Hytera MD78X Service Manual page 489

9V1A_TX
TXC
Gain:15 dB
Gain:16 dB
Gain:-6 dB
Attenuator Match
Match
Q805
Q801
PreDriver
Firststage
TX LO: 3dBm
Q107 Q102
RX LO: 3dBm
Q109 Q111
1 2
Q6103
Attenuator
3dB
IF Amp
U701
Q6104
Z6100
IF IC Q6105
IF Filter
IF Processor
MD78X/MD78XG Block Diagram (RF Section)
B+
Gain:10 dB
Gain:11dB
Microstrip
Match
Matcher
Q804
Driver
Q802 Q803
Finalstage
B+
Final_Bias
Temperature
compensation
TX_L_VCO
TX_VCO_L
Q103
TX_VCO_H
TX_H_VCO Q100
X100
19.2MHZ
C
L P F PLL U100
RX_L_VCO
RX_VCO_L
Q110
RX_VCO_H
RX_H_VCO Q106
C
VCO_Feed
back LPF
LPF
Attenuator
1dB
Band-pass Filter2 Low-Noise Amp
Mixer
D6106
476
High
Temperature
Protection
ADC
ANT
Tx/Rx
Switch
Tx_PORT
Microstrip Dual
Harmonic
Rx_PORT Directional Coupler
Filter
Switch s Power
9.1V
Forward Reflect
Detector Detector
Alarm to ADC
VSWR Protection
TV_APC
MOD H
TV_APC
U500
MOD L Final_Bias
DAC
CLK
STB
DATA
LD
U302 OMAP
X100
19.2MHZ
Attenuator Control
10dB
Band-pass Filter1
Q6102
TV