SDM-2020 Satellite Demodulator
Data Interfaces
Rev.3
A–17
Table A-8. DVB Interface Connector Pinout, J3 Receive Out
Pin #
Signal Function/Name
Type
Comment
1
Clock A
O
Demod
2
System GND
I/GND
Demod,
LVDS Interface - N/A, jumper on GND only
3
Data 7 A(MSB/Serial)
O
Demod
4
Data 6 A
O
Demod
5
Data 5 A
O
Demod
6
Data 4 A
O
Demod
7
Data 3 A
O
Demod
8
Data 2 A
O
Demod
9
Data 1 A
O
Demod
10
Data 0 A
O
Demod
11
DVALID A
O
Demod
12
SYNC A
O
Demod
13
Cable Shield
O
Demod
14
Clock B
O
Demod
15
System GND
I/GND
Demod,
LVDS Interface - N/A, jumper on GND only
16
Data 7 B (MSB/Serial)
O
Demod
17
Data 6 B
O
Demod
18
Data 5 B
O
Demod
19
Data 4 B
O
Demod
20
Data 3 B
O
Demod
21
Data 2 B
O
Demod
22
Data 1 B
O
Demod
23
Data 0 B
O
Demod
24
DVALID B
O
Demod
25
SYNC B
O
Demod
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.
Table A-9. DVB Interface Connector Pinout, J4 TX In
Pin #
Signal Function/Name
Type
Comment
1
Clock A
I
Mod
Summary of Contents for SDM-2020
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Page 35: ...SDM 2020 Satellite Demodulator Installation Rev 3 2 3 Figure 2 1 Typical Rack Installation...
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Page 209: ...Fast Option SDM 2020 Satellite Demodulator C 6 Rev 3 This page is intentionally left blank...
Page 212: ...SDM 2020 Satellite Demodulator Glossary Rev 2 g 3 W Watt...
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