Nokia 9000i - Page 77

After Sales
Technical Documentation
RAE/RAK–1N
RF
Page 3– 11
Amendment 1 04/97
step AGC
PCN
UHF VCO
PLL
VHF VCO
VCXO
clipped sinewave
f
f/2
f
f/2
CRFRT
f
f/2
BIAS
–4 V
+6 V
TXC
+6 V
CRFCONT
+4.5V
TXP
Batt.volt.
TXC TXP
TXIP TXIN TXQP TXQN
TX power control
90 deg
Figure 4. RF Functional Block diagram
PCN
PCN
TXP (GSM)
PCN
AFC RFC
RXI RXQ
GSM: 25 – 30 dB PCN: 21 – 27 dB
PCN