Nokia 9110 サービスマニュアル
PAMS
Technical Documentation
RAE–2
Baseband
Page 2– 5
Original 02/99
Introduction
This document contains the specification to the Baseband section of the
BS8 module. The BS8 module carries out almost all CMT functions of
RAE–2. BS8 can be divided into two functional sections; BaseBand (BB)
and RF. Some of CMT baseband circuits are implemented to both BS1
and BS2 modules.
BS8 module. The BS8 module carries out almost all CMT functions of
RAE–2. BS8 can be divided into two functional sections; BaseBand (BB)
and RF. Some of CMT baseband circuits are implemented to both BS1
and BS2 modules.
The Baseband module BS8 comprises four ASICs (CHAPS, CCONT,
COBBA–GJ and MAD2) that perform the baseband functions of the mod-
ule.
COBBA–GJ and MAD2) that perform the baseband functions of the mod-
ule.
Figure 1.
BS8 BaseBand block in RAE–2 product
MAD
CHAPS
COBBA
BATTERY
PA SUPPLY
RF SUPPLIES
VBB
TX/RX
VBATT
+
Memories
VCOBBA
13MHz
BS1
BS2
earphone
HF
MIC
Charger IF
Ext. audio
IF
IF
MBUS
CCONT
SIMCONN
CMT
UI
UI
MMC IF
MMC
CONN
CONN
SCOTTY
CMT–PDA IF
BOTTOM CONNECTOR
BA
TT
.CONN
VREF
MAD
CMTUI IF
Flash
512k
Sram
256k
Eeprom
8k
BS8
TXC RXC
AFC
VCOPWR
VCTCXO
Synthesizer
control
RF
BB
LNA
32kHz
TXPa
LIM
VCHARG
VSIM
Technical Summary
The BS8 module is implemented on a single double side 8–layer printed
circuit board. The main part of the baseband area is located on the bot-
tom side of the PCB and only some components (bottom connector, bat-
tery connector and some filter components) are placed on the upper side
(RF side). Component height space on the baseband is 2.0mm.
circuit board. The main part of the baseband area is located on the bot-
tom side of the PCB and only some components (bottom connector, bat-
tery connector and some filter components) are placed on the upper side
(RF side). Component height space on the baseband is 2.0mm.