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CCS Technical Documentation
RH-3 Series Transceivers
Troubleshooting - RF
Issue 1 06/2003 Confidential Nokia Corporation
RH-3
Troubleshooting - RF CCS Technical Documentation
Page 2 Nokia Corporation Confidential Issue 1 06/2003
RH-3
CCS Technical Documentation Troubleshooting - RF
Contents
Page No
RF Troubleshooting ....................................................................................................... 5
RH-3/RH-3P General Troubleshooting Notes .............................................................5
Conditions of Phone ....................................................................................................5
TX Power Low .......................................................................................................... 5
Receiver Not Working Properly................................................................................ 6
Phone Cannot Make a Call........................................................................................ 6
Transmitter Troubleshooting .......................................................................................7
Cell Transmitter......................................................................................................... 7
PCS Transmitter ...................................................................................................... 14
Receiver Troubleshooting ..........................................................................................21
Cell Receiver ........................................................................................................... 21
PCS Receiver........................................................................................................... 28
GPS Troubleshooting .................................................................................................36
GPS Receiver .......................................................................................................... 36
GPS RF Quick Fault-finding Chart......................................................................... 39
Block Diagrams............................................................................................................ 40
Transmitter .................................................................................................................40
Receiver .....................................................................................................................40
Synthesizer .................................................................................................................41
GPS ............................................................................................................................41
Frequency Plan ..........................................................................................................42
Jedi .............................................................................................................................42
Yoda ...........................................................................................................................43
Description of RF ASICs ............................................................................................. 43
Jedi (N601) ................................................................................................................43
Yoda (N700) ..............................................................................................................44
Alfred (N901) ............................................................................................................44
Orca (N803) ...............................................................................................................44
Shamu (N802) ............................................................................................................44
GPS ASIC (N054) .....................................................................................................44
Probing Diagrams ........................................................................................................ 44
Tuning Descriptions ..................................................................................................... 50
Issue 1 06/2003 Nokia Corporation Confidential Page 3
RH-3
Troubleshooting - RF CCS Technical Documentation
Page 4 Nokia Corporation Confidential Issue 1 06/2003
RH-3
CCS Technical Documentation Troubleshooting - RF
RF Troubleshooting
RH-3/RH-3P General Troubleshooting Notes
When troubleshooting the receiver, first check the RX_AGC PDM value. The AGC value
should be close to the typical values in the tables. Since the RX AGC will try to keep a
constant amplitude at the output of the receiver chain, if the AGC value indicates an
AGC gain that is substantially higher than normal, then the AGC is compensating for
extra loss in another component. If the AGC PDM values are normal, but there is still a
problem, check the actual AGC voltages. RF probing at specific locations in the chain can
then help to pinpoint the source of the problem.
Likewise, when troubleshooting the transmitter, first check the measured output power
and AGC values, which will give an indication of where to start probing.
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 Agilent (HP) 85024A active high-
impedance 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; there-
fore, adjust the absolute measurements accordingly. Also, adjust if using a probe attenu-
ator.
Where a range is given for loss, typically the higher loss occurs at the band edges. Prob-
ing is not a very accurate method to measure absolute power; therefore, you cannot
expect measured results to exactly match the numbers listed here.
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. Most components in the RF section have the same input and output imped-
ance (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.
Note: After opening the shield lids, allways replace them with new lids.
Conditions of Phone
TX Power Low
If TX power is low, turn on transmitter in local mode using Phoenix. Check:
Issue 1 06/2003 Nokia Corporation Confidential Page 5
RH-3
Troubleshooting - RF CCS Technical Documentation
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 analyser 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 ampli-
tude, use probing tables to determine where in the chain the fault occurs, with
AGC PDMs set for known transmit power as listed in the tables.
4 Check that AGC PDMs are set for desired TX power and ensure AGC voltages are
correct.
5 Check the LOs for proper frequency and amplitude.
6 Ensure power supplies to transmitter have correct voltage.
Receiver Not Working Properly
If Receiver is not working properly, turn on receiver in local mode and check:
1 Turn on receiver with Phoenix, inject a signal into the receiver.
2 Check the AGC PDM.
3 Perform a visual inspection of the PWB under a microscope to check proper
placement, rotation, and soldering of components.
4 Measure signal levels at various points in the chain and determine where in the
chain the fault lies.
5 Check the LOs for proper frequency and amplitude.
6 Ensure power supplies to receiver have correct voltage.
Phone Cannot Make a Call
If phone won't make a call:
1 Ensure phone is in normal mode (i.e., ensure the phone is searching for a signal,
net server is on).
2 Ensure Preferred Roaming List (PRL) is loaded into phone.
3 Ensure phone is tuned (read tuning parameters using Batch Tune component in
Phoenix, an untuned phone will have all zeros in tuning file), and has passed tun-
ing.
4 Ensure call box channel is set for a channel in PRL, and ensure SID is correct.
Page 6 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
5 Ensure MIN, MDN, and SID are entered into the phone.
6 Ensure VCTCXO is centered, as described in VCTCXO tuning description.
7 Ensure transmitter and receiver are working properly by checking them in local
mode.
Transmitter Troubleshooting
Cell Transmitter
Cell Transmitter Path
The following table indicates the test points to probe when troubleshooting the cell
transmitter path. The steps shown are the recommended but do not have to be followed
in that order. Refer to the Appendix for a reference diagram that illustrates the test
points on the circuit board. An HP high frequency probe is used to make the frequency
and output power measurements.
Constant Reference
Values
CELL Oscillator and IF:
VHF Tx Lo Tx IF
457.2 228.6
VHF Rx Lo Rx IF
367.2 183.6
Setup: CW or
Tx Rx Band BB GenIO PDM Rho
Mode CDMA
Local On On PCS/CELL CDMA GenIO 8 = H TxIF and RF On
AGC = 0
Chnn Tx Freq Rx Freq UHF GenIO 12 = L
384 836.52 881.52 1065.12 GenIO 13 = L
600 1880 1960 2143.6
Issue 1 06/2003 Nokia Corporation Confidential Page 7
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Troubleshooting - RF CCS Technical Documentation
Typical
Step # Part Part Ref Label Test Point Units Comments
Value
1 Jedi Pin 7 I+ J601 0.1 to 0.9, VAC, VDC Test Point on
1.7 BB side
2 Jedi Pin 8 I- J602 0.1 to 0.9, VAC, VDC
1.8
3 Jedi Pin 4 Q+ J603 0.1 to 0.9, VAC, VDC
1.9
4 Jedi Pin 5 Q- J604 0.1 to 0.9, VAC, VDC
1.10
5 Jedi Pin 45 IF CELL- top-C603 -45, 228.6 dBm/30kHz,
MHz
6 Jedi Pin 46 IF CELL+ bottom-C603 -45, 228.6 dBm/30kHz,
MHz
7 Jedi Pin 31 CELL_DRVout pin 1-Z601 -38 dBm/30kHz
8 Z601 Pin 3 SAW out pin 3 -40 dBm/30kHz
9 Orca Pin 2 RF in pin 3-Z601 -40 dBm/30kHz
10 Orca Pin 8 PA out left-R814 -17.5 dBm/30kHz
11 Z802 Pin 1 Iso Out=Dup pin 11-Z803 dBm/30kHz This test point
In is inaccessible
12 Z803 Pin 8 Dup-Ant pin 8 -19 dBm/30kHz This point is
only accessi-
ble if the CELL
duplexer can
shield is
removed
13 Z800 Pin 3 Diplexer left-L802 -19
Cell Power Amplifier
The table above is the path that one would take to determine where the problem is in the
transmitter path. There are other circuits that affect the operation of the transmitter
path; for example, the power amplifier (PA) has the DC/DC converter (PMIC device)
which controls it. The following tables illustrate the circuits that have an effect on the
transmitter path and how to troubleshoot them.
The following table illustrates the PA troubleshooting information.
Page 8 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
PA Power and Gain Measurements
Power Amplifier Input Power Amplifier Output
Test Point Test Point
pin3-Z601 right-R814
PA Power and Gain Specifications
Power
Nominal Vcc Test
Mode Name Output Vcc Range
Gain Point
Range
Gain mode 0 V0 up to 9 23.8 0.75- 0.88 C806
Gain mode 1 V1 9 to 13 25.2 1.125- 1.375 C806
Gain mode 3 V2 Not used Not used 2 - 2.5 C806
Gain mode 2 Bypass 13 up 29 3-4 C806
Overall Gain V0 to 9 3.5 to 7.3
Bypass +/- 0.5
unit N/A dBm dB VDC N/A
PA Gain Step PA Vcc Spec
Gen IO 12 GenIO13 volt (v) Name
L L 0.8 V0
H L 1.2 V1
L H 2.2 V2
H H 3.7 Bypass
* Depends on VBATT
Cell PMIC
The following table illustrates the PMIC troubleshooting information.
Setup:
Mode Tx Rx Band
Local On On PCS/CELL
Issue 1 06/2003 Nokia Corporation Confidential Page 9
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Troubleshooting - RF CCS Technical Documentation
Measurements:
Depends
Pin Label Test Point Units Comments
on
1 EP Pin 1 1.8 UPP IC enable = GenIO 10
2 M0 Pin 2 1.8 UPP Control 0 = GenIO 12
3 M1 Pin 3 1.8 UPP Control 1 = GenIO 13
4 NC NC NC NC NC
5 FB Pin 5 0.75 - 4 M0, M1 See PA worksheet. Output to fly-
back inductor
6 FB Pin 6 0.75 - 4 M0, M1 Shares PWB pad with pin 5
7 BYPVout bottom- 0.75 - 4 M0, M1 PMIC bypass output used at Pout
C808 > 12 dBm
8 VDD right-L810 VBATT VBATT Digital DC supply, shared with
pin 12, 14, 15
9 VSS GND GND GND Digital GND, shared gnd with pin
13
10 NC NC NC NC NC
11 Vbgap NC NC NC Bandgap voltage output
12 VDD right-L810 VBATT VBATT Digital DC supply
13 Vss GND GND GND Digital GND, shared gnd with pin
9
14 Vsw right-L810 VBATT VBATT Switcher supply
15 Vsw right-L810 VBATT VBATT Switcher supply
16 Gsw GND GND GND Switcher GND, does not share
with pin 9 and pin 13
Good phone PMIC
Resistances
Pin Resistance
1 60k
2 75k
3 80k
4 1.59M
5 1.6M
Page 10 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
Good phone PMIC
Resistances
Pin Resistance
6 2M
7 2M
8 2M
9 0.1
10 100
11 115k
12 60k
13 0.2
14 1.3M
15 1.18M
16 0.1
Cell IF and RF AGC and PA Control
The following table illustrates the PDM values and their typical values for the IF AGC, RF
AGC Jedi Pout, Gain steps, and the PA VCC levels. It also shows the typical power output
at the RF connector.
Issue 1 06/2003 Nokia Corporation Confidential Page 11
RH-3
Troubleshooting - RF CCS Technical Documentation
.
Cell CDMA Chnn 384
PA Gain
TX RF AGC TX IF AGC Jedi Po PA Vcc
Step
Con
Typi Typi Typi Typi n RF
Gen Gen
cal Test cal Test cal Test cal Test PA Pout
PDM PDM IO IO
Valu Point Valu Point Valu Point Valu Point Gain
12 13
e e e e
-324 0.41 Bottom -324 0.41 Top -17 pin 1 H H 3.47 C806 DM 25
C606 C605 Z601
-226 0.56 -226 0.56 -21 H H 3.61 28 20
-146 0.68 -146 0.68 -21 H H 3.67 28 15.1
-146 0.68 -146 0.68 -27 H L 1.2 26 13
-111 0.74 -111 0.74 -28 H L 1.2 25.8 10.3
-111 0.74 -111 0.74 -28 L L 0.82 24.5 9
-6 0.9 -6 0.9 -35 L L 0.82 0
52 1 52 1 -45 L L 0.82 -10
105 1.09 105 1.09 -54 L L 0.82 -20
180 1.09 180 1.21 -64 L L 0.82 -30
266 1.36 266 1.36 -74 L L 0.82 -40
353 1.5 353 1.49 -83 L L 0.82 -50
Cell Power Detector
The following tables illustrate the measurements required for troubleshooting the Cell
power detector.
Setup:
Mode Tx Rx Band Chnn Rho
Local On On PCS/CELL 600/384 On
Input Chnn Tx Freq Rx Freq
384 836.52 881.52
600 1880 1960
Page 12 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
Measurements:
CELL, Channel 384
TX
PA Gain Step Power Detector Comments
ADC
Conn RF
Pout
RF/IF GIO GIO Pout at Test Test Det=Detector
Det Out mA
pdm 12 13 detector Point Point Po=Power
353 L L -50 -86.3 right 2 left 235 CELL band and
R814 C807 detector cou-
pling is about
22 dB
140 L L -25 -63 2 235
-5 L L 0 -41 1.998 235
-105 L L 9 -30 1.967 250
-105 H L 10 -29 1.957 268
-143 H L 13 -26 1.93 286
-143 H H 14.9 -23.5 1.9 435
-175 H H 17 -21.5 1.86 486
-210 H H 19 -19 1.812 550
-246 H H 21 -17 1.745 630
-286 H H 23 -15 1.667 730
-330 H H 25 -12 1.547 860
-352 H H 26 -11.5 1.485 950
-365 H H 26.5 -11 1.44 1000
-387 H H 27.5 -10 1.36 1095
none dBm dBm/ VDC dBm only
30kHz refers to total
power meas-
ured
Detector Reference and DC Supply
Typical
Label Test Point
Value
Det Ref left-C803 2
Det Supply bottom-C257 2.8
Issue 1 06/2003 Nokia Corporation Confidential Page 13
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Troubleshooting - RF CCS Technical Documentation
Detector Reference and DC Supply
Typical
Label Test Point
Value
VDC
PCS Transmitter
PCS Transmitter Path
The following table indicates the test points to probe when troubleshooting the PCS
transmitter path. The steps shown are the recommended but do not have to be followed
in order. Refer to the Appendix for a reference diagram that illustrates the test points on
the circuit board. An HP high-frequency probe is used to make the frequency and output
power measurements.
Constant Reference
Values
PCS Oscillator and IF:
VHF Tx Lo Tx IF
527.2 263.6
VHF Rx Lo Rx IF
367.2 183.6
Setup:
CW or
Mode Tx Rx Band BB GenIO PDM Rho
CDMA
Local On On PCS/CELL CDMA GenIO 8 = H Tx IF and On
RF AGC = 0
Chnn Tx Freq Rx Freq UHF GenIO 12 = L
384 836.52 881.52 1065.12 GenIO 13 = L
600 1880 1960 2143.6
PCS TX
Step Typical
Part Part Ref Label Test Point Units Comments
# Value
1 Jedi Pin 7 I+ J601 0.1 to 0.9, VAC, VDC
1.7
Page 14 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
PCS TX
Step Typical
Part Part Ref Label Test Point Units Comments
# Value
2 Jedi Pin 8 I- J602 0.1 to 0.9, VAC, VDC
1.8
3 Jedi Pin 4 Q+ J603 0.1 to 0.9, VAC, VDC
1.9
4 Jedi Pin 5 Q- J604 0.1 to 0.9, VAC, VDC
1.10
5 Jedi Pin 45 If PCS- top C604 -44, 263.6 dBm/30kHz,
MHz
6 Jedi Pin 46 IF PCS+ bottom -44, 263.6 dBm/30kHz,
C605 MHz
7 Jedi Pin 31 PCS_DRVout_A bottom -51, 1880 dBm/30kHz, A output is for
L604 MHz chnns 25 to 599.
This measured
power is leakage.
8 Jedi Pin 31 PCS_DRVout_B right L605 -30, 1880 dBm/30kHz, B output is for
MHz channs 600 to
1175
9 Z602 Pin 1 SAW out A pin3 N602 -56 dBm/30kHz The outputs of
Z602 and the
inputs to N602
are difficult to
reach
10 Z602 Pin 3 SAW out B pin 1 N602 -32 dBM/30kHz If not necessary,
skip to the PA
input measure-
ment
11 Shamu Pin 4 RF in left C640 -32 dBm/30kHz
12 Shamu Pin 8 PA out left R803 -9 dBm/30kHz Accessible only if
Isolator shield
can is removed
13 Z801 Pin 6 Iso Out=Dup In none none dBm/30kHz Accessible only if
PCS duplexor
shield can is
removed
14 Z804 Pin Rx ant none none dBm/30kHz Accessible only if
PCS duplexor
shield can is
removed
15 Z800 P3 Diplexer left L802 -14 dBm/30kHz
PCS Power Amplifier
The preceding table is the path that one would take to determine where the problem is in
Issue 1 06/2003 Nokia Corporation Confidential Page 15
RH-3
Troubleshooting - RF CCS Technical Documentation
the transmitter path. There are other circuits that affect the operation of the transmitter
path; for example, the power amplifier (PA) has the DC/DC converter (PMIC device) that
controls it. The following tables illustrate the circuits that have an affect on the trans-
mitter path and how to troubleshoot them.
The table below illustrates the PA troubleshooting information.
PA Power and Gain Measurements
Power Amplifier Input Power Amplifier Output Power Amplifier Output
Test Point Test Point 1 Test Point 2
right C640 * left R803 ** right C804
* inaccessible unless shield can is removed (no lid)
** This is the coupled power. You must 30 dB to get correct value
PCS PA Power and Gain Specifications
Power
Nominal Vcc Test
Mode Name Output Vcc Range
Gain Point
Range
Gain mode 0 V0 up to 8 22.4 0.75 - 0.88 C806
Gain mode 1 V1 8 to 12 24.4 1.125 - 1.375 C806
Gain mode 3 V2 Not Used Not Used 2 - 2.5 C806
Gain mode 2 Bypass 12 up 28 3-4 C806
Overall gain VO to 8 3.6 to 7.6
bypass +/- 0.5
unit dBm dB VDC N/A
Phoenix Control and Example Values
PA Gain Step PA Vcc
Spec
Name
GenIO 12 GenIO 13 volt (v)
L L 0.8 V0
H L 1.2 V1
L H 2.2 V2
H H 3.7 Bypass
Page 16 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
PCS PMIC
The following table illustrates the PMIC troubleshooting information.
Setup:
Mode Tx Rx Band
Local On On PCS/CELL
Measurements:
Depends
Pin Label Test Point Units Comment
on
1 EP Pin 1 1.8 UPP IC enable = GenIO 10
2 M0 Pin 2 1.8 UPP Control 0 = GenIO 12
3 M1 Pin 3 1.8 UPP Control 1 = GenIO 13
4 NC NC NC NC NC
5 FB Pin 5 0.75 - 4 M0, M1 See PA worksheet. Output to fly-
back inductor
6 FB Pin 6 0.75 - 4 M0, M1 Shares PWB pad with pin 5
7 BYPVout bottom 0.75 - 4 M0, M1 PMIC bypass output used at Pout
C808 > 12 dBm
8 VDD right VBATT VBATT Digital DC supply, shared with
L810 pin 12, 14, 15
9 VSS GND GND GND Digital GND, shared gnd with pin
13
10 NC NC NC NC NC
11 Vbgap NC NC NC Bandgap voltage output
12 VDD right VBATT VBATT Digital DC supply
L810
13 Vss GND GND GND Digital GND, shared gnd with pin
9
14 Vsw right VBATT VBATT Switcher supply
L810
15 Vsw right VBATT VBATT Switcher supply
L810
16 Gsw GND GND GND Switcher GND, does not share
with pin 9 and pin 13
Issue 1 06/2003 Nokia Corporation Confidential Page 17
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Troubleshooting - RF CCS Technical Documentation
Good phone PMIC
Resistances
Pin Resistance
1 60k
2 75k
3 80k
4 1.59M
5 1.6M
6 2M
7 2M
8 2M
9 0.1
10 100
11 115k
12 60k
13 0.2
14 1.3M
15 1.18M
16 0.1
PCS IF and RF AGC and PA Control
The following table illustrates the PDM values and their typical values for the IF AGC, RF
AGC Jedi Pout, Gain steps, and the PA VCC levels. It also shows the typical power output
at the RF connector.
Page 18 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
PCS CDMA Chnn 600
PA Gain
TX RF AGC TX IF AGC Jedi Po PA Vcc
Step
Con
Typi Typi Typi Typi n RF
Gen Gen
cal Test cal Test cal Test cal Test PA Pout
PDM PDM IO IO
Valu Point Valu Point Valu Point Valu Point Gain
12 13
e e e e
-133 0.71 Bottom -133 0.71 Top -17 right H H 3.55 C806 DM 23
C606 C605 L605
-96 0.77 -96 0.77 -19 H H 3.65 30 20
-52 0.83 -52 0.83 -25 H H 3.65 30 16.3
-52 0.83 -52 0.83 -25 H L 1.2 26 12
-31 0.86 -31 0.86 -28 H L 1.2 26 10.3
-31 0.86 -31 0.86 -28 L L 0.81 25 8
39 0.98 39 0.98 -36 L L 0.81 25 0
91 1.07 91 1.07 -46 L L 0.82 25 -10
159 1.18 159 1.18 -58 L L 0.82 27 -20
244 1.32 244 1.32 -69 L L 0.82 25 -30
331 1.46 331 1.46 -80 L L 0.82 25 -40
418 1.6 418 1.6 -89 L L 0.82 25 -50
PCS Power Detector
The following tables illustrate the measurements required for troubleshooting the PCS
power detector.
Setup:
Mode Tx Rx Band Chnn Rho
Local On On PCS/CELL 600/384 On
Input Tx Freq Rx Freq
384 836.52 881.52
600 1880 1960
Issue 1 06/2003 Nokia Corporation Confidential Page 19
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Troubleshooting - RF CCS Technical Documentation
PCS, Chnn 600
PA Gain
TX AGC Power Detector Comments
Step
Pout at
Conn Detector **Det =
GIO GIO Det
RF/IF pdm RF Test Point Test Point mA Detector
12 13 Out
Pout Po = Power
418 L L -50 -87 right R814 2 left C807 250 PCS band
detector cou-
pling is about
30 dB
201 L L -25 -68 right R814 2 left C807 250
39 L L 0 -41.5 right R814 2 left C807 255 RF amplifier
has the most
gain increase
near 0 dBm
-30 L L 8 -33 right R814 1.986 left C807 263
-30 H L 10.2 -31 right R814 1.984 left C807 278
-51 H L 12 -29 right R814 1.979 left C807 285
-72 H H 18 -21.5 right R814 1.93 left C807 473
-85 H H 19 -21 right R814 1.914 left C807 500
-108 H H 21 -19 right R814 1.882 left C807 557
-133 H H 23 -17 right R814 1.84 left C807 634
-148 H H 24 -16.5 right R814 1.81 left C807 685
-162 H H 25 -16 right R814 1.778 left C807 740
Detector Reference and DC Supply
Label Test Point Typical Value
Det Ref left C803 2
Det Supply bottom C257 2.8
VDC
Page 20 Nokia Corporation Confidential Issue 1 06/2003
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CCS Technical Documentation Troubleshooting - RF
Receiver Troubleshooting
Cell Receiver
Receiver Path (Cell mode)
Setup:
Input power -50 dBm
Input Freq 881.52 MHz
Rx AGC PDM 225 PDM
CDMA Generator Code Domain Setup
Walsh
Channel Power
code
Pilot -7 dB 0
Paging -12 dB 1
Traffic -15.6 dB 10
Sync -16 dB 32
Measurements
Typical
Step Part Part Ref Label Test Point Units Comments
Value
1 Diplexer none RF Conn Diplexer *-73 dBm/30kHz
Pin 3
2 Alfred Pin 11 CELL LNA Alfred Pin -68 dBm/30kHz expected LNA gain
input 11 = 12 to 14 dB
3 Alfred Pin 13 CELL LNA bottom -59 dBm/30kHz Yoda register 6.
output L901 Defaults to high
gain mode
4 Alfred Pin 16 CELL Mixer Alfred Pin -53 dBm/30kHz Note that this is a
input 16 passive device but
impedances cause
power level to
appear higher
5 Alfred Pin 17 Mixer out- right L903 -54 dBm/30kHz Mixer is passive
put (183.6 and typical con-
MHz) version gain is -5
dB
Issue 1 06/2003 Nokia Corporation Confidential Page 21
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Troubleshooting - RF CCS Technical Documentation
Measurements
Typical
Step Part Part Ref Label Test Point Units Comments
Value
6 Alfred Pin 18 IF Amp right C906 -56 dBm/30kHz
input
7 Alfred Pin 22 IF output left L909 -33 dBm/30kHz IF amp gain typi-
(565 ohms) cally 15 to 19
8 Z701 Pin 5 IF filter top L702 -42 dBm/30kHz impedance change
input creates -10 dB
delta
9 Yoda Pin 31 VGA input right C702 -56 dBm/30kHz see TS picts 2, doc
1 #2
10 Yoda Pin 32 VGA input right C707 -56 dBm/30kHz both look same
2 and look distorted
11 Yoda Pin 8 Qb out J704 0 to 0.6, VAC, VDC see TS picts 2.doc
1.3 #3,4,5 SA view of
BB I or Q
12 Yoda Pin 7 Q out J703 0 to 0.6, VAC, VDC see TS picts 2.doc
1.3 #3,4,5 SA view of
BB I or Q
13 Yoda Pin 8 lb out J702 0 to 0.6, VAC, VDC see TS picts 2.doc
1.3 #3,4,5 SA view of
BB I or Q
14 Yoda Pin 9 1 out J701 0 to 0.6, VAC, VDC see TS picts 2.doc
1.3 #3,4,5 SA view of
BB I or Q
Alfred (Cell mode)
Constant Reference Values:
CELL Iscillator and IF
VHF Tx Lo Tx IF
457.2 228.6
VHF RX Lo Rx IF
367.2 183.6
Setup
CW or Default LNA Gain
Mode Tx Rx Band Pin
CDMA PDM Mode
Local Off On PCS/CELL CW -80 dBm RX IF AGC High
=0
Page 22 Nokia Corporation Confidential Issue 1 06/2003
RH-3
CCS Technical Documentation Troubleshooting - RF
Setup
CW or Default LNA Gain
Mode Tx Rx Band Pin
CDMA PDM Mode
Input Chnn Tx Freq Rx Freq UHF
384 836.52 881.52 1065.12
600 1880 1960 2143.6
Measurements
CELL PCS
Depends
Pin Label Test Point Typical Typical Units Comments
on
Value Value
1 LO_VDD_P bottom 2.63, 13.4, 2.48, -15.6, VDC, dBm, VR4, band Only an inductor
L908 1065.12 2143.6 MHz separates pin 1
and 2
2 LO_VDD_C top L908 2.3, -15, 2.45, 11, VDC, dBm, VR4, band measured is off-
1065.12 2143.6 MHz set by the LO
power
3 BAND left C911 Q 2.63 VDC Yoda
4 P_MIX_IN left L911 NA -72, 1960 dBm, MHz band PCS band
5 P_RFA_VD top R910 2.7 2.7 VDC VR4 PCA band
D
6 GND NA NA NA NA NA
7 GAIN_CTL left C909 2.7 2.7 VDC Yoda LNA gain switch
8 P_LNA_OU bottom NA -69, 1960 dBm, MHz band PCS band
T C902
9 GND NA NA NA NA NA
10 P_LNA_IN Pin 10 NA -83, 1960 dBm band PCS band
11 C_LNA_IN Pin 11 -80, NA dBm, MHz band CELL band
881.52
12 GND NA NA NA NA NA
13 C_LNA_OU bottom -69, NA dBm, MHz band CELL band
T L901 881.52
14 VDD top R910 2.7 2.7 VDC VR4 closer MPs are
blocked by shield
15 RFA_VDD_ top R910 2.7 2.7 VDC VR4 same as pin 5
C
16 C_MIX_IN Pin 16 -75, NA dBm, MHz band CELL band
881.52
Issue 1 06/2003 Nokia Corporation Confidential Page 23
RH-3
Troubleshooting - RF CCS Technical Documentation
Measurements
CELL PCS
Depends
Pin Label Test Point Typical Typical Units Comments
on
Value Value
17 MIX_OUT right L903 -66, 183.6 -67, 183.6 dBm, MHz UHF LO UHF = 1055.12
(CELL), 2143.6
(PCS)
18 IFA_IN right C905 -63, 183.6 -65, 183.6 dBm, MHz
19 IFA_SRC right L910 -63, 183.6 -65, 183.6 dBm, MHz
20 AMPS_OUT NC NC NC NC NC No AMPS in this
application
21 GND NA NA NA NA NA
22 CDMA_OU left L909 -42, 183.6 -44 dBm, MHz Alfred provides
T about 40 dBm of
overall
23 IF_SEL Pin 23 0 0 VDC Always gnded for
this frequency
plan
24 LQ_IN top L 904 1, 1065.12 2.4, 2143.6 dBm, MHz UHF LO
Yoda (Cell mode)
Constant Reference Values
Cell Oscillator and IF
VHF Tx Lo Tx IF
457.2 228.6
VHF Rx Lo Rx IF
367.2 183.6
Setup
CW or Default LNA Gain
Mode Tx Rx Band Pin
CDMA PDM Mode
Local Off On PCS/CELL CW -80dBm RX IF AGC High
=0
Input Chnn Tx Freq Rx Freq UHF
384 836.52 881.52 1065.12
600 1880 1960 2143.6
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