Comtech EF Data SDM-2020 User Manual
Page 104
SDM-2020 Satellite Modulator
Revision 7
RS-422 Data Interface
MN/SDM2020M.IOM
7-5
Table 7-2. DVB Interface Connector Pinout (J3)
Pin # Signal Function/Name
Type
Comment
1 Clock
A
I/O
Mod/Demod
2 System
GND/REFCLKB
O/GND Mod/Demod
Jumper selectable
SCT for Modulator
Master Clock for Demodulator
3
Data 7 A (MSB/Serial)
I/O
Mod/Demod
4
Data 6 A
I/O
Mod/Demod
5
Data 5 A
I/O
Mod/Demod
6
Data 4 A
I/O
Mod/Demod
7
Data 3 A
I/O
Mod/Demod
8
Data 2 A
I/O
Mod/Demod
9
Data 1 A
I/O
Mod/Demod
10
Data 0 A
I/O
Mod/Demod
11 DVALID
A
I/O Mod/Demod
12 SYNC
A
I/O Mod/Demod
13 Cable
Shield
I/O Mod/Demod
14 Clock
B
I/O Mod/Demod
15 System
GND/REFCLKA
O/GND Mod/Demod
Jumper selectable
SCT for Modulator
Master Clock for Demodulator
16
Data 7 B (MSB/Serial)
I/O
Mod/Demod
17
Data 6 B
I/O
Mod/Demod
18
Data 5 B
I/O
Mod/Demod
19
Data 4 B
I/O
Mod/Demod
20
Data 3 B
I/O
Mod/Demod
21
Data 2 B
I/O
Mod/Demod
22
Data 1 B
I/O
Mod/Demod
23
Data 0 B
I/O
Mod/Demod
24 DVALID
B
I/O Mod/Demod
25 SYNC
B
I/O Mod/Demod
C
L
O
C
K
CO
N
F
I
G
U
R
AT
IO
N
M
O
DU
LA
T
OR
D
E
M
OD
U
LAT
O
R
J3 - 2
&
15
S
C
T
C
LO
C
K O
U
T
J3 - 2 &
15 MA
S
T
ER
C
L
O
C
K
I
D
VB
C
O
N
F
IGU
R
A
TIO
N
(F
AC
T
O
RY
S
E
TT
IN
G
)
J3 - 2
&
1
5 G
N
D
JU
MP
E
R
S
E
LE
C
T
F
O
R J3 P
IN
2
&
1
5
R
S
-422
J3 PARA
LLELJ
4 SE
RIALJ
5 AU
X