Motorola V200 Service Manual page 18

Circuit Description
FROM CALL
PROCESSOR IC
FE_G1
FE_G2
MODE
BAND
ANTENNA
FL50
RF
DET
FL51
ACCESSORY
FROM
B+
AUDIO/POWER
CONTROLLER IC
Figure 5. V200 transceiver block diagram
14
is output from U700 to call processor IC U1100 via signals RXIP, RXIM, RXQP,
and RXQM.
FL100
FL30
PLNAOUT PMIXIN
PCS MIXERS
CLNAOUT
PLNAIN
CLNAIN
U9917
FM MIXER
FRONT
END IC
LOIN800
U9917
FRONT END
LOIN1900 IC
U625
U635
TX_LO_CELL
(ME IC)
TX_LO_PCS
PA_BIAS
FROM CALL
SAW FILTER
U9991
PROCESSOR IC
U500
FL401
PCS
PCS
MODE
CELLULAR
CELLULAR
FL404
U501
SAW FILTER
Q1308
PA
drain
TEMP
switch
PAL_B+
SENSOR
PA
drain
RV1TEMP
PAH_B+
switch
Q1307
Transmit CDMA Cellular 800 MHz (PCS 1900 MHz)
TXIP, TXIM, TXQP, and TXQM from call processor IC U1100 modulate the
transmit offset VCO (Q652) signal which is external to, but controlled by, RF
transceiver IC U700. The transmit IF modulated TX_MIX_IN1 signal of 154.8MHz
(TX_MIX_IN2, 189.8 MHz for PCS 1900 MHz) is input to the mixer/exciter (ME) IC
U400 where it is mixed with TX_LO_800, the 979-1004 MHz (TX_LO_PCS, 2039-
2100 MHz for PCS 1900 MHz) local oscillator signal. The transmit signal
EXCITE_OUT_CELL is then passed through bandpass filter FL404
(EXCITE_OUT_PCS, split-band SAW filter FL401 for PCS 1900 MHz) into power
amplifier (PA) U501 (U500 for PCS 1900 MHz). The output of the PA is passed
through isolator U550 (U551 for PCS 1900 MHz), through transmit bandpass mono-
block duplex SAW filter FL51 (bandpass mono-block duplex ceramic filter FL50 for
PCS 1900 MHz) and, finally, through diplexer FL53 to the antenna or RF test port.
REFERENCE
OSCILLATOR
16.8 MHZ
CMIXIN
FL150
CDMA+
PREIN2
CDMA-
PREIN1
FMOUT
RF_SLEEP
FROM CALL
PROCESSOR IC
2ND LO
PCS LO
LO1CP
LOOP
LO1LB2
FILTER
CELL LO
LO1PREIN
ME_VCA
BALUN
(AOCCNT)
TX OUT 1
TX IF
FILTER
MIXER
PA_ENABLE_LO
TX OUT 1X
BAND
U400
MIXER/EXCITER
BALUN
IC
TX_LO_CELL
October 04, 2001
0 Quasi
Up
B/B
2LO PLL
Demod
Mixer
90
AGC/RSSI
U700
RF TRANSCEIVER
IC
Main LO
PLL
0
TX OFFSET
PLL
90
CDMA V200
IF OUT (N/C)
FMHF (N/C)
FROM CALL
PROCESSOR
IC
OFFSET
OSCILLATOR
010996o
6881039B10