Test 26 as a reference, make sure it was within limits also.

Test 33 BB Cal ICHAR Gain

Description:

This baseband calibration teaches the ADC what two different charger current inputs look like. Voltage input is at 6.0 Vdc at two different current limits, lower being limited to 200 mA, higher current limit is set at 800 mA. Then PCI command to instruct phone to turn on charger circuitry.

Explanation of Result:

The gain factor is a result of the two current limits along with global value determined in Test 25 which is then used to calculate ICHAR Gain.

Manual Verification:

In Phoenix set phone to local mode then EM Calibration. Press read from phone.

Troubleshooting:

For production the VCHAR voltage is sent to galvanic pads on the PWB. Check current sensing resistor R200 then D200, where the charging circuitry resides. Remember that this gain factor is determined using Test 25 as a reference, make sure it was within limits also.

Test 34 BB Cal ICHAR Offset

Description:

Explanation of Result:

The offset is a result of the two current limits along with global value determined in Test 26 which is then used to calculate ICHAR offset.

Manual Verification:

In Phoenix set phone to local mode then EM Calibration. Press read from phone.

Troubleshooting:

For production the VCHAR voltage is sent to galvanic pads on the PWB. Check current sensing resistor R200 then D200, where the charging circuitry resides. Remember that this gain factor is determined using Test 26 as a reference, make sure it was within limits also.

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Test 35 BB Cal BTEMP Gain

Description

Explanation of Result

Manual Verification

Troubleshooting

Test 36 Test TX Start up Amplitude Limits [5,20]

Description:

This test turns on the AMPS transmitter and checks for the presence of a TX signal with an amplitude within a specified range. A wide range is allowed since the transmitter is not tuned yet.

Explanation of Result:

Amplitude of TX signal.

Manual Verification:

Set the phone to local mode and turn on the AMPS transmitter set to channel 384. Set the PDM values as listed in Table 1 for AMPS Power Level 5. Look for an output signal at

836.52 MHz with an amplitude within the limits. The frequency of the signal may not be

accurate since the VCTCXO has not been tuned yet.

Troubleshooting:

Check proper placement, rotation and soldering of the components in the TX chain. Check for the presence of LO tones as listed in Table 2. Check for presence of a TX signal at each point in the TX chain, probing according to Table 2.

Test 38 Test TX Start up Current Limits [300,600]

Description:

This test turns on the AMPS transmitter and measures current of the whole phone, which can detect some assembly errors.

Explanation of Result:

Current in milliamps.

Manual Verification:

Set the phone to local mode and turn on the AMPS transmitter PL5. Set the PDM values

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as listed in Table 1 for AMPS Power Level 5. Read the phone's current on the power supply and check to see that it is within the limits. If the power supply does not display current draw, use a current meter in series with the phone. If the phone powers down when the mode is set, it may be that the phone is drawing more current than the current limit setting on the power supply.

Troubleshooting:

If current is very high, there may be a short circuit on the phone caused by a solder bridge, a failed component that is internally shorted, a component placed with the wrong rotation which shorts two nodes that shouldn't be, or some other reason. A visual inspection can find solder bridges or wrong component rotations. A failed component can be found by functional tests of the phone's sub-blocks.

Test 39 TN VCTCXO Frequency Limits [-150, 150]

Description:

The purpose of this tuning is to determine what the AFC DAC value needs to be in order to center the VCTCXO frequency. The CDMA transmitter is turned on and no TX baseband modulation is provided. The carrier is then centered in frequency. This is done to the carrier after it has been mixed up to 836.52 MHz, since it's easier to measure the tolerance of 1 ppm at 836.52 MHz than it is at 19.2 MHz. Additionally the tone at 836.52 MHz can be measured without taking the phone apart.

Explanation of Result:

The result is a frequency offset in Hz of the 836.52 MHz carrier which must be within +/

- 150 Hz.

Manual Verification:

Using the RF Main Mode window in Phoenix, turn on the CDMA transmitter, and set it to channel 384. Do not add any modulation(Rho).

Using the RF Batch Tuning window, you can check the VCTCXO tuning value. Look for a transmitted tone on the spectrum analyzer at 836.52 MHz. If no tone is present, proceed to troubleshooting section.

Go to Phoenix PDM Control and follow instructions that follow. Center the carrier to within +/- 150 Hz of 836.52 MHz. (If sidetones are present, be careful to center the carrier and not one of the sidetones, which will probably have a higher amplitude than the carrier.) The values you enter in the "values" edit box are the AFC values which control the VCTCXO frequency. Start with a value of 0, then adjust until it is centered, staying within the limits.

Troubleshooting:

If there is no tone, probe pin 3 of G501 for a tone at 19.2 MHz. If this is not present check power supplies, particularly ensure 2.7v on VCTCXO Vcc pin, pin 4 of G501. Also check the control pin, pin 1 of G501, for a voltage between 0.4 and 2.7 v. If the voltages are correct, and soldering of all G501 terminals is correct, replace G501. If 19.2 MHz tone

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is present but tone at 836.52 MHz is not, troubleshoot CDMA TX chain as described in Tables 2 and 3.

If the carrier is present but it cannot be centered, there is a hardware problem. Check Table 7.

In the following procedure, performing frequency centering on the RF carrier at 836.52 MHz will detect frequency errors due to the VCTCXO and supporting hardware, which will be the majority of the problems, but will not detect frequency errors due to the hardware that uses VCTCXO tone at 19.2 MHz as a reference for VHF PLL's. Check then the VHF and UHF LO's should be at correct frequency. Since this will be time consuming and will probably only account for a small percentage of the failures, it is not recommended unless the situation justifies the time spent. The VHF LO is inside the Robin IC (N601) and troubleshooting of the cell UHF LO is according to Table 5.

If the carrier cannot be centered, check to see if you can adjust to 2.2v on pin 1 of G501. If you can, within the PDM range of +/- 150, then the circuitry that delivers the voltage is working correctly, and the VCTCXO has a problem. Troubleshoot it as described in the previous section. If you cannot adjust to 2.2v within the accepted range, then the AFC circuitry has a problem. Troubleshoot it as described in the previous section.

In the case that there is a fault with both the AFC circuitry and the VCTCXO, then several combinations of the previously described conditions are possible. Start by ensuring 2.2v on pin 1 of G501 using a PDM within the range +/- 150, then center the tone.

Test 40 - 44 TN TX IF AGC Cell Po (0) [or (1), (2), (3), (4), (5), (6)]

Description:

The IF gain curve is characterized by varying the TX_IF_AGC and measuring the transmit power.

Explanation of Result:

The results are TX power readings in dBm of the transmitted signal corresponding to given PDM settings of the Cell TX IF AGC.

C) Manual Verification:

Set the phone in local mode, then program it to Cell CDMA RX/TX mode on channel 384. Set modulation to IS95 voice in CDMA Control.

Set the Cell PA PDM to +218 decimal and the TX RF AGC to -512 decimal using the sliders in the PDM window under the RF menu.

Change the TX_IF_AGC to the settings in the following table, and measure the TX power levels, checking to see that they are within the specified range.

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PDM for TX IF AGC

(a) +388 decimal -27.5 - 13.5

(b) +228 -8.0 - 6.0

(d) 0 6.5 - 20.5

PChange the TX_RF_AGC PDM to +511. Leave the TX_IF_AGC at 0 and the PA_AGC at +218. Measure the output power. Subtract this power from the power measured in (d) above. This is the RF_AGC gain delta.

Leave the PA_AGC and TX_RF_AGC values as is, then enter the values listed below for the TX_IF_AGC. Measure the output power, then add to each the RF_AGC gain delta calculated above. Check that these sums are within the listed ranges.

PDM for TX IF AGC

Range for output power, in dBm

Range for sum:[output power + RF_AGC gain delta], in dBm

-150 29.0 - 42.0

-300 37.0 - 51.0

Troubleshooting:

Check Robin (N601) and supporting components. Also check D400, which generates the PDM signals. Check AGC PDM voltages according to Table 1. Troubleshoot the rest of the transmitter chain if necessary as described in Table 2.

Test 45 TN TX IF 11 dBm Set CELL Po

Description:

See previous tuning. This is the part of the previous tuning when the TX IF AGC is adjusted so that the output power is +11 dBm

Explanation of Result:

The result is a power in dBm. A perfect result would be +11.00 dBm.

Manual Verification:

See previous tuning.

Troubleshooting:

See previous tuning

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Test 46 - 51 TN PA AGC Cal Cell Po (0) [or (1), (2), (3), (4), or (5)]

Description:

These tunings model the cell PA gain curve by setting the PA AGC PDM to several values and measuring output power. First, the TX PA AGC and the TX RF AGC are set to (approximately) their maximum used values (not the maximum possible values, but the maximum of the range over which they are used). Then the TX IF AGC is set so that the transmit power on the antenna connector is approximately +11 dBm (this power is reported in the next tuning). Then, six PDM values are written to the PA AGC and the output power is measured for each. These values are reported in this tuning. The software then performs curve fitting to interpolate between the measured data points.

Explanation of Result:

The result is the transmitted power in dBm for each of the six PA AGC PDM settings (results labeled 0 through 5).

Manual Verification:

Turn on the cell CDMA transmitter in Phoenix using the RF Main Mode window, and set it to channel 384. Set modulation to IS95 voice in CDMA Control.

In PDM Control window set the TX_IF_AGC PDM to 0 decimal.

Set the PA AGC PDM to +218 decimal.

Set the TX RF AGC PDM to -512 decimal.

Adjust the TX IF AGC PDM so that the transmitted tone at 836.52 MHz measures +11 dBm +/- 0.5 dB on the antenna connector, using a spectrum analyzer (use 0 as a starting point). Note this value as it is needed in other troubleshooting sections.

Write the PDM values listed below into the PA AGC and record the output power. Check to see if the output power is within the ranges listed.

PDM for PA AGC

+218 decimal 10.5 - 11.5 Po(5)

-12 7.0 - 13.0 Po(4)

-202 4.0 - 11.5 Po(3)

Range for output power, in dBm

-268 2.0 - 10.5 Po(2)

-329 1.0 - 8.5 Po(1)

-366 -1.0 - 6.5 Po(0)

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Troubleshooting:

If the power readings are low, check the AGC voltages as in Table 1. You can also probe on the PA input as in Table 2 to find out if the power level is low going into the PA, or if the power level is correct going into the PA but the PA gain is too low. If the power level going into the PA is too low, probe the TX chain at all the other points prior to the PA listed in the table to see where the gain is lacking. When that point is identified, check the soldering of all related components, and replace components until the fault is found. If the power on the PA input is not low and the PA AGC voltage is correct, similarly probe the power at all points after the PA to find the fault, being extremely careful not to short the probing point to ground because this will instantly destroy the PA. Visually check soldering first, and probe on PA output as a last resort.

Test 52 - 56 TN TX RF AGC Cell Po (0) [or (1), (2), (3), or (4)]

Description:

This tuning characterizes the RF AGC curve by entering PDM values to the RF AGC and measuring the output power.

Explanation of Result:

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:

Turn on the Cell CDMA transmitter in Phoenix using the RF Main Mode window, and set it to channel 384. Set modulation to IS95 voice In CDMA Control.

In PDM Control window set the Cell PA PDM to -329.

Set the TX_IF_AGC to the value determined in tuning Test 50 above to give +11 dBm on the output.

Change the TX RF AGC to the settings in the table below, and measure the TX power levels, checking to see that they are within the specified range.

PDM for TX RF AGC

-512 decimal 0.5 - 11.5 Po(4)

Range for output power, in dBm

-67 decimal -3.5 - 9.5 Po(3)

-22 decimal -10.5 - 3.5 Po(2)

+418 -23.5 - -7.0 Po(1)

+511 -41.0 - -21.0 Po(0)

Troubleshooting:

Check Robin (N601) according to Table 2 and Table 3. Also check D400, which generates

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the PDM signals. Check AGC PDM voltages according to Table 1.

Test 61 - 67 TN TX Gain Comp Cell Po MD (or LO, LM, ML, MH, HM, or HI)

Description for this and next tuning:

This tuning ensures that the value of TxdBCtr correctly corresponds to the absolute TX output power. On the mid channel, with TxdBCtr set to a specified value, G_Offset is adjusted so that the output power is -8.0 dBm, and that value of G-Offset is recorded (which is an absolute value) in the next tuning. The output power in dBm is recorded in this tuning. After this is done on the mid channel, the channel is changed to each of the other channels, and output power is reported. (G_offset is not adjusted on the other channels as it was on the center channel, just the output power is recorded).

Explanation of Result:

The result is the transmitted power in dBm, which should be -8.25 to -7.75 dBm.

Manual Verification

Set the phone to local mode and program it to Cellular CDMA RX/TX mode on channel 384 using the Main Mode window.

Using the Phoenix PDM Control window, adjust Tx RF AGC "values" dialog box until the TX output power (measured on the RF connector with a spectrum analyzer) is equal to -

8.25 to -7.75 dBm. Once this is done on the center channel, change to each of the other

channels using CDMA Rx/Tx screen, and record the power. Do not adjust Tx RF AGC on the other channels, just record the power. It should be within the limits listed below.

Channel Cell Frequency Range for output power, in dBm

Low 991 824.04 MHz -11.5 to -4.5

LowMid 107 828.21 MHz -11.0 to -4.0

MidLow 245 832.35 MHz -11.0 to -4.0

Mid 384 836.52 MHz -8.25 to -7.75

MidHigh 512 840.36 MHz -10.0 to -3.0

HighMid 660 844.80 MHz -10.0 to -2.0

High 799 848.97 MHz -13.5 to -5.0

D) Troubleshooting:

If -8 dBm cannot be attained, troubleshoot Cell TX as described in the beginning of this document.

Test 68 TN G_Offset Cell MD

Description:

See description of previous tuning. This step reports G_Offset.

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Explanation of Result:

The result is the value of G_Offset which gives -8.0 dBm transmitted power.

Manual Verification:

See previous tuning. This is the value of G_Offset needed to get -8 dBm on the center channel.

Troubleshooting:

If G_Offset is not within the limits, troubleshoot the Cell TX as described in the beginning of this document.

Test 69 - 75 TN TX Limiting PO IS95 Cell, Low channel (or LowMid, MidLow, Mid, MidHigh, HighMid or High channel)

Description:

This tuning provides an upper limit on the transmit power while in Cell IS95 mode. The reason for this is to ensure that the phone never violates the SAR (Specific Absorption Ratio) limit, which is a health and safety specification that limits the amount of radiation near the user's head. The phone is set to transmit and TxdBCtr is adjusted for the maximum transmit power.

Explanation of Result:

The result is a power level in dBm, which is the maximum allowed. This is done on each of the seven channels.

Manual Verification:

Using Phoenix, set the phone to local mode, then turn on the Cell transmitter set to each of the channels in the list below. Set modulation to IS95 voice using CDMA Control.

Using the RF Tuning window, adjust TX RF AGC in PDM Control "value" until the TX power, measured on the RF connector with a spectrum analyzer, is within the limits on each of the channels below.

Channel Cell Frequency Range for output power, in dBm

Low 991 824.04 MHz 23.3 to 23.5 dBm

LowMid 107 828.21 MHz 23.6 to 23.8 dBm

MidLow 245 832.35 MHz 24.0 to 24.2 dBm

Mid 384 836.52 MHz 24.4 to 24.6 dBm

MidHigh 512 840.36 MHz 24.3 to 24.5 dBm

HighMid 660 844.80 MHz 24.2 to 24.4 dBm

High 799 848.97 MHz 24.1 to 24.3 dBm

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Troubleshooting:

If the maximum cannot be reached, either a component in the transmitter has too much loss, or not enough gain. Troubleshoot the Cell transmitter Table 2, with the phone set to the same channel as the failed channel.

Test 76 - 82 TN TX Limiting Po IS2K Cell: Low channel (or LowMid, MidLow, Mid, MidHigh, HighMid or High channel)

Description:

This tuning provides an upper limit on the transmit power while in Cell mode with CDMA2000 modulation. The reason for this is to ensure that the phone never violates the SAR (Specific Absorption Ratio) limit, which is a health and safety specification that limits the amount of radiation near the user's head. The phone is set to transmit and TxdBCtr is adjusted for the maximum transmit power.

Explanation of Result:

The result is a power level in dBm, which is the maximum allowed. This is done on each of the seven channels.

Manual Verification:

Using Phoenix, set the phone to local mode, then turn on the Cell transmitter set to each of the channels in the list below. Set modulation to C2k voice using CDMA Control.

Using the RF Tuning window, adjust TX RF AGC in PDM Control "value" until the TX power, measured on the RF connector with a spectrum analyzer, is within the limits on each of the channels below.

Channel Cell Frequency Range for output power, in dB

Low 991 824.04 MHz 23.3 to 23.5 dBm

LowMid 107 828.21 MHz 23.6 to 23.8 dBm

MidLow 245 832.35 MHz 24.0 to 24.2 dBm

Mid 384 836.52 MHz 24.4 to 24.6 dBm

MidHigh 512 840.36 MHz 24.3 to 24.5 dBm

HighMid 660 844.80 MHz 24.2 to 24.4 dBm

High 799 848.97 MHz 24.1 to 24.3 dBm

Troubleshooting:

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Test 100 -101 TS ACPR Cell - High(Low) Offset

Description:

ACPR (Adjacent Channel Power Ratio) is a measure of band power in the adjacent channel as compared to the tuned channel, so it is a power delta in dB. Band power is measured at the center tuned frequency and also at an offset lower (higher) than the center frequency, and the difference is ACPR. For this test, the offset is -0.9 MHz (+ 0.9 MHz).

Band power is integrated power over a frequency band, rather than at a single frequency. The bandwidth for the measurement centered at the tuned frequency is the bandwidth of the signal, which for IS95 is 30 kHz.

Explanation of Result:

Result is ACPR (a power delta) in dB.

Manual Verification:

Set the phone in local mode, and turn on the Cell transmitter set to channel 384. Use the TX Limiting function in the RF Tuning window to set the transmit power to the maximum value (within the limits for the "TX Limiting" tuning Test 72). Observe the TX signal on the spectrum analyzer. If the spectrum analyzer being used has a CDMA personality card, then ACPR can be read directly off the screen. If not, then set the bandwidth to 30 kHz, and set the averaging on. Center the marker at 836.52 MHz and note the power in dBm. Use the offset marker to measure the power at an offset of +/- 0.9 MHz.

Troubleshooting:

If one or more of the AGC values needs a value much higher than normal to achieve maximum power, then that would indicate that a component in the chain has less gain (or more loss) than it should, and another component that is compensating for that could be saturating. Use the AGC information as a guide to troubleshoot the Tx chain as described in Table 1a, especially being careful to check all decoupling capacitors C633, C649, C648, C619, C817, C810, C811, and C813. Severely degraded ACPR is detectable just by looking at the shape of the CDMA curve, therefore you can also probe each point in the TX chain to see if ACPR becomes degraded at one point.

Tests 103 - 109 TN AMPS PL2 Po Low (LowMid, MidLow, Mid, MidHigh, HighMid, or High)

Description:

This procedure tunes the AMPS transmit Power Level 0 on seven channels by adjusting TxdBCtr. The channels are: Low= 991, LowMid= 107, MidLow= 245, Mid= 384, MidHigh= 521, HighMid= 660, High=799. The algorithm then interpolates between the measured points for frequency compensation.

Explanation of Result:

The result is measured transmit power in dBm for power level 0 on each of the seven channels.

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Manual Verification:

Set the phone to local mode and turn on the AMPS transmitter to the channel which failed on Power Level 2. (adjusting for cable loss).

Troubleshooting:

Troubleshoot the cell transmitter as described in Table 2, setting the TX AGC values to those listed for Power Level 0 in Table 1.

Tests 111 - 115 TN AMPS PL3 (or 4, 5, 6, or 7) Po

Description:

This procedure tunes power levels 3 through 7, all on the center channel. Power level 0 was tuned in the previous test. (Power levels 0, 1 and 2 are the same for this phone.)

Explanation of Result:

The result is measured transmit power in dBm for power levels 3 through 7 on channel 384.

Manual Verification:

Use the same procedure as in previous tuning, but on channel 384 selecting corresponding Power Level. Note that the limits are different from the previous tuning.

Troubleshooting:

Troubleshoot the cell transmitter as described in the beginning of this document, setting the AGCs as in Table 1 for the power level which failed.

Test 118 TN TX DC Offset Carrier Suppression

Description:

The DC offset voltages on the I and Q inputs to the modulator are adjusted for minimal carrier feedthrough (maximum carrier suppression). Initially the DC offsets are set to a nominal value, and the power of a tone offset in frequency 20 kHz from the carrier is measured in dBm and recorded as a reference (in this tuning). Then in the next tuning, the carrier suppression (delta between center tone and tone that is offset 20 kHz) is measured. If it passes, it is reported in that tuning. If not, the DC offsets are adjusted until it passes, and the passing value is reported. This step reports the delta between the reference at 836.52 MHz + 20 kHz, and the minimum carrier level at 836.52 MHz.

Explanation of Result:

The result is a delta in dB between the reference at 836.52 MHz + 20 kHz, and the minimum carrier level at 836.52 MHz, found by adjusting the DC offsets for I and Q individually. The delta should be at least 35 dB.

Manual Verification:

Set up the phone as in the next Test 119 , and record the reference power of the offset tone. Measure the delta between the center and offset tones. If the delta is 35 dB or greater, the phone passes. If less than 35 dB, vary the "I" DC offset on the "values" line in

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the RF Tuning window, using the below listed values until the minimum carrier maximum delta is found. Leave Q at 0. On the "values" line, you enter "I,Q". The values, in decimal,

-560

-504

-448

-392

-336

-280

-224

-168

-112

-56 0

11 2 168 224 280 336 392 448 504 560

If the minimum is 35 dB or greater, the phone passes. If the minimum is less than 35 dB, then vary Q in the same manner as I using the above values, holding I constant at the minimum value determined above, until the delta is at least 35 dB.

Troubleshooting:

Check Robin (N601), UEM (D200), and associated components. Check TP's 1a - 1d.

Test 119 TN TX DC Offset Reference Power

Description of this and next tuning:

Explanation of Result:

The reported result is the power in dBm of the tone that is offset 20 kHz from the carrier, as measured on the antenna connector, with the nominal DC offsets applied.

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Manual Verification:

In Phoenix, use the RF Main Mode window to set the AMPS transmitter to channel 384.

Using the PDM Control window, set the I and Q DC offsets to 0,0 by entering 0,0 in the "values" edit box.

Center the transmit signal on the spectrum analyzer, set the span to 100 kHz. Lower the bandwidth so that the two sidetones can be differentiated from the carrier. Measure the amplitude of the sidetone at 20 kHz above the carrier. The amplitude of the sidetone will probably be higher than that of the carrier. The amplitude should be within the test limits.

Troubleshooting:

If the carrier is not present, troubleshoot the cell TX chain using the "things to check" list and probing tables/diagrams. If the two tones offset at 20 kHz are not present on the TX signal, check to see if they are on Robin output at L613 at 836.52 MHz + 20 kHz. If not, there is likely 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.

Test 121 - 123 TN RX IF AGC RXdBCtr (0) [or (1) or (2)]

Description:

This tuning calibrates the RX IF AGC curve, because the output power of the IF part of the Batman IC is not a linear function of RX_IF_AGC. The tuner injects three known signal power levels into the phone's receiver, and for each one the phone's AGC algorithm adjusts the RX_IF_AGC to get the same amplitude at the output of Batman, although different amplitudes are going in. From these three points, curve fitting is used to interpolate between measurement points.

Explanation of Result:

The result is a value of RxdBCtr (which corresponds to a value of RX_IF_AGC) for each of three CW input powers injected into the receiver:

-87.5 dBm

-57 dBm

-18 dBm

Manual Verification:

With the phone in local mode, use the Main Mode window to turn on the AMPS receiver set to channel 384. Using the RF Tuning window, perform the manual tuning three times, each time injecting the CW signal at the amplitudes listed above, one amplitude per tuning. Each time record RxdBCtr, which is returned by Phoenix during the manual tuning.

Troubleshooting:

While injecting a signal into the receiver, check the values of RSSI and RX_IF_AGC PDM value and, if needed, voltage. RSSI should be within +/- 2 dB of the actual power in dBm on the RF connector. Table 3a lists limits and typical values. The AGC will try to keep the

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same amplitude on Batman output, therefore if the AGC value is larger than normal, then the AGC is compensating for loss in the chain prior to the variable gain amplifier.

After checking RSSI and AGC value, if it is still necessary to probe to pinpoint the source of the error, use the AMPS probing Tables 9 through 11.

Test 178 - 179 TN LNA AMPS LowGain (or HighGain)

Description:

This tuning records RxdBCtr (which is automatically adjusted to produce the same amplitude on the receiver output no matter what the input is) for the receiver with the LNA in highgain mode, and again with the LNA in lowgain mode. For AMPS this is done only on the center channel.

Explanation of Result:

The result is a value of RxdBCtr.

Manual Verification:

Using Phoenix, choose this tuning in the RF Tuning window. Inject a CW signal that is 10 kHz offset from the center frequency of the channel that is being tuned. For AMPS, set the amplitude to -65 dBm. Record RxdBCtr, which is returned from Phoenix in the lowest field in the RF Tuning window.

Troubleshooting:

Check Alfred and supporting components, reference Table 9.

Test 126 - 139 TN LNA CELL LowGain (or HighGain) LO (or LM, ML, MD, MH, HM, HI)

Description:

Explanation of Result:

The result is a value of RxdBCtr.

Manual Verification:

Using Phoenix, choose this tuning in the RF Tuning window. Inject a CW signal that is 10 kHz offset from the center frequency of the channel that is being tuned. For Cell set it to -95 dBm. Record RxdBCtr, which is returned from Phoenix in the lowest field in the RF Tuning window.

Channel Cell

Low 991

LowMid 107

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Channel Cell

MidLow 245

Mid 384

MidHigh 512

HighMid 660

High 799

Troubleshooting:

Check Alfred and supporting components, reference Table 9.

Final UI test: Rho

Rho is a measure of CDMA transmit signal quality which encompasses other transmitter indicators such as phase error and magnitude error. Rho is measured with the phone in a phone call, and is read directly from the call box. Rho is measured with sector power = -75 dBm. If Rho fails, first check the signal purity of the LO's. Check synthesizer components and power supply decoupling. Reference Table 2.

Final UI test: Frame Error Rate (FER)

This measurement, also made in a phone call, measures the frame errors of the receiver in CDMA mode. A low amplitude signal (typically at receiver sensitivity level of -

104.0 dBm) is injected into the receiver, and the FER is recorded. FER is measured in percentage, and 0.5 % or lower is passing (w/ 95% confidence). Failures are most often caused by excess loss/insufficient gain in the receiver chain, (and sometimes by excess noise in the receiver). Check for correct signal levels and AGC values/voltages as described in Tables 8-12.

Final UI test: SINAD

SINAD (Signal-to-Noise-and-Distortion) is similar to a sensitivity/FER measurement for CDMA, but 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, with 12 dB as the passing limit. Check Tables 9-11.

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Probing/Troubleshooting Tables

When measuring CDMA transmit signals, if the spectrum analyzer does not have a CDMA personality card, then the CDMA signal power can be approximated by setting the Resolution Bandwidth to 1 MHz and using the marker. This is because CDMA signal power is measured by integrating power over a 1.23 MHz bandwidth, and the marker measures power at only one frequency.

In most cases, probing is done in local mode (i.e., not in a call). Situations may arise whereby the troubleshooter may need to probe while in a call, however in some cases probing may disturb the circuit so that the call drops.

Although the tables list power levels for many combinations of AGC values, it is generally only necessary to check one combination. The extra information is provided in case it may be useful in an unexpected situation. Likewise, although probing points and signal level information are given for each point in the receiver and transmitter chains, the troubleshooter is not expected to probe each point on every phone, only the suspected trouble spots.

Absolute power measurements were made with an Anritsu MT8802A using common RF probe. Other probes can be used (but should be high impedance so that the measurement does not load the circuit) but may very well have a different gain, therefore adjust the absolute measurements accordingly. Also, adjust measurements if using a probe attenuator.

Where a range is given for loss, typically the higher loss occurs at the band edges.

Power depends on the impedance of the circuit. For example, if a filter has a nominal loss of 5 dB, then straightforward probing on the input and output, then subtracting, might not result in 5 dB because the input impedance might be different from the output impedance. However, after mathematically adjusting the power on either the input or output to compensate for the difference in impedance, 5 dB is then calculated. Most components in the RF section have the same input and output impedance (50 ohms), but where this is not the case, absolute power is noted in the tables in dBm, rather than loss or gain in dB.

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.

Transmitter Probing

Table 1: Transmit Output Powers and Associated AGC PDM values and voltages

Channel 384 (Cell) fc= 836.52 MHz

AMPS

Probed RF RF power

TX RF AGC TX IF AGC power on PA AGC on RF

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PDM value

typical v typical v dBm typical v dBm

-409 0.17 -110 0.68 -15.2 +/- 3 dB -19 0.85 24.8 (PL0)

-409 0.17 -92 0.72 -13.2 +/- 3 dB -123 0.67 23.7 (PL3)

-409 0.17 -76 0.75 -15.4 +/- 3 dB -310 0.34 21.0 (PL4)

-249 0.45 -66 0.77 -19.4 +/- 3 dB -330 0.31 16.3 (PL5)

-104 0.70 -56 0.78 -22.4 +/- 3 dB -330 0.31 13.5 (PL6)

37 0.95 -48 0.80 -27.9 +/- 3 dB -330 0.31 10.4 (PL7)

-403 0.18 -115 0.680 -14 +/- 3 dB 220 1.29 25

-403 0.18 100 1.067 -38 +/- 3 dB -270 0.41 -2

200 1.25 100 1.067 -56 +/- 3 dB -331 0.31 -23

450 1.70 105 1.076 -70 +/- 3 dB -331 0.31 -39

511 1.81 170 1.190 -80 +/- 3 dB -331 0.31 -50

voltage

PDM value

voltag e

Balun Out PDM value voltage connector

CELL CDMA

See Table 3 for test points for AGC.

IMPORTANT NOTE: AGC PDM values will change (sometimes drastically) as the phone warms up. The table above lists PDM values for when the phone is first turned on. After 10 minutes at full power, PDM values will be different.

Table 2: RF/Analog Probing for Cell/AMPS Transmitter

Where to start checking if RF power not correct (soldering, shorts, DC power applied if active, correct voltage of DC signals, otherwise replace)

Check that UEM and Robin are soldered correctly.

Probing

Probing Point

Robin Tx I/Q input from UEM TP1a, TP1b, TP1c

Location on the board

and TP1d

Probed Absolute Power (dBm), or gain/loss (dB), or voltage (v)

Check with Osc probe for Input, check also for same dc offset on each point.

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Robin (N601)out=Balun (T604) in TP2a and TP2b Nominal loss

through Balun = 1 dB, but it will appear as 3-4 dB gain due to impedance difference. On Robin output you may see amplitude imbalance between 2 sides of probing point 2 due to impedance differences.

Balun (T604) out=Tomcat (N603) inTP3

TP4

Tomcat (N603) out= TX SAW filter (Z604) in

TX SAW filter (Z604) out= cell PA (N801) in

TP5 Gain=12-16 dB

TP6 Loss=2-3 dB

See Table 1. T604, C640, C642, L603, L604(check

through Tomcat

through SAW filter

N601 (ensure VREFRF02 is 1.35v as in TP17. Check AGC voltages/PDMs as in Table 1, T604, L604, L603, C640, C642, C907, N603 (including check for 3.6v on pin 5), D400 (including AGC voltage check in Table 1 ) Remember to check the state of FAST_AGC should be High in Analog mode TP13.

that VR2 is 2.8 Vdc @ TP14), N601, C907, N603 (including check for

3.6v [Vbat TP15] on pin 5 and 2.7v [enable TP16] on pin 4)

N603 (also ensure 3.6v on pin 5 and PD_CELL high, N601, C649, C639, Z604, N801 (Vbat)

Z604, N603, C610, N801 (Vbat)

Cell PA (N801) out= cell isolator (Z802) in

Cell isolator (Z802) out= cell duplexer (Z803) in

Cell duplexer (Z803) out= RF Connector (X814) in.

TP7, Probing here not recommend unless necessary, best to measure on RF connector.

TP8 Probing here not recommend unless necessary, best to measure on RF connector.

TP9 Probing here not recommend unless necessary, best to measure on RF connector

PA has variable gain, check Iref Cel at C811.

Loss=0.6 dB through isolator. Best to measure on RF connector.

Loss=1-3 dB through duplexer

N801 (including: check 3.6v on Vbat TP18), Z802, R805, R801, L801, D400 (including AGC voltage check in Table 1), N601 (check PA_AGC as in Table 1, also check IREF CEL at PA TP19) PA_BOOST not used in Haukka. If gain is insufficient at PA, press on N801 and check if RF output increases at RF connector. If yes, ground connection is incomplete.

Z802, N801 (Vbat), R805, R801, Z803

Z803, L750, N750, X814. If no cable connected to X814 then additionally X811.

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UHF LO at 1009.62 MHz for channel 384 At N601 Robin

VHF LO at 346.2 MHz for cell band, any channel

Power Detector TP33

TP20 Power

TP27 You can take RF probe and verify presence of LO at R613, but this won’t measure amplitude accurately)

TP34

approx.5 dBm. Measured with RF probe

Should measure power at ~

-6 to -12 dBm. Measured with RF probe

Measure according to Table 4

Check to see if LO is present. If no LO is present, check N601, C666, C519, C514, L501 and N502. Check regulator voltages VR2 and VR6 are at 2.78 Vdc. Proceed to Table 5 for further UHF LO troubleshooting.

Check that control voltage at TP28 is at 1.45 Vdc. Check loop filter components C612, C613, R607, R605, C632, R606. Check Resonant components C629, V602, C637, V601, C630, C631, L611, C638 and R613. Check VCO_BAND components R609 and C618, make sure voltage VR3 is present at 2.78 Vdc.

Check N806, L801, R805, R801, C807 and N601.

NOTE: Troubleshooting CDMA transmitter is same as Analog, differences are in PDM settings. See Table 1 for PDM settings.

Table 3: DC probing for Cell/AMPS Transmitter

Item to check setting

TX RF AGC See Table 1 TP10 See Table 1 D400 (UPP), R433, C426, R434,

TX IF AGC See Table 1 TP11 See Table 1 D400 (UPP), R427, C422, R428,

PA AGC See Table 1 TP12 See Table 1 D400 (UPP), R430, C424, R431,

PD_CELL High for TX

on, Low for TX off

VREFRF02 fixed TP17 1.35v D200, C606, N601

IREF_CEL variable TP19 2.95v PA_AGC, C811, N801, N601,

DC probing location on board

TP16 High=2.6v

DC Voltage

Low=0v

Items to check if voltage incorrect

C427, C429, V420, N601, R604

C423, C430, V421, N601, R611, C607, R601, Voltage VIO at 1.8 Vdc

C425, C431, V422, N601, R621

N601, C649, N603 (pin 4)

R630, R621.

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Table 4: RF and DC probing for Power detector AMPS mode

PWROUT

P_DET

Power Level

PL2 -10.2 dBm 1.42 Vdc

PL3 -11.5 dBm 1.57 Vdc

PL4 -16.9 dBm 1.70 Vdc

PL5 -19.7 dBm 1.83 Vdc

PL6 -23.4 dBm 1.89 Vdc

PL7 -27.9 dBm 1.94 Vdc

Power measured at L801 DC level measure at C807

Dc level measured at J603

VCO Probing

Table 5: UHF LO Troubleshooting

UHF LO at 1009.62 MHz for channel 384 N503 UHF LO Tx Buffer Amplifier

TP21 TP22

Check gain across N502 should be ~ 4dB.

Check Buffer Amp N502 has supply voltage VR6 at pins 4 and 6. Check components L520, R505, R506, R519, R509, C510, C506, L503, R502 and L771.

UHF LO at 1009.62 MHz for channel 384 G502 UHF LO

UHF LO at 1009.62 MHz for channel 384 N507 Synth PLL

UHF LO at 1009.62 MHz for channel 384 N507 VCTCXO input

TP23 Power approx. -2

dBm.

TP25 Power approx. –

21 dBm.

TP26

19.2 MHz at amplitude of

-28.0 dBm

Make sure there is 2.7V at pin 3 of G502 checking components R515, C511 and C501. Check that control voltage is present at pin 1 of G502. If voltage is

2.7V, check TP24 with a RF probe to see if UHF LO is present. Check L520, R506, L516 and C516.

If LO is present but incorrect frequency proceed to TP25 check control voltage when PLL locked should be 2.0 Vdc. Confirm Loop filter components C518, C508, R508, R503, C509, R550, and C550. Pay particular attention to C508, as it is easily damaged. Check supply voltage to N507 at pin 18 is @ 2.78 Vdc(VR4 via R501 is VPLL) and charge pump input voltage VR1A is at 4.75 Vdc at pin 20(check C504, R513 and C521). VIO should be 1.8 Vdc at pins 15 and 16.

Check that clock is present at TP26 at

19.2 Mhz C519. If not present proceed to Table 6.

CLK19M2_R at 19.2 MHz

TP29

Check C513

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Table 6: VCTCXO Troubleshooting

VCTCXO G501 at 19.2 MHz

TP30 AFC_Volt

PDM [0]=2.2V [-1024]=1.4 [+1023]=3.1

Check supply voltage VR3 at G501 is at

2.7 Vdc, verify C520, R512 and C505. Control voltage AFC should be ~ 1.27 Vdc, check R511, R510, C503 make sure VR1A is present at 4.75 Vdc. Check AFC PDM control in local mode using Table 7 as a reference.

CLK19M2_R TP29 19.2 MHz at

amplitude of

-24.0 dBm

CLK19M2_B TP32 19.2 MHz at

amplitude of

-24.0 dBm

CLK19M2_UPP TP31 19.2 MHz at

amplitude of

-21.0 dBm

Table 7: AFC PDM (Local Mode) AMPS

AMPS Mode

PDM AFC Frequency Output Frequency Output

Setting Voltage @ G501 using @ G501 using

Check C513

Check C512

Check Buffer Amplifier V500 for correct dc bias voltages via VR3. Emitter = 0.38 Vdc Base = 1.04 Vdc Collector = 1.75 Vdc Check components V500, C502, R520, R521, R522, R517, R518, C523, C525 and C524.

Oscilloscope Spectrum Analyzer

-1024 1370 mV 19.19 MHz 19.199515 MHz

-512 1780 mV 19.21 MHz 19.199735 MHz

0 2.2 V 19.23 MHz 19.199965 MHz

+512 2.65 V 19.23 MHz 19.200000 MHz

+1023 3.1 V 19.23 MHz 19.200220 MHz

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Receiver Probing

Table 8: Receiver PDM values

AMPS ch 384 LowGain

AMPS ch 384 HighGain

CELL ch 384 LowGain

CELL ch 384 HighGain

• In AMPS, ensure 210 mV on I,Q traces of Batman out, probing points

• Use CW signal for AMPS, use CDMA signal for CELL. Call box can

PDM lower limit

2 102 55 0.98 -65 dBm should be

127 215 173 1.19 -65 dBm

-1 106 60 0.99 -65 dBm

-119 -3 -64 0.78 -95 dBm

PDM upper limit

PDM Mean

PDM Mean voltageRXPower in

TP45 - 48.

generate both.

RSSI

within +/-2 dB of actual RX signal above -104 dBm, +2/-4 below -104

Table 9: RF Probing for Cell CDMA and AMPS Front End Receiver

Probing point

RF Connector (X814) out= cell duplexer (Z803) in.

Cell duplexer (Z803) out= Alfred (N750) in

Alfred (N750) LNA out= cell RX saw (Z751) in

Probed Probing location on the board

TP9 Loss=0.2 dB

TP35 Loss= 2 to 4dB

TP36 Gain=12-15

Absolute

Power (dBm),

or gain/loss

(dB)

through X814

through

duplexer

dB for high

gain mode

(GAIN_

CTL=high. Use

RF AGC status

window to

monitor state.),

Loss=-3 to –5

dB for low gain

What to check if RF power not correct (soldering, shorts, DC power applied if active, correct voltage of DC signals, otherwise replace)

X814, X811, X812, L805, C821 L806 and Z803.

Z803, L750, N750 (VRX)

N750 (Also ensure IF_SEL low for CDMA and high for AMPS, as in Table 11. Ensure GAIN_CTL is high if RX power is below the LNA switch point.), Z751, C755, L752, C757, R764, C753, R765, C750 and voltage VRX at N750 pin13(2.78 Vdc).

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Cell RX saw (Z751) out=Alfred (N750) mixer in

UHF LO at 1009.62 MHz in Cell CDMA/AMPS for channel 384

Alfred (N750) Mix_Out= at 128.1 MHz Alfred (N750) IFA_In=

Table 10: RF Probing for AMPS Back End Receiver

Alfred (N750) IFA_In= Alfred (N750) AMPS out=

TP40 This point not 50

TP37 Loss=1-3 dB

through SAW

filter

TP38 Approx.

-3 dBm

TP39

ohms. Will measure approx + 3 dB gain from IFA Amplifier. Using results fromTP39 as reference.

Rx 1

IF at

128.1 MHz is

usually

-5.0 to –7.0

dBm less than

original Rx

input ampli-

tude setting at

RF Test Set.

Ensure IF_SEL low for CDMA and high for AMPS, as in Table 11), N750, R765, C750, L757 and also reference next step(TP41) to ensure that impedance matching components from N750 to Z752 are correct.

Z751, N750, L757 and C758.

Check to see if LO is present. If no LO is present, check L771, R505 and L520. Refer to Table 5 for additional UHF LO troubleshooting.

Check LP filter components L753, C759, C766 and L770.

Alfred (N750) AMPS out= Amps RX IF filter(Z752) in=

AMPS RX IF filter (Z752) in= AMPS RX IF filter (Z752) out=

AMPS RX IF filter (Z752) out= Batman (N701) in=

TP41 Same results as

above if matching components are correct

TP42 This point not 50

ohms. Will measure Loss of =2-4 dB through Crystal filter

TP43 TP44

You will measure usually –10 dBm less than previous test point.

Check Z752, C784, L764, C781, L762, C783, C786, C761, L754, C782 and C767 also ensure dc voltage Vrx is present at L762.

Z752, L765, C777, L766, C778, L768, L767, C779, N701 (VR5, VR7, VIO)

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Troubleshooting — RF CCS Technical Documentation

Batman (N701) out= UEM (D200) in

VHF LO at 256.2 MHz TP49 VHF amplitude is

CLK19M2_B at 19.2 MHz TP50 Amplitude of

TP45 TP46 TP47 TP48

Table 11: DC Probing for Receiver

Adjust input frequency at RF Test Set so it is offset by 20 kHz. Measure frequency amplitude and voltage peak-peak. Should be 20 kHz signal with

2.75 Vpp. RX_IF_AGCPDM value set to –

256.

~ -8 dBm

-24.0 dBm

N701 (VR5, VR7, VIO, ensure 1.35v on VREFRF01 as in Table 11, also check RX_IF_AGC as in Table 11, R706, C704, R705, C706, R435, C428, C435. Check also the control signals to Batman(N701) PURX (J402), RF_BUS_EN1X(J608), RF_BUS_CLK(N507 pin 10) and RF_BUS_DATA(N507 pin 12).

N701, C701, C714, R703, R702, C715, R704, V701, C716, L701, C702, R705, C706.

Check C513 If signal not present continue TS using Table 6.

DC probing

Item to check setting

RX IF AGC See Table 8 for

PDM settings

GAIN_CTL High=LNA high

gain, Low=LNA low gain

IF_SEL High=

AMPS, Low= CDMA

VREFRF01 fixed TP54 1.35 v D200, C706, N701

Table 12: RF Probing for Cell CDMA Back End Receiver

Alfred (N750) IFA_In= Alfred (N750) CDMA out=

TP45a This point not 50

location on board

TP51 See Table 8 for typi-

TP52 High=2.4vmin,

TP53 High=2.4vmin,

ohms. Will measure approx + 8 to +12 dB gain from IFA Amplifier. Using results fromTP39 as reference.

DC Voltage

cal voltages

Low=0.3v max

Ensure IF_SEL low for CDMA and, as in Table 11), N750, R765, C750, L757 and also reference next step(TP45b) to insure that impedance matching components from N750 to Z753 are correct.

Items to check if voltage incorrect

D400, R435, C428, C435, N701

N701, N750, R764, C753

N701, N750, R765, C750

Alfred (N750) CDMA out= CDMA RX IF filter(Z753) in=

TP45b Same results as above

if matching components are correct

Check Z753, C784, L764, C781, L762, C783, C786, C761, L754, C782 and C767 also ensure dc voltage Vrx is present at L754.

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CDMA RX IF saw (Z753) out= Batman (N701) in

Batman (N701) out= UEM (D200) in

VHF LO at 256.2 MHz TP49 VHF amplitude is ~ -

CLK19M2_B at 19.2 MHz TP50 Amplitude of

TP46a TP47a

TP45 TP46 TP47 TP48

You will measure a loss that is usually –15 to -17 dBm less than previous test point.

Measure voltage peak-peak. RX_IF_AGC PDM value set to –256.

7.0 dBm

-24.0 dBm

RF Power Supplies

Table 13: DC Supplies for RF circuitry

Z753, N750 and supporting components L759, C770, C771, C772, L760, L761, N701

N701 (VR5, VR7, VIO, ensure 1.35v on VREFRF01 as in Table 11, also check RX_IF_AGC as in Table 11), R706, C704, R705, C706, R435, C428, C435. Check also the control signals to Batman(N701) PURX (J402), RF_BUS_EN1X(J608), RF_BUS_CLK(N507 pin 10) and RF_BUS_DATA(N507 pin 12).

N701, C701, C714, R703, R702, C715, R704, V701, C716, L701, C702, R705, C706.

Check C513 If signal not present continue TS using Table 6.

Supply Voltage Supplied Components

VR1A 4.75 VCTCXO, UHF PLL, Charge Pump

VR1B 4.75 Robin

VR2 2.78 Robin, Power Detector

VR3 2.78 Robin, VCTCXO

VR4 2.78 UHF PLL

VR5 2.78 Batman

VR6 2.78 UHF LO Buffer

VR7 2.78 Batman

APPENDIX A: Phoenix Instructions

Phoenix Paths:

Local Mode: Troubleshooting - DSP/MCU - Phone Control - Phone State - Local -- Execute

Normal Mode: Troubleshooting - DSP/MCU - Phone Control - Phone State - Normal -Execute

Reset Phone: Troubleshooting - DSP/MCU - Phone Control - Phone State - Reset

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AMPS Rx: Troubleshooting - RF - Main Mode, Band Cell(AMPS), Mode (Rx), Channel ?, Set.

CDMA Rx: Troubleshooting - RF - Main Mode, Band Cell(CDMA), Mode (Rx), Channel ?, Set.

AMPS Tx: Troubleshooting - DSP/MCU - AMPS Control - Tx Control , Set Channel ?, Power Level (0-7), Check Transmitter On, Execute.

CDMA Tx: Troubleshooting - RF - Main Mode, Band Cell(CDMA), Mode (Rx/Tx), Channel ?, Set.

CDMA Control(Rho): Must set CDMA Tx first, Then DSP/MCU - CDMA Control, State Rho ON, Band Cell, Set default PDM values, Radio Configuration ?.

CDMA Control(Rho): Must set CELL Tx/Rx first, Then DSP/MCU - CDMA Control, State Rho ON, Band CELL, Set default PDM values, Radio Configuration ?.

PDM Control: Troubleshooting - RF - PDM Control, select settings then Set.

Batch Tunings: Troubleshooting - RF - Read Parameters, Load File (template.tun) then open, Read all.

I/Q Offsets: Troubleshooting - RF - Test Tones, slide bar for setting, select SSB-SC, and press Set.

Audio Control: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - Audio Test, select Audio Loop, Loop to ON, Do Not select "Set Audio Test Mode".

Buzzer Control: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - Audio Test, select Frequency and Strength, then Volume to ON.

ADC Readings: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - ADC Readings, Make Sure Battery Current and Battery Current Fast are not selected, Press read.

BB Self Tests: Set Local Mode First, Testing/Troubleshooting - Baseband Testing -BB Self Tests, Run All.

Display Test: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - Display Test, Select test and Pattern.

LED's Test: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - Display Test, Select Keypad and/or LCD Lights.

Keyboard Test: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - Keyboard Test, Press key on Phone and look at result.

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Vibra Test: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - Vibra Test, Vibra State to Enable, Vibra Intensity to ?.

Phone Information: CDMA - Phone Information.

Phone Settings: CDMA - Phone Settings.

EM Calibration: Set Local Mode First, Testing/Troubleshooting - Baseband Testing - EM Calibration.

To turn off Cell CDMA Transmitter

Under the RF menu, choose Main Mode, which opens the dialog box shown below.

To turn on the transmitter, first turn on the carrier by highlighting "RX/TX" in the subwindow at the top (which also turns on the receiver), typing the channel in the Channel field, then clicking the Set button in the upper right-hand corner.

Next, turn on the modulation by opening the CDMA Control dialog box under the DSP menu. This dialog box is shown next.

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Highlight "Rho" in the Functions field, and click Rho ON in the State field. Choose Cell in the Band field. Under Radio Configurationm choose the desired configuration. C2K is an abbreviation for IS2000. Click Execute.

To turn on the AMPS transmitter

Eventually, the method will be to use the RF Main Mode dialog box as shown above, choosing AMPS in the Band field. However, at the moment there is a software problem with this method, with the result that once the AMPS transmitter is turned on in this manner, it does not respond correctly to AGC PDM adjustment.

As a temporary solution, the AMPS Control dialog box, shown below, can be used.

Select the desired channel and power level, click Transmitter ON, then click the Execute button. The reason why this is a temporary solution is because in some instances, the AFC and AGC are not disabled, with the results that the signal will not be stable in fre-

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CCS Technical Documentation Troubleshooting — RF

quency and will not respond to AGC PDM adjustment. If this is the case, manually disable the AFC and AGC using the DSP Memory dialog box that follows.

Choose the"Data option in the Address Space field, type in the address, leave the Subcount entry at 1, then click the Add button. The address will then be displayed in the field in the lower half of the window. Use this method to enter in both the AFC Disable and AGC Disable addresses. These addresses can be obtained from R&D, and they can change with software version. This is the reason this method is temporary.

Once both addresses are entered, check "Periodic Read On", then click "Stop". Then click the "Read" button, which will display the values in both addresses. Both should be "1". Change both to "0" by clicking on the "1", which will highlight the data in the address, then you can edit the contents and change the "1" to a "0". Hit the return button on your keyboard to enter the new value. Once the contents of both addresses are changed to "0", click the "Write" button, which writes them into the phone. This data will remain in the phone until the phone is powered down.

To turn on the receiver only, in any mode

To turn on the receiver only, use the Main Mode dialog box as shown previously, highlight RX. In the Band field, choose Cell CDMA.

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To verify a single, manual tuning

Open the RF Tuning window, shown below. The tuning descriptions at the beginning of this document describe the tuning and tell you what you need to enter, if anything, and what values will be returned to you from the phone, if any.

According to these descriptions, choose Self-Tuning for self tunings, and RF Tuning for the others. Choose the appropriate test from the Tuning Names list. Values that you must enter are entered in the Values dialog box. If more than one value is entered, enter a delay time in seconds in the Delay box. This is the delay between applications of the multiple values entered. Three seconds is sufficient for all tests to run; however, in certain cases you may want to increase the delay in order to closely observe the phone's behavior during the tuning.

Any data returned from the phone is displayed on the status line, the box at the bottom which in the following figure says "8 tuning, 7 self-tune Ids configured". If no tuning value is returned, this line will indicate if the tuning was successful or not. To begin a tuning, click the Tune button.

To adjust PDM values of AGCs and AFC

In the PDM dialog box, whic follows, are several sliders, one each for each of the AGCs and the AFC. Drag the slider pointer with your mouse to the value that you want to set. The values are in decimal. Then click Set. Alternatively, you can click the up and down arrows next to the value fields below the sliders, which will increase or decrease the value one step at a time. If you do this, you do not have to click Set.

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To read tuning values from the phone

Open the Batch Tune dialog box, as shown below. To read the tuning values from the phone, click the Read All button under the Phone heading. However, in order for the tuning values to be displayed, you must first load the template file by clicking the Load File button under the Parameter File field. Ensure that the template file used is appropriate for the software version in the phone.

To read RSSI and AGC PDM values from the phone

Open the AGC Status dialog box, which follows. Click Enable Trace. RSSI is the value near the antenna on the receiver side. 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 following diagram from right to left, IF_AGC, RF_AGC, PA_AGC.

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To load a PRL into the phone

Use the PRL dialog box as shown below. Click the Load PRL From File button, and choose the desired file, which will then appear in the list on the left side of the window. Highlight the desired file in the list so that it is blue, then click the Write PRL To Phone button. At the bottom of the dialog box, a status message will indicate if the file was loaded correctly or not.

To change between Normal and Local modes

To make a call, the phone should be in normal mode. In normal mode, the phone soft-

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ware 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 should be in local mode. In local mode, the phone's software is not running and it will not search for a pilot. To switch between normal and local modes, use the Phone Control dialog box, shown next. This setting will be lost if the phone is powered down.

To add a baseband to the AMPS transmitter

To add a baseband test tone to the AMPS transmitter, open the Test Tone dialog box as shown next and set the parameters as desired.

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APPENDIX B: Definitions

ACPR: Adjacent Channel Power Ratio. A ratio of power at an offset frequency as compared to the power at the center frequency.

ADC: Analog to Digital Converter

AGC: Automatic Gain Control

AFC: Automatic Frequency Control

CW: Continuous Wave. This is a pure sine wave with no modulation such as CDMA or FM.

DAC: Digital to Analog Converter

dB: A power ratio. Formula is 10log(power1/power2). It is used to denote differences, such as gain or loss. Power1 and power2 are in linear units such as W or mW.

dBm: A unit for an absolute power level. Formula is 10log(power in mW/1 mW).

LNA: Low Noise Amplifier

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LO: Local Oscillator. This is a CW signal used to mix signals up or down to a different frequency.

PA: Power Amplifier

PDM: Pulse Density Modulation. This is used for control signals. The density of a stream of digital voltage pulses is varied proportionally to the desired control level, then it is converted to an analog voltage used as the control signal.

PLL: Phase Locked Loop. Used in Synthesizer circuits to generate an LO.

PPM: part per million

RSSI: Received Signal Strength Indicator.

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Radio Portion of Phone Front Panel

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Measure 2.7V

TP23

TP24

TP22

TP21

TP29

TP25

TP26

TP31

TP30

CCS Technical Documentation Troubleshooting — RF

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TP6

TP3

TP27

TP16

TP15

TP4

TP2a

TP20

TP14

TP2b

TP17

Troubleshooting — RF CCS Technical Documentation

Robin View

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TP52

TP36

TP37

TP39

TP38

TP40

TP53

TP43

TP45a

TP49

TP45

T T T

CCS Technical Documentation Troubleshooting — RF

Alfred View

P46

P44

P45b

P47 P48

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TP18 (pin 1)

V T I

TP19 Iref_Cell

TP7

TP34

TP33

TP8

TP9

Troubleshooting — RF CCS Technical Documentation

bat on N801.

P19 (pin3)

ref on N801

det_power

det_Voltage

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TP1a T T T

TP9

CCS Technical Documentation Troubleshooting — RF

Back Panel test points

P1b P1c P1d

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TP12

TP51

TP10

TP11

TP13

Troubleshooting — RF CCS Technical Documentation

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Nokia 2280 Service Manual 11 rh17rf

Specifications and Main Features

Frequently Asked Questions

User Manual

Test Steps

Troubleshooting Summary

Probing/Troubleshooting Tables

APPENDIX A: Phoenix Instructions

APPENDIX B: Definitions