Figure A-5. Async/Aupc Block Diagram - Comtech EF Data SLM-3650 Installation And Operation Manual

SLM-3650 Satellite Modem
Options
The ASYNC interface PCB also provides its own Doppler buffer, which has a maximum
depth of 32 ms at the highest terrestrial data rate. Buffer fill status can be checked in the
Monitor menu on the front panel of the modem. Depth selection and centering of the
buffer are provided in the Configuration Interface menu.
G.703
EIA-422
V.35
EIA-485
T
E
EIA-232
R
R
E
S
T
R
I
A
G.703
L
EIA-422
V.35
EIA-485
EIA-232
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TERR DATA
INPUT
FIFO
TERR CLOCK
PLL
INTERFACE CNT SIGNALS
ASYNC DATA
UART
ASYNC DATA
TERR DATA
TERR CLOCK
BUFFER
INTERFACE SIGNAL
ASYNC DATA
UART

Figure A-5. ASYNC/AUPC Block Diagram

A–20
AUPC DATA FROM M&C
TERR DATA
TERR OVERHEAD CLOCK
MUX
INTERFACE CNT SIGNALS
M&C CONTROL
AUPC DATA TO M&C
TERR DATA
RX CLK
ENABLE
4 OUTPUT
CLK SOURCES
DMUX
PLL
Revision 3
MN/SLM3650.IOM
M
O
D
U
L
A
T
O
R
D
E
M
O
RX DATA
D
RX CLK U
L
INTERFACE
A
SIGNALS
T
O
R