Hytera MD78X - Page 67

TXC
Attenuator Match Match
Match
B+
B+
Microstrip
Matcher
Alarm to ADC
VSWR Protection
ANT
ADC
Final_Bias
Temperature
compensation
9V1A_TX
U500
DAC
X100
19.2MHz
LPF PLL U100
U302 OMAP
TX_VCO_L
Q103
TX_VCO_H
Q100
RX_VCO_L
Q110
RX_VCO_H
Q106
VCO_Feed
back LPF
Q102
Q107
TX_L_VCO
TX_H_VCO
Q111
RX_L_VCO
RX_H_VCO
Q109
C
C
X100
19.2MHz
U701
IF IC
Q6104
Q6105
Z6100
Q6103
Q6102
Gain:-6dB
Q801
Firstsage
Gain:16dB
Gain:15dB Gain:11dB
Q805
PreDriver
Q804
Driver
Q802ǃQ803
Finalstage
High Temperature
Protection
Tx/Rx
Switch
Tx_PORT
Rx_PORT
Switchÿs Power
9.1V
Harmonic
Filter
Microstrip Dual
Directional Coupler
Forward
Detector
Reflect
Detector
RX
TV_APC
TV_APC
Final_Bias
MCSI
SPI
CLK
STB
DATA
LD
TXLO:3dBm
RXLO:3dBm
Attenuator
3dB
LPF
Attenuator
1dB
1
2
IF Processor
IF Amp
IF Filter Mixer D6106
Band-pass Filter2
Low-Noise Amp
Band-pass Filter1
Attenuator Control
10dB
TV
Gain:10dB
1
2
60
M D 78X /M D 78X G Block D iagram (R F Section)