User Guide

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 36 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Table 10 shows the values and description for the VCTCXO test points in Figure 27.
Receiver UHF Synthesizer
The UHF LO frequency varies with the channel. Use the following steps to troubleshoot
the UHF synthesizer using Phoenix.
1. Open the RF menu, and click Frequency Calculator.
Table 10: VCTCXO Test Point Values and Descriptions
Test
Point
Description
1 CLK19M2_UPP to UPP
2 CLK19M2_GPS to GPS module
3 VR3: 2.8 V
4 AFC voltage: DC between 1 and 3 V:
• 1.3 V for PDM 0
• 0.8 V for PDM -1024
• 2.5 V for PDM 1023
5 Oscillator in to UHF PLL
6 F_REF_RX to N7100
7 F_REF_TX to N7000