Motorola Confidential Proprietary
General Description
Service Manual
71
Figure 40. RF Block Diagram
Σ
19.44Mhz
Ref. OSC.
FM Mod.
BPF: 869 - 894Mhz
BPF: 1930 - 1990Mhz
Crystal Filter
112.32Mhz
Offset
V
CO
RF
Detector
RX_ I
RX_Q
VAGIN
TX_I
TX_IX
TX_Q
TX_QX
MERLIN_TX
A
GC
AOC_CNT
ZIFSYN_VREF
RX_2.75V
ZIFSYN_EN
RF_CLK
RF_DATA
5V
CELL_TX: 824 - 849Mhz
PCS_TX: 1850 - 1910Mhz
ZIF IC
FRACTIONAL-N
SYNTHESIZER
LVPADC
CLKIN
FMOUT
Φ
I_O
UT
Q_OUT
AGC_RSSI
CEX
CLK
DATA
HV_SPLY
TXPRE_IN
VCC
VCA_CNTL
ATTN_CNTL
MODE_A_D
BAND_SEL
OVCO_C
MOD_EN
OUT_BIAS
RF_DET
PCS_PA
CELL_PA
1st Mixer
LNA
LNA
1st Mixer
Retractable Antenna
Cell_
Duplexer
To DCI
To GCAPII
To DCI
X2
RXPRE_IN
Main VCO
Discrete
MC13747
Diplexer
Internal Buffers
TX_SF
A_D
QMOD_KEY
TX_STEP
800
*_
1900
AGC_STEP
To DCI
PCS
_Duplexer
RXPRE_IN
2nd VCO
ZIF
Antenna connector/
switch
Position
Switch
Summary of Contents for T2290
Page 1: ...DIGITAL WIRELESS TELEPHONE Service Manual Level 3 Release 1 TDMA T2290 T2297 ...
Page 26: ... 2000 Motorola Inc TDMA T2290 T2297 Cellular Overview 16 ...
Page 40: ...Motorola Confidential Proprietary TDMA T2290 T2297 TDMA Test Mode NAM Programming 30 ...
Page 68: ...Disassembly TDMA T2290 T2297 Keypad Removal Motorola Confidential Proprietary 58 ...