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SDM-2020 Satellite Demodulator
Table A-8. DVB Interface Connector Pinout, J3 Receive Out
Pin #
Signal Function/Name
1
Clock A
2
System GND
3
Data 7 A(MSB/Serial)
4
Data 6 A
5
Data 5 A
6
Data 4 A
7
Data 3 A
8
Data 2 A
9
Data 1 A
10
Data 0 A
11
DVALID A
12
SYNC A
13
Cable Shield
14
Clock B
15
System GND
16
Data 7 B (MSB/Serial)
17
Data 6 B
18
Data 5 B
19
Data 4 B
20
Data 3 B
21
Data 2 B
22
Data 1 B
23
Data 0 B
24
DVALID B
25
SYNC B
A.3.4.1.2
Connector Pinouts, J4
Note: Table A-9 is included for reference only. The provided data pertains to the
SDM-2020 Satellite Modulator.
The connector is sub-miniature 25-pin D female, with threaded jack nuts (refer to
Table A-9 for connector pinouts). All signals for this connector are inputs to the
Modulator, except the signal pair on pins 2 and 15 (for an exception, see Figure A-4, for
jumper settings).
When used as a serial data port, Data 7 (pins 3 and 16) are the active data pins. For DVB
parallel operation, Data 7 through Data 8 are used.
Signal levels are as defined in TIA/EIA-644. Per TM1449, the differential sense of all
signal pairs is a logic "1" when "A" is positive with respect to "B". This is the normal
selection in the Configuration Interface menu (see Chapter 3). For DBS applications, the
polarity of signals may be inverted from the Configuration Interface menu.
Pin #
1
Rev.3
Type
O
I/GND
O
O
O
O
O
O
O
O
O
O
O
O
I/GND
O
O
O
O
O
O
O
O
O
O
Table A-9. DVB Interface Connector Pinout, J4 TX In
Signal Function/Name
Clock A
Comment
Demod
Demod,
LVDS Interface - N/A, jumper on GND only
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod,
LVDS Interface - N/A, jumper on GND only
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Demod
Type
Comment
I
Mod
Data Interfaces
A–17
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