Hytera MD78X - Page 381

Q805
PreDriver
Attenuator
Q802 Q803
Finalstage
Microstrip
Matcher
Q804
Driver
Q111
Firststage
Tx/Rx
Switch
Harmonic
Filter
Microstrip Dual
Directional Coupler
ANT
Rx_PORT
Tx_PORT
9V1A_TX
B+
B+
Forward
Detector
Reflect
Detector
Alarm to ADC
VSWR Protection
TV_APC
Temperature
compensation
High
Temperature
Protection
OMAP
Match
Match
Match
TXC
Final_Bias
X302
TCXO
I/Q singal
Voltage
Detec
Switch’s Power
9.1V
ADC
U302
BB IC
U100
PLL IC
TX_VCO_L
L P F
RX_VCO_L
TX_VCO_H
RX_VCO_H
X100
VCTCXO
U105
U101
SW
U102
SW
MOD H
CLK
STB
DATA
LD
Fast Lock SW
Fast Lock SW
U500
TX:935-941MHz;
Rx:924.35-943.35MHz
VCO_Feed
back LPF
S P I
M C S I
4V3A
4V3A
4V3A
4V3A
5VA&3V3D
5V&3V3A
Attenuator
TX:896-902MHz;
TX:851-870MHz;
Rx:861.65-867.65MHz
TX:806-825MHz;
BPF
806-941MHz
Q107
BPF
806-941MHz
Q109
U6107
Switch
MOD L
SAW Filter 938MHz
SAW Filter 862MHz
Low Noise Amp
Q6102
SAW Filter 938MHz
SAW Filter 862MHz
Mixer
U403
LPF
1 2
Attenuator
1 2
Q6103
IF Filter
Z6100
IF Amp
Q6104
Q6105
U701
IF IC
IF Processor
BW_SW
BW_SW-1
58
MD78X/MD78XG Block Diagram (RF Section)