Descriptions Of Selected Components, Signaling, And Architecture; Robin (N601) Key Features; Robin (N601) Signaling - Nokia NPD-4 Series Technical Documentation Manual

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CCS Technical Documentation

Figure 18: Block Diagram for both Cumulus (Cell PA) and Nimbus (PCS PA)

APPENDIX D:

Descriptions of selected components, signaling, and

architecture

- Transmitter chip: both Cell & PCS

- Supports IS95, IS2000 & AMPS

- Input is baseband IQ signal, output is RF signal. Contains IF circuitry

- 84 ball TFBGA

- has 2 upconverters (BB to IF IQ modulator, IF to RF)

- contains on-chip VHF LO

- contains RF and IF Variable Gain Amplifiers, and part of circuitry for PA gain control

- contains op-amp as part of power detection circuit

- has serial interface for control by external digital controller

- 2.7v and 4.7v for analog functions, 1.8v for digital functions

-PCS_CTRL: 1=channels 25-599, 0=channels 600-1175. Output of Robin to Hornet

-PD_Cell & PD_PCS:. Robin output to Tomcat and Hornet, powers down those chips.

0=off, 1=on

- FALSE_DET: Used by UEM to monitor VR2 to ensure it is low when it should be (i.e.,

phone not transmitting when it's not supposed to be)

- TX_GATE: used to turn on various blocks. Used with puncturing, and to turn on power

down circuits. Input to Robin.

- VREFRF02: Robin input, voltage reference from UEM. Should be 1.35v

- FILSEL1 and FILSEL2: control lines which enable Robin to control the switch N605.

Issue 1 02/2003

Nokia Corporation

Troubleshooting — RF

Confidential

NPD-4

Page 57

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Troubleshooting