Nokia 3105 Servicehandbuch
CCS Technical Documentation
Troubleshooting - RF
RH-48
Issue 1 11/2003
© 2003 Nokia Corporation Confidential
Page 31
4 Click the
Set button.
Note: Be sure that the “RF Main Mode set successfully...” message appears in the status bar.
5 Read register templates Jedi(0) bits 10 and 11 for the UHF and Tx VHF lock condi-
tion on the
RF Register R/W dialog box.
Figure 21: RF Register R/W dialog box for synthesizer setup
6 Read register templates Yoda(0) bit 11 for the RX VHF lock condition.
VCTCXO Tuning
The VCTCXO can be manually tuned to verify failed tuned phones, or to verify if a phone
cannot make a call. This can be done with the phone in Local Mode and generating a CW
signal. The frequency accuracy of the VCTCXO can be measured using an HP8960 callbox
in AMPS mode, an HP4406 Tx tester, or a spectrum analyzer (preferably using a lab sys-
tem 10MHz source as equipment reference). Replace the VCTCXO if the VCTCXO AFC DAC
value does not meet the tuning requirements after tuning.
cannot make a call. This can be done with the phone in Local Mode and generating a CW
signal. The frequency accuracy of the VCTCXO can be measured using an HP8960 callbox
in AMPS mode, an HP4406 Tx tester, or a spectrum analyzer (preferably using a lab sys-
tem 10MHz source as equipment reference). Replace the VCTCXO if the VCTCXO AFC DAC
value does not meet the tuning requirements after tuning.