User Guide
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Page 6-28 ãNokia Corporation. Original
RF in general
The RF part of this product is a Dualband Direct Conversion transceiver (Also used in
6210, 8210, 8850, 8310, and other). In Direct Conversion no intermediate frequencies are
used for up- or downconversion. The VCO is set to either twice or four times (depending
on the band used) the wanted RX or TX Frequency. The VCO frequency is divided by either
2 or 4 and fed to the mixers (down-conversion) or modulators (up-conversion). Up- or
down-conversion is done in one step, directly between RF frequency and DC. All up and
down-conversion takes place in the RF IC named Hagar (N600). Hagar also contains PLL
and a DC control section used to power and/or control LNAs, TX buffers, Detector and RX/
TX Switch. Hagar is controlled via a serial bus (CTRL).
The RF supports HSCSD (High Speed Circuit Switched Data) and GPRS (General Packed
Radio Service), meaning multislot operation, this will not require special equipment or
procedures in repair situations.
64/65
NDIV
ADIV
j
charge
pump
RDIV
CTRL
SDATA
SCLK
SLE
1/4
1/2
2
OSC_IN
OUT_CP
2
2
2
2
1/2
1/4
2
2
44
44
TXI_0/TXI_180
DET
loop
filter
VCO
AFC
26MHz
INP_P_RX
INM_P_RX
Ant Switch
RX
RX
TX
TX
INP_G_RX
INM_G_RX
OUTP_P_TX/
OUTM_P_TX
OUTP_G_TX/
OUTM_G_TX
DNC2
DNC2
RX Filter
Calibration
2
2 2
2
TXQ_0/TXQ_180
LNAB_G
2
2
RXQ
RXI
OUT_BB1_I
OUT_BB1_Q
I_DCN2_I
I_DCN2_Q
C1_BB1_I
C2_BB1_I
C2_BB1_Q
C1_BB1_Q
Cp_f_I
Cm_f_I
Cp_f_Q
Cm_f_Q
Cp_dtos_I
Cm_dtos_I
Cp_dtos_Q
Cm_dtos_Q
LOIS RF Block Diagram
Last edit 10:39 06-08-01
C:\USERS\HCS\HDb13\Troubleshooting\pics\Blocks\HDb13_block_010806.vsd
Open collector
Open collector
0-40dB
BB_Gain
0-40dB
BB_Gain
DtoS
DtoS
BIQUAD
BIQUAD
GSM
PCN
VRF_RX
VBATTRF
VDIG
VPRE
VCP/GND_CP
2
VLO
Reset
RF TEMP
SENSOR
RFTEMP
PWC
DET
TXP
TXC
Vpctrl_g
Vpctrl_p
INP_LO/INM_LO
GNDRF_TX
VBB
VREF_RX
VB_EXT
RB_EXT
RF
Controls
VBD
LNAB_P
V_ANT_1/
V_ANT_2
2
VR3
8 / 18 dB
8 / 18 dB
1/2
TOUT
0dB
DUAL
SAW
SAW
SAW
LNA
LNA
PA
Dir. Coupler
Hagar
VR4
VR7
VREFRF01
RXI
RXQ
VR4
AFC
RESET
RFBUSEN1
RFBUSCLK
RFBUSDA
TXC
TXP
VBATTRF
TXIOUTP/TXIOUTN
2
2
HGR_TEMP
VR2
VCP
GND_BB / GNDRF_RX / GND_LO / GND_PRE /
GND_CP / GND_DIG / GND_RX
VF_RX
2dB
2
VTX_B_P
VTX_B_G
Antenna connector
TXQOUTP/TXQOUTN
VTXLO_G
LNA_G
LNA_P
VREFRF02
RFCLK_I
LPRFCLK_I
SAW
BALUN