Path Of The Received Signal; Fig 14 Receiver Block Diagram - Nokia RH-13 Series Troubleshooting Manual

RH-13
Troubleshooting

Path of the received signal

Block level description of the receiver:
1930 ... 1990 MHz
Duplex filter
1900 MHz
LNA
1900
Band
filter
st
1
mixer
133.2 MHz
GSM
200 kHz
ch filter
BW
AGC
nd
2
mixer
Buffer
BB filter
AGC
Page 30
Figure 14: Receiver block diagram
Diplex filter
850 / 1900
134.04 MHz
30 kHz
BW
Q
Q
ãNokia Corporation
CCS Technical Documentation
869 ... 894 MHz
Duplex filter
850 MHz
LNA
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
AGC 25/20 dB 1 step
2063.4 ... 2124 MHz
UHF
LO
1002.4...1028.01MHz
(VCO / 2)
AGC 1...31 dB, 5 steps
133.2 MHz (VCO / 2)
VHF
LO
134.04 MHz (VCO / 2)
Issue 1 11/02