Tdma1900, Gsm1900; Fig 36 Tx Signal Path - Nokia RH-13 Series Troubleshooting Manual

RH-13
Troubleshooting

TDMA1900, GSM1900

UEM TX I/Q DA-converters -> I/Q modulator and Digital gain step amplifier (SAFARI) ->
Dual TX IF-BPF -> Up converter (Mixer -> BPF -> Driver) -> BPF -> PA -> Power detector
-> Duplex-filter -> Diplexer -> EXT RF-connector -> Antenna
The power detection and power control circuit belongs under power control part of this
guide.
1900
D
I
P 800
D
E
T
PA
Page 54
Figure 36: TX signal path.
UHF-PLL 2G (÷2)
(2063.4-2124 MHz, HB)
(1003.08-1028.01 MHz,LB)
1900MHz
1900MHz
800MHz
800MHz
U/C
ãNokia Corporation
CCS Technical Documentation
DIV
2
213.2 MHz
214.08 MHz
178.2 MHz
179.04 MHz
Safari GTE
VHF-PLL
356.4 MHz
358.08 MHz
VHF
426.4 MHz
VCO
428.16 MHz
I
Q
Issue 1 11/02