Step 3. Rx Chain Checking; Fig 22 Uhf Vco; Fig 23 Rf Controls - Nokia RH-13 Series Troubleshooting Manual

RH-13
Troubleshooting
8 Connect spectrum analyzer probe to the UHF VCO output and record signal level
and frequency. Signal level should be around -5 dBm and frequency 2029.2 MHz.
9 Repeat measurement for channels 128 and 251.

Step 3. RX chain checking

1 Set signal generator frequency to 881.46771 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)
Page 40
Figure 22: UHF VCO.
Output
G802
Figure 23: RF controls
ãNokia Corporation
CCS Technical Documentation
Issue 1 11/02