
SDM-2020 Satellite Demodulator Revision 4
LVDS Data Interface MN/SDM2020D.IOM
8–7
applications, the polarity of signals may be inverted from the Functional Select:
Configuration: Interface menu.
Table 8-3. DVB Interface Connector Pinout, J4 TX IN
Pin # Signal Function/Name Type Comment
1 Clock A I Mod
2 System GND/REFCLKB O/GND Mod,
Jumper selectable
SCT output for Modulator
3 Data 7 A(MSB/Serial) I Mod
4 Data 6 A I Mod
5 Data 5 A I Mod
6 Data 4 A I Mod
7 Data 3 A I Mod
8 Data 2 A I Mod
9 Data 1 A I Mod
10 Data 0 A I Mod
11 DVALID A I Mod, Modulator Ignores
12 SYNC A I Mod
13 Cable Shield I Mod
14 Clock B I Mod
15 System GND/REFCLKA
O/GND Mod/Demod
Jumper selectable
SCT output for Modulator
16 Data 7 B (MSB/Serial) I Mod
17 Data 6 B I Mod
18 Data 5 B I Mod
19 Data 4 B I Mod
20 Data 3 B I Mod
21 Data 2 B I Mod
22 Data 1 B I Mod
23 Data 0 B I Mod
24 DVALID B I Mod
25 SYNC B I Mod
8.1.4.2 Auxiliary, J5
This port provides for other modem-specific signals not otherwise defined on the data
connectors.
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