User Guide

Nokia Customer Care RF Description and Troubleshooting

6235/6235i/6236i (RM-60)

Tx UHF LO (N7000) Troubleshooting

There are two fixed LOs, 3296.16~3395.88MHz for cell band and 3700~3819.90MHz for

PCS band. This is the only LO for up-conversion. Be sure to monitor the control voltage at

R7001. When the N7000 LO is locked, this control voltage should be between 1.2 and

1.8Vdc.

Figure 57: Tx UHF LO layout and test points

Typical Transmitter UHF LO Spectrum Outputs

Figure 58: Transmitter UHF LO (3296.16~3395.88)/4 MHz Output for Cell

Keys observations:

- the following Ref Spurs

- 30kHz offset –65dBc