Step 3. Rx Chain Checking; Fig 33 Rf Controls; Fig 34 Rx I/Q Signal - Nokia RH-13 Series Troubleshooting Manual

CCS Technical Documentation

Step 3. RX chain checking

1 Set signal generator frequency to 1960.06771 MHz and level to -80 dBm.
2 Set phone receiver to continuous mode with full gain using Phoenix.
3 Connect oscilloscope probe to one of the RX I/Q test points on PWB (all four
testpoints J808, J809, J818 and J819 are located behind display)
4 Measure frequency and peak-to-peak voltage of RX I/Q signal from each test
points. Signal should look like in the picture below:
• If only one or two testpoints shows correct signal and rest of the testpoints are
either deaf or signal is very small, the fault is probably due to Safari ASIC.
• If the signal amplitude is correct but its frequency is something else than 67.71
Issue 1 11/02
Figure 33: RF controls.
Figure 34: RX I/Q signal.
ãNokia Corporation
RH-13
Troubleshooting
Page 51