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Block Diagram
Main Control Unit
External
Internal
Connectors
Connectors
Telephone
or Telefax
(TEL. 1)
Telephone
or Telefax
(TEL. 2-5)
Display
Handset
DTE
DTE
(Modem)
(Modem)
PC
Printer
90-276 VAC
47-400 Hz
AC Mains
11-34 VDC
DC
Supply
22
Main Control Board
Telephony Interface
DSP Sub-system
Subscriber
Selection
&
Interface
DSPs
PCM
(Digital Signal
Codec
Processors)
64 kbps
Communication
with Data
Processor.
AUX
Voice PCM and
&
FAX coding.
Frame
Handset
assembly/
Interface
disassembly.
Scrambling/
descrambling.
FEC coding.
Access & Control
Sub-system
Data
Processor
&
Memory
Access & Control.
Buffers
Traffic handling.
&
User equipment
UARTS
handling.
Alarm & Supervision.
Test & Diagnosis.
Tx off
Data
DC/DC Power Board
RF Sub-system
Up-
Combiner/
converter
splitter
&
Transmitter
TX
TX IF
1626.5–
2.5 MHz
1646.5 MHz
Upconverts
TXIF signal to
L-band TX
ASIC
signal.
(Application
Amplifies TX
Specific
signal.
Integrated
Circuit)
Local
Generates
Oscillator
modulated
TXIF
1455–1489 MHz
signal.
Demodulates
RXIF signal.
FEC decoding.
Down-
converter
&
Receiver
RX
RX IF
1530–
12 MHz
1559 MHz
Downconverts
L-band RX
signal.
Amplifies RX
signal.
RF Sub-
system
Power
Data
5/10 MHz
ADE supply
+28 VDC
Transmitter/receiver
&
Filters
Antenna Control Modem
+72 V
+38 V
+28 V
Outputs:
± 12V
+7 V
+5 V
GND
D i a g r a m s
D i a g r a m s
D i a g r a m s
Antenna Unit
RF Units
Receiver
Duplexer
Separates RX and TX bands
Transmitter
HPA
LNA
High Power
Low Noise
Amplifier
Amplifier
Combiner/splitter
Combines/separates RF
signals and control signals
Control &
+28
VDC
Monitoring Data
Serial
Voltage
Data
Regulator
Interface
+ 5 VDC
+15 VDC
Data
Processor
HPA output
control.
Power monitor
supervision.
Burst duration
supervision.
Antenna Control Board – ACB
Saturn Bp Portable – Technical Manual
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