User Guide

CC Technical Documentation Troubleshooting - RF (Part 2)
RM-11
Issue 1 02/2004 ©2004 Nokia Corporation Confidential Page 11
TX Troubleshooting
Figure 12: RM-11 TX system block diagram
Setup the phone in Local Mode with the appropriate band, channel, RHO on, and PDM
settings. An Agilent call box 8960 is recommended to measure TX power at the RF
connector. The numbers in Figure 13 and Figure 14 indicate the general RF signal flow
and probing locations. More details are given in the following sections.
Transmitter Schematic 1
Figure 13: Transmitter Schematic 1
Cell
Balun
Hi BAND
Lo BAND
VHF PLL
TX_RF_AGC
( UPP )
TX_ IF_AGC
( UPP )
P_DET
PA_AGC
( UPP )
P_REF
VHF SYNTH
I/Q
MOD
BB
Filter
Robin TX Upconverter
Current Mirror
PWROUT
(UEM)
UP CONV
PCS
DVR
CELL
DVR
PCS Driver
Cell Driver
CELL
SAW
Filter
Isolator
WHIP
ANT.
Internal
ANT.
RX
RX
IF AGC
Detector
Div By 2
19.2
MHz
CLK
SIO
DATA
En CLK
CLK
UHF LO
2
2
Q
I
inputs
Filter &
Resonator
PCS
Balun
(UEM)
PCS
Duplexer
Cell
Duplexer
Cell PA
Isolator
PCS PA
Switch
Split Band
Saw Filter
Diplexer
RF Conn
Cell
Balun
Hi BAND
Lo BAND
VHF PLL
TX_RF_AGC
( UPP )
TX_ IF_AGC
( UPP )
P_DET
PA_AGC
( UPP )
P_REF
VHF SYNTH
I/Q
MOD
BB
Filter
Robin TX Upconverter
Current Mirror
PWROUT
(UEM)
UP CONV
PCS
DVR
CELL
DVR
PCS Driver
Cell Driver
CELL
SAW
Filter
Isolator
WHIP
ANT.
Internal
ANT.
RX
RX
IF AGC
Detector
Div By 2
19.2
MHz
CLK
SIO
DATA
En CLK
CLK
UHF LO
2
2
Q
I
inputs
Filter &
Resonator
PCS
Balun
(UEM)
PCS
Duplexer
Cell
Duplexer
Cell PA
Isolator
PCS PA
Switch
Split Band
Saw Filter
Diplexer
RF Conn
11
22
PCS split-band SAW Filter
PCS Driver
PCS switch
Cell Driver
Cell SAW Filter
11
22
PCS Band
Cell Band
Robin TX Up- converter