Uhf Synthesizer Test Points - Nokia 6255 Rf Description And Troubleshooting

Nokia Customer Care

UHF Synthesizer Test Points

N7100
1
Table 16 shows the description for each component in Figure 47.
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 2 05/2005
4
2
3
Figure 47: UHF synthesizer layout
Table 16: UHF Synthesizer Layout Components
©2005 Nokia Corporation
6255/6255i/6256/6256i (RM-19)
RF Description and Troubleshooting
6
5
Value
Cell = 0Vdc
PCS = 2.8Vdc
Cell: -11dBm
PCS: -18dBm
Cell channel 384: 1009.62MHz > -15dBm
PCS channel 600: 2088.1MHz > -17dBm
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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