Uhf Synthesizer Test Points - Nokia 3155 Rf Description And Troubleshooting

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UHF Synthesizer Test Points

7
Table 15 shows the description for each component in
Test
Description
Point
1 BAND_SEL_VCO
2 PCS_CEL-LO return to UHF PLL
3 PCS_CEL_LO input to the N7160
4 Lock voltage
5 VR4
6 VR1A
7 VPLL
ISSUE 1 07/2005
1
4
5
6
Figure 45: UHF synthesizer layout
Table 15: UHF Synthesizer Layout Components
©2005 Nokia Corporation
3155/3155i (RM-41), 3152 (RM-61)
RF Description and Troubleshooting
N7100
2
3
Figure
Value
Cell = 0Vdc
PCS = 2.8Vdc
Cell: -11dBm
PCS: -18dBm
Cell channel 384: 1009.62MHz > -0dBm
PCS channel 600: 2088.1MHz > -0dBm
DC between 0.8 and 3.4V, S/B 1.2V at the
center frequency
2.8V
4.8V
2.8V
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