Receive Section; Transmit Section - Comtech EF Data SDM-650B Installation And Operation Manual

SDM-650B Satellite Modem

TRANSMIT SECTION

RS-232
ES TO ES ASYNC
INTERFACE
T1/E1 INTERFACE
G.703
T2/E2
CLK
RS-422 INTERFACE
MIL-STD-188-114
DATA
CLK
V.35 INTERFACE
DATA
EXTERNAL REFERENCE CLOCK
(TRANSMIT TERR CLOCK)
INTERNAL CLOCK
Figure F-1. Asynchronous Overhead Interface Block Diagram
Rev. 5
FRAMING/
P/O
TIMING
INT
LOGIC (MUX)
LPBK
TX DEJITTER
P/O
BASE
BAND
LPBK
CLOCK
SYNTHESIS
Asynchronous Overhead Channel Unit

RECEIVE SECTION

P/O
INT
MODEM
LPBK
DEFRAME/TIMING
LOGIC (DEMUX)
PLESIOCHRONOUS
BUFFER
SATELLITE CLOCK
INTERNAL CLOCK
TRANSMIT TERR CLOCK
EXTERNAL REFERENCE CLOCK
RS-232
INTERFACE
ES TO ES
ASYNC
T1/E1
T2/E2
G.703
P/O
INTERFACE
BASE
BAND
LPBK
RS-422
CLK
INTERFACE
MIL-STD
DATA
188-114
CLK
V.35
INTERFACE
DATA
CLOCK SYNTHESIS
F–3