Figure A-1. D&I With Asynchronous Overhead Block Diagram - Comtech EF Data SDM-300A Installation And Operation Manual

Options
TRANSM IT SECTION
E S T O E S A S Y N C
D S D -A
G .7 03
D S D -B
D R D -A
G .70 3
D R D -B
R EC EIVE
A LA R M
M O N IT O R S
P /O
IN T
L P B K
S AT E L L IT E C LO C K
E X T E R N A L R E F E R E N C E C LO C K
Figure A-1. D&I with Asynchronous Overhead Block Diagram
A–10
B W A LA R M
A L A R M
M O N ITO R
F R A M IN G /T IM IN G
L O G IC
R S -23 2
IN T E R FA C E
T X D E JITT E R
P /O
T E R D AT
T 1 /E 1 B A S E
IN T E R FA C E B A N D
T E R C L K
L P B K
T 1 /E 1
IN T E R FA C E
SECTION
D E S C R A M B LE R
A L A R M S
B W
A L A R M S
D E F R A M E /T IM IN G
(D E M U X )
LO G IC
C LK
IN S E R T
P L E S IO C H R O N O U S
D ATA
B U F F E R
M U X
IN T E R N A L C L O C K
R E C E IV E T E R R C L O C K
A LA R M
M O N IT O R S
S C R A M B LE R
(M U X )
D R O P
M U X
C L O C K
S YN T H E S IS
F O R M C
P R IM A R Y
FO R M C
S E C O N D A R Y
R S -2 32
E S TO E S A S YN C
IN T E R FA C E
P /O
B A S E
T 1 /E 1
B A N D
IN T E R FA C E
L P B K
T 1/E 1
IN T E R FA C E
C L O C K
S Y N T H E S IS
SDM-300A Satellite Modem
P /O
M O D E M
IN T
L P B K
IR D -A
G .7 03
IR D -B
IS D -A
G .7 03
IS D -B
Rev. 4