Nokia 3105 Servicehandbuch
CCS Technical Documentation
Troubleshooting - RF
RH-48
Issue 1 11/2003
© 2003 Nokia Corporation Confidential
Page 13
Figure 9 shows each testing point for the PA section from the Cell Transmitter Test Path
table on page 10. Always attach a 20dB pad (11881-60001) when probing with an
table on page 10. Always attach a 20dB pad (11881-60001) when probing with an
HP85024A high frequency probe.
Figure 9: (Top) PWB. (Bottom left) A zoomed view of the testing points on the PA section.
(Bottom right) A zoomed view of the PA section with part numbers.
Tx AGC Tuning
Tx power versus IF/RF PDM can be verified against FlaLi specification limits. Make sure
that the PA is set in high gain mode (GenIO bits 10, 13, and 12 are set to H).
that the PA is set in high gain mode (GenIO bits 10, 13, and 12 are set to H).
Tx AGC Tuning
Tx Tuning
AGC Step
Tx AGC
PDM
Value
Target
Power
Low Limit
High Limit
Tx AGC (0)
308
-46
-55
-37
Tx AGC (1)
130
-24
-34
-14
Tx AGC (2)
85
-15
-25
-6
Tx AGC (3)
51
-4.5
-14
5
Tx AGC (4)
19
2.5
-7
12
Tx AGC (5)
-5
6
-3
15