User Guide

2118 (RH-77)
RF Description and Troubleshooting Nokia Customer Care
Page 20 ©2005 Nokia Corporation Company Confidential Issue 01 04/2005
Figure 12: RF Main Mode dialog box for Rx IF troubleshooting
5. Click Set.
Note: Be sure that the “RF Main Mode set successfully” message appears in
the status bar.
6. Use a spectrum analyzer to test TP3 (I+,I-, Q+, Q-). Set the S.A to 300 KHz center
frequency, 200 KHz SPAN, and +10 dBm reference level. The spectrum analyzer
should read –8 dBm without any settings to the PDM.
7. Use Table 12 to configure the CDMA generator code domain.
Table 13 shows the steps for Rx IF troubleshooting. See Figure 13 on page 22 for an
illustration of the corresponding test points.
Table 12: CDMA Generator Code Domain Setup
Channel Power Walsh Code
Pilot -7dB 0
Paging -12dB 1
Traffic -15.6dB 10
Sync -16dB 32
Table 13: Rx IF Troubleshooting
Step # Part Function
Typical
Value/
Frequency
HP85024A
Typical
Value
Frequency
Prod Probe
Comments
TP1 L702R IF-IN +1.3 dBm/
183.6MHz
-12/-27 dBm
183.6 MHz
I.F Input to Z701 (I.F filter).
NOT 50 ohm
TP2 L701L/R SAW Out -16 dBm/
183.6MHz
-35/-50 dBm
183.6 MHz
Differential outputs of Z701.
NOT 50 ohm