User Guide

PAMS Technical Documentation Rf Troubleshooting
NPE-3
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Apply -80dBm
946.267MHz signal from
generator to antenna
connector
Oscilloscope at RXI
Signal 950mVpp
DC offset 1,1V
Frequency 67,7kHz
EGSM chain functional
Oscilloscope
VRX 2.7V
Check Hagar serial
interface
Yes
Yes
Yes
Spectrumanalyzer
V700, RFout
-73dBm
No No
Spectrumanalyzer
1st EGSM SAW
out
-85dBm
GSM_RX
-84dBm
No
Spectrumanalyzer
T700, unbal
-75dBm
Check
C722, Z703, R702
No
Yes
Check Hagar
N500
Yes
Check BBNo
Oscilloscope
LNA_G 2.4-2.8V
LNAB_G 0V
Yes
Check RX/TX
Switch
Z900
No
Check Z700
Yes
EGSM Fault tree
No
Oscilloscope
V700, RFout 2.1-2.2V
V700, RFin 0.8-0.9V
Yes
Oscilloscope
VRX 2.7V
Check Hagar serial interface
Check Hagar
N500
Yes
Check BaseBandNo
Check
R706, R708,
V700,C701,C705,
C718
No
Check
V700
Yes
Change generator
level to -55dBm
Yes
2
2
2
2
INP_P_RX
INM_P_RX
RX/TX Switch
RX
RX
TX
TX
INP_G_RX
INM_G_RX
DNC2
DNC2
LNA_P
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
0-40dB
BB_Gain
0-40dB
BB_Gain
DtoS
DtoS
BIQUAD
BIQUAD
GSM
PCN
VRF_RX
VREF_RX
VB_EXT RB_EXT
RF
Controls
LNA_G
8 / 18 dB
8 / 18 dB
SAW
SAW
SAW
SAW
LNA
LNA
Hagar
VRF_RX
VREF_RX
VREF
RXI
RXQ
LNAB_G
Antenna connector