Path Of The Received Signal - Nokia NPM-2NX Troubleshooting Manual

NPM-2NX
Troubleshooting

Path of the received signal

Block level description of the receiver:
1930 ... 1990 MHz
Duplex filter
1900 MHz
133.2 MHz
200 kHz
BW
Receiver Block Diagram
Page 28
Diplex filter
850 / 1900
LNA
1900
Band
filter
st
1
mixer
134.04 MHz
GSM
30 kHz
ch filter
BW
AGC
nd
2
mixer
Q
Buffer
BB filter
AGC
Q
ãNokia Corporation
CCS Technical Documentation
869 ... 894 MHz
Duplex filter
850 MHz
LNA AGC 25/20 dB 1 step
850
Band
filter
st
1
mixer
TDMA
ch filter
AGC
nd
2
mixer
I
Buffer
BB filter
AGC -6...36 dB, 7 steps, TDMA
AGC
AGC -6...30 dB, 5 steps, GSM
I
SAFARI GTE
2063 ... 2124 MHz
UHF
LO
1003...1029MHz
(VCO / 2)
AGC 1...31 dB, 5 steps
133.2 MHz (VCO / 2)
VHF
LO
134.04 MHz (VCO / 2)
Issue 1 07/02