Uhf Synthesizer Test Points - Nokia 2255 Manual
Rm-97, rf description and troubleshooting
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Also See for 2255:
- User manual (54 pages) ,
- Baseband description and troubleshooting (44 pages) ,
- Disassembly/assembly (14 pages)
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UHF Synthesizer Test Points
Figure 36 shows the UHF Synthesizer layout.
1
19.2MHz VCTCXO
UHF VCO
Loop filter
Lock voltage probe point:
components
DC between 1 and 2 V
ISSUE 1 10/2005
LO coupler
Figure 36: UHF Synthesizer test points
©2005 Nokia Corporation
RF Description and Troubleshooting
7
N7000 LO/PLL Input
RF test point, Tx LO output levels:
Match Components
CELL CH 384: 1065.12MHz @ –17dBm
With production probe
-26dBm w/HP probe (20dB pad)
Company Confidential
2255 (RM-97)
Page 39
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Troubleshooting
