3471-ddc.ib.rev2.doc
page 9 of 20
17/10/2007
Connections:
SPI connectors:
The SPI uses 25 pin 'D' connectors. Cable connectors are male and equipment connectors are female.
Interconnecting cables and connectors must be shielded. Logic levels are LVDS.
Pin
Signal line
Pin
Signal line
l
Clock A
14
Clock B
2
System Gnd
15
System Gnd
3
Data 7 A(MSB)
16
Data 7 B
4
Data 6 A
17
Data 6 B
5
Data 5 A
18
Data 5 B
6
Data 4 A
19
Data 4 B
7
Data 3 A
20
Data 3 B
8
Data 2 A
21
Data 2 B
9
Data l A
22
Data 1 B
10
Data 0 A
23
Data 0 B
11
DVALID A
24
DVALID B
12
PSYNC A
25
PSYNC B
13 Cable
Shield
Alarm connections:
J 1 Alarm relay output
Front & rear panel connector diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show relative positions of
connectors, indicators and controls only.
1 2
INPUT
ALARM INPUT
SCRAM
SCRAM
REED
SOLOMON
INTER-
LEAVE
UP - DECODE
CENTRE - OFF
DOWN - ENCODE
SYNC
204
R - S
R - S
188
DC
DDC-3471
N140
25
1
25
1
SPI OUT
SPI IN
ASI OUT
ALARMS
LK 5
NC
NO
IRT
Communications
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