Service Manual

MM-E 2072-09333-00
Audio and Data Sources
SPKR
MIC
Digital SSB
Modulator
(DSM)
Codec
D/A Section
Audio Receive
Circuits
Audio
Amplifier
Divider
by 39
16.8 MHz
Reference
Power
Amplifier
Harmonic
Filter
Amplifier
Audio and Data Outputs
16.8 MHz
to DSP
16.8 MHz
Reference
Frequency
Local Oscillator 1
45.2 to 75.1 MHz
Local Oscillator 2
44.05 to 46.15 MHz
Local Oscillator 3
430.77 kHz
TX
Amplifier
Codec
RX
Amplifier
Synthesizer 1
16.8 MHz
Reference
Frequency
TX/RX
Switch
Preselector and
Receiver Front End
Processor
Frequency
Control Data
First IF (45.1 MHz)
Processor
Second
Mixer
Receiver Second IF
(450 kHz)
Processor
Switching
Regulator
SW_BATT
ON/OFF
Switch
and
Protection
Synthesizer 2
Receiver Third IF
(20 kHz)
Processor
16.8 MHz
to PLLs
DSP
Subsystem
First
Mixer
ATU DC
Switch
Regulated
Voltages
Exciter
Amplifier
Third
Mixer
ISB Option
Codec
A/D Section
CONTROL HEAD
MIC
MIC PTT
Control and
Status LInes
Microcontroller
SW_BATT
Body Assembly
Control Head Assembly
ANT
+
_
VDC IN
HI POWER
ACCESSORY
To
LORD
TX_AUDIO_ISB
RX_AUDIO_ISB
Serial Control Channel
GPS
Receiver
Calibration
Data
Frequency
Control Data
GPS
Serial Control Channel
RS-485
Transceiver
Supply
Voltage
Control
PTT and
MIC Buffers
MIC PTT
INTERCONNECTION
RS-485
Transceiver
Interconnection
Cable
Local
Regulators
Lighting and
Heating Control
Front Panel
ON_OFF_CONT
Audio Connector
PTT and
MIC Buffers
To External
Speaker
1.05 MHz
Power
Control
Voice PTT
Data PTT
CW PTT
Power
Sensor
ALC
VFWD
VREV
Temperature
Local
Regulators
Backup
Battery
Analog
Indications
Main
Microcomputer
Subsystem
Regulated
Voltages
SD Socket
Figure 2-10. Micom-Z Trunk-Mount Version, Functional Block Diagram
2-13/2-14