NSB-5
System Module
Flash Programming ................................................................................................... 47
IBI Accessories ......................................................................................................... 48
Phone Power-on by IBI ......................................................................................... 48
IBI power-on by phone.......................................................................................... 49
RF Module .................................................................................................................. 50
RF Frequency Plan ................................................................................................... 50
DC Characteristics ................................................................................................... 50
Control Signals ...................................................................................................... 53
Functional Description ............................................................................................. 54
RF Block Diagram .................................................................................................... 54
Receiver .................................................................................................................... 55
Transmitter ................................................................................................................ 56
Power Detection Circuit ........................................................................................... 57
Frequency Synthesizers ............................................................................................ 60
AGC .......................................................................................................................... 61
AFC ........................................................................................................................... 62
Software Compensations .......................................................................................... 62
Modulator Output Level ........................................................................................... 62
RSSI .......................................................................................................................... 62
TX power range ........................................................................................................ 62
PA select function ..................................................................................................... 63
RF Block Specifications ............................................................................................ 63
GSM1900 Duplex Filter ........................................................................................... 64
Receiver Blocks ......................................................................................................... 65
LNA in CRFU_2a ..................................................................................................... 65
First IF Filter.............................................................................................................. 67
Second IF Filter ........................................................................................................ 68
Third IF Filter ........................................................................................................... 70
Transmitter Block ..................................................................................................... 70
GSM1900 TX SAW Filter ........................................................................................ 73
TX Buffer ............................................................................................................... 73
Power Amplifier MMIC ............................................................................................74
Directional Coupler ................................................................................................ 76
Power Detector ......................................................................................................... 76
Synthesizer Blocks .................................................................................................... 77
Page 4
Nokia Mobile Phones Ltd.
PAMS Technical Documentation
Issue 1 03/01