User Guide

Nokia Customer Care RF Description and Troubleshooting
6255/6255i/6256/6256i (RM-19)
Issue 2 05/2005 ©2005 Nokia Corporation Company Confidential Page 57
UHF Synthesizer Test Points
Figure 47: UHF synthesizer layout
Table 16 shows the description for each component in Figure 47.
Table 16: UHF Synthesizer Layout Components
Test
Point
Description Value
1 BAND_SEL_VCO Cell = 0Vdc
PCS = 2.8Vdc
2 PCS_CEL-LO return to UHF PLL Cell: -11dBm
PCS: -18dBm
3 PCS_CEL_LO input to the N7160 Cell channel 384: 1009.62MHz > -15dBm
PCS channel 600: 2088.1MHz > -17dBm
4 Lock voltage DC between 0.8 and 3.4V, S/B 1.2V at the
center frequency
5 VR4 2.8V
6VR1A 4.8V
7VPLL 2.8V
2
3
5
4
1
6
7
N7100