Comtech EF Data SDM-300A - Manual (Page 52)

SDM-300A Satellite Modem Revision 6
Functional Description MN/SDM300A.IOM
2–12
INTERFACE
BASEBAND
LOOPBACK
TX
OVERHEAD
TX TERR
RECEIVERS
LINE
P
OVERHEAD
OVERHEAD
ROCESSORS
OVERHEAD
MUX
TX
LOOPBACK
DATA
TXSAT
TX
CLOCK
MUX
SCT
EXT
RECEIVERS DATA
DATA
RXTERR
RX
CLOCK
RXCLK
PLESIOCHRONOUS
BUFFER
PROCESSORS
OVERHEAD
DEMUX
RX
DATA
RXSAT
MUX
SCT
EXT
TXCLK
HI STAB
RX OVERHEAD
BACKWARD
ALARMS
LINE
LINE
DRIVERS
DRIVERS
BWA
FORM C
RELAYS DRIVERS
RELAY
DRIVERS
RELAY
DRIVERS
TTL
FLT
FORM C
RELAYS
MODEM FAULTS
MODEM FAULTS
(FORM C)
(TTL)
MICRO-
CONTROLLER
DROP/INSERT
RS CODEC
Figure 2-4. Interface Block Diagram