General Instructions For Tx Troubleshooting - Nokia RX-44 Service Manual

RX-44
RF Troubleshooting and Tuning

General instructions for TX troubleshooting

Context
To start TX troubleshooting
Steps
1. Connect the module jig MJ-148 to a computer with a DAU-9S cable or to an FPS-10 flash prommer with an
XCS-4 modular cable and USB cable. Make sure that you have a PK-1 dongle connected to the computer's
parallel port.
2. Connect a DC power supply to the module test jig with an FLC-2 cable.
Note: If CU-4 is used then correct DC supply voltage is 12V . If DC power is connected directly to
module test jig then absolutely max. DC power is 4.2 V.Use nominal value 3.7 V.
3. Connect an RF cable to the RF connector of the PWB board and measurement equipment; or at least a
10dB attenuator, otherwise the PA may be damaged. Use a spectrum analyzer as measurement
equipment.
Note: The maximum input power of a spectrum analyzer is +30dBm. It is recommended to use 10dB
attenuator on the spectrum analyzer input to prevent any damage.
4. Set the phone module to test jig and start Phoenix service software.
5. Initialize connection to the phone. (Use FBUS driver when using DAU-9S.
6. To choose a product in Phoenix: From the File menu, choose "Choose Product" and select RX-44 from the
list or from the File menu, choose "Scan Product".
7. From the toolbar, set operating mode to "Local".
8. From the Testing menu, choose "WLAN TX tests".
9. In the "WLAN TX tests" window:
• Test mode "Continuous TX"
• Data rate "11 MBit/s (Clk)"
• Channel 7 (2.442 GHz)
• Power loop "Calibrated"
• All other items use "defaults"
• Press "Start" button"
• Power level(dBm) "17"
• Press "Set" button
Data rate
1, 2, 5.5 and 11 Mbit/s
6 and 9 Mbit/s
12 and 18 Mbit/s
24 and 36 Mbit/s
48 and 54 Mbit/s
Issue 1
Table 11 Maximum wlan TX power limits for US version
Max. Wlan TX power for US version [dBm]
Channel
1
17
14
14
13
13
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