General Instructions For Rx Troubleshooting - Nokia RA-8 Rf Description And Troubleshooting

RA-8
7 - RF Description and Troubleshooting

General instructions for Rx troubleshooting

To start Rx troubleshooting:
1. Connect test jig to a computer with a DAU-9S cable or to a FPS-8 flash prom-
mer with an XCS-4 modular cable.
Make sure that you have PKD-1 dongle connected to the computer's parallel port.
2. Connect a DC power supply to the module test jig with an FLC-2 cable.
3. Set the DC supply voltage to 6 V.
4. Connect an RF cable to the RF connector of the module test jig (MJ-83) and to
RF signal generator.
5. Set the phone module to test jig and start Phoenix service software.
6. Initialize connection to the phone. (Use FBUS driver when using DAU-9S and
COMBOX driver when using FPS-8).
7. From the File menu, choose "Choose Product".
8. From the list, select RA-8.
9. From the toolbar, set operating mode to "Local".
10.From the Testing menu, choose "RF Controls".
11.In the "RF Controls" window:
- Select band "GSM 900", "GSM 1800" or "GSM1900" (Default = "GSM900")
- Set Active unit to "Rx" (Default = "Rx")
- Set Operation mode to "Burst" (Default = "Burst")
For continuous mode:
- Set Operation mode to "Continuous"
- Set AGC to "12: FEG_ON + DTOS_ON + BB_30=Vgain60" (maximum gain set-
ting used in normal mode) (Default = "14: FEG_ON + DTOS_ON +
BB_42=Vgain72")
- Set Rx/Tx channel to 37 on GSM900 band, 700 on GSM1800 band or 661on
GSM1900 (Defaults)
12.Apply
942.46771 MHz (channel 37 + 67.710 kHz offset),
1842.86771 MHz (channel 700 + 67.710 kHz offset) or
1960.06771 MHz (channel 661 + 67.71 kHz) –90 dBm signal
to the RF connector (remember to compensate for cable attenuation).
When measuring with an oscilloscope on "RXI" or "RXQ", you should see the fol-
lowing screens on a working GSM900, GSM1800 or GSM1900 receiver:
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