Service Manual

MM-E 2072-09333-00
Voice PTT
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
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
Frequency
Control Data
First IF (45.1 MHz)
Processor
Second
Mixer
Receiver Second IF
(450 kHz)
Processor
Synthesizer 2
Receiver Third IF
(20 kHz)
Processor
16.8 MHz
to PLLs
DSP
Subsystem
First
Mixer
Third
Mixer
ISB Option
Codec
A/D Section
Local
Regulators
CONTROL HEAD
MIC
MIC PTT
Control and
Status LInes
Microcontroller
SW_BATT
Body Assembly
Front Panel Assembly
ACCESSORY
To
LORD
TX_AUDIO_ISB
RX_AUDIO_ISB
Audio Connector
Data PTT
CW PTT
Serial Control Channel
GPS
Receiver
Main
Microcomputer
Subsystem
Calibration
Data
Frequency
Control Data
Front Panel
GPS
Serial Control Channel
1.05 MHz
MIC PTT
Power
Amplifier
Harmonic
Filter
TX/RX
Switch
Preselector and
Receiver Front End
Processor
ATU DC
Switch
Exciter
Amplifier
ANT
+
_
VDC IN
HI POWER
Power
Control
Power
Sensor
ALC
VFWD
VREV
Temperature
Lighting and
Heating
Control
SW_BATT
ON/OFF
Switch
and
Protection
Regulated
Voltages
Regulated
Voltages
Local
Regulators
Switching
Regulator
Backup
Battery
Analog
Indications
ON_OFF_CONT
SD Socket
Figure 2-3. Micom-Z Dash-Mount Version, Functional Block Diagram
2-5/2-6